New motor 468 cui
Le Mans Master
Joined: Mar 2001
Posts: 5,738
Likes: 644
From: Lincoln, CA
OK so are you going to use a thicker head gasket or can the head have material removed.
Can we see a picture?
I had some same issue with my Edelbrock heads that were milled. When doing the math after machining they choose a flat piston.
Can we see a picture?
I had some same issue with my Edelbrock heads that were milled. When doing the math after machining they choose a flat piston.
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Will do, everything is going to be checked before assembly!
This engine will be one of a kind, so much more fun than a crate!
Big thanks to Chris who has supported me in my build and chipped in!!
This support is hard to find theese Days!!
This engine will be one of a kind, so much more fun than a crate!
Big thanks to Chris who has supported me in my build and chipped in!!
This support is hard to find theese Days!!
Le Mans Master
Joined: Apr 2001
Posts: 5,438
Likes: 1,255
From: Sarver Pa
2021 C1 of the Year Finalist - Modified
When I build an engine I like to clay the pistons, then problems like that are found early. I am building a 468 now w domes, big valves and a roller cam, the short block is together so that is my next step. Lessons learned the hard way ! Good luck and hope it all works out.
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Final report on my build.
New bearings since i had got the wrong ones from my shop...P bearings insted of H...wich is what i will install now.
Jonas made some measuring of pushrods and i will swap from 7,8 to 7,4" on intake and 8,65 to 8,4" on exhaust... he was not satisfied with rockerwheel print on valvestem.
Build an engine as a newbie is not cheap if you dont know how...but i have learnd everything about my engine and Bigblocks in general...so share and be happy!
New bearings since i had got the wrong ones from my shop...P bearings insted of H...wich is what i will install now.
Jonas made some measuring of pushrods and i will swap from 7,8 to 7,4" on intake and 8,65 to 8,4" on exhaust... he was not satisfied with rockerwheel print on valvestem.
Build an engine as a newbie is not cheap if you dont know how...but i have learnd everything about my engine and Bigblocks in general...so share and be happy!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
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
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
The source of my engine knock is found.
Its the piston domes that have very slightly hit the head, nothing is broken.
Some light machining to the heads will fix it.
Cause for this is that i have shaved heads and decked engineblock.
I have Mahle forged pistons with 28cc dome.
So all you guys out there building your own engine, have this in mind so it wont happen to you!
Its the piston domes that have very slightly hit the head, nothing is broken.
Some light machining to the heads will fix it.
Cause for this is that i have shaved heads and decked engineblock.
I have Mahle forged pistons with 28cc dome.
So all you guys out there building your own engine, have this in mind so it wont happen to you!
Update in my engine build!
I still have a very loud lifter noise on one cylinder, readjusted lifer preload to 1 1/4 turn, and it got better, will do some highway driving and put some miles to it and see what happens.
Had some issues with pinging, reset timing to 14 initial and 18 max mech at 3000rpm, that did the trick.
I still have a very loud lifter noise on one cylinder, readjusted lifer preload to 1 1/4 turn, and it got better, will do some highway driving and put some miles to it and see what happens.
Had some issues with pinging, reset timing to 14 initial and 18 max mech at 3000rpm, that did the trick.
To make a long story short.
Everything was balanced when we discovered that i had got the wrong pistons, Chris sent new ones and we had to rebalance it and add some weight to flywheel to get it right.
Dont ask me why and how, i am a newbee on this.
Crank, cam and camgear in place, next pistons and rod install.
This is my first enginebuild and doing it myself, with a little assist from my mechanic, great fun!!
Everything was balanced when we discovered that i had got the wrong pistons, Chris sent new ones and we had to rebalance it and add some weight to flywheel to get it right.
Dont ask me why and how, i am a newbee on this.
Crank, cam and camgear in place, next pistons and rod install.
This is my first enginebuild and doing it myself, with a little assist from my mechanic, great fun!!
I have to say you owe ciwi the owner an apologize for saying that rather than install a brand new 502. My sympathies to ciwi and I believe you are now a BB expert and can really help others on this forum with your new experience.
Thx for sharing.
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
Your welcome sir. Glad you found the source of the noise and it wasnt' valve train.
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Car is up and running!
I had to back of inital ignition to 12 to stop the pinging, running 18 mech and intake vac to distributor. CR is 10,5:1 and static compression 196 psi.
I get 14 mpg at 65 mph, that is very nice with a TH400 and a Straub cam. Happy days!
I had to back of inital ignition to 12 to stop the pinging, running 18 mech and intake vac to distributor. CR is 10,5:1 and static compression 196 psi.
I get 14 mpg at 65 mph, that is very nice with a TH400 and a Straub cam. Happy days!
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
Glad you got her on the road before winter hit sir. Figuring out it was the piston hitting the head and not a valvetrain issue took some time but its all worth it in the end. That fuel mileage would not come with a 502!!! Congrats man!!!
Race Director
Joined: Jul 2004
Posts: 12,707
Likes: 329
From: Scottsdale Arizona
I think you were wise yo choose forged pistons. Hypereutectic are strong and much cheaper but are also very brittle. They probably would have shattered with the contact that you had.
Last edited by CA-Legal-Vette; Sep 11, 2016 at 01:25 PM.
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
What i love is the bottom end torque and how she idles, a bit rough but what a lovely exhaust sound with longtubes and custom built stainless exhaust, puts a smile on my face everytime i start it!
I could have dynoed it, but it was to expensive...800$...
Jonas calculated TQ to 510 ft/lbs at 3500rpm
With this cam, fuelmilage is a suprice and a big bonus.
Last edited by clwi; Sep 11, 2016 at 01:35 PM.
Le Mans Master
Joined: Jan 2006
Posts: 6,506
Likes: 139
From: Butler Pa
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
I am so happy with my engine, it feels soo strong and runs great.
I do have to use 95oct because high compression, 7,7 dynamic and 195 psi static and 10,5 CR, a bit high for my 049 iron heads but it works so far..
I am in the break in period now, done 500 miles so far and all smiles.
I do have to use 95oct because high compression, 7,7 dynamic and 195 psi static and 10,5 CR, a bit high for my 049 iron heads but it works so far..
I am in the break in period now, done 500 miles so far and all smiles.
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
I am so happy with my engine, it feels soo strong and runs great.
I do have to use 95oct because high compression, 7,7 dynamic and 195 psi static and 10,5 CR, a bit high for my 049 iron heads but it works so far..
I am in the break in period now, done 500 miles so far and all smiles.
I do have to use 95oct because high compression, 7,7 dynamic and 195 psi static and 10,5 CR, a bit high for my 049 iron heads but it works so far..
I am in the break in period now, done 500 miles so far and all smiles.
Glad your getting some time on it sir before it has its long winter nap. Good thing is next spring you can have all year to play with it!!!!!!
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
I don't think Jebby owes any apology....Claes is very happy with the build. I think you owe Jebby an apology.