3SGTE group A cams

[mattysshop]

there seems to be a bit of a variance in the specs i have found..

a few questions..

i know there not massively bigger than normal Gen 2 cams..

but how much more duration/lift vs normal Gen 2 cams

and is the timing any different, if the are did they use different gears, or different pin location? should i look at maybe altering the stock gear to retard the exhaust cam (read this somewhere)

i have some Group A cams to put into a bit of a tweaked Gen 2 (Garret, motec, forgies etc etc), just wanna know what to expect, will i actually notice the difference or am i just pissing in the wind and not really worth the effort?

cheers,

p.s. Cuts - i have been told you might be able to help with the cam timing question!?

[jonathan yee]

doesnt list "group A" cams for an st185, is there even a difference?

[gixer]

Whilst I understand you are after road going 3SGTE Group A specs.

I do have the specs for the race cars, the runs were performed on our Superflo 901 engine dyno back in the day.


this is the info I have, as well as dyno printouts

3SGTE, Toyota GT4, 2000cc
exhaust cam 304deg, set up at 104deg
intake cam 312deg set up at 116deg
Fuel computer GS76 chip
Timing GS037

8.1:1 CR
Turbo, TO3 compressor
TO4 exhaust

Peak power was 343.2hp @ 6500
peak torque was 299.8ftlb @ 4750

engine was only revved to 6500rpm.

[mattysshop]

yeh i was after the road going versions.. particularly the ADM ST185 Group A cams..

they friggen better be bigger! i just bought a set on the provisor they were definitly bigger!

[Squid]

I am pretty sure they are identical, in fact I believe the heads are identical.

According to TOYODIY -

Both the RC (Group A in aus) and the Standard 185 share the same part numbers as far as cams go.

http://www.toyodiy.com/parts/p_J_199...LMQZ_1302.html
http://www.toyodiy.com/parts/p_J_199...LMVZ_1302.html

Sorry to be the bearer of bad news.

[CLG]

I've just measured the lift of both Group A and standard ADM ST185 cams and they are the same - 9.55mm (measured by subtracting the base circle from the cam "knuckle" height). Where I do see a variance is in measurements taken at the start and finish of the cam, of approx 0.4mm (ie slightly more duration). While I will admit my measurements are somewhat rudimentry, without profiling the cam, this would lead me to place more faith in the rumour that Group A cams are slightly different from standard cams.

Regardless Matt, if you decide you don't want them, I have no issues in refunding your money - I would rather have you happy with your decision either way than feeling uneasy over a set of cams.

[mattysshop]

the cams that i am replacing are JDM GT4 celica cams..

the halfcut when purchased had an ordinary bonnet scop (like the ADM GT4) and a ceramic wheel'd CT26.. if that helps anyone..

according to Toyodiy - the inlet cams are the same.. the ex cams are different between JDM/ADM...

maybe i should just get some regrinds.. or plain old NA cams lol..