hey all,
just wondering cos i dont know but what was the M4 head originaly off of
i know the m1,m2 was TM'ish m3 TN'ish maybe early tp'ish too?

having said that what model had the roller rockers and heart shaped chambers because the late TPs had the 2nd gen setup so was it a m6-m7 or possibly lower?

dunka :)

are these the same engines. i was looking at jap supercars form the 60's and 70's and cam acroos this. some nice cars in the like the toyota 2000 gt,starions and heaps more.

oh hang on not the same but interesting all the same , many links to look at

http://en.wikipedia.org/wiki/Toyota_M_engine#3M

I think the M4 head is TN-TP i bought a TS motor recently it had a M6 head with roller rockers, I also have TP Elante with a M1 head, I was wondering why it is a bit slow off the mark

I have no idea what you guys are talking about.

I have no idea what you guys are talking about.
the astron had a series of heads, started with m1 ended at m9, each series had minor improvements n such. The series stamp is in the middle of cyl 2 and 3 level with the exhaust ports
and yeh im just trying to work out what model/year magna the m4 head was put on



oh hang on not the same but interesting all the same , many links to look at

http://en.wikipedia.org/wiki/Toyota_M_engine#3M
mm i wouldnt mind seeing something like this made up for the astron would heap out alot!

the astron had a series of heads, started with m1 ended at m9, each series had minor improvements n such. The series stamp is in the middle of cyl 2 and 3 level with the exhaust ports
and yeh im just trying to work out what model/year magna the m4 head was put on





Oh i get ya now :)

4 would be off a TP.
The roller rocker and kidney shaped combustion chamber heads that I have seen are marked M6 and M9 (TR and TS respectively).

I should also note that the roller rockers will work on earlier heads.

There is a little bit of information on the Astron at my website, let me know where it is lacking and I will try to fix it.

4 would be off a TP.
The roller rocker and kidney shaped combustion chamber heads that I have seen are marked M6 and M9 (TR and TS respectively).

ok so im guessing m4 would be early tp's so from late 89 to late 90 and then onwards would have had the m6?



I should also note that the roller rockers will work on earlier heads.

There is a little bit of information on the Astron at my website, let me know where it is lacking and I will try to fix it.
a page on the series of heads would be great,
as far as im aware the m1 was leaded TM (leaded sigma too i think) m2 unleaded tm (late unleaded sigma?) m3 possible tn but i have never heard of one, m4 early tp, m5 dunno?, m6 late tp and TR, M9 ts

The M6 head appears to have same size combustion chamber and valves as M4 but bigger inlet ports, the Sigma ajustable rockers don't seem to work on the M6 head, could be the valves are longer

ok so im guessing m4 would be early tp's so from late 89 to late 90 and then onwards would have had the m6?


a page on the series of heads would be great,
as far as im aware the m1 was leaded TM (leaded sigma too i think) m2 unleaded tm (late unleaded sigma?) m3 possible tn but i have never heard of one, m4 early tp, m5 dunno?, m6 late tp and TR, M9 ts
I am pretty sure the M6 was TR only. I dont recall ever seeing a TP with the nice combustion chambers.