1991sleeper

iTrader: (-3)

Mmuuwwahahaha .... as some of u know I recently built a fairly extravagant little 305 SBC that sets in my 91' base model firebird that I've owned for around 7 years ...

Since I got it I've been ever so slowly modding things here n there as money permits ....

As the car sets now I'll start with suspension
18" C6 wheels with continental 255/50/18's out back , 4:10 gears, disc rears , custom tubular/adjustable pan hard & LCA's , UMI torque arm , BMR T-5 trani cross member, competition engineering SFC's , wonderbar , WS6 sway bars, drilled rotors , factory MOOG springs , and Monroe shocks/struts....

Engine .. 1991 305 HR block .030 over , stock bottom end with all ARP bolts and studs , fully balanced crank and rods , speed pro hypereutic flat tops 5cc reliefs, decked .013 pistons .012 in hole , melling HV oil pump , Howard's HR cam , comp short travel lifters , summit 1.6 FRR, Howard's chromoly .080 pushrods, summit billet double roller timing set , march under drive pulley set , Trick flow super 23 175cc heads 56cc chamber , summit stage 2 dual plane w/ divider cut down , cfm tech 620cfm TBI , aeromotive VRFPR, EBL flash & TT-1 WBO2.....

I am still working on the tune so i believe its still got a good bit of power left in it ESPECIALLY if I can get the money to completely redo the exhaust ... cause its all crush bent crap with some 100$ summit shorties with only 1.5" primaries which I think is really holding it back above 4k up to 6k ...

But it does run pretty darn good

So aboit a month after I got the engine back in a new 5.0 stang was lesson with me on the hwy coin about 50 so I dropped down to 4th and we both kicked it about the same time and I was a car length ahead of him when I let off around 5k at the top of 4th .. I wasn't really pull in him but just staying about equall but if I would a ran it up to 6k I believe I would a pilled him quite well

So today I got 2 more cars off the list a 99 cobra mustang and around a 95-96 300zx TT

The cobra was first and similar to the new 5.0 situation but I pulled this cobra pretty flip pin hard from 3-6k in 4th gear .. and when I let off he come by me with the thumbs up sign lol .. he was an older gentleman around 50-55 ...

The 300z never had a chance I was baby in mine through every gear granny shifting , easy on the clutch and the go pedal ... and pulled him pretty dang hard through the first 4 gears TWICE ! He wasn't as happy as the older guy lol mabey slightly irritated ..

The cobra appeared mostly stock and idk about the 300 but it looked very clean and lightly modded

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

1991sleeper

iTrader: (-3)

Add a modded 2014 v6 camaro to the list

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

DiabolicalRS

gotta invest in a gopro so we can all watch..
but good job

1991sleeper

iTrader: (-3)

Awesome night at the track guys ! Still ain't got the tune perfect but its closer .. ran a all time best of 8.902 @ 82mph with a 2.125 60'

These black guys had a late 80's Monte with t tops and 22's but they did have it geared right with some wide *** tires ... they were trying to hustle me all night when they were the ones being hustled ... meanwhile extra 100$ in my pocket lol .... but they went over my motor with a fine toothed comb swearing up and down it was a 350 ... which they did have a 350 with a short style single plane rusty ole long tube headers and a full exhaust system ... their motor sounded like it had a little more cam than mine ....

But anyways ... they got me off the line every time by a fender and half a door .. his 60 was 2.00-2.08 with our reaction times pretty close ... he had me by a fender till half track then soon as I grab third gear I came around him and won by a car length or a little more EVERY TIME!!! I bet we did this 10 times through the night with the same exact outcome every time !

On another note every time I get off the concrete it starts wheel hopping bad to where I gotta let off n get back in it .. so some LCARB's will b put on tomorrow along with some exhaust mods ... 8.5's and 200$ next week guys ... 8.0's on motor is my goal for the season even if its 8.0999999999 lol

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

1991sleeper

iTrader: (-3)

Oh and my gf is getting me a go pro for my bday ! But that's at end of July sry :/

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

graysmoke

What kind of HP are you putting out of that 305?

1991sleeper

iTrader: (-3)

Have no idea ... some of us here on the forum are guestimating around 350 the way it sets and capable of 380 or so with new exhaust setup

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

1991sleeper

iTrader: (-3)

There is a complete build thread on the motor titled "LO3 Rebuild(HP estimates)"

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

1991sleeper

iTrader: (-3)

New best of 8.854 2.088 60

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

zraffz

Your high 13 second car beat a 5.0?

1991sleeper

iTrader: (-3)

In a 4th gear pull yes

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

1991sleeper

iTrader: (-3)

And I guarantee I'll run better than 13.5 in 1/4 the way it sets ... my **** dont start coming on strong till half track in the 1/8 and really don't start pullin hard till 3 rd n 4th gear..... all the cars I've run in 1/8 th with 350's get me off the line then I pass them half track and win by a car length

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

1991sleeper

iTrader: (-3)

And im running these times on street tires spinning bad .... I'm only seeing about 60% tps throughout 1st gear then 70-80% tps for a split second in 2nd gear then 100%tps thru 2nd and 3rd crossing line around 56-5800 in 3rd

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

92g92

Haha lol. No. Just freaking no. Maybe you really beat a new 5.0, but if you did, he either wasn't racing, or his car was way out of whack. You have put a lot of work into your car and regardless of my opinions, I will respect that and intend no insult. But absolutely do NOT get used to beating a 2011+ Mustang GT. Most likely, you will never do it again with your car how it currently sits. They are high to mid 12 second cars. Even in fourth gear they will own you like a pet.

1991sleeper

iTrader: (-3)

With sticky tires and new exhaust I will b running 8.00's with this setup

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

92g92

That's a good time, for a 305 TBI. I'm not bashing your car, at least I hope not. I'm pointing out that calling out some dude and his new 5.0 would be a horrible idea. Those things will run 7.75's and be trapping just north of 90 in the 1/8, and the gap would only get substantially wider in the next 1/8.

1991sleeper

iTrader: (-3)

No offense taken ... all I know is my car pulls really hard in 4th gear that's where it shines .. and at the top of third is 82-84mph and I believe I would b pushing the top of 4th in the 1/4 ... I know the best time my dad got out of his 08 GT CS 5 speed was 8.97 I don't remember the mph .. so I told him the other day I was ready for him and he said OK I gotta go get some drag radials lol FTW ! But he also broke 2nd gear synchro last time he ran under 9.0 and his warrantee is now over lol

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

1991sleeper

iTrader: (-3)

And I believe some ppl are underestimating how hard this thing pulls through 3rd and 4th .... on top.of that this can pulls really hard starting at around 44-4500 and when I short at 6k RpMs drop right back to 43-4600

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

AutoRoc

iTrader: (1)

Sounds like it runs good! Hooking up on 18's is a chore I bet.

Wallace racing calculator says 290-320hp assuming you trap about 105mph and you weigh 3500lbs with driver.

Sounds like he lugged 6th gear in that 5.0 coyote stang...i mean you even stated that you were lugging 4th gear only to 5000rpm... If you say your engine pulls hard at 6000rpm and we can guess it makes 320hp...well at 5000rpm you are probably making about 250hp.. Sooooo lugging a 250hp engine vs a 412hp 5.0 doesnt nearly add up.

Fingers crossed that tires/exhaust get you into the bottom 12's!!!

Fast355

iTrader: (2)

People underestimate what a good set of heads on a 305 with the right cam and supporting mods can run like. I have a hydraulic flat tappet cam with relatively short duration, a set of ported 059s with 1.94/1.60 valves, and a set of 1 3/4" primary long tubes into a pypes 2.5" dual exhaust with X in my 1980 Corvette. Recently swapped to a 4.3 S10 stalled 4L60E and and running a Vortec CSFI intake manifold. Trapped 110 mph in the 1/4 on street tires with the 3.07 rear gear.

AutoRoc

iTrader: (1)

Id like to see a 305 buildup with AFR195's, SuperVic, XR288 solid roller, 11;1 comp.

1.5" primaries might work ok too.

Fast355

iTrader: (2)

I ran a super victor on my vortec head 305 and it ran very well.

I would be more interested to see what it would do with a set of ported edelbrock ETec 170s and a XFI 280 with a stealthram intake on top.

1.5" primaries are too small.......1 5/8 or 1 3/4 for a healthy 305 also needs atleast dual 2.25 if not 2.5" exhaust or a single 3".

92g92

I don't doubt it. For most cars, at least from my experience, 2nd gear is the "fun gear", so hearing that a 3rd to 4th pull is where it's at and that it really runs in 4th gear is a little odd, so I can understand why people might scratch their heads. Sounds fun, I bet it's entertaining to have a hard 4th gear pull.

Fast355

iTrader: (2)

The old LS1 6spd cars had a great 4th gear. 1st and 2nd were short, almost too short, 3rd gear was a little too close to 2nd, but 4th gear aka 1:1 would accelerate those cars from about 80 to 140 mph on the freeway.

1991sleeper

iTrader: (-3)

Also remember I have a 3.35 first gear with 4.10 rears :-o

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

1991sleeper

iTrader: (-3)

Can't wait to get my exhaust redone ,t56 in , and my go go juice :-p ..... I'm also seriously thinking about going to a single plane intake ?

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

jdreswick

Is your t-5 stock? i want too know how well it holds up to the extra hp.

1991sleeper

iTrader: (-3)

Yes its stock .. no problems yet ... just changed the fluid when I did the rebuild

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades. 24mpg @ 2500rpm hwy. 8.80@ 84mph 1/8th on street tires... 8.000's soon

jdreswick

your can sounds pretty sweet for a 305. i like that your doing something a little diferent by building this instead of a 350.

1991sleeper

iTrader: (-3)

Thanks man ... u can check out the whole build thread titled LO3 rebuild HP estimates

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades. 24mpg @ 2500rpm hwy. 8.80@ 84mph 1/8th on street tires... 8.000's soon

jdreswick

Sweet im checking it out!

1991sleeper

iTrader: (-3)

To go along with this ... I don't even use 1st gear on the street just cruising around I tskr off in 2nnd ... And hell I can put it in 2nd n dump clutch around 2500 n burn tires for a city block lol

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades. 24mpg @ 2500rpm hwy. 8.80@ 84mph 1/8th on street tires... 8.000's soon

1991sleeper

iTrader: (-3)

If any tunning gurus wouldn't mind helping me get the last 10-15% outs this build I started a thread with bin and catalog n all that good stuff

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades. 24mpg @ 2500rpm hwy. 8.80@ 84mph 1/8th on street tires... 8.000's soon

1991sleeper

iTrader: (-3)

I just found out that 80's Monte was a 383 stroker ... Wtf !?! ... I would b ashamed ..... This dude was at gas station he was with the dude in the Monte that night ... He stopped me n talked about the night for a min .. N told me let him know next time I go n he will put the $ up n split profit wit me lol

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades......... 24mpg @ 2300rpm hwy 65mph ........ 8.63@ 85mph 1/8th on street tires... 8.000's soon

Street Lethal

iTrader: (16)

Should have some track times very soon with my 305, just need to install a kill switch in the back because of the battery relocation, otherwise it won't pass through tech. Should run 11's in the 1/4 no problem with 8-psi and a decent launch, 10's in the 1/4 no problem with 15-psi and good launch, and 9's in the 1/4 no problem at 20-psi with a great launch...

Orr89RocZ

iTrader: (20)

Love to see the dyno numbers... 82 mph trap is like 250-260 whp. Thats not gonna pull a 5.0 but not bad for a 305 car.

My bolt on 330 whp ls1 ta only goes 7.9-8.0 at 85 which is 12.5 at 108 1/4 and will just hang with stock 5.0's. manual 5.0 is a 360's whp car stock

1991sleeper

iTrader: (-3)

I got down to a 8.63 @ 85 on street tires last time out

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades......... 24mpg @ 2300rpm hwy 65mph ........ 8.63@ 85mph 1/8th on street tires... 8.000's soon

1991sleeper

iTrader: (-3)

And I'd like to see dyno numbers too .. The closest thing ill ever c to a dyno is desktop dyno 2000 lol ... Which actually seems fairly close if u set it all up right with head flow n all that good stuff ....I know it would b a fairly wide power band with the 114lsa ...

I kinda wish I would a went with a 112 LSA or bumped it up to 220@ .050 intake at the same 114 ... I'm gonna go to my dads in a few days and we r gonna redo the exhaust and try to use these 2 pypes M80 bullets and pie cut everything for dual 2.5's ... When I first got it running i had a 3" cutout which is now gone due to a speed bump and it ran A lot stronger on the big end with the cutout ... Now it seems restricted above 5k ....

I also got the tallest tire I can fit on it now without rolling the fender lip so that should help my 60ft and mph a little .... 4.10's and 3.35 first gear is relatively short lived ...

I thought about trying to leave in second @ about 3k instead of leaving in first @ 1500 ... But I figured the tranny wouldn't last long

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades......... 24mpg @ 2300rpm hwy 65mph ........ 8.63@ 85mph 1/8th on street tires... 8.000's soon

jdreswick

Anything done to your t-5? your clutch? are they stock?

1991sleeper

iTrader: (-3)

Both stock .. Last timeout at the track I noticed some clutch slipat the top of second and third gear both around 6k ... Next mod will b a good shifter ..and i replaced the 250k mile trans fluid when I pulled motor with royal purple atf ... It seemed a little too slippery for the trans the first 2 days it was grinding gears if I tried to bang gears but it seems much smoother now

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades......... 24mpg @ 2300rpm hwy 65mph ........ 8.63@ 85mph 1/8th on street tires... 8.000's soon

1991sleeper

iTrader: (-3)

91' bird 305 TBI T-5, trick flow 175 cc heads, 4.10 gears, lots of suspension upgrades......... 24mpg @ 2300rpm hwy 65mph ........ 8.63@ 85mph 1/8th on street tires... 8.000's soon

1991sleeper

iTrader: (-3)

Add a brand new ram 1500 with bolt ons and a f350 TD to the kill list lol ... The f350 was from a dead stop n didn't have a chance the ram was from a 60mph roll up to the top a 4th gear and he jumped first and I passed him and he was about a car back when i let off at 5500... My tune still aint right ... Gotta get a new WB o2 ASAP!

1991sleeper

iTrader: (-3)

...

big hammer

it depends where you're running. i have no idea what this guys DA is when he's at the track.

my brothers bone stock 5.0 would run 8.8's at 81 mph in 3800 DA.

they typically run 13.0-12.9 at sea level.

so if 91 sleeper is running 85+ mph in 3000-4000 DA, he could easily lay waste to a new stock 5.0. i guess we'll just have to ask him what it is.



btw cool build, sleeper! i'm in the process of building a very similar 305, except with an HSR.

oh and those shitty 1.5" primarys are killing you. go straight to 1.75's and don't look back.

padak

iTrader: (10)

I am glad there are people building the 305. I have a carb'd 305 with vortec heads, victor intake, edlebrock 650, Lunati Voo-Doo cam, MSD ignition and coil, Hedman logtubes, 3" single exhaust hi-flow cat, muffler.. Hope it does me good. It was free and I am just tossing it until to get the car running when I am done with body work. If I am satisifed with it, it stays, if not.. swap 2-3 years down the road.

1991sleeper

iTrader: (-3)

Idk nothin bout DA but track night was prolly 85 degrees 90-100% humidity an I'm about 1000ft above sea level

1991sleeper

iTrader: (-3)

About 2 weeks ago woulda been best weather around here for racin ... It done got too cold now

1991sleeper

iTrader: (-3)

Parting car out .. was totaled in front passenger side thread in classifieds