Gears or heads?
Burning Brakes
Joined: Jul 2006
Posts: 1,080
Likes: 2
From: Pittsburgh PA
No they didnt make much of a difference. .05 if that. The cold air and alittle more seat time gained 3 tenths
Like said even in hot air the hsr out the box beat tpi's best.
Now a full bolt on big base tpi system on stock motor also works well with great power gains. Just pointing out short runners even on stock motors still work very well
Like said even in hot air the hsr out the box beat tpi's best.
Now a full bolt on big base tpi system on stock motor also works well with great power gains. Just pointing out short runners even on stock motors still work very well
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
No they didnt make much of a difference. .05 if that. The cold air and alittle more seat time gained 3 tenths
Like said even in hot air the hsr out the box beat tpi's best.
Now a full bolt on big base tpi system on stock motor also works well with great power gains. Just pointing out short runners even on stock motors still work very well
Like said even in hot air the hsr out the box beat tpi's best.
Now a full bolt on big base tpi system on stock motor also works well with great power gains. Just pointing out short runners even on stock motors still work very well
I still have a LTR intake on my 383. Its gone 11.8x at 113, but I'm pretty sure the intake is holding me back at this point. I'm fairly certain with no other change than an intake (HSR, MR, or SR) it would go low 11s. I'd love to do it, but I really don't want to put a cage in the car.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
I disagree. My L98 made substantial power gains with a stealth ram swap on stock L98.
It had headers, converter and 3.42's already. In ice cold air the stock tpi went 13.63 at 97.
Nothin more than hsr swap and thats it it went 13.52 in mid summer air. I got that car down to 13.2's in cold air with underdrive pulleys. Thats a near half second gain in just intake in similar air conditions. Added drag wheels for 70lb reduction and 1.6 rockers and aggressive timing curve it went 12.95 at 104
Best tpi 60 ft was 1.75-1.76. Hsr went 1.70-1.71 same converter and stall. Shorter runners still make low end power
Intake on stock L98 picks up alot. If you have ported heads and cam the gains are even more pronounced
Adding better heads plus intake even more power with whatever cam is in it
It had headers, converter and 3.42's already. In ice cold air the stock tpi went 13.63 at 97.
Nothin more than hsr swap and thats it it went 13.52 in mid summer air. I got that car down to 13.2's in cold air with underdrive pulleys. Thats a near half second gain in just intake in similar air conditions. Added drag wheels for 70lb reduction and 1.6 rockers and aggressive timing curve it went 12.95 at 104
Best tpi 60 ft was 1.75-1.76. Hsr went 1.70-1.71 same converter and stall. Shorter runners still make low end power
Intake on stock L98 picks up alot. If you have ported heads and cam the gains are even more pronounced
Adding better heads plus intake even more power with whatever cam is in it
http://xtremecarzone.com.au/index.php?showtopic=386
As long as you drive a quarter mile only short runner is fine. If you actually drive the car on the street it is not.
Melting Slicks
Joined: Nov 2013
Posts: 2,264
Likes: 3
From: Orchard Park NY
I still have a LTR intake on my 383. Its gone 11.8x at 113, but I'm pretty sure the intake is holding me back at this point. I'm fairly certain with no other change than an intake (HSR, MR, or SR) it would go low 11s. I'd love to do it, but I really don't want to put a cage in the car.
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
Trust me, I'm very happy with the way the car runs considering the modest budget when I built it. I'm just pointing out that a TPI style intake has its limitations. People with nearly identical builds to mine are making 50+ more HP, at the wheels, with only a different intake.
Burning Brakes
Joined: Jul 2006
Posts: 1,080
Likes: 2
From: Pittsburgh PA
Here's the proof:
http://xtremecarzone.com.au/index.php?showtopic=386
As long as you drive a quarter mile only short runner is fine. If you actually drive the car on the street it is not.
http://xtremecarzone.com.au/index.php?showtopic=386
As long as you drive a quarter mile only short runner is fine. If you actually drive the car on the street it is not.
Ls1 doesnt make as much torque as a L98 yet its significantly quicker on the street in all aspects and at the track. Never heard anyone complain about ls1's lol. My hsr l98 made 315 wtq. My bolt on ls1 made 320. Short runner L98 makes an lt1/Ls1 powerband.
Torque does not rule the streets as much as everyone thinks. Tpi is very nice and fun, but actually can be too much torque. It doesnt take much to move a 3300-3400 lb car. Just my experience
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Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Well try both and get back to me. I am telling you its not a huge difference and a short runner is fine on the street. I rather get more bang for my buck in power production than just make a torque value
Ls1 doesnt make as much torque as a L98 yet its significantly quicker on the street in all aspects and at the track. Never heard anyone complain about ls1's lol. My hsr l98 made 315 wtq. My bolt on ls1 made 320. Short runner L98 makes an lt1/Ls1 powerband.
Torque does not rule the streets as much as everyone thinks. Tpi is very nice and fun, but actually can be too much torque. It doesnt take much to move a 3300-3400 lb car. Just my experience
Ls1 doesnt make as much torque as a L98 yet its significantly quicker on the street in all aspects and at the track. Never heard anyone complain about ls1's lol. My hsr l98 made 315 wtq. My bolt on ls1 made 320. Short runner L98 makes an lt1/Ls1 powerband.
Torque does not rule the streets as much as everyone thinks. Tpi is very nice and fun, but actually can be too much torque. It doesnt take much to move a 3300-3400 lb car. Just my experience
I also have an 04 6spd LS1, and comparing the 2 is apples and oranges, because the LS is just faster period.
Instructor
Joined: Aug 2012
Posts: 248
Likes: 63
From: Matamata, NZ
In the same boat
I am the same wondering what to do next. Have an 89 that I only use on the strip for fun, down to 13.28 @ 104mph, and thinking about going to 3.7's but keep hearing the Dana 36 wont take it. And the L98 bottom end is at it's limit running over 5500rpm. I have an RPM manifold with 650 Carb.
Melting Slicks
Joined: Nov 2013
Posts: 2,264
Likes: 3
From: Orchard Park NY
I think the stock bottom end is plenty fine at 5500rpms being that you have a carb. The only real limitation to the rpm's is the stock LTR's. The dana 36 is supposed to be pretty tough too, just nowhere near as tough as the dana 44.
Instructor
Joined: Aug 2012
Posts: 248
Likes: 63
From: Matamata, NZ
When I ran the 13.2 I was going to 6500 which is where the intake and cam (hot lt4) is meant to run to but am concerned about the bottom end. Excuse my ignorance, what is LTR's?
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs