performace heads...
Thread Starter
Instructor
Joined: Sep 2000
Posts: 115
Likes: 0
From: Bristol Va
performace heads...
So, somehow a nut has been threw my motor and knocked a hole in my head, and if your wondering what happens it makes you have a river flowing out the side exhaust lol.
Anyway long story short, What heads are everyone running that are after market, Its on a 67 327.
90 over or so, its had a hard life
13.5 pistons,
duntov cam
team g high rise intake,
lunati ultra light crank,
bla bla bla,
It had the double hump heads with 202 valves,
Anyway long story short, What heads are everyone running that are after market, Its on a 67 327.
90 over or so, its had a hard life
13.5 pistons,
duntov cam
team g high rise intake,
lunati ultra light crank,
bla bla bla,
It had the double hump heads with 202 valves,
Race Director
Joined: Oct 2005
Posts: 12,470
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
Le Mans Master
Joined: Aug 2009
Posts: 5,474
Likes: 16
From: Houston Texas
St. Jude Donor '10-'12-'13
If you haven't opened up the motor yet? There is probably a lot more damage that a hole in the head.
Sure it wasn't detonation that blew a hole in your head?
This motor seems destined to explode.
http://forums.corvetteforum.com/c1-a...ank-broke.html
Just buy another set of double humps. With the 097 cam, there is no need for more.
Sure it wasn't detonation that blew a hole in your head?
This motor seems destined to explode.
http://forums.corvetteforum.com/c1-a...ank-broke.html
Just buy another set of double humps. With the 097 cam, there is no need for more.
Last edited by MiguelsC2; Aug 19, 2013 at 04:02 PM.
Team Owner
Joined: Mar 2002
Posts: 44,681
Likes: 1,830
From: Huntsville AL
Safety Car
Joined: Sep 2004
Posts: 4,049
Likes: 134
From: St. Clair Shores MI
C2 of Year Finalist (track prepared) 2019
2017 C2 of the Year Finalist
it is almost impossible to run 13.5:1 in a 327, not enought stroke to compress the mixture that far.
you'd have to be zero decked, .015 head gasket, 11.0:1 piston and a 58cc head.....
no room for the valve to open and no where near optimal quench...
but I bet is would sound fantastic
you'd have to be zero decked, .015 head gasket, 11.0:1 piston and a 58cc head.....
no room for the valve to open and no where near optimal quench...
but I bet is would sound fantastic
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Burning Brakes
Joined: Dec 2010
Posts: 1,224
Likes: 361
From: Southington CT
Race Director
Joined: Mar 2009
Posts: 19,777
Likes: 4,592
From: Canada's capital
2020 Corvette of the Year Finalist (appearance mods)
C1 of Year Finalist (appearance mods) 2019
Most of the specs you seem to give are guesses and probably inaccurate, especially the 13.5 to 1 !!!
If you buy aluminum heads get the biggest chamber size you can to bring it down a touch....av gas is expensive.
If you buy aluminum heads get the biggest chamber size you can to bring it down a touch....av gas is expensive.
Thread Starter
Instructor
Joined: Sep 2000
Posts: 115
Likes: 0
From: Bristol Va
its just a beater,
motor has been done years, probably 10 to 13. then i broke the crank, put new crank in and thicker head gasket so pistons would clear. the block has been decked at some point.
I have no idea where the nut came from, at first i thought it was off the breather but its the wrong size.
Ill look back threw the paper work and get the correct specs,
motor has been done years, probably 10 to 13. then i broke the crank, put new crank in and thicker head gasket so pistons would clear. the block has been decked at some point.
I have no idea where the nut came from, at first i thought it was off the breather but its the wrong size.
Ill look back threw the paper work and get the correct specs,
Thread Starter
Instructor
Joined: Sep 2000
Posts: 115
Likes: 0
From: Bristol Va
Yea the crank a few years ago was a interesting ride lol. I though the clutch exploded at first
I haven't read about the LS swap. Ill have to do some research on it
You can see where the nut was in the piston it's not as bad as it looks in the photo. I'm guessing the flash has something to do with it
Carb
Team g intake
Bottom of damaged head. Valves look good, granted dirty but don't look damaged
The not good part lol.
Rest of parts still look new, I know crap pict
Then it runs these plugs but they have to be spaced out so it doesn't hit
I know it didn't detonate, you can the nut imprint and I had to pry it out of the head, this piston is out of 8.1l bad gas + turbo = broken
I haven't read about the LS swap. Ill have to do some research on it
You can see where the nut was in the piston it's not as bad as it looks in the photo. I'm guessing the flash has something to do with it
Carb
Team g intake
Bottom of damaged head. Valves look good, granted dirty but don't look damaged
The not good part lol.
Rest of parts still look new, I know crap pict
Then it runs these plugs but they have to be spaced out so it doesn't hit
I know it didn't detonate, you can the nut imprint and I had to pry it out of the head, this piston is out of 8.1l bad gas + turbo = broken
Melting Slicks
Joined: Oct 2011
Posts: 2,748
Likes: 90
From: Sacramento California
C2 of Year Finalist (performance mods) 2019
2018 C2 of Year Finalist
Your rod may be bent also....
I had a similar issue years ago, valve float popped the head off an intake valve, piston sent it through the head, but not before hammering the piston and rod into paperweights.
The forged piston was beat so much it was turned into a wedge you couldnt get the rings out..and the rod was s shaped.
D
I had a similar issue years ago, valve float popped the head off an intake valve, piston sent it through the head, but not before hammering the piston and rod into paperweights.
The forged piston was beat so much it was turned into a wedge you couldnt get the rings out..and the rod was s shaped.
D
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Throw some AFRs on it would pick up BIG time.
Dont need a ton of lift to pick up power with a good head it will still breather more everywhere when that valve lifts off the seat
Dont need a ton of lift to pick up power with a good head it will still breather more everywhere when that valve lifts off the seat