Dyno numbers!!!!! (LT4 hotcam)
#1
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Car: '91 GTA
Engine: 402ci LS2
Transmission: faceplated T56
Axle/Gears: 9" w/ 4.11's
Dyno numbers!!!!! (LT4 hotcam)
Well I finally got to makes some runs on the dyno with a wideband o2 hooked up. I made 3 pulls, all within a few hp of each other. Here aremy numbers:
275rwhp and 330rwtq
My motor is:
STOCK crank, rods, and pistons(not balanced)
stock heads, gasket matched w/ polished combustion chambers
TPIS ZZ9 valve springs
Comp 1.6's
siamesed intake base
STOCK runners
STOCK 48mm TB
ported plenum
24# LT1 injectors
LT4 hotcam
good wires, ignition, coil, MSD, etc
LT headers w/ 3" exhaust
*I think thats about all that I have on it. What do you guys think about my numbers? I just started tuning the chip in it, and my o2 readings were good all the way until about 5k rpms, then it leaned out a little. Other than that I'm pretty satisfied. I can't wait to get my LT1 intake on and some good heads.
275rwhp and 330rwtq
My motor is:
STOCK crank, rods, and pistons(not balanced)
stock heads, gasket matched w/ polished combustion chambers
TPIS ZZ9 valve springs
Comp 1.6's
siamesed intake base
STOCK runners
STOCK 48mm TB
ported plenum
24# LT1 injectors
LT4 hotcam
good wires, ignition, coil, MSD, etc
LT headers w/ 3" exhaust
*I think thats about all that I have on it. What do you guys think about my numbers? I just started tuning the chip in it, and my o2 readings were good all the way until about 5k rpms, then it leaned out a little. Other than that I'm pretty satisfied. I can't wait to get my LT1 intake on and some good heads.
Last edited by GTA91; 04-27-2003 at 11:34 PM.
#2
Pretty damn good for stock heads, only 30 hp away from LS1 territory! I'd love to see someone dyno 300 rwhp with stock L98 heads. Everyone knows they suck, but I want to push them to the limits and see what they're really capable of before I throw them away.
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Car: '91 GTA
Engine: 402ci LS2
Transmission: faceplated T56
Axle/Gears: 9" w/ 4.11's
Originally posted by esams
Pretty damn good for stock heads, only 30 hp away from LS1 territory! I'd love to see someone dyno 300 rwhp with stock L98 heads. Everyone knows they suck, but I want to push them to the limits and see what they're really capable of before I throw them away.
Pretty damn good for stock heads, only 30 hp away from LS1 territory! I'd love to see someone dyno 300 rwhp with stock L98 heads. Everyone knows they suck, but I want to push them to the limits and see what they're really capable of before I throw them away.
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Car: 1990 Iroc-Z
Engine: L98
Transmission: 700R4
Oh I think you'll pass 300RWHP with an LT1 intake and a carefully burned prom... IMO 300RWHP with your mods and then the LT1 intake/new tune, is a conservative estimate.
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Car: '91 GTA
Engine: 402ci LS2
Transmission: faceplated T56
Axle/Gears: 9" w/ 4.11's
Originally posted by D Stroy H8
Oh I think you'll pass 300RWHP with an LT1 intake and a carefully burned prom... IMO 300RWHP with your mods and then the LT1 intake/new tune, is a conservative estimate.
Oh I think you'll pass 300RWHP with an LT1 intake and a carefully burned prom... IMO 300RWHP with your mods and then the LT1 intake/new tune, is a conservative estimate.
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Car: 87 aniv vert, 90 Iroc, 87 LT
Engine: LB9, LB9, carbed 305
Transmission: MM5, MM5 conversion, MM5 conversion
Axle/Gears: 3.45, 3.73, 3.73
sweet man...
youll easily hit 300 with the LT1 intake. You need some different heads though, L98's suck
youll easily hit 300 with the LT1 intake. You need some different heads though, L98's suck
#9
That's pretty good. I think with some prom tuning and with a bigger TB and bigger/siamesed/ported runners you should reach 300 RWHP. I believe Kevin91Z has the alum L98/ZZ4 heads and with a TPIS manifold, bigger runners and ported plenum, and SLP 1-3/4" headers he's pulling 310-320 RWHP. The intake is probably choking you so far. What's the dyno graphs look like?
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Car: '91 GTA
Engine: 402ci LS2
Transmission: faceplated T56
Axle/Gears: 9" w/ 4.11's
Originally posted by SQUIRLEYMOFO
I have yet to see the impressive gains the LT1 intake promises....
