Sigma-galant.com

hey guys im currently looking for a turbo to bolt up to the astron2.

just wanted to know what turbo i should use?

i have been told t04 but im unsure of the ar's n stuff like that. im only going to be running around 8psi and internally gated preffered.

been browsing forums and stuff for cheap 2nd hand ones but no luck.

could i use a t3/t4?
. 50 a/r compressor

.63 a/r turbine

.57 trim



thanks,

fonz

the bigger the rear a/r, the later its gonna come on boost mate.

the turbo size really depends on what you wanna do with the car.. cruise/daily or really lean on it

.63 was the factory a/r, and its a pretty good spot for everyday driving/cruising.
my last turbo was 1.06 rear, and boost hit late (3800), but it hit hard
my new turbo is .84 so it will come on earlier than the 1.06 but later than the .63
hopefully, it comes around 3k

i had a turbo 2.6 with a .48 rear and it was on boost pretty much from idle (1200), but it dropped off bad at 4500

also, the t3/t4 you have mentioned sounds like one of the cheapo ebay pieces of shit... if it is, dont go there
seriously, save some coin, and buy a decent branded turbo - Garrett is the go, if ya got the coin.
there are some lesser brands around, like my master power (yeah it sounds cheap and chinese, that was my 1st thought )
that are of good quality and good reputation.. it would be worth it in the end, take a bit longer, get a decent turbo.

I second that, depends what you want, But if its an 8psi setyup like you say im guessing a smaller streetable setup is the way to go.
i know the yanks do very well, with a 20G mits turbo setup on there 2.6 starions.
But i assume you have a std sigma turbo manifold? might as well take advantage of the split paulse setup.

I run a 60-1 in a .7 houseing with a P-trim 1.00 ar hot side, boost is all in by 3k (22psi) But its still a little lagy. cant just nail in when croozin down freeway at 3000rpm, unless you dont mind waiting a few seconds, drop it back a gear and the car goes sideways pretty fast.

yeh i only want a low boost setup for the street, dont think my triton revs past 5k lol dont know havent got a tacho........... but i emailed kkr and asked what type of turbo i should use and they recomended this, what u think???

http://www.otomoto.com.au/kkr/KKR430.html

thanks,

fonz

go the kkr 480. i have a kkr 430 and wish i went 1 bigger