Fastest ET's with a TPI 305?
08-25-2006, 10:25 AM
#1
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Car: 1986 Iroc Z 28
Engine: 383
Transmission: 4L60
Axle/Gears: 3.73
Fastest ET's with a TPI 305?
What are some of the best 1/4 et's that anyone has seen or heard a modded tpi 305 do?
08-25-2006, 11:32 AM
#2
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Car: 90 IROC-Z
Engine: 305 TPI
My bone stock 90 305 IROC ran a mid 15's @ around
91-92 MPH. It was a cool spring day in 1990.
The car had less 1000 miles on it and I only did maybe
5-6 runs with it. I don't have the timeslips anymore.
I only remember because it was about 1 sec slower then
my 87 350 IROC which consistantly ran mid 14's around 95 MPH. It was completely stock as well.
91-92 MPH. It was a cool spring day in 1990.
The car had less 1000 miles on it and I only did maybe
5-6 runs with it. I don't have the timeslips anymore.
I only remember because it was about 1 sec slower then
my 87 350 IROC which consistantly ran mid 14's around 95 MPH. It was completely stock as well.
08-25-2006, 11:36 AM
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Car: 87 Iroc
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: stock posi
ive heard them getting as low as mid to low 14's, but have ran mine just a day ago and it ran a mid 15 (15.5). its almost all stock.
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08-25-2006, 03:38 PM
#10
That's not mine, so I'm not sure what was done. I would expect at least a decent set of rods, good balancing, and a fast-closing cam a little better suited to a turbo. I'm thinking that some traction issues may have been resolved, too.
Last edited by Vader; 08-25-2006 at 03:42 PM.
08-25-2006, 05:10 PM
#12
Jonarotz, most others here posted NA times. Your 13.1 is very good, off the bottle I suspect it runs 14.50s??
Vader, I believe the car pictured in your post belongs to Preston Smith, and while it is technically a 305, it has a 4" bore unlike our 305s with a 3.73 bore. It is a pretty serious combination, not a heads and cam 305 like some of us have. This car used to run in the 9s with a blower a few years ago. Last I heard he was still working the bugs out of his turbo. There are more pics of Preston's car around here if you do a search.
I think the quickest TPI 305 on here that I know of is Tuned Port 335, but obviously he has a stroked 305. From memory I believe he has ran 13.4 @ 98mph. Tim Burgess reportedly had run an 11.9 or something with a stickshift car but I have never heard or seen any proof. My 305 is somewhere in the mix, maybe even 2nd quickest and the fastest barring Tim Burgess. There are faster 305s like mw66nova but they are not TPI cars. My times and mods are in my sig. with a better launch I have the power to match TunedPort335s ETs. There may be faster TPI 305s around here but they are either slipping my memory or I am unaware of them. Anybody in the mid to low 13s with an NA LB9????
Vader, I believe the car pictured in your post belongs to Preston Smith, and while it is technically a 305, it has a 4" bore unlike our 305s with a 3.73 bore. It is a pretty serious combination, not a heads and cam 305 like some of us have. This car used to run in the 9s with a blower a few years ago. Last I heard he was still working the bugs out of his turbo. There are more pics of Preston's car around here if you do a search.
I think the quickest TPI 305 on here that I know of is Tuned Port 335, but obviously he has a stroked 305. From memory I believe he has ran 13.4 @ 98mph. Tim Burgess reportedly had run an 11.9 or something with a stickshift car but I have never heard or seen any proof. My 305 is somewhere in the mix, maybe even 2nd quickest and the fastest barring Tim Burgess. There are faster 305s like mw66nova but they are not TPI cars. My times and mods are in my sig. with a better launch I have the power to match TunedPort335s ETs. There may be faster TPI 305s around here but they are either slipping my memory or I am unaware of them. Anybody in the mid to low 13s with an NA LB9????
Last edited by 1MeanZ; 08-25-2006 at 05:14 PM.
08-25-2006, 07:21 PM
#14
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Car: 1985 Z28
Engine: 85 L98
Transmission: 700r4
Axle/Gears: stock 10 bolt-3.73 eaten posi
14.7 @ (i think 93) bone stock.
and 14.2 with the 373s in the back.
and 14.2 with the 373s in the back.
