head work or 103"
HDF Community Team
Joined: Jun 2006
Posts: 12,776
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From: san antonio
well i am happy with the build, but cannot help but think the bump in compression would no doubt take full advantage of the work already done. the 103 would do that with no down time, but I fear that I will end up doing it twice. I had a master plan for 110" but $$ has turned into a concern all of a sudden. so just want to wring the most out of what I have.
Wait until you can do both and you can set the heads up for static at 10;1, corrected at 9.2 and cranking at 190psi without reducing chamber volume. Your heads don't need much work, BigBoyz "street" port for $299 will get the job done. Another $150 for cylinder boring and $175 (less 20% if from Zanotti's) for some cast flat top pistons, $100 for gaskets, so for about $800, assuming you do the work, your there. Yes, cast SE flat tops will work fine.
Or, take Scott's advice and do the 107".
Intermediate
Joined: Dec 2010
Posts: 46
Likes: 0
By all means do the heads. I just wrapped up my build with SE Pro Heads and Se Flat Top 103" Jugs & Pistons, but only did the 103 because I needed a ring overhaul anyway.
I shopped for over a year b4 I found my heads at a good price and ended up paying $699 for them. Couldn't pass compared to $750 & up for head porting and big valves.
I believe in spending the time fitting the heads/squish and using cometic head gaskets to get the 0.030" ideal. You can do the same with good heads on top of your 96". Machine the bottoms of the jugs to bring the pistons up to dead flush with the top of the cylinder, then stack up the head gaskets you need to make the compression and squish you want.
Good heads and well fitted on a 96" will far and away put a bigger grin on your face compared to putting in 103" and starving it for air with stock heads.
G'luck!
I shopped for over a year b4 I found my heads at a good price and ended up paying $699 for them. Couldn't pass compared to $750 & up for head porting and big valves.
I believe in spending the time fitting the heads/squish and using cometic head gaskets to get the 0.030" ideal. You can do the same with good heads on top of your 96". Machine the bottoms of the jugs to bring the pistons up to dead flush with the top of the cylinder, then stack up the head gaskets you need to make the compression and squish you want.
Good heads and well fitted on a 96" will far and away put a bigger grin on your face compared to putting in 103" and starving it for air with stock heads.
G'luck!
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