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R32GTR/Iceland
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GTScotT Grand Master

GTScotT

Posted
Posted

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.

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SimonR32
SimonR32

The 6262 sillyness is never ending... New cams just got the most power and torque it's ever made

SimonR32
SimonR32
Mick_o
Mick_o

Dale is 100% correct its a well proven fact that smaller cams in RB's aid in response. Even going from a stock cam to a type b pon cam will cost you response. Been many track guys that have thrown the

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Mitcho_7 Mentor

Mitcho_7

Posted
Posted

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 Contributor

JGB1600

Posted
Posted

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 Contributor

JGB1600

Posted
Posted

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.

JGB1600 Contributor

JGB1600

Posted
Posted

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:

image_zps40a575df.jpg

image_zpsb47c04cf.jpg

image_zps323e3c05.jpg

  • 3 weeks later...
DVS JEZ Grand Master

DVS JEZ

Posted
Posted

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

rondofj Veteran

rondofj

Posted
Posted

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??

DVS JEZ Grand Master

DVS JEZ

Posted
Posted

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 Mentor

Mitcho_7

Posted
Posted

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!

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