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

Need Advice - Pistons, Computer, ignition?

Thread Tools
 
Search this Thread
 
Old Jan 18, 2005 | 12:57 AM
  #1  
Draven's Avatar
Draven
Thread Starter
Le Mans Master
20 Year Member
All Eyes On Me
Liked
Top Answer: 1
 
Joined: Jul 2004
Posts: 7,163
Likes: 61
From: NH
St. Jude Donor '14
Default Need Advice - Pistons, Computer, ignition?

Around March 1st, my car goes into the shop for my build:

Intake:

Superram plenum, runners, edlebrock base all port matched, 52mm TB

Set of 113s have been ported/polished to 2" intake, 1.6" exhaust.

30lb Delphi injectors (I know, bigger then they have to).

EM 1 5/8ths LT headers, Y pipe, hooked up to my current Flowmaster exhaust (gonna be loud) ; )

SR 219 CAM, Comp Cam 1.6 RRs, new roller lifters...

Now, that said... I was thinking about bolting those parts up to my stock 350. The builder ( a member on the forum ) has made some suggestions, due to the lack of emissions here and eliminating the EGR, as well as the air pump eliminator pulley, etc.

NOW.. I was wondering what else would be recommended for my build. I was thinking of going with pistons (but didn't know if I should leave that in case I wanted to work the bottom end later)...

I was thinking of a computer, but also realize that the member doing my build is taking care of tuning at the same time.. Wasn't sure if I would gain anything moving away from the stock to an aftermarket..

Now, probably the most important... How about ignition systems? Am I taking a risk (or losing anything) with sticking with the stock system?

Thanks for your time, guys,

-Joe
Reply
Old Jan 18, 2005 | 01:18 AM
  #2  
bogus's Avatar
bogus
Team Owner
25 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Default

How many miles are on the engine? If it's over 100k, I would get the bottom end looked at.

Considering you are making a huge bump in power, the rings and bearings should be looked at.

It really isn't going to cost much more than that.
Reply
Old Jan 18, 2005 | 01:36 AM
  #3  
cv67's Avatar
cv67
Team Owner
15 Year Member
 
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Default

If you have it stripped that fardown, might as well do it. Would be a good opportunity to replace other items such as oil and coolant hoses, etc,-Small stuff that is hard to access once its all together. Plus you wont be wincing if your'e getting on it with an old bottom end.
Reply
Old Jan 18, 2005 | 01:41 AM
  #4  
bogus's Avatar
bogus
Team Owner
25 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Default

oh, ignition... I really don't know enough about GM Ignitions to know if after market is really any better.
Reply
Old Jan 18, 2005 | 01:55 AM
  #5  
JCAIRE2's Avatar
JCAIRE2
Le Mans Master
 
Joined: Jun 2002
Posts: 6,097
Likes: 0
From: High Plains Drifter Fayetteville, AR
Default

GM HEI is good up to about 6K rpm, so unless you plan on spinning higher than that, I wouldn't look to ignition right now. Unless you're going to N2O.
Reply
Old Jan 18, 2005 | 02:26 AM
  #6  
85 500 horse's Avatar
85 500 horse
Melting Slicks
15 Year Member
 
Joined: Dec 2004
Posts: 2,954
Likes: 2
From: Obama=death for America
Default

Weisco forged pistons are a very good choice and for what you are doing, I'd do it. I'd also go with the Weisco moly rings.
Reply
Old Jan 18, 2005 | 07:36 AM
  #7  
Draven's Avatar
Draven
Thread Starter
Le Mans Master
20 Year Member
All Eyes On Me
Liked
Top Answer: 1
 
Joined: Jul 2004
Posts: 7,163
Likes: 61
From: NH
St. Jude Donor '14
Default

Originally Posted by bogus
How many miles are on the engine? If it's over 100k, I would get the bottom end looked at.

Considering you are making a huge bump in power, the rings and bearings should be looked at.

It really isn't going to cost much more than that.
40k miles...


Originally Posted by cuisinartvette
If you have it stripped that fardown, might as well do it. Would be a good opportunity to replace other items such as oil and coolant hoses, etc,-Small stuff that is hard to access once its all together. Plus you wont be wincing if your'e getting on it with an old bottom end.
Any complete kits you / anyone would help. : )

-Joe

Originally Posted by 85 500 horse
Weisco forged pistons are a very good choice and for what you are doing, I'd do it. I'd also go with the Weisco moly rings.
I'll run that by the builder. Tell ya where we end up. So far, I'm getting a no go on another computer (which I figured), ignition is good to 6k (which was what I was comfortable revving to anyway.. Don't want to push it), and a set of pistons would be something to think about.

-Joe
Reply
Old Jan 25, 2005 | 05:03 PM
  #8  
Draven's Avatar
Draven
Thread Starter
Le Mans Master
20 Year Member
All Eyes On Me
Liked
Top Answer: 1
 
Joined: Jul 2004
Posts: 7,163
Likes: 61
From: NH
St. Jude Donor '14
Default

Alright, from what I understand, stock compression is right around 9.5:1. I'd like to bump it up to around 10.5:1 (I run high octane anyway, and this should be safe.)

Any recommend some pistons with some p/ns?

Thanks,
Joe
Reply

Get notified of new replies

To Need Advice - Pistons, Computer, ignition?

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo




All times are GMT -4. The time now is 08:51 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE