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

Heads and cam!

Thread Tools
 
Search this Thread
 
Old Jun 2, 2009 | 11:49 PM
  #21  
jimg's'93's Avatar
jimg's'93
Drifting
 
Joined: Nov 2005
Posts: 1,324
Likes: 5
From: Charlotte NC
Default

Originally Posted by aboatguy
Cheap Reliable Fast Pick two



Good luck! and don't forget supporting mods (bigger cam often needs a stall for a4 and gears or just gears for manual)

A quality tune costs almost your entire budget and if you end up making big power you are guaranteed to find the next weak link in your car. Roaching the tranny can easily eat 1200 bones. A Precision industries Vigilante converter will eat your entire budget.




Used parts may be your answer but I'd save my money until I had about four times your current budget, since grenading your short block will take about double your current budget just to fix the short block, its better to have an oh schitt fund if you have a toy.

Remember a good rule of thumb is figure out what you want to do, price each part IOT get and estimate and then double or triple it and you may end up in the ball park, especially with a 170K project.

Sell your old 46X double humps they are not as good as a more modern aluminum head.

It actually looks to me like no one is trying to bust your chops they are trying to save you some heart ache.

If your budget really is 3 digits and you really really have to dig into something, I agree with the suggestion that you change your valve springs and seals and leave the rest of the money alone for the OHHH SCHITT fund.
Mike
fully!
Reply
Old Jun 3, 2009 | 12:23 AM
  #22  
Noobster's Avatar
Noobster
Burning Brakes
 
Joined: Mar 2008
Posts: 1,030
Likes: 1
From: My Give A Dams Busted The Bend Me Over State N.J
Default

Reply
Old Jun 3, 2009 | 12:30 AM
  #23  
JimiHendrix's Avatar
JimiHendrix
Drifting
15 Year Member
All Eyes On Me
Liked
Loved
 
Joined: Jul 2007
Posts: 1,294
Likes: 37
Default

If you can get good used heads and cam, you might be able to squeeze it out . . .but, if I were you. I'd just freshen it up with new valve springs and seals and perhaps get some exhaust mods, a performance cam and 1.6 rockers and call it a day. it will sound better, move a lil quicker.
Reply
Old Jun 3, 2009 | 12:39 AM
  #24  
reoch999's Avatar
reoch999
Pro
10 Year Member
 
Joined: Apr 2008
Posts: 542
Likes: 0
From: middle of Illinois
Default

Ok, I'm posting this because I can relate to your situation. I had a camaro project car for my main transportation in college a few years ago and I have to agree with the guys saying reliability should be goal number one right now.

As for the heads/cam budget... I'm in the middle of a heads/cam deal on my 92 vette right now. I didn't buy new heads, I had my old ones refurbed and finally tried something I've always been curious about, head porting. Anyway, the real reason for my post is to show you a real world parts list for a heads/cam project with real world pricing. My target was $1500.

PS, I swear if you show my wife I'll hunt you down.

Cam swap parts list

Description, part # Price
Valve springs CC914 $120.00
Retainers CC941 $55.00
Hedman street hedders HED-68440 $160.00
.021 head gasket SCE-011062LT $88.00
Subtotal $423.00

3000 stall 9.5” torque converter $550.00
Subtotal $550.00

Cryo treated Strange 3.73:1 Dana 36 $650.00
Subtotal $650.00

PCMFORLESS custom chip program $204.00
Subtotal $204.00

1.94/1.50 swirled back cut valves $160.00
Machine work, recondition heads $368.00
Subtotal $528.00

LT1 cap & rotor MSD 4381 $140.00
Taylor 8.2mm plug wires $69.00
CSR Electric Water Pump $184.00
Royal Purple 75W90 gear oil (2 qts) $36.00
Royal Purple Dex III ATF (5 qts) $65.00
Royal Purple 5w30 Engine Oil (5 qts) $40.00
ARP LT-1 cylinder head bolts $86.00
Shipping $12.00
LT1 MSD blaster coil $43.00
Hardened pushrods $32.00
Subtotal $706.00

Axle & Drive Shaft Universal joints (3) $60.00
Timing Chain $20.00
Subtotal $80.00

Total Purchased $3141.00

Last edited by reoch999; Jun 3, 2009 at 12:44 AM. Reason: spelling/grammar
Reply
Old Jun 3, 2009 | 01:00 AM
  #25  
reoch999's Avatar
reoch999
Pro
10 Year Member
 
Joined: Apr 2008
Posts: 542
Likes: 0
From: middle of Illinois
Default

Just looking back over that list, I know there are several parts not on it. Locks for the valve spring retainers, valve spring shims, gaskets & sealant, break in lube, oil to use during break in, trans filter & gasket, oil pump shaft... So, probably a couple hundred bucks worth of "oh yeah" stuff I left off the list.
Reply
Old Jun 3, 2009 | 01:03 AM
  #26  
ch@0s's Avatar
ch@0s
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
Default

