Custom Head Gasket...where can I get it made?

[no_8wire]

Well I am getting forged rods...they have stock replacements in stock and can get them with in 2 weeks. how ever for the c/r I need, they need to be 2mm lower than stock which will take 8-10 weeks to get a set custom made.

So to save time I thought I might get a thicker HG instead. I didnt find anyone in the phone book that seemed to do them...anybody advise me where I can get one made?

[Bazda]

paradise racing can do them

[Bazda]

remember when u work out the c/r the head gasket is actually wider than the bore slightly so measure it with soem verniers first and do ur calculations from there.

oh what are all ur cc measurings so far?

[evil_si]

gaskets unlimited on the shore can make custom metal or copper gaskets, just supply an original for template

[Bazda]

Putting the 2mm head gasket will effect your squish area ratio. therefore reducing the power everywhere on the power curve. bring the squish ratio back up by using the gze low comp pistons and then u will bebale to use a much thinner head gasket.

[no_8wire]

I got 9cc for the piston depression+up to flush on the block...and 38cc for the head.

[no_8wire]

Putting the 2mm head gasket will effect your squish area ratio. therefore reducing the power everywhere on the power curve. bring the squish ratio back up by using the gze low comp pistons and then u will bebale to use a much thinner head gasket.

If I get a metal one made...surely 3mm of metal isnt going to squish like a composite one?

[Bazda]

Putting the 2mm head gasket will effect your squish area ratio. therefore reducing the power everywhere on the power curve. bring the squish ratio back up by using the gze low comp pistons and then u will bebale to use a much thinner head gasket.

If I get a metal one made...surely 3mm of metal isnt going to squish like a composite one?

ehhh???? obviously your not catching on to what i'm talking about lol.
Im not entirly sure on how it works and why it does what it does but this is just a little jist of how its measured. generally the smaller the squish area more power

Squish clearance is the distance from the edge of the piston, at TDC, to the outer edge of the combustion chamber's squish band.

[no_8wire]

ok...

maybe I will just get the conrods shorter than...and wait the 8 weeks...


Just a question in theory though...If I was to run a 3mm composite type gasket...would it blow?

[Bazda]

ok...

maybe I will just get the conrods shorter than...and wait the 8 weeks...


Just a question in theory though...If I was to run a 3mm composite type gasket...would it blow?

prob wont blow, but if u have any detonation etc it will blow alot easier.

and why not sell ur high comp pistons, and buy some low comp ones. Last time IH8TEC bought them it was like just over $500 for a set brand new.

[no_8wire]

because im lazy...and I would need to get new rings etc...which is another 250-300 above the cost of the pistons...


and to get the rods made shorter doesnt cost anything but time...haha

[Crucible]

You can run more boost with more quench, It speeds up combustion, a bit like a hammer squashing a tomatoe.

Im building a supercharged big block 429 also at the moment, I was going to use smog heads to lower the static compression ratio but was told otherwise because they were open chamber.

Being fully open chamber means slower burning and more prone to detonation, I have since brought some later cast heads that have squish pads on the out side. I am getting custom forged blower pistons that are mirrored to the squish pads to give good quench. will probley only have a few thou between pads and pistons.

More boost, less timing for more power.

[no_8wire]

??? I didnt understand a word you said sorry...

[Crucible]

How much quench are you running barry?were your forgeys mirrored to the squish pads?

Was just wondering, cause I still cant get over how much boost your running on pump gas eh?

you must be running very small clearance between the pistons and head!

[no_8wire]

hes running like 7.6:1 c/r though...

[Crucible]

hes running like 7.6:1 c/r though...

yeah but he must have really good quench to run 27psi on pump gas without any detonation.

The final compression ratio would be way past what pump gas knock point is, thats huge boost for pump gas man!

[Bazda]

I think it was 30thou from the top of the piston to the top of the deck.
the dish in the piston is pretty large thats how i get a low compression of 7.85:1 using a 0.8mm metal head gasket.

sometimes mroe timing lower boost is better than mroe boost and lwoer timing, depends on the situation.

And i wasnt intending to run 27psi we just kept turning the boost up and it wasnt knocking, that was with a total advance of 16deg on boost.

[Pelo]

This site might help Rory?
http://rcboat.com/cr.htm

[Crucible]

??? I didnt understand a word you said sorry...

no worrys I was just giving you an example of what quench is and how it affects combustion, what bit didnt you understand? allgood....

And i wasnt intending to run 27psi we just kept turning the boost up and it wasnt knocking, that was with a total advance of 16deg on boost.

Thats very impressive though, mentioned it to a couple of work mates and they couldnt believe it, so I showed them lol

[no_8wire]

??? I didnt understand a word you said sorry...

no worrys I was just giving you an example of what quench is and how it affects combustion, what bit didnt you understand? allgood....

So quench and squish are the same thing?
And the whole thing is you want your piston crowns to be as close as possible to the head? So instead of thicker head gaskets bigger depressions are more effective?



This all correct?