08-25-2006, 08:18 PM
#15
a TPI 305 with fresh bottom end, and trick flow's new 175cc runner heads ported out with a matching big cam and full aftermarket TPI should damn well go low 13's if not high 12's well driven with a stick car and 3.70-4.10 gears
theres lots to be had but no one really builds 305s. its cheaper and faster to do a 350.
theres lots to be had but no one really builds 305s. its cheaper and faster to do a 350.
08-25-2006, 10:23 PM
#16
Actually that is my goal. I want to develop around 350hp at the crank, be able to tickle the high 12s and still get 28mpg highway and 20-24mpg mixed. Heck I don't have a custom tune or even have a roller cam in mine right now! I think with the big LTR intake parts, a new roller cam, massage my heads a tad more, up the compression, and throw in a custom tune, I think I can make 350 hp and go 12s while not hurting my mileage any with a small 305. I think it is kind of a fun challenge actually.
08-25-2006, 10:37 PM
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Car: 1987 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
.... Tim Burgess reportedly had run an 11.9 or something with a stickshift car but I have never heard or seen any proof....
Just contacted Tim. He ran it at Firebird (Phoenix, AZ) a couple of years ago. I'm sure he'll be chiming in within a couple of days with all the details...
As for me, just one word, "Soon."
Willie
Just contacted Tim. He ran it at Firebird (Phoenix, AZ) a couple of years ago. I'm sure he'll be chiming in within a couple of days with all the details...
As for me, just one word, "Soon."
Willie
08-25-2006, 11:49 PM
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Car: '92 Z28; Dk Teal; Her Pkg
Engine: 305
Transmission: Richmond 6 Spd
Axle/Gears: Moser 9", Detroit Locker, 3.70
Yup, Firebird......back when I still had the stk T5 & 10 bolt rear.....
08-26-2006, 01:53 AM
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Car: '89 GTA 9,000 MILES
Engine: 350
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
.... Tim Burgess reportedly had run an 11.9 or something with a stickshift car but I have never heard or seen any proof....
Just contacted Tim. He ran it at Firebird (Phoenix, AZ) a couple of years ago. I'm sure he'll be chiming in within a couple of days with all the details...
As for me, just one word, "Soon."
Willie
Just contacted Tim. He ran it at Firebird (Phoenix, AZ) a couple of years ago. I'm sure he'll be chiming in within a couple of days with all the details...
As for me, just one word, "Soon."
Willie
08-26-2006, 08:38 AM
#20
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Car: 1987 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
Yes. Retained the IC's but no more supercharger. Also replaced water/alky injection with progressive methanol injection.
Willie
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08-26-2006, 12:46 PM
#22
Tim Burgess, details please? I am hungry for info. I see your sig now says 11.69?! Was this NA? If you are doing this on the motor I want details! 
Same goes for your Berlie. 13.50 is strong. Maybe I should do a search and see if you posted any info at the time of the build..........
I love all sweet power adders you guys with fat wallets are running on 305s. I must say my personal interest in this tread (besides seeing and learning about badass 305s) is who is the quickest and fastest NA TPI 305 because I am poor and can not afford big air pumps like you guys, and I kind of want to see where I am in the mix of guys with NA LB9s. (some credit must go to Willie because he advised me to use the heads I have)
Willie your car was awesome already, now it is just beyond description. Same for Preston Smith's car, really sweet ride.
Same goes for your Berlie. 13.50 is strong. Maybe I should do a search and see if you posted any info at the time of the build..........I love all sweet power adders you guys with fat wallets are running on 305s. I must say my personal interest in this tread (besides seeing and learning about badass 305s) is who is the quickest and fastest NA TPI 305 because I am poor and can not afford big air pumps like you guys, and I kind of want to see where I am in the mix of guys with NA LB9s. (some credit must go to Willie because he advised me to use the heads I have)
Willie your car was awesome already, now it is just beyond description. Same for Preston Smith's car, really sweet ride.
