Back to shop ↗
THE HOLDEN COMMODORE FORUM

HOLDCOM Community

Built around the cars. Kept alive by the people.

+ Start a discussion
Holden Commodores gathered at Holdcom
Forum Home›Technical help
Technical help

Advice on gt30

Started by Adjet · 12 Aug 2005 · 85 replies

Preserved from CalaisTurbo. Original authors and dates are shown; archived members are not current Holdcom accounts.

AdjetArchived member
I have come accross a ripper deal on a gt30 and as my wastegate on my t3 is on its way out i thought i might buy it, just wondering how much effort there is involving mounting one to the factory manifold, and if my stock engine will handle one of these puppies. I have a cooler exhaust etc, but factory fuel system apart from a malpassi. Just cant pass up the deal as it is brand new in the box just waiting for me to bolt it on???? Any advice and information on what i should look out for and how i go about fitting one would be a huge help!
0 likes
STONE RACINGArchived member
if its internally gated then it will bolt straight up just a dump pipe will need to be made may b oil lins aswell but all round a days work !! if its externally gated then its the same but youll need to blow a hole in your mani and fit a pipe for external gate
0 likes
NinetySixArchived member
^^ thats about it didnt think GT30's came with internal gate tho... i just bought a GT35/40 1.06 rear with internal gate, gonna be fun you might have to slightly modify cooler piping, and it might need a spacer plate so the comp cover dosnt foul on the exhaust manifold (duz360 sells 20mm spacer plates msg him) you would want to grab a set of bigger injectors (GTR for example, or 036s or even 363s) and a aftermarket ecu, bigger fuel pump too (984 is nice) the bucks add up of course but horsepower costs money.... then ya gotta worry about your gearbox/clutch coping with the power how cheap is it any way? Some original photos have not been recovered yet.
0 likes
StockyMcStockArchived member
NinetySix: how much did the 35/40 cost you, and where from? this is the turbo i am looking at for my twincharge, but i suspect it might be a bit small. if yours is going onto an RB30 SOHC i would love to hear your results, particularly with boost control and lag of the setup. is it going to be tuned soon? Adjet: you could probably run 6-7psi on the GT30 before your stock fuel system runs out of scope. it won't feel a hell of a lot laggier than before, but it sure will make more power!
0 likes
NinetySixArchived member
it was a bout $1800 and there are quite a few places you can get them for that price, just look in the for sale section (advertisers) JNRGMH has a few left for $1500, spewing i missed one of those... PM him if your keen i doubt very much it will be "too small" unless you have a realllllly wild motor. these turbos could pump around 400rwkw, give or take a few.. the wastegates work fine on XR6's so i dont think they will have any trouble on a VL, plus its a fairly decent looking unit hope to have it all bolted together in a month or 2, but i still need injectors, a clutch that *might* handle the grunt, a lokka for the diff and a dump pipe & intake piping to be made up ....
0 likes
StockyMcStockArchived member
$1500 is extremely cheap! just waiting on a tax return now and i'll pm the man about one, $1799 from him was the cheapest i have seen to date. the motor isn't really too wild, but it's a bit different to most which is why i need a big turbo. see my signature for a hint Some original photos have not been recovered yet.
0 likes
R31NismoidArchived member
you can get int gated 30's... being that a 35 esentially isnt much different at all it stands to reason. They are the same dimensions if i recall correctly. Just the cart and w Im selling my GT30, 8,500kms on it as a side note Buyer of my motor package etc wants to use a different turbo Some original photos have not been recovered yet.
0 likes
1815261Archived member
i jus bought a GT30/40 for $1800 internaly gated go's on2 stock manifold with a 20mm spacer plate and i got braided oil lines so its alot easier 2 hook up.
0 likes
AdjetArchived member
just waiting on the tax man to give me some cash lets hope its enuf, so you rekon it was fairly easy 1815261?
0 likes
NinetySixArchived member
like me, a hell of a lotta people have bought internal gated big GT turbos, but havnt fitted em yet :I
0 likes
1815261Archived member
hahaha good ol tax return aye, YEP im doin the same, waitin on that money so i can put it on.
0 likes
NinetySixArchived member
1815261, is yours a GT30/40 or a GT35/40? internal gate with a 1.06 rear, .70 comp cover with 4" inlet?
0 likes
1815261Archived member
its a gt30/40 rated @ i think 550hp, .63 rear,.70 comp cover, internal gate.
0 likes
NinetySixArchived member
hmmmm .63 sounds a bit small, .82 would be nice tho
0 likes
TempestArchived member
just tuned a gt3082r on mine, external gate, .82 housing, 600hp. 340hp on 20psi. i paid less the $1500 for it, brand new, genuine garrett. drives like my old hiflo did. except my 60ft times are fuced. traction issues now...
0 likes
StockyMcStockArchived member
phwaor, nice figures grantos. that's about 250rwkw i believe, more than enough in a manual VLT! does it wheelspin 3rd now?
0 likes
NinetySixArchived member
ill be happy if i get 250rwkw with my setup what are the chances of a stock vlt cam doing that? :|
0 likes
StockyMcStockArchived member
for the cost of a cam regrind, there is no point in NOT doing it. for less than $300 you can get a custom ground cam which will help to no end. i would do it even before i upgraded the turbo on a SOHC RB30.
0 likes
NinetySixArchived member
mmmmm the costs just keep adding up hahah i think off the shelf cams are about $200, might go with that
0 likes
TempestArchived member
it's closer to 260rwkw i believe... and yes, it bags 3rd... Some original photos have not been recovered yet.
0 likes
Sign in or create an account to reply. New members are welcome—no purchase or old CT account needed.

Who’s online

0 members and 0 guests active in the last 15 minutes

No signed-in members active right now. Guests are welcome to browse.

Visitors Today1

33,594 threads, 484,053 posts and 6,776 images saved from CT

98.1% of indexed threads saved