Jump to content
SAU Community

Recommended Posts

I cbf quoting a few points, so i will just state my opinion on a couple of issues raised and hopefully you know what i am refering to. :D

1/ At 14psi i honesty do not think you will reach 250rwkw, i think you may require about 18psi.

Damn i was close to the mark B) , bit more tuning, 18psi and 250 is acheivable :D.

Good result, you should be very happy with that kind of power. Still waiting to get mine back :O, but i am doing a few mods :D

  • Replies 166
  • Created
  • Last Reply

Top Posters In This Topic

yeh i am pretty happy with the results, and i think with the cams i should reach close too the 250rwkw mark..... plus i dont wanna push the car much more anyways, well not until i get myself a new bottom end, and wack in some more boost and maybe even a new plenum...

i understand wat u mean, i have been waiting for about 2 months for my car to be finished, i had heaps of work done...

yeh i asked to be safe, i dont want the bottom end to give way on me just yet.... im planning to rebuild the engine with some forgies and rods, and even maybe some cams... then ill up the boost a little and push for the 300rwkw...

just a few questions -

1. What size Exhaust housing are you using? Its it a .63 or a .8*

2. What size compressor housing are you using?

3. And what kind of turbo is it? Garret or HKS? Is it 550 hp?

Just wondering, as I am bolting one on this weekend. (garret GT30, with a .63 ass end)

i used a garret GT30R, its ball bearing, i dunno if urs is, but its the 550hp version, and i used a .82 rear housing, not sure about the compressor, its a little laggy but man when it hits full boost its amazing... a .63 rear will be heaps better and less laggy.... by the way nothing will bolt straight on, it takes a lot more work then u first think.

yeah we know, need spacers, oil and water lines, new intake, pretty much a lot of work.

I got the VG30 rear so it will use my custom dump and flange.

The my mate that is doing it, is a boiler maker \ fabricator. He's built a 300rwkw rb25 from the ground up, a GTiR motor with a 600hp turbo from the ground up, done shit loads of jobs on VLs, GT starlets, Falcons, Holdens etc.

Bit of a back yarder, and I have never EVER seen work from trust, apexi, HKS or whatever brand that is better than his work.

Guess I'm lucky to have a mate like that hey.. heh..

He's one of those quiet types, you know, the decent ones.

I'm a little worried though. I wanted to get about 250rwkw with about 1 bar of boost and a good tune. The car runs really well (2% leakdown with 169psi accross all cyclinders) and the mods I have provided for the upgrade are -

Garett GT30 550hp (VG30 rear end)

Nismo 555cc Injectors

Apexi Power FC

Full exhaust, split custom dump, hi flo cat

Full 4 inch intake and partitioned pod filter

Q45 AFM (90mm)

FMIC

Unopened motor

I'm one of those types, that thinks the less boost the better, as less boost equals less engine wear because its not being forced as hard.

Also, running boost above 16psi on a stocko rb25 is dangerous... As Blown gaskets, and bent rods is just around the corner...

I really don't want to have to open the motor up. if I did, I would bother upgrading, I'd just leave it at 210rwkw and sell the car

Edited by The Mafia
its a little laggy but man when it hits full boost its amazing... a .63 rear will be heaps better and less laggy.... by the way nothing will bolt straight on, it takes a lot more work then u first think.

a .63 would be worse to drive on the street.

It ramps up just that little bit earlier and then wheelspin in an issue. A few people have seen this with a .63

The .82 from all reports is definately the way to go if you can, if not then .63 you'll have to get used to with the right foot :(

It wont be "that" much sooner in response. The way it'll deliver power will be sharper though.

yeah we know, need spacers, oil and water lines, new intake, pretty much a lot of work.

I got the VG30 rear so it will use my custom dump and flange.

The my mate that is doing it, is a boiler maker \ fabricator. He's built a 300rwkw rb25 from the ground up, a GTiR motor with a 600hp turbo from the ground up, done shit loads of jobs on VLs, GT starlets, Falcons, Holdens etc.

Bit of a back yarder, and I have never EVER seen work from trust, apexi, HKS or whatever brand that is better than his work.

Guess I'm lucky to have a mate like that hey.. heh..

He's one of those quiet types, you know, the decent ones.