08-26-2006, 04:34 PM
#23
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Car: 1989 Formula Ws6
Engine: 305 tpi
Transmission: 5speed
Axle/Gears: 3.23
i know of this guy because he has a turbo cavalier that runs 12s i might add lol
but we're on the same site. hes on here too
Twin Turbo 89 IROC-Z
granted its stock 350 but its real nice
but we're on the same site. hes on here too
Twin Turbo 89 IROC-Z
granted its stock 350 but its real nice
08-28-2006, 05:18 PM
#24
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Car: '92 Z28; Dk Teal; Her Pkg
Engine: 305
Transmission: Richmond 6 Spd
Axle/Gears: Moser 9", Detroit Locker, 3.70
11.69 is with 150 hp nitrous. My best NA time is in the high 12's.
I've been working on my Z for 14 years now, so there is some $ in it, but over quite a long duration of time......
08-28-2006, 09:39 PM
#25
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Car: 91' Camaro
Engine: 383 ci
Transmission: T-56
Axle/Gears: 9 bolt / 3:70
A few years back, I personally watched Tim Burgess run at Famoso raceway in Bakersfield Ca. The car is as fast as he claims... No B.S. from him.
Jason
Jason
08-28-2006, 10:17 PM
#26
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Car: 1987 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
Tim is really a modest guy and rarely toots his own horn.... one of the best friends I've ever had too. I, on the other hand, will tend to brag once in a blue moon. So I've taken the liberty (sorry Tim) to post some pics of his car. The burnout was at Famoso.... He also hasn't told you that back in 1998, we dynoed our cars. With no nitrous, he pulled slightly over 300 rwhp. Not shabby for a 305....
Willie
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08-29-2006, 04:43 AM
#27
300rwhp? Good grief that is roughly 425hp at the crank assuming 20% loss from his Richmond. That manual trans may not be costing him that much power but that is still easily over 400hp. That really is stout, here I thought I was something because I am one of few guys trapping 100mph or over. Guess it's back to the drawing board! 
08-29-2006, 05:34 AM
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Car: '92 Z28; Dk Teal; Her Pkg
Engine: 305
Transmission: Richmond 6 Spd
Axle/Gears: Moser 9", Detroit Locker, 3.70
300 / 0.85 = 353 hp - still not to shabby for the tiny mouse N/A.......
08-29-2006, 12:50 PM
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Car: 2006 Corvette
Engine: LS2
Transmission: T56
Axle/Gears: 3.42s
- stock short block
- Trickflows 175cc small bore heads
- CompCams XFI 218/224 grind w 1.5 rockers
- 1 5/8" longtubes into 2.5" true duals with Xpipe
- of course all the mandatory suspention, tire, and chassis mods along w weight reduction
hopefully this will net me mid - high 12s with a trap speed somewhere around 105 - 110mph. then i hope to be dipping into the 11s with spray at 115 - 120mph
08-29-2006, 12:54 PM
#31
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I love my 305 and always respected them for what they are. But reading about a few guys with monster 305's then actually seeing Willie's TT 305 car in person this last weekend, all I can say is what's 45 fewer cubic inches when your car can make that much power and look that damn good.
305 baby!!!
To those that care, I blew my motor back in Feb and had it rebuilt. Yes, you read right, I had my 305 rebuilt to the exact same specs as before and actually reused my stock L98 cam. Now that is loyalty to the 305.
305 baby!!!
To those that care, I blew my motor back in Feb and had it rebuilt. Yes, you read right, I had my 305 rebuilt to the exact same specs as before and actually reused my stock L98 cam. Now that is loyalty to the 305.
08-29-2006, 02:05 PM
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Car: 1987 Iroc Z28
Engine: The KING of the 3rd gen TPI's.
Transmission: Beefed up T5
Axle/Gears: Aussie 3.45's
My '87 5 spd LB9 tpi ran a 14.9 with headers, airfoil, pullies, afpr, cold air intake, 1.6 rr's, smog delete, no cat and flows. No internal engine mods, aftermarket heads, or porting of any sort.
And no, I wouldn't go back to a 305.
And no, I wouldn't go back to a 305.
Last edited by freestylzz; 08-29-2006 at 02:09 PM.
08-29-2006, 02:29 PM
#33
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Car: 1991 Firebird Formula WS6
Engine: LB9
Transmission: T5
Axle/Gears: 3.42's
i consider my little TPI 305 to be pretty quick for the lack thereof real mods that it has... im in the process of adding headers which im hoping should put me into the 13's.... then over the winter i should be adding a cam and porting my heads, then some drag radials and im shooting for low 13's
08-29-2006, 04:37 PM
#34
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Back in my 305 days running a Comp 210/220 grind, stock untouched vette aluminum heads, stock semi ported TPI, SLP Tri-Y headers, 3" exhaust, 3.73 gears, and with stock T5 she went 13.6x at 101mph. On an 80hp shot of nitrous, she went 12.81 at 109.5. Full weight on 17" wheels. I loved telling people it was just a 305!!
