View Poll Results: With my new mods what do you think my HP will be?
265 (current level)
2
14.29%
275
7
50.00%
285
2
14.29%
295
2
14.29%
305+
1
7.14%
Voters: 14. You may not vote on this poll
Guess my soon to be HP level!
08-20-2010, 06:40 PM
#1
Guess my soon to be HP level!
Alright I did a poll like this about a year ago, now its time for the update. My 91 GTA L98 had a confirmed 265 crank hp with stock shortblock, stock exhaust and then the following mods:
1-ZZ4 cylinder heads with no porting
2-PROM tune (very old and for 6000 ft altitude, now the car is at sea 3-level)
4-Ported plenum
5-Siamesed stock runners
6-Gasket matched base manifold
7-Airfoil
8-Cold air intake
9-TB coolant mod
10-Flowmaster 80 series muffler
......Again that was all good for 265 horsepower.
What is being updated:
1-Fresh tune for all adjustments
2-Hooker supercomp LTs to 3" true dual w/H pipe, dynomax bullets, dumped before the axle
3-Holley 58mm Throttle body
4-TPIS AFPR (Running 47PSI unless someone can tell me something better to do)
5-SLP Intake runners (2nd Gen)
6-Port match the Plenum (again)
7-1.6 Roller Rockers
With all that, to do...what do you think my new HP/TQ will be?
1-ZZ4 cylinder heads with no porting
2-PROM tune (very old and for 6000 ft altitude, now the car is at sea 3-level)
4-Ported plenum
5-Siamesed stock runners
6-Gasket matched base manifold
7-Airfoil
8-Cold air intake
9-TB coolant mod
10-Flowmaster 80 series muffler
......Again that was all good for 265 horsepower.
What is being updated:
1-Fresh tune for all adjustments
2-Hooker supercomp LTs to 3" true dual w/H pipe, dynomax bullets, dumped before the axle
3-Holley 58mm Throttle body
4-TPIS AFPR (Running 47PSI unless someone can tell me something better to do)
5-SLP Intake runners (2nd Gen)
6-Port match the Plenum (again)
7-1.6 Roller Rockers
With all that, to do...what do you think my new HP/TQ will be?
Last edited by F-Body Demon; 08-20-2010 at 06:44 PM.
You didnt mention changing the cam. You still have a small stock cam in there.
08-26-2010, 10:46 AM
#5
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Car: Trans Am, Corvette
Engine: LB9, LT1
Transmission: 700R4, 4L60
Axle/Gears: 373, 259
08-27-2010, 11:15 AM
#6
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Car: 88 GTA "Cocaine"
Engine: 350 tpi
Transmission: 700r4
Axle/Gears: 3.27
Re: Guess my soon to be HP level!
I was thinking about the cam as well
the 1.6 rockers may be good for about 5-7 hp
the 1.6 rockers may be good for about 5-7 hp
08-27-2010, 02:30 PM
#7
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Car: 1988 Flame Red Trans am GTA
Engine: Forged 355 4 Bolt, FIRST TPI
Transmission: 700r4
Axle/Gears: ls1 torsen 3.42 gear
Re: Guess my soon to be HP level!
i dont think that those zz4 heads are much of an upgrade from the stockers... the new mods you did basically moved your powerband up.... that 58mm tb most likely didnt help anything... slp runners are little gains unless you port them out...... you made it sound alot meaner with the exhaust upgrades and made it breathe alot better but other than that you probably will only feel sent of pants difference...
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08-27-2010, 07:39 PM
#8
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Car: 1988 Camaro
Engine: 383 Stroker
Transmission: Probuilt 700 R4
Axle/Gears: 3.73
Re: Guess my soon to be HP level!
I would guess around 275. When do you take it the dyno for the final test?
08-29-2010, 12:33 AM
#9
Re: Guess my soon to be HP level!
To tell you the truth I was kinda afraid of changing the cam because the engine has 160k on it and I didn't want to spin it past 5500 rpm. You guys think its that good of an idea? I was figuring that some good 1.6 rocker arms could cure my cam problem. I know its a band aid but at least I can re-use the rocker arms later when I drop in the 406 (its in a different state waiting on heads....and the car)
08-29-2010, 04:03 AM
#10
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Car: 88 GTA "Cocaine"
Engine: 350 tpi
Transmission: 700r4
Axle/Gears: 3.27
Re: Guess my soon to be HP level!
are you capable of doing a cam swap
if so then get a cam out of like a zz4 or something where they take the cam out and replace it with something radical in a new shortblock
those types of cams go for cheap on ebay
just reuse your lifters and get new valvesprings
golden untill she blows
if so then get a cam out of like a zz4 or something where they take the cam out and replace it with something radical in a new shortblock
those types of cams go for cheap on ebay
just reuse your lifters and get new valvesprings
golden untill she blows
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