I have yet to see the impressive gains the LT1 intake promises....
#11
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Car: '91 GTA
Engine: 402ci LS2
Transmission: faceplated T56
Axle/Gears: 9" w/ 4.11's
Originally posted by 90iroc5spd
sweet man...
youll easily hit 300 with the LT1 intake. You need some different heads though, L98's suck
sweet man...
youll easily hit 300 with the LT1 intake. You need some different heads though, L98's suck
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Car: '91 GTA
Engine: 402ci LS2
Transmission: faceplated T56
Axle/Gears: 9" w/ 4.11's
Originally posted by 91Z28-350
That's pretty good. I think with some prom tuning and with a bigger TB and bigger/siamesed/ported runners you should reach 300 RWHP. I believe Kevin91Z has the alum L98/ZZ4 heads and with a TPIS manifold, bigger runners and ported plenum, and SLP 1-3/4" headers he's pulling 310-320 RWHP. The intake is probably choking you so far. What's the dyno graphs look like?
That's pretty good. I think with some prom tuning and with a bigger TB and bigger/siamesed/ported runners you should reach 300 RWHP. I believe Kevin91Z has the alum L98/ZZ4 heads and with a TPIS manifold, bigger runners and ported plenum, and SLP 1-3/4" headers he's pulling 310-320 RWHP. The intake is probably choking you so far. What's the dyno graphs look like?
#14
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My expereince with the Miniram the one time I used it was very positive. In cars with similar weight and gearing I swapped the EXACT SAME long block- heads. cam, etc. and went from 13.0 @ 108 to 13.0 @ 111, with the second car being more traction limited. Boy did the Miniram rip on the top end versus the old carbureted dual-plane intake setup (which was thoroughly dialed in by yours truly to the Nth degree)!
Had the LT-1 intake swap been available at the time we probably would have done that instead of the Miniram- it's a pricey sucker!
Had the LT-1 intake swap been available at the time we probably would have done that instead of the Miniram- it's a pricey sucker!
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Car: '91 GTA
Engine: 402ci LS2
Transmission: faceplated T56
Axle/Gears: 9" w/ 4.11's
Thanks for the compliments guys!
Yes I'm using the batronix burner with WinXP and it works just fine. No problems at all!
Miniram, sweet but expensive....
LT1 intake, pretty nice and cheap....
Yes I'm using the batronix burner with WinXP and it works just fine. No problems at all!
Miniram, sweet but expensive....
LT1 intake, pretty nice and cheap....
#17
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Car: 85&95 Trans am
Engine: 85-LT1 95-LT1
Transmission: 4l60e & 4l60e
Axle/Gears: 3.23 & 3.23
Great numbers man. Can't wait to get my 85 done. I'm thinking I'm going to go with the lt1 intake on mine as well.
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Car: '91 GTA
Engine: 402ci LS2
Transmission: faceplated T56
Axle/Gears: 9" w/ 4.11's
Originally posted by rdog30
Great numbers man. Can't wait to get my 85 done. I'm thinking I'm going to go with the lt1 intake on mine as well.
Great numbers man. Can't wait to get my 85 done. I'm thinking I'm going to go with the lt1 intake on mine as well.
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Car: 91 Z28
Engine: Forged 383
Transmission: Pro-built 700R4
It'll be cool if you do the lt-1 swap and post your gains on the dyno. It will be even cooler when you then swap your stock heads for a set of AFR/Trickflow's and post the gains on the dyno from that. I think you'll be around 350-360 rwhp after those two mods, since you're good with chip-burning. At least I've seen about 360-370 hp from lt-4's with hot cams on the corvetteforum.
Good Luck!
Good Luck!
#20
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Car: '91 GTA
Engine: 402ci LS2
Transmission: faceplated T56
Axle/Gears: 9" w/ 4.11's
Originally posted by camarojoe
It'll be cool if you do the lt-1 swap and post your gains on the dyno. It will be even cooler when you then swap your stock heads for a set of AFR/Trickflow's and post the gains on the dyno from that. I think you'll be around 350-360 rwhp after those two mods, since you're good with chip-burning. At least I've seen about 360-370 hp from lt-4's with hot cams on the corvetteforum.
Good Luck!
It'll be cool if you do the lt-1 swap and post your gains on the dyno. It will be even cooler when you then swap your stock heads for a set of AFR/Trickflow's and post the gains on the dyno from that. I think you'll be around 350-360 rwhp after those two mods, since you're good with chip-burning. At least I've seen about 360-370 hp from lt-4's with hot cams on the corvetteforum.
Good Luck!
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