08-29-2006, 04:47 PM
#35
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when I had a 305 in my car I went 11.87 @112 w/a 1.56 60ft. Mods were ported s/r torquers, lpe 211 cam, 1.6 rr's, TPIS big mouth base, edelbrock runners, Edelbrock headers, ported plenum, stock tb, 2800 stall, 3.73's w/Auburn, 150 shot. The car also weighed 3600lbs
08-29-2006, 10:39 PM
#37
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Car: 1987 IROC Z
Engine: LB9
Transmission: 700-4R
My stock 87 TPI 305 has good torque and power for daily commute... OHHH... it also has 270,000 ORIGINAL MILES!!!! and still running strong. Not a peep of smoke on start up and my oil control is still pretty good...(no fouled plugs).
THANKS TO CASTROL GTX 10w-30 every 3,500 miles.
THANKS TO CASTROL GTX 10w-30 every 3,500 miles.
08-30-2006, 12:23 AM
#38
yeah theres no reason a good running 305 combo cant make 1.2 hp per cube. 350 hp should be well within reach.
what i really want to do is build a solid all forged 302...destroked 350 block.. with good heads and miniram/stealth ram and smaller solid roller. high compression and rev it to 7000rpms plus or so. just like a modern day version of the old dz302 z28 motor
what i really want to do is build a solid all forged 302...destroked 350 block.. with good heads and miniram/stealth ram and smaller solid roller. high compression and rev it to 7000rpms plus or so. just like a modern day version of the old dz302 z28 motor
08-31-2006, 12:18 PM
#39
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Car: 89 formula
Engine: 305tpi
Transmission: t-56
Axle/Gears: ford 9" 4.11s
i ran a 13.94 at 98mph in my 89 305 tpi formula i have an slp cold air box mac headers no cat no a.i.r and a descreend maf its a 5spd with 3.45 gears ina 9 bolt
09-03-2006, 08:25 AM
#40
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Car: I've had 4 thrid gens!!
Engine: Someday again I will have another!!
I have enjoyed reading this post. Some cool a$$ 305's. Can you guys give me any idea of were my car should be in the quarter mile?
'87 iroc 305 TPI with RV cam, full tube headers, no smog, 3" Y-pipe w/ flowmaster muffler 2.5in outlets, cool blue filters w/gutted housing. Auto tranny that seems to shift a little soon......like a little over 4K rpms.
That is all I have detected. Any guesses?
I am hopefully going to the track on the 23rd. You guys have any free mods I should make sure I got done?
Thanks, Nick.
'87 iroc 305 TPI with RV cam, full tube headers, no smog, 3" Y-pipe w/ flowmaster muffler 2.5in outlets, cool blue filters w/gutted housing. Auto tranny that seems to shift a little soon......like a little over 4K rpms.
That is all I have detected. Any guesses?
I am hopefully going to the track on the 23rd. You guys have any free mods I should make sure I got done?
Thanks, Nick.
09-03-2006, 04:26 PM
#42
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Car: 1987 Camaro Z28
Engine: 335 TPI Stroker
Transmission: Tremec TKO 500
Axle/Gears: 10 bolt / 3.42
Im probably somewhere in the mix, even though its not a 305 anymore... i dont think it would go much slower with a stock crank in it.
13.413 is my best time so far. That was with a 8.371 1/8th time (typically a high 12 second run) but the stock TPI and heads kill it when it hits 3rd gear. As it sits, the car runs 13.7s @ 98mph pedaling out of the hole.
i probably won't drag race much more though, time to make the car handle.
13.413 is my best time so far. That was with a 8.371 1/8th time (typically a high 12 second run) but the stock TPI and heads kill it when it hits 3rd gear. As it sits, the car runs 13.7s @ 98mph pedaling out of the hole.
i probably won't drag race much more though, time to make the car handle.
