How much hp??????
Thread Starter
Pro
Joined: Feb 2006
Posts: 688
Likes: 0
From: Concord NC
How much hp??????
I got a 86 auto 112,000 miles on it, This summer once i can save up some $$$ I want to do some heavy mods. Rightnow ive got headers, flowmasters, true dual, no cats, air silencer removed, ect. most of the free/cheap stuff. LOL. Ok I plan on doing aluminum heads, cam, pistions and rods, rings, having the motor bored. Right now im pushing 380 or so at crank. Dont know all what has been done to the car. How much would I be expecting with all these mods done. Id really like to reach 500 on my L-98 
Ive thought about upgrading to a twin turbo??? Worthwhile, possible??? hp effects?
Ive thought about upgrading to a twin turbo??? Worthwhile, possible??? hp effects?
Safety Car
Joined: Sep 2001
Posts: 4,137
Likes: 531
From: Glenbeulah Wi
Originally Posted by C4driver99
I got a 86 auto 112,000 miles on it, This summer once i can save up some $$$ I want to do some heavy mods. Rightnow ive got headers, flowmasters, true dual, no cats, air silencer removed, ect. most of the free/cheap stuff. LOL. Ok I plan on doing aluminum heads, cam, pistions and rods, rings, having the motor bored. Right now im pushing 380 or so at crank. Dont know all what has been done to the car. How much would I be expecting with all these mods done. Id really like to reach 500 on my L-98 Ive thought about upgrading to a twin turbo??? Worthwhile, possible??? hp effects?
Ive thought about upgrading to a twin turbo??? Worthwhile, possible??? hp effects?To get 500 HP you will need to do a lot of work. In my sig I have the parts listed that gave me 500 HP at the crank.
Burning Brakes
Joined: Sep 2003
Posts: 875
Likes: 0
From: Louisville KY
if you want 500 at the crank on a N/A motor the stock TPI system has to go... and get a stealth ram, mini ram II, Superram, etc... You'd need a pretty decent cam with alot of duration and ~.600" lift or better. Heads will need at least 2.02"/1.6" (larger on the intake if possible). Heads also need to flow really well. I'd go with a 383 or better as well. Internals would be forged as well.
Now, I'd rather go FI if i was wanting 500+ out of a gen I chevy so I could have better drivability as well as more power under the curve and in a daily driver RPM range. For the TT setup, check this thread out...
http://forums.corvetteforum.com/show....php?t=1265554
A forged motor is a given with FI. Good luck in what ever you do!
Now, I'd rather go FI if i was wanting 500+ out of a gen I chevy so I could have better drivability as well as more power under the curve and in a daily driver RPM range. For the TT setup, check this thread out...
http://forums.corvetteforum.com/show....php?t=1265554
A forged motor is a given with FI. Good luck in what ever you do!
Thread Starter
Pro
Joined: Feb 2006
Posts: 688
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From: Concord NC
my buddy had it dynoed 
The previous owner mustve had some **** done to it i guess or the guy did not know how to operate the dyno which wouldnt surprise me. Ok great tips guess the L-98 is going bye bye 
Wasnt what i was looking for but i guess its something to work towards. BTW the air silencer is like a plastic bar that splits the air coming in at hte front of the radiator in all cars. Breaks the force down to keep it quieter. It takes like TOPS 3 horsepower but still horsepower adds up so its just two bolts and 5 minute uninstallation and i was bored again thanks everyone
The previous owner mustve had some **** done to it i guess or the guy did not know how to operate the dyno which wouldnt surprise me. Ok great tips guess the L-98 is going bye bye Wasnt what i was looking for but i guess its something to work towards. BTW the air silencer is like a plastic bar that splits the air coming in at hte front of the radiator in all cars. Breaks the force down to keep it quieter. It takes like TOPS 3 horsepower but still horsepower adds up so its just two bolts and 5 minute uninstallation and i was bored again thanks everyone
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Team Owner
Joined: Sep 2001
Posts: 62,097
Likes: 1,724
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Originally Posted by C4driver99
BTW the air silencer is like a plastic bar that splits the air coming in at hte front of the radiator in all cars. Breaks the force down to keep it quieter. It takes like TOPS 3 horsepower but still horsepower adds up so its just two bolts and 5 minute uninstallation and i was bored again thanks everyone
again thanks everyone
air silencer? Never have seen that!
Burning Brakes
Joined: Nov 2004
Posts: 781
Likes: 0
This is a pretty straight forward list for 525 HP (NA), but it is not going to be cheap.
383 with 6" rods and 11:1 compression
AFR or TFS 195 heads with .600" springs and 7/16 studs
Mini Ram intake with 58mm TB
TPIS ZZX cam with 1.6 rockers
Full length 1.75" coated headers
Aggressively tuned chip w/30 lb injectors
The heads might need a little bowl cleanup and some portmatching.
500 HP might be done with a 350 with more compression, 210 AFRs, bigger solid roller cam, and tuned for 7,000 RPM.
383 with 6" rods and 11:1 compression
AFR or TFS 195 heads with .600" springs and 7/16 studs
Mini Ram intake with 58mm TB
TPIS ZZX cam with 1.6 rockers
Full length 1.75" coated headers
Aggressively tuned chip w/30 lb injectors
The heads might need a little bowl cleanup and some portmatching.
500 HP might be done with a 350 with more compression, 210 AFRs, bigger solid roller cam, and tuned for 7,000 RPM.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Originally Posted by hippy
Yea vader, the n00b told you to chill.
I dunno, a set of headers on a 235hp L98 might add 145hp? Ya never know.
I dunno, a set of headers on a 235hp L98 might add 145hp? Ya never know.
Just joking around.