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.

 

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

 

ahhhh well thats gonna be a head ache.

 

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

 

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

 

ummmmm no lol

means nothing to me

 

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

 

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

 

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.

 

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.

 

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