Brain Trust Needed - 2L Refresh Options

[yeahmag]

This might be long...

My current combo runs great, but I've been sitting on a set of Finch heads from Len Hoffman for years. There is no racing right now, so it seems like a good time. Here is the current combo:

2056cc
Stock Rods
Stock 2L heads (match ported)
86a Cam
9.5:1

I got a set of JE pistons in another deal (brand new, 96mm) and they appear to be stroker pistons. By my calculations I'd only need a 5.294" rod to counter the reduced pin height and am planning on a 5.325" rod or longer. Should be good either way there.

Now for the big problem. The Finch heads have a 50cc step-cut chamber. I like to run a tight deck (.04") and that combo would put me at 10:1. To get to the 9.5:1 I've been running I'd need to run almost .06" deck height.

So three questions.

1. Can the 86a handle 10:1 on 91 pump gas with proper tuning?
2. Is it better to run a loose deck and keep it at 9.5:1?
3. Put a 2cc (or larger) dish in the piston tops to keep a tight deck and lower the CR to 9.5:1 which I know works?

Thanks!

-Aaron

[yeahmag]

@injunmort - I've been told this isn't a big deal. You can get to both sides of the rods through the cylinder spigots.

@Mark Henry I talked to Jorge at EMW and he has rods that will work for me. 5.325" length, 2L big end, 22mm small end.

http://www.europeanmotorworks.com/pvw/024-...5%22+-+Set+of+4

I'll probably need a small cylinder spacer to get to .040" deck height. Combine that with a 50cc cylinder head chamber and a 3cc dish in the pistons and I should be at 9.5:1 CR which is where I am now.