I'm a little worried though. I wanted to get about 250rwkw with about 1 bar of boost and a good tune. The car runs really well (2% leakdown with 169psi accross all cyclinders) and the mods I have provided for the upgrade are -

Garett GT30 550hp (VG30 rear end)

Nismo 555cc Injectors

Apexi Power FC

Full exhaust, split custom dump, hi flo cat

Full 4 inch intake and partitioned pod filter

Q45 AFM (90mm)

FMIC

Unopened motor

I'm one of those types, that thinks the less boost the better, as less boost equals less engine wear because its not being forced as hard.

Also, running boost above 16psi on a stocko rb25 is dangerous... As Blown gaskets, and bent rods is just around the corner...

I really don't want to have to open the motor up. if I did, I would bother upgrading, I'd just leave it at 210rwkw and sell the car

to be honest i dont think the .63 is much better, and also i dont think 250rwkw is possible at 1 bar, with the mods provided... i havent reached 250 yet and im running over 16psi...

this is scary. almost double the turbo size, and only get 30rwkw?

I have a ex cam gear too if that makes any difference. At 0 degrees at he moment. Let just hope my tuner can do what is needed.

As I said, I'm running 210rwkw at only 12psi on a stocko turbo..

You shouldn't need to run over 16psi on a turbo twice the size to get 250rwkw.. ??

I guess we can only see what my tuner comes up with.

this is scary. almost double the turbo size, and only get 30rwkw?

I have a ex cam gear too if that makes any difference. At 0 degrees at he moment. Let just hope my tuner can do what is needed.

As I said, I'm running 210rwkw at only 12psi on a stocko turbo..

You shouldn't need to run over 16psi on a turbo twice the size to get 250rwkw.. ??

I guess we can only see what my tuner comes up with.

Throw it on the dyno you made 210rwkw and you will make 300+ with the GT3O :P:D:D

jk

Throw it on the dyno you made 210rwkw and you will make 300+ with the GT3O :P:D:D

jk

You may "say" you're joking, but it is probably true.

A while ago I was running ecu, stock turbo, 13psi, and usual mods. On my mechanic's dyno it made a solid 183rwkw and felt strong. A week later I went to a dyno day and it made 214rwkw (same fuel, etc). Now that was a joke, dynos are only good as a tunning tool. On dyno days it is good to compare your car to others, as they are all run on the same dyno, by the same driver, on the same day. That is the only time you can compare figures, otherwise a peak power comparison ain't shit.

The Mafia: So once you upgrade your turbo, take it to the same dyno and compare and evaluate the result, but don't be disappointed if you take it to another dyno and "mysteriously" loss 30rwkw.

hey mass ill run ya lol :huh:

congrats on the mods, wat dyno was it run on? was it MRTs hub dyno?

na it was a dyno dynamics dyno, dont know where tho have to check, i think in padstow....thanks, hows ur car going...

Not sure, but i had a mechanic do 2 consecutive runs, one in "shoot out" mode, the other "normal", their was only a 4rwkw differance btw the two.

Also we did a run in 4th, the 3rd and there was only a 2rwkw differance. Provided the tunner is honest and tell the dyno the run is in third :huh:

The Mafia , count the number of compressor blades and hope it has 6 , 6 full and 6 half height . The Garrett people believe that the GT30R (700382-12) needs an 82 or 1.06 rear housing not to choke its potential .

Running the VG30 BB housing is a grey area because its native turbine is much smaller in diametre and the machined away nozzle may not want to know about the GT30 turbine . If you run the Garrett GT30 .63ARR housing surge may not be too far away . From a convienence point of view the HKS integral gate GT Pro S housings stand the best chance of working properly , their nozzles and volutes are different read better than Garretts Diesel housings .

Cheers A .

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
    • OK, so a bunch of trim needs to come off to get to the rear shock top mounts. Once the seat is out of the way, the plastic trim needs to come off. Remove 2 clips at the top then slide the trim towards the centre of the car to clear the lower clip Next you need to be able to lift the parcel shelf, which means you need to remove the mid dark trim around the door, and then the upper light trim above the parcel shelf. The mid trim has a clip in the middle to remove first, then lift the lowest trim off the top of the mid trim (unclips). At the top there is a hidden clip on the inner side to release first by pulling inwards, then the main clip releases by pulling the top towards the front of the car. The door seal comes off with the trim, just put them aside. The the lighter upper trim, this is easy to break to top clips so take it carefully. There is a hidden clip towards the bottom and another in the middle to release first by pulling inwards. Once they are out, there are 3 clips along the rear windscreen side of the panel that are hard to get under. This is what the rear of the panel looks like to assist:
×
×
  • Create New...