ptv clearance... should i fly cut?
ptv clearance... should i fly cut? i clayed my engine and found i have .070 ptv clearance on the intake with the stock graphite head gasket that came off. the exhaust has plenty of clearance and i know i'm ok there. i have read that you want .080 on the intake but was wondering if i should risk it with .070 because i really don't want to fly cut, although it wouldn't be bad considering the engine is out of the car just don't want to do it if i don't have to. i'm running hand ported 5.3 that have been milled (not sure how much got them used) i also had a local machine shop mill them a little to clean them up and do a valve job with 2.00 intake and 1.60 exhaust valves the cam is the new era streetsweaper 236 240 .630 .610 111 lsa and i will be running a gm mls head gasket. what do you guys think should i run it or cut it?
Staging Lane
Joined: Dec 2007
Posts: 60
Likes: 0
Do you have an adjustable timing set? You could retard the cam 1* if you need a bit more room. I have heard of guys running in the high .050's, but that scares me. Personally, I would prefer to have it at least .080 for peace of mind.
Trending Topics
Stock valve train...some weight saving might make another little bit of difference...
Do you use those engines as daily driver, and do the engine last for 60 000 miles before rebuilt???
About race engines, A1GP and similar run to 13000 rpm, very thight PtV clearence...
Christian
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
