pistons
Banned
Joined: Dec 2015
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From: LA
Are those $30 pistons the Mid-USA V-Factor pistons? Are you thinking about going standard or oversized?
If the casting on the inside of the rocker cover touches the spring, you can just grind some off with a dremel. Shouldn't be an issue in most cases tho.
If the casting on the inside of the rocker cover touches the spring, you can just grind some off with a dremel. Shouldn't be an issue in most cases tho.
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Joined: Mar 2006
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I hear what your saying Texas, a topic like this has to deal with absolute facts and not opinions so when someone tells me what they recommend, I hope it's from experience and not a guess or experiment.
Now I'm curious how many people were told "just slap it in and ride" and destroyed there engine at start up.....
Now I'm curious how many people were told "just slap it in and ride" and destroyed there engine at start up.....
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Joined: Nov 2006
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From: la la land jerzey
if your indy was in business before the 1984 model EVO cam along he is an older guy with vast experience and forgetful - the first 2 years of the evo had no exhaust reliefs in the pistons - to find a bike today that comes along and still has those pistons in it - buy a lotto ticket you have a better chance
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Stellar HDF Member
Joined: Jan 2015
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From: ct
Seen the pistons in J&P CYCLE catalogs, yes stock size, don't want to bore just hone.
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From:
if your indy was in business before the 1984 model EVO cam along he is an older guy with vast experience and forgetful - the first 2 years of the evo had no exhaust reliefs in the pistons - to find a bike today that comes along and still has those pistons in it - buy a lotto ticket you have a better chance
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Stellar HDF Member
Joined: Jan 2015
Posts: 2,504
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From: ct
Just spoke to tech support at Andrews cam,he said no just bolt in without knowing what you have. Must install jugs, pistons, heads without valve spring and at TDC,drop the valves down and make sure they travel at least .050" over the said travel distance for the cam desired. Makes sense and that's what I have to do I guess. When heads are redone, the valve could be anywhere.
Also, just measured old cam per John's formula , .282 x 1.625=. .458" lift . A little different than what I looked up (.472")stock not that it's relevant, but that's what came out and a. .060" head gasket.
Also, just measured old cam per John's formula , .282 x 1.625=. .458" lift . A little different than what I looked up (.472")stock not that it's relevant, but that's what came out and a. .060" head gasket.
Last edited by glidein wide; Dec 21, 2015 at 03:14 PM.
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Banned
Joined: Dec 2015
Posts: 28
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From: LA
Chances are you'll be just fine, but it's the only way to do it. How are you going to do it, with some modelling clay to know for sure how much of a gap you have? Or just drop it down by feel? If clay, rub some oil on the piston top and valve so it does not stick.
I'm interested to know ... you say the pistons were a few thou proud of the top of the cylinders? That's unusual. I would have expected them to be 10 to 20 below the top. How thick is your base gasket?
A 45 thou head gasket is still pretty thick, defining as it does the squish.
Where are you at with the pistons, have you bought new ones? Same rule applies with them too ... measure, measure and measure again. Not all pistons are equal either. They can come up difference sizes and even oval.
I'm interested to know ... you say the pistons were a few thou proud of the top of the cylinders? That's unusual. I would have expected them to be 10 to 20 below the top. How thick is your base gasket?
A 45 thou head gasket is still pretty thick, defining as it does the squish.
Where are you at with the pistons, have you bought new ones? Same rule applies with them too ... measure, measure and measure again. Not all pistons are equal either. They can come up difference sizes and even oval.
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Joined: Nov 2006
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From: la la land jerzey
Just spoke to tech support at Andrews cam,he said no just bolt in without knowing what you have. Must install jugs, pistons, heads without valve spring and at TDC,drop the valves down and make sure they travel at least .050" over the said travel distance for the cam desired. Makes sense and that's what I have to do I guess. When heads are redone, the valve could be anywhere.
Also, just measured old cam per John's formula , .282 x 1.625=. .458" lift . A little different than what I looked up (.472")stock not that it's relevant, but that's what came out and a. .060" head gasket.
Also, just measured old cam per John's formula , .282 x 1.625=. .458" lift . A little different than what I looked up (.472")stock not that it's relevant, but that's what came out and a. .060" head gasket.