Precision Billet Turbos

[GTScotT]

that's not why I questioned it lol, look at the power he made. 295kw. Given that he also said water injection = free 30kw, a 3071R would make 265rwkw on 18psi without hassle. Not 28psi lol.

But the water does have a negative effect before it has a positive one, unless you are tuning really aggressively with full time WI.

If you were to be injecting JUST water and not be touching the tune, just be upping the boost... You would need to crank in a fair bit of boost.

Seems OK to me.

[Mitcho_7]

I running an FJ20det which I swapped from my old DR30 skyline into my 1600. The previous turbo setup used a Fantasy split pulse single waste gate manifold and a twin scroll GT3071r and made 265rwkw on 22psi.

Perhaps that is why?

[JGB1600]

No typo. My engine was build with quite low compression, 7.9:1 I think. Because of its low volumectric efficiency, it needs more boost to make the power. Plus running standard cams as well don't help the cause.

That said, the power being made with the 30171r is still quite respectable. I have witnessed an sr20 running a 3076 @ 22 psi making 260rwkw. This was on the Unigroup engineering dyno which is where I get my car tuned.

[JGB1600]

Water injection will have a negative affect on your engine performance if it isn't metered, atomised and tuned correctly. Get it right, which isn't hard, and there are significant power gains to be had.

Mitcho_7, you are correct that the old manifold could have been hampering the power. On closer inspection it had a very poor collector design, runners which differed significantly in length and a single waste gate configuration. The replacement manifold which I designed and built has a far superior collector, runners which are almost equal in length and twin waste gates. It has also been power ported with each runner flowing between 204 and 210 CFM.

[Mitcho_7]

I'm not sure whether they picked up that its on an fj20det not and rb25det as well

[JGB1600]

Haha. Maybe mate. Hope any confusion has been clarified now.

[Trozzle]

Yeah I completely zoned out and forgot you said that, lol

[JGB1600]

After testing of the 3071r and 5558 are done, I will be upgrading to a 6262 twin scroll. I have already purchased this turbo and have begun building the manifold to suit. With a few supporting mods such a 2000cc ID injectors, cams and a RB25det gear box, I'm hoping to crack the 400rwkw barrier.

Here are a few pics of my 6262 vs my mates 5558:

[Mitcho_7]

So what's the go with kurtis and jez's setups with the 5558 and 6262 on stock motors. Have they let go yet or are they still going strong?

[DVS JEZ]

Still going strong. We retuned Kurtis's

The other day to see if we could push any harder and got to 372kw 24psi dropping to 21psi. And wound low boost up to 17psi making 330kw instead of 14psi low.

His is driven alot, mine sits around doing nothing. Drove it to the hardtuned.net meet friday night and cleared the cobwebs. Was running 25psi in the cold weather. Both engines are still looking very healthy.

I have considered putting Cams in my GTR to push the envelope a little further

[SiR_RB]

It's all in the tune

[GTScotT]

Lol cams to push the envelope? Come on man just wind some more boost into it ;-)

[rondofj]

Still going strong. We retuned Kurtis's

The other day to see if we could push any harder and got to 372kw 24psi dropping to 21psi. And wound low boost up to 17psi making 330kw instead of 14psi low.

His is driven alot, mine sits around doing nothing. Drove it to the hardtuned.net meet friday night and cleared the cobwebs. Was running 25psi in the cold weather. Both engines are still looking very healthy.

I have considered putting Cams in my GTR to push the envelope a little further

Daaaamn 372rwkw @24psi - too much power man haha, I think I would be happy with 330rwkw.. Kurtis has the same neo engine/5558 turbo as me, but also got high mount mani, E85 and forward facing plenum correct? He makes 330rwkw @17psi on E85, I make 286rwkw @18psi on 98. A 15% power increase by going E85 (286 to 330) sounds about right hey??

[rondofj]

And maybe the high mount mani made an extra 9rwkw too..

[rondofj]

Hey Jez you have probably driven both Kurtis' and Mick O's cars both on E85. Would you share your experiences? Mick's car has awesome lowdown..

[SiR_RB]

Time for e85 Ron....

[DVS JEZ]

Plazmaman plenum is 20kw, e85 say 30kw.

Its been a while since ive driven Micko's so cant give a good comparison. Also havent driven Kurtis's car since fixing the leaking bov. But was fun when i did

[Mitcho_7]

Daaaamn 372rwkw @24psi - too much power man haha, I think I would be happy with 330rwkw.. Kurtis has the same neo engine/5558 turbo as me, but also got high mount mani, E85 and forward facing plenum correct? He makes 330rwkw @17psi on E85, I make 286rwkw @18psi on 98. A 15% power increase by going E85 (286 to 330) sounds about right hey??

I thought I read in the rb25 dyno thread that you only had the .63 rear? Maybe I read it wrong though.

When are you seeing full boost and when is kurtis on full song?

Good to hear they are both holding up pretty well though!

[rondofj]

Both myself and Kurtis run the 0.63 rear. I see 18psi at 4000rpms, lag-boat. But goes pretty hard when it does.

[DVS JEZ]

Lol Ron, 4000rpm is not laggy