Head Gasket Questions

[ShiRuBiA]

Im looking to put a bigger head gasket (2.6mm probably) into a 4EFTE to decompress it a little. Is it possible to take the standard one to a laser cutter and get one made to the same size in an appropriate mateial? What sort of material does it need to be? Does it need to crush a little?

Cheers
Andrew

[Ae92typeX]

Depending on costs + shipping costs could always order one?:

https://www.rhdjapan.com/home/products/ ... ct_id=1859

[ezy10s]

Bit of a waste of time really dude- best thing to do is just run the standard thickness gasket and tune it properly.

[Crucible]

Just be careful because you are decreasing quench,which will slow combustion and promote detonation

[ShiRuBiA]

Cheers for the input!

Ae92typeX: They are about $480 for the 2.4mm delivered to my door, which is why I'm looking something a little cheaper.

ezy10s: I'm going to have a TD05 turbo, so its going to produce a fair amount of boost so will certainly tuned properly. I thought that decreasing the compression would mean i can increase the boost?

True-No-Turbo: Does decreasing the quench mean it would run lean? Higher volume combustion chamber with the same amount of fuel right?

Cheers again
Andrew

[JIZRAG]

as ezy10s has said, just use stock genuine gasket, costs next to nothing and you wont have any issuez if fitted correctly and tuned.

[matt dunn]

ezy10s: I'm going to have a TD05 turbo, so its going to produce a fair amount of boost so will certainly tuned properly. I thought that decreasing the compression would mean i can increase the boost?

Used to be the way, lower the comp and raise the boost,

but now that aftermarket ECU's and tuning abilities are better, higher ( than the old days) compression is better.

IMO
Low compression engines are sluggish off boost,
dont come on boost as early,
and dont have the potential for as much outright power,

so there are no real benefits.

[Crucible]

True-No-Turbo: Does decreasing the quench mean it would run lean? Higher volume combustion chamber with the same amount of fuel right?

Cheers again
Andrew

I dont think it would affect air/fuel ratio, but the way I understand it is, because you are increasing the distance between the squish pads with a fatter gasket ( piston to head pads) it will slow combustion which you dont want.

If you where to build a performance engine from scratch the idea would be to get the desired quench with the headgasket and choose the piston with area taken out of the CENTRE to get the desired compression ratio, therefore unaffecting the quench area.