Will it hit 450 whp
#81
TECH Senior Member
WHOA, those GMPP cathedral ports be HUGE! Well, for a cathedral, anyway. I didn't know anyone was hogging out cathedrals so much. Yeah that might be an interesting test!
#82
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Ls3 will destroy them.
#83
10 Second Club
#84
10 Second Club
would be interesting to see on a 4” bore. See what the shrouding issue really means.
And as far as the shrouding issue, I’ve heard of guys squishing the Head dowls a bit to shuffle the head over to get the valve further from the cylinder wall. Really on a 4.030 engine you’d only have to shuffle the head over .015” to match a 4.060 bore
And as far as the shrouding issue, I’ve heard of guys squishing the Head dowls a bit to shuffle the head over to get the valve further from the cylinder wall. Really on a 4.030 engine you’d only have to shuffle the head over .015” to match a 4.060 bore
#85
ModSquad
iTrader: (6)
would be interesting to see on a 4” bore. See what the shrouding issue really means.
And as far as the shrouding issue, I’ve heard of guys squishing the Head dowls a bit to shuffle the head over to get the valve further from the cylinder wall. Really on a 4.030 engine you’d only have to shuffle the head over .015” to match a 4.060 bore
#88
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#89
ModSquad
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#90
ModSquad
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#91
#92
ModSquad
iTrader: (6)
LS and BBC are same dowels. Moroso makes a set of dowels for BBC offset .030” that work like a glove. I’m always buying stuff like this and doing mockups/measurements. No more “shrouding” issues fellas.
#93
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#94
ModSquad
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...and this was one of those pieces of info I swore to myself I’d never share. Good thing I like you guys.
#95
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#96
Moderator
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#97
I crush the dowels. With the parting line at 12 o’clock, I squeeze on the 3 and 9 o’clock sides with a set of pliers, then install them in the block with the parting line pointing up towards the lifters. I think you can get .015” or .020” before having to slot the head or intake bolt holes.