Anyone with a stock short block running AFR165s and a FRPP E cam? I've got the stock pistons and want to make sure the piston to valve clearence will be ok. I'm planning on using 1.6:1 rockers.
AFR165 with FRPP E cam
- Thread starter Butterfinger
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It should always be checked, but with AFR165s, you should be fine. I don't know about the 185s. My AFR 165s were run with a cam that had 5.5" lift intake and 5.6" on exhaust, 224/228 duration at .050, and 111LSA. That's more aggressive than an E-cam and it ran fine with 1.6 rockers. That was my first personal build and I didn't check the clearance, but it worked out.
oh, to the second guy, I'm sorry I can't answer based on personal experience, but it was my understanding that AFR185s require piston notching, which any machine shop should be able to do for you.
I'm not sure I get it...
You mean you had more valve lift than you had stroke?
Just kidding buddy, I realize you meant .550" and .560"
The 185s have a 2.02" intake valve, which on an inline head, usually means notching will be necessary, BUT I have heard people claim to successfully run them without notching. It all depends on the cam there.
He was referring to a spam post that you can no longer see.
You mean you had more valve lift than you had stroke?
lol, yup, that cam was a bad MFer
That's the secret
Ahhh, I see now.
Now I need to figure out if I should go with the 58cc or 60cc. I've heard stick to as close to the 9.0:1 compression ratio but also to increase compression ratio since aluminum heads can dissipate more heat. Any suggestions?
Very little. Negligible. I'd explain how to calculate it, but honestly, it's much easier for you to just google compression ratio calculator and plug in your numbers and let the calculator do the work for you.
Yea, I mean you're talking about a ~.2 increase in CR between the two. So there would probably be the possibility of a gain. What I was getting at though, is it's not like you're going to have to run race gas with the 58cc when you could get away with 87 octane in the 60cc. The difference is marginal between the two, so don't beat yourself up over it. Stock chambers can be anywhere around 61-64ish cc. Go with the 58, enjoy the little bit of CR it gives you, and have fun.
I think he means notched pistons.
BTW, grainboy, for sale offers should only be posted in the classified or IMed.
BTW, grainboy, for sale offers should only be posted in the classified or IMed.
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