IROCZ28dan

My car is the iroc, not done yet. I have it in the shop. I'm swapping my 14.9 second stock 305 out for:

SDPC 350 TPI w/ Vortec heads, LT4 hot cam and stuff.
24# injectors, SLP runners, hooker 2055 headers, catco cat and hooker cat back. Holley AFPR. Spohn LCAs w/ relocation brackets, SFCs, and adjustable panhard. 3.42 posi rear. Custom tune. 700r4 with 3000 stall TC and shift kit.

His car will be a bone stock 99 T/A...LS1 M6, beat to **** by him. Hes never run it. Brought it to the track, but watched...go figure.

Our friends talk...they always say "a race between you two would be real close, itd be an awesome race"

In my head I'm gonna have at least a car on him if not more. I think his car will go 13.6 if hes lucky...my tuner agrees that I can go into the 12s with traction. Our race wouldn't be on the strip though. Most likely light to light or something...somehow making me more confident.

Whats your opinions?

ThraxXx

Well you just stated that he has never ran his car but can the guy drive? It could just all come down to human error/lack of experience. If he can't drive and just hammers down on the gas off the line then he will sit there for a bit while he re-coats the pavement with rubber while you are screaming down the track.

IROCZ28dan

He can drive for daily driving. Not race though. No one ever seems to know about power shifting around here. But just the same...if he could drive...I bet the best his car would do was a 13.6...mainly because its a beat LS1...upwards of 60-70k miles and the first couple of weeks he had it he did donuts out the ***.

I think I'd win because i should be putting close to 300 rwhp down and close to 400 rwtq.

RS Chris

Your power numbers are pretty close. That same motor with a stock intake put down 256 hp and 373 tq with a stock intake, so the runners should give about 15 maybe 20 horses more.

You should definitley take him off the line with your suspension mods and since you say he cant drive you shouldn't have any problems staying ahead.

IROCZ28dan

the hp/tq numbers are going to vary with the tune...but yes the numbers with the engines are close...

ShiftyCapone

iTrader: (7)

How good is your tune? Is it perfectly dialed in with many many burns or is a it a mail order stab in the dark? If your car is not properly tuned I would give him the victory. The stock TPI is really holding that motor back. The day you switch it for another intake is the day you never lose to him.

IROCZ28dan

my tune will be the kind with numerous burns and such, datalogging, all that good stuff. Like I said the car isnt done yet. I will be going to my tuner, we will datalog for 10 minutes or so, and he will begin messing around until I find a tune that works. After break in...we will then proceed to the track to really fine tune it. Then he will burn me a 2nd chip to pass emissions.

I would agree on the top end half of it that he would beat me. But from a stoplight to another stop light, his top end doesnt have a chance to show its ugly head. And the TPI torque would carry me to victory wouldnt you say? Beings he has a 99 LS1...arent the 98-99 ones the poorer of the bunch? Also, his engine is beat to death. He still has his skipshift thing in place as well.

oh, and about the intake, when i get the funding (the engine swap dented me big time)...HSR for vortecs will be put on. nuff said.

TPI-454

Nuff said indeed!

ShiftyCapone

iTrader: (7)

All of the LS1's made about the same power. Remember the LS1 has wicked low end as well. They make 400lb ft and have an equaly impressive power curve. Your low end power curve should be right on par with his. An LS1's top end is just so mean that they appear to lack low end. Even a from a dig and LS1 can spin up in no time and put a hurtin on you if you aren't ready. If he had routine maintenance on his motor there shouldn't be anything wrong with it power wise. Lots of people keep the skip shift because it doesn't effect WOT performance.

Because your tune is not dialed in yet I wouldn't take him too lightly. You have a weight advantage but your set-up is not dialed in and your power curve will be compromised by the stock TPI. Remember, it takes an LT4 hotcam for an LT1 car to run with a stock LS1. You have a great combo started there and with a tune you should really see some serious improvements. That alone could put you easily in front of him. Without it though you just have some parts that your car isn't feeding correctly.

IROCZ28dan

yea...the tune will take place directly after the swap though...which is taking place right now. the LS1s ive seen with dyno numbers dont come close to 400 ft/lbs at the wheels...and ive seen similar combos on this board with guys who claim to have walked LS1s...so i guess ill see.

ShiftyCapone

iTrader: (7)

It will be close and I can't wait to read your posted results when it goes down. I was speaking of crank power numbers. Most M6 LS1's put down 300 to 330hp at the wheels equaling those same numbers with toque output as well. That is a solid 370 to 400 at the crank.

1989GTATransAm

iTrader: (3)

My combination puts down 304RWHP and 334RWT. A week ago I ran a 12.73@105.85 with 3/4 tank of gas. This is a fully loaded 1989 GTA with T-Tops and me weighing 250 pounds. TPI by the way.

If you are around 300RWHP this will give you and idea of what your car can do. If I had been smart and ran a 1/8 tank of gas I would have been in the high 12.6's. You should give the LS1 a real run for his money. Allen

IROCZ28dan

Mods? do you have emissions...ie do you still have your AIR?

what kinda traction did you have...and were you on slicks or anything?

urbanhunter44

iTrader: (3)

I think you've got him stop-light to stoplight, but as soon as you go faster than 60 or 70, he's going to walk you HARD. Your TPI dies out real quick, and LS1s only get stronger.

change your induction system, and you have him.

