Just fly cut the pistons. The "techs" over at modular head shop are a bunch of asshats. If I can avoid them, I do.
2v budget build.
- Thread starter pgfdv6
- Start date
Ill cut the reliefs for you! Send them over!
Or come over and get the right valves I have for them. The stock "Fat Lip" ones are too heavy and bent now from hitting the pistons.
Heavy valves are vital to pi heads performance
Then he should switch to the 90 pound springs, get the pistons cut, straighten out the valves and re-lap the seats.
I agree, should have valve reliefed the pistons!
Anyone reading this....NOTE TO SELF!
When involving pi heads......valve relief the pistons!
Anyone reading this....NOTE TO SELF!
When involving pi heads......valve relief the pistons!
98snakehorse
Well-Known Member
Hope my stuff works out. -16cc pistons with no valve reliefs on a PI head and blower cams.
Its not the amount of the dish size or how deep they are it is how close the rim of the piston is to the valve and must be checked. It is easy to do, and after the first time you will start doing it to check all manor of things. Look at the rim clay in this pic, the dish depth measurement means nothing, the rim crush is much thinner and this is where the valve will hit the piston. DO NOT HOPE OR GUESS or believe what anyone says including me.. check, check, check. Half of my rebuilds were just checking things out, the other half were stupid mistakes and crappy parts from Ebay.
^ he is OLD for a reason!
Fo real tho.....should you be using stock thickness gaskets and no big amounts of machining, the pistons require valve reliefs at minimum .060" deep for any shelf cam. Take materials out elsewhere, add to the depth of relief. Add to piston thickness, add depth.
So if you deck .040" from the head, used stock thickness headgaskets, mill .010 off the block and used stock pistons....the relief depth should be .110" deep....but like my good friend OLD H2S stated....dont assume.....check it!
Fo real tho.....should you be using stock thickness gaskets and no big amounts of machining, the pistons require valve reliefs at minimum .060" deep for any shelf cam. Take materials out elsewhere, add to the depth of relief. Add to piston thickness, add depth.
So if you deck .040" from the head, used stock thickness headgaskets, mill .010 off the block and used stock pistons....the relief depth should be .110" deep....but like my good friend OLD H2S stated....dont assume.....check it!
OP
OP
pgfdv6
Member
Well for the time being swapped new cams into the other set of stock pi heads that I have.
Don’t think I did quiet the amount of research that I thought I did running into several differences between the V8 and the V6
Which means more money and more time [emoji849]
Will need a new brake booster (I’m told I might have to change my pedal assembly) need a new throttle cable from a GT...V6 is too long
The fuel rail does not appear to be a stock one from an sn95 it is oem ford but doesn’t match what I see online and in my ALL DATA
Need both coolant and power steering reservoirs and I’m hoping that’s it for now...oh and a clutch since mine has mysteriously disappeared around the shop
But the motor is at least finally in
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Don’t think I did quiet the amount of research that I thought I did running into several differences between the V8 and the V6
Which means more money and more time [emoji849]
Will need a new brake booster (I’m told I might have to change my pedal assembly) need a new throttle cable from a GT...V6 is too long
The fuel rail does not appear to be a stock one from an sn95 it is oem ford but doesn’t match what I see online and in my ALL DATA
Need both coolant and power steering reservoirs and I’m hoping that’s it for now...oh and a clutch since mine has mysteriously disappeared around the shop
But the motor is at least finally in
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OP
OP
pgfdv6
Member
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OP
OP
pgfdv6
Member
Well thought I was getting closer to being done yet every step I take seems like I get knocked back 5 steps there is just too much to change over from the V6 to the V8 running out of time since the car is at my job and they are done with having it rolling around there
So I’m really contemplating looking for a gt with a blown motor and just swapping everything I’ve done in.
Hate to give up but just might be one of those V6 swaps that never pull threw.
I know most projects you spend more then u plan for but the numbers are getting way to high to deal with right now......
just thinking I’m in over my head here...
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So I’m really contemplating looking for a gt with a blown motor and just swapping everything I’ve done in.
Hate to give up but just might be one of those V6 swaps that never pull threw.
I know most projects you spend more then u plan for but the numbers are getting way to high to deal with right now......
just thinking I’m in over my head here...
Sent from my iPhone using Tapatalk
