Hey I the topic ov TPI vs. Ls1 or Lt1 has been talked about to death in here, but I just wanted to know if anyone here with TPI Long Tube RUNNERS has ever beaten or produced better HP and torque #'s then Ls1 or Lt1. I know that the tpi with long runners are good for low end Torque and rpm dies out around 4500 to 5000, But there has to be someone with a tpi t/a or camaro with long tube runners that has taken out a 4th gen. in 1/4 mile or from stop light to stop light. If so, give me some feed back and let me know what kind of combo u have. Thanks,

 

i had spanked a few lt1's that were kinda stock... basic bolt ons... cold air free mods and what have u.... and beat alot of ls1's with spray and had the ltr set up loved it... and only had 3.08 gears mods should be in sig

 

Cool, but im trying to see if anyones done it without spray, but thats pretty impressive for a 305. Maybe you can PM mcwille for me and let him know what kind of spray set up you have. I know hes trying to install NOS on his TPI. Anyone else have any stories or a combo setup w/ a 350 tpi that took on the Lt1's and Ls1's?

 

My setup will probably be capable of taking a LT1 on and winning easily once its tuned properly. I don't know about LS1 cars but the heads have decent port work, the cam is just about perfect for a upgraded/ported intake, and I have a full exhaust.

People tell me I should be able to match a LT1 car with my car as is, no tuning. I haven't really been able to drive it much though. Still has issues to sort out before I push it hard.

The LT1 and LS1 engines have a few advantages over L98/LB9 cars. LT1 and LS1 heads flow significantly more from the factory over any TPI heads, including the aluminum heads included on the Vettes. The intake manifolds on LT1/LS1 cars flow much more than a TPI car. The advantage really doesn't show up until about 4,500rpm though. Anything below 4,500rpm and the LT1/ls1 are only slightly behind the L98's power numbers, the LS1 less so. Where TPI dies out though, both LT1 and LS1 intakes continue to provide lots of air to feed the engine at higher revs, this gives them a big advantage.

Modifed TPI cars can match and exceed the numbers produced by LT1/LS1 cars in stock form. But the better flowing cylinder heads, and higher flowing intakes will give the LT1/LS1 motors the advantage one bolt-ons come in to play. Quite simply, bolt on for bolt on the LT1/LS1 platforms will gain more power than a TPI car will. So the TPI will fall behind.

Once you start getting into heads/cam mods though, and HSR/Mini-ram intakes for SBC engines its an even playing field for power production.

 

I have beaten an LT1 on the street with my new vortec LTR setup. I also ran just as fast as a LS1 at the track. I ran a 13.51 and the LS1 ran a 13.56 so I would say I'm just as fast as a stock LS1 but any modded out LS1 would spank me pretty good! Lt1's seem to be pretty easy for me to walk all over on the street at lights. Freeway of course they beat me cause of the none exesitant airflow up in higher rpm's. But I have honestly beaten both Lt1 and LS1's

Check out the current mods on the cardomain site and I have a post about my LT1 race somewhere on the racin board!

BTW the only reason I beat these cars is cause of the rear wheel tq numbers but my RWHP is poor...243rwhp/343rwtq

Jason

 

never been done, impossible

 

beating lt1's were on motor... the ls1's i sprayed on.... and when i dynoed my car it was 190 hp and 273 lbs of torque on motor never sprayed on the dyno.... and the nitrous kit i used was a 5115... i belive it was for a f0rd rustang... it was the nos kit and just had the pills flipped........if i ever sprayed on an lt1 i would walk him hard... but on motor i was like a fender ahead of him.....also i sprayed on any import i could find just to **** him off lol

 

You're claiming to have beaten an LT1 car with 190rwhp? Maybe against a crappy driver..

 

At the races this summer, I raced a '94 LT1 Camaro with a 5.7 and headers, 6 speed and throttle body.

In the 1/8th mile I beat him by a tenth.

LB9GTA

 

ive kept up with a new ss on the streeet but after about 60 he started to pull away all i got is vortec motor with stock runners lt4 cam and 3.45 gears i was shifting at about 4500 to 5000 but then again i only ran a 14.45 at 97 on the strip so take it for what its worth

 

Cool, i havent see you on in a while, Did u ever get your engine tuned? I remember you werent happy with the rhp #'s and alot of people suggested you get a good tune and you should see a difference.