Originally Posted by reoch999
Just looking back over that list, I know there are several parts not on it. Locks for the valve spring retainers, valve spring shims, gaskets & sealant, break in lube, oil to use during break in, trans filter & gasket, oil pump shaft... So, probably a couple hundred bucks worth of "oh yeah" stuff I left off the list.
the "oh yeah" stuff cost the most
Reply
Old Jun 3, 2009 | 02:15 AM
  #27  
pearlvett's Avatar
pearlvett
Thread Starter
Racer
 
Joined: Feb 2008
Posts: 435
Likes: 0
From: Bulverde TX
Default

Thanks for the input im probably just goin to do heads just to stop my valve seals from leaking so i dont have to deal with the smoke haha. I just need it to be a little more reliable so i can make it through the first couple of years!
Reply
Old Jun 3, 2009 | 02:39 AM
  #28  
383vett's Avatar
383vett
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
Default

Originally Posted by pearlvett
Thanks for the input im probably just goin to do heads just to stop my valve seals from leaking so i dont have to deal with the smoke haha. I just need it to be a little more reliable so i can make it through the first couple of years!
Good choice. Go to school, make some $$$, and mod like crazy.
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 Jun 3, 2009 | 03:00 AM
  #29  
mrc24x's Avatar
mrc24x
Burning Brakes
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2005
Posts: 1,172
Likes: 9
From: '88 TPI L98/HotCam Powell, Ohio
Default

If you are looking for more power just spend the 650 on headers/exhaust.

Reply
Old Jun 3, 2009 | 08:20 AM
  #30  
bjankuski's Avatar
bjankuski
Safety Car
20 Year Member
Photogenic
Liked
Top Answer: 1
 
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
Default

Originally Posted by 383vett
113 heads with the 58cc chambers would result in a high compression ratio with the flat top pistons he had now on the 85. Not a good idea. The cam numbers are in the right area. To the original op; it doesn't make sense to change heads and cam and not change routine parts like the water pump, hoses and belt. Just removing 170,000 mile hoses will probably tear them. You have to think about reliability at this point. If you are going to use the car as transportation at college, make sure everything is in good solid shape and you will be happier in the long run. Getting stuck on the side of the road at night with a blown hose is not fun.
FYI, This will yield approximately 10.3 to 1 compression which is OK. Assumptions are .04 head gasket, pistons .02 in the hole, 58cc head, flat top piston with 6cc valve reliefs.
Reply
Old Jun 3, 2009 | 08:37 AM
  #31  
RacerX70CC's Avatar
RacerX70CC
Melting Slicks
10 Year Member
 
Joined: Nov 2004
Posts: 2,799
Likes: 2
From: Cape Coral FL
Default

Originally Posted by pearlvett
Thanks for the input im probably just goin to do heads just to stop my valve seals from leaking so i dont have to deal with the smoke haha. I just need it to be a little more reliable so i can make it through the first couple of years!
Do your budget (and more importantly... your car) a favor:

Buy a set of valve seals and valve cover gaskets and just replace the seals.

Save your money to do a heads/cam swap the RIGHT way... You'll be money ahead, not to mention you won't be "bubba-fying" your engine with old dinosaur used heads. That is, if you want it to be reliable (as reliable as a 170K Vette can be).

Best of luck to you
Reply
Old Jun 3, 2009 | 08:46 AM
  #32  
c-4 lhozwalte's Avatar
c-4 lhozwalte
Racer
 
Joined: May 2009
Posts: 421
Likes: 2
From: van buren ar
Default

pull your heads have them surfaced.port match intake and head.and get some 1.6rr which improves the valve event and reduces friction.
Reply
Old Jun 3, 2009 | 08:49 AM
  #33  
mrc24x's Avatar
mrc24x
Burning Brakes
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2005
Posts: 1,172
Likes: 9
From: '88 TPI L98/HotCam Powell, Ohio
Default

I forgot to mention, my L98 had 196,000 miles on it when I decided it should be replaced/rebuilt (just because). I pulled it apart and it still looked great. If it's not making any noise from the bottom don't worry about it. These TPI engines rarely see more than 4600 rpm which seems to make them last forever.
Reply
Old Jun 3, 2009 | 09:48 AM
  #34  
tmichaud's Avatar
tmichaud
Advanced
 
Joined: Nov 2008
Posts: 85
Likes: 1
Default

Originally Posted by c-4 lhozwalte
pull your heads have them surfaced.port match intake and head.and get some 1.6rr which improves the valve event and reduces friction.


If you are fixing valve seals (I'm doing the same) It would be timely to put in new springs and 1.6 rockers while you are there. Others that have done that seem to say between 10-20hp from this.

Pulling the heads is quite a bit more work - but If you are not afraid of the effort - you can get a good look inside to see where you stand, and port matching - perhaps a basic bowl blend would help!!!.
Reply
Old Jun 3, 2009 | 09:49 AM
  #35  
joe3906's Avatar
joe3906
Drifting
10 Year Member
 
Joined: Oct 2004
Posts: 1,976
Likes: 0
From: Patchogue NY
Default

Originally Posted by aboatguy
Cheap Reliable Fast Pick two



Good luck! and don't forget supporting mods (bigger cam often needs a stall for a4 and gears or just gears for manual)

A quality tune costs almost your entire budget and if you end up making big power you are guaranteed to find the next weak link in your car. Roaching the tranny can easily eat 1200 bones. A Precision industries Vigilante converter will eat your entire budget.




Used parts may be your answer but I'd save my money until I had about four times your current budget, since grenading your short block will take about double your current budget just to fix the short block, its better to have an oh schitt fund if you have a toy.

Remember a good rule of thumb is figure out what you want to do, price each part IOT get and estimate and then double or triple it and you may end up in the ball park, especially with a 170K project.

Sell your old 46X double humps they are not as good as a more modern aluminum head.

It actually looks to me like no one is trying to bust your chops they are trying to save you some heart ache.

If your budget really is 3 digits and you really really have to dig into something, I agree with the suggestion that you change your valve springs and seals and leave the rest of the money alone for the OHHH SCHITT fund.
Mike
I didn't do the above, now I have to go back in and change the valve seals, as I'm losing oil with the old one' I didn't change. Actually, I relied on what I thought was a mechanic who knew how to swap out a cam. That's the "Oh no" type things that will bite you in the a--, when you try to go to "CHEAP." Best of luck, and don't say we didn't try to warn you.

Joe B.
Reply
Old Jun 3, 2009 | 11:36 AM
  #36  
engle1147's Avatar
engle1147
Le Mans Master
Supporting Lifetime
 
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
Default

Originally Posted by pearlvett
Thanks for the input im probably just goin to do heads just to stop my valve seals from leaking so i dont have to deal with the smoke haha. I just need it to be a little more reliable so i can make it through the first couple of years!
The car will last a couple of years if you just stay on top of the basic maintenance and fluids...you don't have to baby it....do the mods you opened the thread up with down the road. Good luck with the schooling.
Reply
Old Jun 3, 2009 | 12:37 PM
  #37  
Ryan59's Avatar
Ryan59
Drifting
 
Joined: Mar 2008
Posts: 1,756
Likes: 0
From: Wichita KS
Default

You will need intake gaskets, The Right Stuff gasket maker for intake ends, an oil pan gasket, timing chain cover gasket and valve cover gaskets. Valve springs to match cam lift. Valve guide seals. new lifters for the used or new cam. Timing chain & gears. There are other incedentals like spark plugs, plug wires, 2-oil filters and enough oil for two changes. After cam break-in you have to change the oil and want fresh oil to break in the cam. With that many miles you may end up changing the distributor gear as well. To get the most out of that cam, you'll want to run roller rockers. And you might wanto use 7/16 rocker studs for strength over 3/8th studs for the stiffer springs. Then you'll need valve spring retainers, guides and hardened pushrods.

The top end of an engine is the most expensive part. I have purchaced all the above and probably have $2500 invested so far and haven't purchased plugs, oil & filters yet. I had to buy a few tools as well that I hadn't planned on. Best thing to do is save up and buy everything you will need for the job before starting in on it.
Reply

Get notified of new replies

To Heads and cam!

Old Jun 3, 2009 | 03:10 PM
  #38  
pearlvett's Avatar
pearlvett
Thread Starter
Racer
 
Joined: Feb 2008
Posts: 435
Likes: 0
From: Bulverde TX
Default

Originally Posted by mrc24x
I forgot to mention, my L98 had 196,000 miles on it when I decided it should be replaced/rebuilt (just because). I pulled it apart and it still looked great. If it's not making any noise from the bottom don't worry about it. These TPI engines rarely see more than 4600 rpm which seems to make them last forever.
This is reassuring! I am just goin to rebuild my heads and while thats being done me and my dad are goin to do some research and maybe throw in a cam! I havent heard any noise from the bottom end so this should be safe right?
Reply
Old Jun 3, 2009 | 03:22 PM
  #39  
ch@0s's Avatar
ch@0s
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
Default

Originally Posted by pearlvett
This is reassuring! I am just goin to rebuild my heads and while thats being done me and my dad are goin to do some research and maybe throw in a cam! I havent heard any noise from the bottom end so this should be safe right?
that sounds like a good plan
fix the problem and get your cam too
Reply
Old Jun 3, 2009 | 03:32 PM
  #40  
pearlvett's Avatar
pearlvett
Thread Starter
Racer
 
Joined: Feb 2008
Posts: 435
Likes: 0
From: Bulverde TX
Default

Thanks for all of your help everyone i know now what i am doing and it is all from the help of my fellow vetters! I am excited to get my car running better plus i will still be the only person at my school with a corvette!
Reply



All times are GMT -4. The time now is 11:30 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