1989GTATransAm

iTrader: (3)

I still have air and the car is completely smog legal for California. I was running Mickey Thompson ET Street Radials at the track. No traction otherwise.

I drove 65 miles to the track. The only thing I did was change out the tires. I left the airfilter in place. Hopefully with a little tweaking here and there I will be in the 12.5's by the end of the year. Allen

stu

It drives me nuts seeing guys like you run those times with that trap speed. I mean I know I had almost the cheapest tires money could buy, but my best time was a 13.8 @ 106.86.

TPI-454

Yeah, torque does wonders...

stu

Well, I think it's more that my best 60' EVER was a 2.3.

TBI92Camaro

Wow stu, your tires must have REALLY sucked. I though my Eagles out back on the Stang sucked, consdiering Ill spin in 2nd gear....guess I found out someone has used ****tier tires than me

CamarosRUS

yea torque and street tires dont mix. a ran a 9.17 in the 1/8th which isnt anything to brag about but trapping 81 while doing so tells me i need traction....bad.

urbanhunter44

iTrader: (3)

Yikes. Yeah your ET/trap speed is wayyyy off. You musta had alot of wheel spin.

pasky

I have that problem too =/.

fly89gta

iTrader: (1)

lol@60-70K miles being a tired motor...it's just being broken in

Seriously though, should be a good race. You have a decent setup but your tune is gonna be key(as previously stated).

I'm interested to see the results

tpivette89

dont you think that statement is a bit extreme? my 93' Vette 6speed with only a K&N filter and the mufflers cut off trapped over 107mph. thats what a well driven stock LS1 is capable of

my brother in his stock 00' Z28 6speed and i raced from 40 to 110 several times and were ALWAYS door to door. then he added a lid and a catback and would beat me by a car and a half

fly89gta

iTrader: (1)

I think he's talking about fbody's

ShiftyCapone

iTrader: (7)

Nope. LT1 vettes run about even with LS1 cars as you mentioned. LT1 vettes are tremendously lighter and have a better exhaust than their f-body brother. When I would race my buds 02 SS in my old '95 Z I would get worked. A 50 to 125 roll would put him about 20 car lengths or more ahead of me. Most guys on CZ28 say after they can hang/beat M6 LS1 cars after a mild cam swap and some bolt ons. Based on the LS1 cars that I raced with my old LT1, I would say that statement is not too far off. Most stock LT1 f-bods only trap 100 to 102 as well. It would take a cam to even get close to the MPH of an M6 LS1 car.

I realize that there are bolt on LT1's running better ET's than LS1 cars but from a roll it takes a cam to hang with one in an F-body.

stu

Haha, you have no idea. Open differential+front wheel drive+ zero suspension mods+$50 14" tires+277 horsepower at the wheels+launching at around 4,500rpm to 5,000rpm = 2.3 60'



I think with slicks and like a 2.1 60' I could have done a 13.4 or something.

fly89gta

iTrader: (1)

With just a catback and a lid I trapped at 106.63...not too bad.

Once the headers, ypipe, ported TB and some PCM tuning get done I'm hoping to be around 109-ish.

1989GTATransAm

iTrader: (3)

Well my last time out at California Raceway there were maybe 20 4th gens. I only saw one that had a faster trap time than me and one with a 12.74 trap time with me at 12.73.

Now a lot of them had better speed at the 1320 mark but that is not what wins the race. Hehehe. Gotta love the TPI for the quick launch to get the car moving. Now if I could just get to line up with some instead of the ricers which I annihilate.

fly89gta

iTrader: (1)

Well, a 2.1 60' helps that high trap speed Damn stock tires lol

tpivette89

why would you think that? he said nothing specific towards an LT1 fbody... in fact, the quoted statement clearly said LT1 "cars"

true, they are heavy, but i cant see it being too much different... my Vette was a fully loaded 40th anniversary car. just about as heavy as you can get without being a vert. probably somewhere around 3400+lbs. MAYBE a 200lb difference compared to a LT1 fbody. also, the exhaust on a LT1 Vette sucks! they say its 2.75", but it necks down to almost 2.25" at certain points. and have you ever heard those mufflers? the damn car sounded like a sewing machine when you revved it until i cut the mufflers off. they HAD to be very restrictive


really? my brothers 00' Z28 with the same mods + a K&N filter trapped 110.51mph at Cecil last November. he ran a 12.90 with a 2.0X 60ft on that run. maybe your car is an auto? (your trans isnt listed in your sig) that would explain the mph difference

ShiftyCapone

iTrader: (7)

I am an idoit. I thought he had an LT1 car until I just read his sig and found out he had an LS1. His trap times are normal for an LS1 car. If he had an LT1 car with that trap speed he would be way above the norm.

fly89gta

iTrader: (1)

TPIvette...yeah auto car. I don't bother with 6-speeds. Once I get a converter(if I even bother) the car will be more fun, consistent and faster than a 6-speed car

fly89gta

iTrader: (1)

You're not an idiot, I quoted the wrong thing, that's what made you think I had a LT1