09-08-2006, 12:00 AM
#45
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Car: 1987 Trans Am
Engine: 383
Transmission: TH400
Axle/Gears: 9 bolt 4.11
Got this tonite. w/ a story...because 12's are coming next week
Well I actually did get to run this time....Last time I wanted to run at KK the car started puking oil all over and I had to sit out on drag day....b*tch'
Tonite, I actually got to run the car! Bad thing is that I have a flipping boost leak now. Before when into it, it would jump to 7psi and pull hard to 15psi. Today it would only build about 7psi and it didnt build that till half way down the track. all I could get was 3 13.6's @ 105, 104, 104.....So apart comes the blue b*tch starting tomorrow and next thursday I'll make my second attempt to run on the full 15psi....hoping for a good 12 second street tire run...I hope!
I guess 13.6 at 105 on a 155,000 mile 305 w/7psi isn't to hateful but I know it has a shatload more in it. hell, my methanol injection never even got to turn on...
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Well I actually did get to run this time....Last time I wanted to run at KK the car started puking oil all over and I had to sit out on drag day....b*tch'
Tonite, I actually got to run the car! Bad thing is that I have a flipping boost leak now. Before when into it, it would jump to 7psi and pull hard to 15psi. Today it would only build about 7psi and it didnt build that till half way down the track. all I could get was 3 13.6's @ 105, 104, 104.....So apart comes the blue b*tch starting tomorrow and next thursday I'll make my second attempt to run on the full 15psi....hoping for a good 12 second street tire run...I hope!
I guess 13.6 at 105 on a 155,000 mile 305 w/7psi isn't to hateful but I know it has a shatload more in it. hell, my methanol injection never even got to turn on...
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09-11-2006, 08:04 PM
#46
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Car: Z28 / GT
Engine: TPI 5.0 / 3V 4.6
Transmission: A4 / M5
Axle/Gears: 3:23 / 4:30
thats sucks man, hopefully It will work out the next run
I don't know what my car would do in the quarter but only mods I have now is
1986 Camaro Iroc
LB9 305 TPI A4
- Edelbrock Hi-flo Intake / runners - ported
- TPIS airfoil
- custom stainless 3in /2.5in exhaust
- 700r4 w/ shift kit/ trans cooler
- 3:23 rear
I don't know what my car would do in the quarter but only mods I have now is
1986 Camaro Iroc
LB9 305 TPI A4
- Edelbrock Hi-flo Intake / runners - ported
- TPIS airfoil
- custom stainless 3in /2.5in exhaust
- 700r4 w/ shift kit/ trans cooler
- 3:23 rear
12-05-2006, 02:59 AM
#47
During the Fbody vs Foxbody shootout the best time i ran was
16.2 @ 82 mph
All smog equipment and EGR is hooked up and running, along with the A/C.
You guys that are running 15 second quarter miles, do all you have numerically higher gears than 2.73? My car has nice launch but its just not fast in the 1/4 with the auto and the steep 2nd gear. On the highway it can really move after it gets to 3rd gear.
Those with 3.23 and auto's, how is the cruising in your cars? Going 70mph my car is right at about 2000RPM, and its just purring along.
16.2 @ 82 mph
All smog equipment and EGR is hooked up and running, along with the A/C.
You guys that are running 15 second quarter miles, do all you have numerically higher gears than 2.73? My car has nice launch but its just not fast in the 1/4 with the auto and the steep 2nd gear. On the highway it can really move after it gets to 3rd gear.
Those with 3.23 and auto's, how is the cruising in your cars? Going 70mph my car is right at about 2000RPM, and its just purring along.
12-05-2006, 08:22 AM
#48
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Car: I've had 4 thrid gens!!
Engine: Someday again I will have another!!
I have 3.23's and auto.........2500rpms @ 75 mph. I cross the 1/4 mile mark at about 4500 rpms in 3rd gear. This is going by the factory tach, but it seems to be accurate. I am running stock 16 inch rims with stock tire sizes too. -Nick.
12-05-2006, 10:11 PM
#49
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Car: 91 GTA & 92 GTA & 92 GTA
Engine: 305 TPI & 350 TPI & 350 TPI
Transmission: 700R4
Axle/Gears: 3.42 & 3.23 & 3.23
I've run a 15.03 @ 91 mph with my mildly modded 91 GTA. I'm hoping for 14s in 2007. See my sig for my list of mods.