High Compression 390

stumblinhorse said
The intake I already have is a Weiand Stealth, that I will probably open up the ports a little. The Carb I have is a Edelbrock 600 that I will try and go up to 750 if I can't get it right. I have found that stepping down a size at this altitude makes tuning a little easier.

My plan for rockers is to break it in with the stockers, then get 1.6 rollers and new PRs after about 500 miles. So I will plan on the 276 cam instead of the 268.

What I have been on the fence and getting help from @nm9stheham is the 11:1. Don't want the engine to be a PIA. But since I am doing the rebuild I figured I have 3 choices. In the kit in pistons are +4.7 or +23 or go custom, around +15, for extra money($100). But then I see, @AJ/FormS people are running 11:1 at much lower elevations. I haven't ordered the stroker kit or cam yet. I only want to do that once...

Whatever you do...don't DONT do this rediculous idea of breaking you engine in with stock rockers and then doing a change. Bad idea.

Get the rockers you want to run, the call B3 racing engines and have Mike get your geometry correct. And no, I don't care what name is on the rockers, they won't have the correct geometry. Once you get that sorted out, then start the engine. Why do all the monkey motion work that you want to do I have no idea.

Second things first. Why are you looking online to buy a cam. It's 2018. Pick up a phone and CALL someone who actually grinds cams and ask them. You have a unique situation. Why buy a cam that isn't specific for your application.

You can call:
Racer Brown
Cam Motion
Bullet
Mike Jones
Erson
Isky
And many others.
The top two provide me with 99% of the cams I use.

You'll be much happier if you call all of them, figure out which guy yet get on with best and buy a cam from him. I prefer to talk to the guy grinding the cam. If you call Racer Brown, call AFTER 5pm ET and he will answer the phone.