 

my tpi runs mid 12's.. AFR 190's LPE cam, ford svo30lb injectors, slp headers, custom chip, yada ydad yada. BEat an ls1 vett at the track last year.

 

i'm not running a long tube runner setup but I running with LS1's using my stock heads and cam. I'm turning a best to date of 13.21@104.6 (no power adder)with the mods listed below....but like stated above the same mods on an LS1 would smoke me...

 

Yea I played with my fuel pressure a lil bit, brought it down to about 47 psi instead of 52psi and I do notice a lil bit of a difference. I really havent driven it muc lately cause I've been finishing the dash up. The reason I havent bought any new parts was that I'm goin a whole different route that doesnt include a TPI set-up any more.

I go back to the track tomorrow to see if it improves at all, but im hopin with the better psi I should be a lil better tuned.

Jason

 

yes i beat an lt1 with 190 rear wheel hp.... ITS ALL HOW U DRIVE AND GET IT TO THE GROUND.... they had an auto... and like i said the one i raced on motor.... was fairly stock.... in a 1/4 mile bet he would have had my lunch.. but as listed in the first post light to light as well.... and i got him every time.... got a few actually...... but on spray i was a beast

 

9 out of 10 say at a stoplight the l98 as what it takes to beat an lt1. After a few modtd, mostly to the intake an l98 can have no problem walkin an lt1 in the 1/4. Now compare an LS1 to an L98. For how powerful an LS1 is its tq numbers are not as low in its RPM band compared to the L98. A modded L98 with stock heads/cam can take an LS1 off the line. However at the 1/8 the LS1 is in its powerband and will walk past the l98. I know this cause it happened on SLP day to weeks ago when i ran. The hp is so much higher than an L98, and the problem is keeping in the confines of 350 CI with no power adders it takes a lot of good parts matchiing to come up with a motor that is streetable, and can dominate over modded LS1. Thank heavens for strokers, blowers and the like. Makes the job a little easier. Now we have to contend with LS2's soon.

 

Cool,!! I like the responses Keep them coming

 

yea.. A Speed Density L98 3.23 vs a Lt1 2.73, the L98 will win easily esp from a stop. Seen it happen to many times, the L98 pretty underated

 

Well I went back, and ran a 13.45 @100.35! I almost was able to race a ZO6 but instead I raced a fullsized k1500 chevy. I wanted to see how much the ZO6 would beat me.

 

you dont think a mass air flowed L98 would be able to the same or better?

 

Most people seem to agree that a MAF L98 is a tenth or two slower than a SD L98.

Most of the really fast stock L98's I've seen have been SD L98's. My own 89 GTA's L98 doesn't count because before i modded it it had a reman motor with TBI heads, and a peanut cam.

 

Ive heard its better to install a bigger cam with a mass air flow system then a SD system because the computer tries to compensate more with the SD system.

 

depends, like mentioned, usually Speed Density ran couple tenths of a second better then MAF. I heard MAF are better response with modifications then Speed Density

 

With all of my mods my car still idles damn decent, and infact about 650rpm out of gear, and about 500 to 550 in gear.

Amazed that will all of the things done to the motor it idles just fine. Its not perfect, but it works pretty well.

 

I would expect that a nicely tuned TPI car against a nicely tuned LT1 car, the TPI car would beat the LT1 in the 1/8 mile, while losing in a 1/4 mile drag race.

Both of the above cars would lose big time to an LS1. My '99 SS made 319 RWHP and 330 Ft-Lbf torque on a chassis dyno and ran 13.2s in the 1/4 mile with very simple mods; gutted MAF, flow lid, air filter, 4.10 gears, and tuning by the MAF translator.

I have done heads/cam headers and more on both cars and with the stock bottom end for both cars, the L98 made about 270 RWHP (12.9 sec ET), while the LS1 made 400 RWHP (12.2 sec ET). The LS1 should actually turn high 11s, but I'm traction limited. These times are with the same MT ET Streets.

Most recently, I took the L98 (ZZ4 block) out to 395 cu.in., and the car makes 340 RWHP and 370 Ft-Lbf, this is a very big disappointment to me. Too much money to gain 70 RWHP.