C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

400hp

Thread Tools
 
Search this Thread
 
Old Feb 11, 2005 | 11:37 PM
  #1  
x-raydave's Avatar
x-raydave
Thread Starter
Advanced
 
Joined: Jun 2004
Posts: 81
Likes: 0
From: Suring Wisconsin
Default 400hp

Just sold 89 6speed 40,000 miles FX3 to someone who would
like to get 400 RWHP. Car was dyno'ed at 228RWHP. Car is stock
except K&N and Cat back Stainless exhaust (BB). No super
charging or Gas please. Buyer has @ 5-8,000 to spend and does
not want to buy a stroker, but modify existing engine. Suggestions?
Possible? Anyone done this? Links? ect. would be greatly
appreciated. This is a project that needs to be done within 8-10
weeks, as car is then being shipped to London, England.
Thanks, in advance. I know I'll get some great ideas here to
present to new owner and then relay to mechanic who is doing
the work.
Reply
Old Feb 12, 2005 | 12:03 AM
  #2  
1991Z07's Avatar
1991Z07
Safety Car
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2000
Posts: 4,562
Likes: 106
From: Austin Texas
Default

Originally Posted by x-raydave
Just sold 89 6speed 40,000 miles FX3 to someone who would
like to get 400 RWHP. Car was dyno'ed at 228RWHP. Car is stock
except K&N and Cat back Stainless exhaust (BB). No super
charging or Gas please. Buyer has @ 5-8,000 to spend and does
not want to buy a stroker, but modify existing engine. Suggestions?
Possible? Anyone done this? Links? ect. would be greatly
appreciated. This is a project that needs to be done within 8-10
weeks, as car is then being shipped to London, England.
Thanks, in advance. I know I'll get some great ideas here to
present to new owner and then relay to mechanic who is doing
the work.
VERY doable...

Follow the link to my web site and go to "Recipe for a 400 HP L98" Has P/N's used, what we did, headwork done, cam, etc.

I actually have over that now...picked up about 25 HP when we did the last rebuild.

Time needed to get it done is a little tight, but if all the parts are available in a few weeks, you should have no problems getting the thing done.

The chip will be the last thing to do. Find someplace where you can chassis-dyno tune the car. After that take it on the road and capture data under different conditions then have them tweak the tune until it is right.

Mine is a HOOT to drive. One of my employees took a ride with me, and I smoked the tires through 4th. He just sat back and could not believe the torque the motor makes. Puts a smile on my face every time I drive it...

Good luck!
Reply
Old Feb 12, 2005 | 12:18 AM
  #3  
vader86's Avatar
vader86
Team Owner
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2001
Posts: 62,067
Likes: 1,723
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Default

AFR 190 heads, LPE Superram and 74219 cam, Hooker 2149 or 2151 1-3/4" headers, that should get over 400 at the crank.
Reply
Old Feb 12, 2005 | 01:29 AM
  #4  
65Z01's Avatar
65Z01
Team Owner
20 Year Member
 
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Default

With a 6-speed 400hp at the road will take about 470hp at the crank.

I don't believe that can be done with a NA 350cid.

Convince your client to settle for 400hp at the crank, which is easy to do, or go for a stroker.
Reply
Old Feb 12, 2005 | 08:02 AM
  #5  
mean8t's Avatar
mean8t
Racer
20 Year Member
 
Joined: May 2001
Posts: 472
Likes: 0
From: Tampa Bay Area
Default



Either go with a 383 or a supercharger or settle for 400 at the crank
Reply
Old Feb 12, 2005 | 12:22 PM
  #6  
ralph's Avatar
ralph
Le Mans Master
25 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Feb 1999
Posts: 6,170
Likes: 11
From: somers, ny
Default

you aint gett'n 400 at the rear wheels with a NA 350 without giving up a lot of drivability and forget emissions if that's a concern. you can get a 350 over 500hp at the crank with a enough compression and cam & heads, but i wouldn't want to drive it on the street.

They just reviewed a budget 383 that made over 500hp in one of the mags (hot rod or pop hot rod) and even that was pushing the edge of streetability. Their cost was 6500 w/o labor, block or machine work using iron heads.

Last edited by ralph; Feb 12, 2005 at 12:24 PM.
Reply
Old Feb 12, 2005 | 04:37 PM
  #7  
SurfnSun's Avatar
SurfnSun
Team Owner
All Eyes On Me
Loved
Community Favorite
Top Answer: 3
 
Joined: Aug 1999
Posts: 24,010
Likes: 632
St. Jude Donor '10
Default

if he wants a relaible 400rwhp car he needs a built bottom end, good heads and a blower. I think there was a procharger here for sale for 2500 not too long ago...don't know if it sold or not.
Reply

Get notified of new replies

To 400hp





All times are GMT -4. The time now is 09:24 AM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE