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

Supercharged motor build

Thread Tools
 
Search this Thread
 
Old Dec 22, 2011 | 05:30 PM
  #1  
Bjh's Avatar
Bjh
Thread Starter
Racer
10 Year Member
 
Joined: Aug 2010
Posts: 376
Likes: 1
From: POQUOSON va
Default Supercharged motor build

Over the past 7 months my father and I have rebuilt my 1988 corvette. In place of the worn l98; we built a splay capped 355ci with forged components. Internals: Forged steel Eagle crank, Forged Lunati rods, Forged SRP dished pistons. The cam in the car is a comp cams cam (Specs: Lift 560 total, Duration 239 at 50/290 total). We chose GM Fast Burn heads, Lunati solid lifters, comp cams ultra pro magnum rockers. The intake of choice for this build was a TPIS mini ram, but the budget called for a TPIS tpi intake (changing intake in the future).

Started with the tear down of the car.

Very dirty engine bay

splay caps


machine work


long block complete


After we finished the long block we moved on to replacing the front and rear bushings.



Prepped the engine bay for its new motor. Then the engine was hoisted in along with the tranny (The transmission is a richmond 6 speed, we used a dual mass centerforce clutch) .



Transmission and driveshaft were tight end up.


The intake and accessories were installed.


We modified the headers by bending them a little to allow for spacers that we cut from a lathe. The longer bolts made it easier to work on and insured that the header bolts wouldn't fall out.


We pieced together the exhaust using 3in exhaust tubing and 3in slip fir 90s. (will upload photo soon)

We then started wiring up the wide band o2, boost guage, and tach.

My father played around with the chip. We got it to start after a couple of computer runs. Heres a Video of the car idling. We are still in the process of tuning it. The car is lean in the video. (I tried uploading the vid put it didn't let me).

http://www.youtube.com/watch?v=zc6W8...ature=youtu.be


After letting the car idle for a few mins, I took a look under the car...... Coolant was slowly leaking from a couple head studs. The ARP "recommended" sealant was proving to not work. We are going to have to take the exhaust and header back off to get to the head bolts.

Last edited by Bjh; Dec 24, 2011 at 10:56 PM.
Reply
Old Dec 24, 2011 | 04:27 PM
  #2  
BrianCunningham's Avatar
BrianCunningham
Team Owner
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2001
Posts: 30,846
Likes: 293
From: Boston, Dallas, Detroit, SoCal, back to Boston MA
Default



What blower are you plan on running?
Reply
Old Dec 24, 2011 | 10:11 PM
  #3  
Bjh's Avatar
Bjh
Thread Starter
Racer
10 Year Member
 
Joined: Aug 2010
Posts: 376
Likes: 1
From: POQUOSON va
Default

I plan on running my old setup, which was a V1 vortech. I am most likely to run meth injection to compensate for the added heat. But for now I am going to run the motor N/A until I get about 1200-1500 miles on it. Then I want to get a track time N/A, with nitrous, and with the blower. I am hoping the head unit will be able to keep up with the motor.
Reply
Old Jan 5, 2012 | 07:09 PM
  #4  
Bjh's Avatar
Bjh
Thread Starter
Racer
10 Year Member
 
Joined: Aug 2010
Posts: 376
Likes: 1
From: POQUOSON va
Default Update

Finished re-installing all 32 head studs. It's almost back to where it was. We are re-adjusting the valves, before we start it back up. Hope to have a vid of the car going down the road in the next few days.
Reply
Old Jan 7, 2012 | 09:07 AM
  #5  
Teme_76's Avatar
Teme_76
Heel & Toe
 
Joined: Jun 2005
Posts: 18
Likes: 0
Default

Looks quite similar than my project, except mine is 383 and AFR heads. Why you didn't like those black Proforms?
Reply
Old Jan 7, 2012 | 01:47 PM
  #6  
Bjh's Avatar
Bjh
Thread Starter
Racer
10 Year Member
 
Joined: Aug 2010
Posts: 376
Likes: 1
From: POQUOSON va
Default

I loved the black pro forms, but i didn't know when i bought them that they had hairline cracks. When i installed them the cracks were obvious. I guess thats why they were so cheap on ebay, but they made for good installation valve covers
Sounds like sweet build, What head unit are you going to run?

UPDATE: Started the car back up again. We are still in the process of tuning. We can't get the afr in the correct spot yet. The car is either to fat or lean. I was in contact with a guy on the forum that was a good tuner, but i lost his contact.

Last edited by Bjh; Jan 7, 2012 at 01:52 PM.
Reply
Old Jan 11, 2012 | 12:00 PM
  #7  
Teme_76's Avatar
Teme_76
Heel & Toe
 
Joined: Jun 2005
Posts: 18
Likes: 0
Default

I have now P600B, but I think that I'll change it to D-1. But anyway I'll try first with P600B...
Reply
Old Feb 18, 2012 | 08:58 PM
  #8  
Bjh's Avatar
Bjh
Thread Starter
Racer
10 Year Member
 
Joined: Aug 2010
Posts: 376
Likes: 1
From: POQUOSON va
Default

UPDATE: Put about 400 miles on the motor so far. Hard to get a chance t drive it in the winter. We have decided to go the turbo route and sell the charger. We are going to design and make a rear mounted turbo setup with an intercooler in the rear. Also, we changed to tpis headers because the other headers formed some leaks.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Joe Kucinski
story-1

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

 Joe Kucinski
story-2

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

 Verdad Gallardo
story-3

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-4

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-5

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-6

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-7

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-8

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

 Michael S. Palmer
story-9

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
Old Mar 4, 2012 | 02:02 PM
  #9  
chevymayne7's Avatar
chevymayne7
1st Gear
 
Joined: Mar 2012
Posts: 1
Likes: 0
Default

where can i find a supercharger for my 87 corvette l98? i cant find one anywhere.. a brand would helpp:/
Reply
Old Mar 4, 2012 | 06:31 PM
  #10  
Bjh's Avatar
Bjh
Thread Starter
Racer
10 Year Member
 
Joined: Aug 2010
Posts: 376
Likes: 1
From: POQUOSON va
Default

Brands: Vortech, ATi or procharger, power dyne, paxton, and probably more. Check their web sites. We just sold two kits here on the forum just in the past few weeks.

Thanks, Brandyn
Reply

Get notified of new replies

To Supercharged motor build





All times are GMT -4. The time now is 09:46 AM.

story-0
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-1
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-2
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
story-3
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-4
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-5
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-6
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-7
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-8
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-9
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE