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

Cam question

Thread Tools
 
Search this Thread
 
Old Sep 9, 2004 | 08:02 AM
  #1  
micks69's Avatar
micks69
Thread Starter
Burning Brakes
15 Year Member
 
Joined: Aug 2001
Posts: 1,160
Likes: 3
From: Greensboro NC
Default Cam question

After running my newly rebuilt engine for a whopping 400 miles my cam seems to be wiped and I need a new one. BTW: Comp XE268h

How do I determine which one of the 50 billion different types of cams to choose?

468/Original intake/KB 9.5:1 pistons/Q-Jet/Original Iron heads with enlarged Intake valves/used for fun driving no serious competion and I'd like it to idle.
Reply
Old Sep 9, 2004 | 08:12 AM
  #2  
Ganey's Avatar
Ganey
Race Director
10 Year Member
 
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Default

Mick

The cam is the engine's mechanical program. You need to say more about what you want like how did you like the cam you had, do you want more upper power, etc. & what's exhaust?
I see you have a 4spd.
Reply
Old Sep 9, 2004 | 08:23 AM
  #3  
micks69's Avatar
micks69
Thread Starter
Burning Brakes
15 Year Member
 
Joined: Aug 2001
Posts: 1,160
Likes: 3
From: Greensboro NC
Default

I didn't like anything about the previous cam because the car never quite ran right with it and now its scrap after only 400 miles.

My exhaust uses std manifolds w/2.5 inch chambered exhaust. I'd like good low to mid range torque don't care about hi-RPM HP #'s since I'll never go there. Just fun driving with the occasional trip to the track/drag and road course.
Reply
Old Sep 9, 2004 | 08:36 AM
  #4  
Ganey's Avatar
Ganey
Race Director
10 Year Member
 
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Default

XE-268 is 224 230 duration @ .050 110LS. Sounds like you would like something like Comps 270H which is 224 224 110LS & not more than the 280H which is 230 230 110LS. More could be run, but that's not what you want.
Reply
Old Sep 9, 2004 | 08:43 AM
  #5  
micks69's Avatar
micks69
Thread Starter
Burning Brakes
15 Year Member
 
Joined: Aug 2001
Posts: 1,160
Likes: 3
From: Greensboro NC
Default

Ganey,
How can I tell what caused the failure of the current cam? #2 exhaust pushrod travels almost 0 inches. Haven't torn it down any further?
Reply
Old Sep 9, 2004 | 08:45 AM
  #6  
76REDSTINGER's Avatar
76REDSTINGER
Instructor
 
Joined: Jun 2004
Posts: 233
Likes: 0
From: algonac michigan
Default

im seeing a pattern here.....

why are all the XE cams failing?

not sure if ill invest my money in one


R.
Reply
Old Sep 9, 2004 | 08:49 AM
  #7  
Ganey's Avatar
Ganey
Race Director
10 Year Member
 
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Default

Not enough info., valve could have been stuck & may have bent the pushrod, etc.
Reply
Old Sep 9, 2004 | 08:53 AM
  #8  
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

Originally Posted by 76REDSTINGER
im seeing a pattern here.....

why are all the XE cams failing?

not sure if ill invest my money in one


R.
probably a result of poor hardening after grinidng combined with a (for a hydr. flat tappet) aggressive love pattern...
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Joe Kucinski
story-1

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

 Verdad Gallardo
story-2

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

 Joe Kucinski
story-3

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

 Verdad Gallardo
story-4

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-5

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

 Michael S. Palmer
story-6

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

 Joe Kucinski
story-7

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

 Michael S. Palmer
story-8

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

 Joe Kucinski
story-9

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
Old Sep 9, 2004 | 08:53 AM
  #9  
comp's Avatar
comp
Team Owner
10 Year Member
 
Joined: Sep 2003
Posts: 88,393
Likes: 2
From: eville in
Default

contact CompCams about it, a member posted they warrentied his
Reply
Old Sep 9, 2004 | 09:00 AM
  #10  
76REDSTINGER's Avatar
76REDSTINGER
Instructor
 
Joined: Jun 2004
Posts: 233
Likes: 0
From: algonac michigan
Default

warranties are nice, but who has time to tear down the engine

when it fails?

R.


might have to start a poll on this, "xe" good or bad?
Reply
Old Sep 9, 2004 | 11:57 AM
  #11  
nastee383's Avatar
nastee383
Melting Slicks
20 Year Member
 
Joined: Apr 2000
Posts: 2,145
Likes: 1
From: Ft. Walton Beach, Fl USA
Default

Originally Posted by micks69
After running my newly rebuilt engine for a whopping 400 miles my cam seems to be wiped and I need a new one. BTW: Comp XE268h

How do I determine which one of the 50 billion different types of cams to choose?

468/Original intake/KB 9.5:1 pistons/Q-Jet/Original Iron heads with enlarged Intake valves/used for fun driving no serious competion and I'd like it to idle.
Even though I had 2 XE's wipe, 262 after 6 years and 268 after a week I still love the way the XE262 performed during it's lifespan. For a small cam in a 383 it was an overacheiver IMHO. My car ran 8.0's all day long and a best of 7.99 (12.5 quarter) in the eighth NA and 7.143 (11.3 quarter) with a 125 shot. That's with a Q-Jet and a 12" 2000 stall converter. Unfortunately I had my motor out twice in the last month messing with those XE's. The last time I installed an ISKY270/280 Mega cam and so far all seems OK. The car "feels" like it can equal or exceed the previous performance. I'll find out for sure later this year.
Reply
Old Sep 9, 2004 | 07:44 PM
  #12  
micks69's Avatar
micks69
Thread Starter
Burning Brakes
15 Year Member
 
Joined: Aug 2001
Posts: 1,160
Likes: 3
From: Greensboro NC
Default

Originally Posted by 76REDSTINGER
warranties are nice, but who has time to tear down the engine

when it fails?

R.


might have to start a poll on this, "xe" good or bad?
Reply

Get notified of new replies

To Cam question





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

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE