mje_wrx

iTrader: (6)

is it safe to use a 1.1 or 1.3 headgasket, car had a 1.6, and was mapped by jgm.

getting heads skimmed and was thinking a 1.3 would improve compression.

just wondering, so many people use 1.6mm

providing there is no touching of valves on pistons, i cant see a issue. as they are interference engines anyway.

merlin24

iTrader: (1)

Depends what CR you want to run - you really need to volume your combustion chambers after the heads have been skimmed and add that into your CR calculations to determine gasket thickness.

Mick

mje_wrx

iTrader: (6)

ahhhh well thats gonna be a head ache.

mje_wrx

iTrader: (6)

Number Of Cylinders - 4
Bore - 92.5 - 3.64in
Stroke - 2.952
Chamber Volume - 49cc
Head Gasket Thickness - 0.54 in
Head Gasket Bore - 3.66 in - 93mm
Piston To Deck Height - 0.12+
Piston Type - domed


any help from here?

i got 8:3 but im honestly lost now.

got my info from http://www.wiseco.com/Catalogs/Sport...baruToyota.pdf

my pistons are the top one, K576m925 october 1998 and older

Kwik

iTrader: (10)

Would this help?
http://www.zealautowerks.com/index.h....2,7200,1500,0

mje_wrx

iTrader: (6)

ummmmm no lol

means nothing to me

Kwik

iTrader: (10)

Sorry, i thought if you put in all your info you can then change the specific gasket sizes to give you compression ratio's.

RICHARD J

iTrader: (4)

If you had 1.6 before use the same again or you may have problems with det etc.

mje_wrx

iTrader: (6)

yeh you can, iv already done that.

wondering if that compression is good. or if i can improve on it. if i done the maths correct that is.

down to jgm for tweeking then.

everychance 1.6 is the best option, im curious incase i can get more power.

Kwik

iTrader: (10)

Obviously the higher compression ratio:1 the more potent each *bang* would bring but its a risky way to go. If you have had the head skimmed then I'd reccomend a thicker gasket, or if you used 1.6 again you'd have a higher compression ratio than before. 1.3 may be too high.

mje_wrx

iTrader: (6)

i agree with you. may need to speak to jgm, see if mapping will make it safe