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›VL Commodore
VL Commodore

Gt 42 turbo upgrade

Started by J3WJ3W · 16 July 2012 · 87 replies

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

J3WJ3WArchived member
So your saying eventually im goin to have to get it forged?
0 likes
boosted_wagonArchived member
Mate, put it this way u can leave it like it is but it will break plain and simple, see ya going big bolt ons with out strengthening the heart of the beast, ya adding huge amounts of stress to a 26 year old engine, what do u think is going to happen, and not only ya engine but ya gear box clutch, tail shaft, diff, bushes, breaks.... Man ya have already bought stuff just bolt it on but don't complain when things break
0 likes
boosted_wagonArchived member
And have fun that's the main thing
0 likes
madrexArchived member
Mate if its a good safe tune your motor will be fine drive it with new turbo setup on to the tuners and leave stock injectors in get others fitted at tuners and dont boost it to after tune people are running 9s on stock bottom ends you will need a cam tho stock cams kill big turbos so make sure its a good tuner most important thing
0 likes
J3WJ3WArchived member
Quote: Originally Posted by madrex Mate if its a good safe tune your motor will be fine drive it with new turbo setup on to the tuners and leave stock injectors in get others fitted at tuners and dont boost it to after tune people are running 9s on stock bottom ends you will need a cam tho stock cams kill big turbos so make sure its a good tuner most important thing I was told by a few people JJM turbo are the go and it's relatively close so I'll go there unless anyone knows of a better place in cranbourne so I'll get it all put on and drop it into them and get then to make a few decisions on where I can go from here thanks heaps for all ya help guys ---------- Post added 17-07-12 at 21:51 ---------- Quote: Originally Posted by boosted_wagon Mate, put it this way u can leave it like it is but it will break plain and simple, see ya going big bolt ons with out strengthening the heart of the beast, ya adding huge amounts of stress to a 26 year old engine, what do u think is going to happen, and not only ya engine but ya gear box clutch, tail shaft, diff, bushes, breaks.... Man ya have already bought stuff just bolt it on but don't complain when things break And the Motors still pretty fresh im the third owner the first was an older bloke that used it as a daily and had it rebuilt not long before my mate bought it he had it for Mac 3 months and stacked it pissed it was kinda a shame to cos it was one of Only 200 made limited edition calais wagon, since I've had it it's been on the road for 9 months in 3 years and ive been pretty tame with it because it doesn't have a whole lot for one and Im the only person in my area with a bright yellow vl turbo. And ive never seen the temp gauge on half it sits on one bar most of the time but as I said I've been pretty easy on it
0 likes
HTURBOArchived member
Quote: Originally Posted by J3WJ3W [View Post] I was told by a few people JJM turbo are the go and it's relatively close so I'll go there unless anyone knows of a better place in cranbourne so I'll get it all put on and drop it into them and get then to make a few decisions on where I can go from here thanks heaps for all ya help guys Yeah JJM Turboworld are pretty good. Lee Wilson the previous owner of AVO Turboworld brought the business. Heard nothing but good reports. There's a facebook page aswell. http://www.facebook.com/pages/JJM-Tu...15460581840455 (http://www.facebook.com/pages/JJM-TurboWorld/215460581840455) JJM Turboworld Hallam http://www.jjmturboworld.com.au/
0 likes
J3WJ3WArchived member
You have all been extremely helpful thanks heaps
0 likes
88 ChaserArchived member
They are in Dandenong now HTURBO, in the same workshop as G and D performance now, sweet as setup to, 4wd and a twin retarder 2wd dyno in separate rooms. Twin retarder for the big boys.
0 likes
HTURBOArchived member
Quote: Originally Posted by 88 Chaser [View Post] They are in Dandenong now HTURBO, in the same workshop as G and D performance now, sweet as setup to, 4wd and a twin retarder 2wd dyno in separate rooms. Twin retarder for the big boys. Christ it's hard to keep up with times. So when did they move to Dandenong??
0 likes
88 ChaserArchived member
I know man, I didnt even know they were moving untill they were there. About 3 weeks ago. Its too hard to follow, but its the same guys from AVO Mechanical, and the guy who was the driving force behind G and D performance, all working together from the G and D factory, its an awesome setup.
0 likes
madrexArchived member
How long till the gt42 is fitted and tuned let us how it goes cheers
0 likes
J3WJ3WArchived member
I asked for the gt 40instead it still hasn't arrived expecting it tomorrow then probably off the the tuners the week after I'll post Up how I go with it all
0 likes
HTURBOArchived member
Just curious on a couple of things. Flow potential? T04z with a .70A/R comp cover & a GT42 with a .60A/R comp cover. Because the comp cover on the GT42 is smaller it will boost quicker but will it run out of the efficiency range quicker than a T04z?
0 likes
madrexArchived member
Quote: Originally Posted by HTURBO [View Post] Just curious on a couple of things. Flow potential? T04z with a .70A/R comp cover & a GT42 with a .60A/R comp cover. Because the comp cover on the GT42 is smaller it will boost quicker but will it run out of the efficiency range quicker than a T04z? The comp cover on a gt42 is not smaller its heaps bigger than the t04z
0 likes
HTURBOArchived member
Quote: Originally Posted by madrex [View Post] The comp cover on a gt42 is not smaller its heaps bigger than the t04z But I thought A/R is the size of the compressor cover. Is the turbine wheel bigger on the GT42?
0 likes
madrexArchived member
Yea a to4z is 66m and my gt42 is 76mm
0 likes
86SLVLTArchived member
Quote: Originally Posted by HTURBO [View Post] But I thought A/R is the size of the compressor cover. Is the turbine wheel bigger on the GT42? a/r is aspect ratio. a divided by r gives you your aspect ratio
Photo 1 shared by 86SLVLT
0 likes
vltrb-0Archived member
Quote: Originally Posted by 86SLVLT [View Post] a/r is aspect ratio. a divided by r gives you your aspect ratio which if anyone has tried to work out on a turbo with the numbers remove. IT'S A ****
Photo 1 shared by vltrb-0
0 likes
JUSPLNArchived member
Quote: Originally Posted by J3WJ3W [View Post] All I really wanna know is will I be able to drive it to dandynong from leongatha after I get it All set up or will it need a Tune strait away ? ---------- Post added 17-07-12 at 17:45 ---------- As for power I want as much as I can get without gettin the bottom end if ya only chasing the mid t high 200's the stock vl turbo engine is more than capable of handling that power with reliability. just make sure you get some 1 that can tune and it will b fine. and the power your after dont go over kill with the turbo t/3 highflow or small roller will work perfect
0 likes
PROMASTERArchived member
Quote: Originally Posted by IDAREU [View Post] Na don't have Facebook. Wat was rated 1000hp? Mate just cause it says 1000hp doesn't mean u will see anything near that. Here is a fun setup it made 270rwkw on adicted performance dyno. Gt35/40 .63 rear, 550cc Siemens injectors, 3" Zorst, cooler, haltec e6x, 38mm gate, std manifolds. It use to come up at like 2.300 n come on hard. Do this setup if u want a fun drive able streeter. Exactly what IDAREU says this has to be the best streetable setup performance for a street driven rb30 at present Spot on IDAREU your a legend 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 1 guest active in the last 15 minutes

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

Visitors Today14

33,602 threads, 484,230 posts and 10,932 images saved from CT

98.1% of indexed threads saved