Going for more HP
Thread Starter
Pro
Joined: Oct 2003
Posts: 550
Likes: 0
From: Hesperia California
Going for more HP
I am considering having another motor built that will give me 400+ hp.
I have an 89 6sp, Z51 package.
My car is in great shape with most everything new.
My question is what am I looking at as far as computer, sensors, will I be able to use my TPI setup? I want this car to remain a Highway cruiser.
It is not a daily driver.
I tried Scan & Tune section with no response!
Thanks!
I have an 89 6sp, Z51 package.
My car is in great shape with most everything new.
My question is what am I looking at as far as computer, sensors, will I be able to use my TPI setup? I want this car to remain a Highway cruiser.
It is not a daily driver.
I tried Scan & Tune section with no response!
Thanks!
Team Owner
Joined: Sep 2001
Posts: 62,085
Likes: 1,724
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Sensors will not be an issue, but tuning will. So, you will need a custom chip burned to suit your heads/cam/intake changes.
Run searches in the archives for shorty headers, heads, and the Superram and Miniram. They should also contain rec's on cam choices.
In california, there is no legal longtube header, and the Superram is the only intake with CARB numbers.
Run searches in the archives for shorty headers, heads, and the Superram and Miniram. They should also contain rec's on cam choices.
In california, there is no legal longtube header, and the Superram is the only intake with CARB numbers.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Living on the Left Coast you will be severely restricted by CARB to a single exhaust system. The problem here is that your 400+hp motor will need 900cfm of exhaust flow and there is no single cat to do that. On top of that you cannot use LT headers to augment power development. You could have a custom exhaust installed with dual bullet cats in place of the stock pre cats and weld a 3" tube inside the stock cat to pass the visuals and the 3" pipe will flow over 800cfm.
With those restricitons, building a 383 or 396 would be the way to go. Then you might be able to use a modified TPI setup.
With those restricitons, building a 383 or 396 would be the way to go. Then you might be able to use a modified TPI setup.
Pro
Joined: May 2003
Posts: 682
Likes: 1
From: Annapolis MD
Originally Posted by 65Z01
Living on the Left Coast you will be severely restricted by CARB to a single exhaust system. The problem here is that your 400+hp motor will need 900cfm of exhaust flow and there is no single cat to do that. On top of that you cannot use LT headers to augment power development. You could have a custom exhaust installed with dual bullet cats in place of the stock pre cats and weld a 3" tube inside the stock cat to pass the visuals and the 3" pipe will flow over 800cfm.
With those restricitons, building a 383 or 396 would be the way to go. Then you might be able to use a modified TPI setup.
With those restricitons, building a 383 or 396 would be the way to go. Then you might be able to use a modified TPI setup.
so a decent size cammed 350 with supporting mods or a stroker to put you over the 400 chp and especially the 400 rwhp mark.
nitrous is alot cheaper if your short block is in good shape and is always another avenue to go especially in california.
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Originally Posted by Movnviolation
I am considering having another motor built that will give me 400+ hp.
I have an 89 6sp, Z51 package.
My car is in great shape with most everything new.
My question is what am I looking at as far as computer, sensors, will I be able to use my TPI setup? I want this car to remain a Highway cruiser.
It is not a daily driver.
I tried Scan & Tune section with no response!
Thanks!
I have an 89 6sp, Z51 package.
My car is in great shape with most everything new.
My question is what am I looking at as far as computer, sensors, will I be able to use my TPI setup? I want this car to remain a Highway cruiser.
It is not a daily driver.
I tried Scan & Tune section with no response!
Thanks!
The stock ECM is very capable of handling bigtime power.
The MAF you have now I have running on cars running as low as 10.2@133+ MPH on large 434 ci motors. He recently drove the car to Corvette's of carlisle and it got over 20MPG!
The ECMs are not the issue, its putting together a good solid combo that WILL perform that is the hard part. With that said, its best to find a combo like 85vet's that we did and copy it to a T.
His 383 SR combo last year, went 11.2 and was a perfect street cruiser. Another great street/strip combo is corvette0096s combo. It also a 383 with great power and street manners.
lots of them out there if you need any help locating these guys email me and I can point you to them or introduce you to them.
Intermediate
Joined: Aug 2004
Posts: 35
Likes: 0
From: manalapan new jersey
hey ski dwn it i was wounderin if you knew what that guy with the 383 stroker had in it like pistion rods etc... and wuts does he run because im looking to get into the 11's on my 92 auto.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer