C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

What mods?

Thread Tools
 
Search this Thread
 
Old Aug 14, 2005 | 10:52 AM
  #1  
GrandSportC3's Avatar
GrandSportC3
Thread Starter
Team Owner
 
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Default What mods?

What mods could I do to my '68 to make it even faster?

One of the things that I'm thinking in getting is the Aerospace front brake setup which takes 50 lbs off the front..which should also reduce the ET a little bit... I could also go with a chromoly trans crossmember which would take even more weight off...

I really can't think of any more performance mods that I could do, except for a dominator carb...
I'm planning on adding a 150 shot of nitrous in wnter, but I still want to do some more mods before that.. but I can't think of anything...
Reply
Old Aug 14, 2005 | 12:02 PM
  #2  
chevymans 77's Avatar
chevymans 77
Melting Slicks
Supporting Gold
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2002
Posts: 2,717
Likes: 121
From: Sulphur LA
St. Jude Donor '05-'06,'11,'13-'14,'16,'18,'19,'24, '25
Default

Did you find your electrical problem? Make the car as light as possible. Have you had the car dyno tuned? Indexing spark plugs, fuel additives, put ice on the intake right before a run.

Neal
Reply
Old Aug 14, 2005 | 12:03 PM
  #3  
PatsLs1vette's Avatar
PatsLs1vette
Le Mans Master
20 Year Member
 
Joined: Jul 2001
Posts: 9,622
Likes: 16
From: absecon nj
Default

getting the transmission straightened out so it shifts where you need it
Reply
Old Aug 14, 2005 | 12:07 PM
  #4  
GrandSportC3's Avatar
GrandSportC3
Thread Starter
Team Owner
 
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Default

Originally Posted by chevymans 77
Did you find your electrical problem? Make the car as light as possible. Have you had the car dyno tuned? Indexing spark plugs, fuel additives, put ice on the intake right before a run.

Neal
I'll have the car dyno tuned in fall.. However, I'm pretty sure that I'm very close to where I'm supposed to be.. The spark plugs looked beautiful after my last track visit.. The electrical problem isn't fixed but the car is running again.. I'll still have to figure out what wire caused the problem and bypass that connection..
I doubt that fuel additives would help considering that I'm using 110 octane leaded fuel at the track..

Last edited by GrandSportC3; Aug 14, 2005 at 12:18 PM.
Reply
Old Aug 14, 2005 | 12:08 PM
  #5  
Twin_Turbo's Avatar
Twin_Turbo
Race Director
25 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Dec 1999
Posts: 16,945
Likes: 9
Default

remove lights and hardware
remove bumpers and brackets
remove front frame extension and make your own lightweight one
replace front suspension with something lighter
buy a blower and nitrous
Reply
Old Aug 14, 2005 | 12:08 PM
  #6  
GrandSportC3's Avatar
GrandSportC3
Thread Starter
Team Owner
 
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Default

Originally Posted by patsnitrovette
getting the transmission straightened out so it shifts where you need it
I'm gonna do that this coming week if I'll get a chance.. I'll actually put the old governor back into the car but I'm going to change out the spring...
Reply
Old Aug 14, 2005 | 12:10 PM
  #7  
PatsLs1vette's Avatar
PatsLs1vette
Le Mans Master
20 Year Member
 
Joined: Jul 2001
Posts: 9,622
Likes: 16
From: absecon nj
Default

i agree with marck,try and lighten it up a light as you can
Reply
Old Aug 14, 2005 | 12:12 PM
  #8  
GrandSportC3's Avatar
GrandSportC3
Thread Starter
Team Owner
 
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Default

Originally Posted by Twin_Turbo
remove lights and hardware
remove bumpers and brackets
remove front frame extension and make your own lightweight one
replace front suspension with something lighter
buy a blower and nitrous
The lights and hardware have very little weight and won't make a difference.. They are less than 10 lbs..
I could take the bumpers off.. That should give me about .02 or so...
I have no fabrication skills.. so #3 won't happen... at least for a while..
I have been looking for lightweight a-arms but haven't found anything.. The a-arms are definetlye heavy and there's a huge weight savings potential.. I will however have to stay with coil springs vs. lightweight composite spring for the front because composite springs will not give me enough weight transfer to hook up. Any links etc. for lightweight a-arm assemblies would be appreciated..
I'll probably add nitrous in winter, but my compression ratio is too high for a blower.. I could only run very little boost..
Reply
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
Old Aug 14, 2005 | 12:16 PM
  #9  
GrandSportC3's Avatar
GrandSportC3
Thread Starter
Team Owner
 
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Default

Originally Posted by patsnitrovette
i agree with marck,try and lighten it up a light as you can
I think that I could get the car down to about 2600 lbs... Lower than that would be difficult..

I'd have to replace all crossmembers with chromoly crossmembers, use lightweight front brakes, remove bumpers etc..

I also could go with a lightweight battery, eliminated the alternator and brackets etc...
Reply
Old Aug 14, 2005 | 12:35 PM
  #10  
chevymans 77's Avatar
chevymans 77
Melting Slicks
Supporting Gold
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2002
Posts: 2,717
Likes: 121
From: Sulphur LA
St. Jude Donor '05-'06,'11,'13-'14,'16,'18,'19,'24, '25
Default

We ran Max Race Fuel in our outboards and it worked very well. It contains Nitro Methane with a propane carrier to help it mix with gasoline I will have to lookup their web site and post it they had some good info on their site.
Here is the link: http://www.pricechemical.com/max_race.htm
Neal

Last edited by chevymans 77; Aug 14, 2005 at 01:03 PM.
Reply
Old Aug 14, 2005 | 12:38 PM
  #11  
MotorHead's Avatar
MotorHead
Race Director
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Default

I think your money would be best spent on dyno tuning, do you know what your A/F ratio is ? How do you know the motor is dialed in properly, you could be leaving 50HP on the table right now
Reply
Old Aug 14, 2005 | 12:51 PM
  #12  
lostpatrolman's Avatar
lostpatrolman
Melting Slicks
10 Year Member
 
Joined: Feb 2004
Posts: 2,435
Likes: 0
From: largo florida
Default

For the uppers, I believe VBP makes soem tubular ones. Jim Meyer Racing also has uppers that they sell with their kit. They might sell them individually if you ask. I was able to get them to sell me just the lowers from their kit. Talk to them through email first though.

Reply
Old Aug 14, 2005 | 12:57 PM
  #13  
Twin_Turbo's Avatar
Twin_Turbo
Race Director
25 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Dec 1999
Posts: 16,945
Likes: 9
Default

I was going to suggest just that, those look to be extremely light, about as light as you can get. Would be nice to have the lower ones but then w/ a spring pocket added since O wants to keep the stock coil setup.
Reply
Old Aug 14, 2005 | 01:42 PM
  #14  
Mr. Wonderful's Avatar
Mr. Wonderful
Race Director
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2000
Posts: 10,061
Likes: 266
From: Slower than a speeding bullet................ Fort Lauderdale, FL
Default

Originally Posted by GrandSportC3
What mods could I do to my '68 to make it even faster?
Go on a diet and lose 50 lbs. Cheaper than any mod
Reply
Old Aug 14, 2005 | 01:53 PM
  #15  
jcswm's Avatar
jcswm
Melting Slicks
 
Joined: Jan 2004
Posts: 2,527
Likes: 1
From: St. Petersburg, Fl///Columbus, Ohio
Default

Originally Posted by Mr. Wonderful
Go on a diet and lose 50 lbs. Cheaper than any mod

replace glass with lexan
remove interior, install lightweight drivers seat & dash
lighter top???
carbon fiber front end???
Helium in tires
Reply
Old Aug 14, 2005 | 01:56 PM
  #16  
lostpatrolman's Avatar
lostpatrolman
Melting Slicks
10 Year Member
 
Joined: Feb 2004
Posts: 2,435
Likes: 0
From: largo florida
Default

What about the front spindles? That whole assembly is so heavy. Are there any aluminum units that would fit?
Reply
Old Aug 14, 2005 | 02:01 PM
  #17  
jcswm's Avatar
jcswm
Melting Slicks
 
Joined: Jan 2004
Posts: 2,527
Likes: 1
From: St. Petersburg, Fl///Columbus, Ohio
Default

I just did a google search on steel tube frames.... looks like you could drop some major lbs!!!
Reply

Get notified of new replies

To What mods?

Old Aug 14, 2005 | 02:02 PM
  #18  
427Hotrod's Avatar
427Hotrod
Race Director
25 Year Member
Liked
Loved
Top Answer: 5
 
Joined: Jan 2000
Posts: 13,018
Likes: 2,262
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Default

Flush mounted Lexan windows since you're racing more than streeting these days.
Lighter steering column assy.
Aluminum master cylinder and light brake components you're talking about.
Completely block off radiator opening and air coming into engine compartment except scoop.
Seal scoop to carb with an aluminum base plate.
Open up back of hood/cowl area to make sure no air is trapped under hood. This helps keep nose down at speed.
Drop nose down to bump stops while at rest.
Play with high gear timing retard.
I'm really looking for what MPH does in cooler weather. Still looks a little off potential to me.
Still not sure on 3/8" fuel lines, bigger is good insurance, especially when you start spraying.
Go ahead and plan on 200-250hp N20 hit.
Plastic fuel cell?
Very small aluminum race radiator..sell regular one. Less water is lighter weight too!
I like light control arm idea
Check into an aluminum manual rack and pinion set up
Look for someone to replicate your bumpers in chromed plastic.
Use Royal Purple "0" weight REAL race oil for the banzai runs. This is NOT to leave in for a long time, but it will help turn the number..guaranteed! Not street oil..RACE oil.
Gotta get those shift points up there.
Set the valves!!
Many small blocks respond to 1.65-1.7 rockers on the outboard cylinders only. That's 4 intake rockers, doesn't cost much.
There are some fuel additivces that will actually increase power, not just resist detonation
Seriously consider whacking heads to get to 13.0 compression with .015 gaskets and go to alcohol. Cheaper than gas, even if you do use twice as much. If you're racing, it just makes sense.

I'll keep trying to think of more....


JIM
Reply
Old Aug 14, 2005 | 02:04 PM
  #19  
Jack71's Avatar
Jack71
Drifting
 
Joined: Sep 2001
Posts: 1,427
Likes: 1
From: Boxford Mass
Default

I heard that seats from 78+ are much lighter than the older styles.
Reply
Old Aug 14, 2005 | 02:08 PM
  #20  
ngcolby's Avatar
ngcolby
Pro
 
Joined: Aug 2004
Posts: 732
Likes: 1
From: Green Lake Wisconsin
Default

Start drilling holes...
If it's not necesssary for the car to function, remove it...i.e. interior, dash, e-brake, extra wiring, that heavy dash...
Replace as much stuff as possible with aluminum and other alternative lightweight materials.
Tube frame?
250 shot of nitrous.
solid rocket boosters under the back bumper
switch to alcohol and up your compression to 17:1

well..ok...maybe not on the last couple...but 2lbs, 3lbs, 6lbs, 10lbs, 3lbs, 5lbs all adds up to almost 30lbs...keep whittling it down...its adds up.
Reply



All times are GMT -4. The time now is 10:36 AM.

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