Anyone Have A Rb25 Highflow From "sliding Performance"?

[Trav33]

So Dan,

this SlidingPerformance Roller-bearing turbo spools slower than the stock ball-bearing turbo? You notice this difference?

[Craved]

So Dan,

this SlidingPerformance Roller-bearing turbo spools slower than the stock ball-bearing turbo? You notice this difference?

doesn't any turbo with a larger rear AR ????

[aquariuz6]

just a question dan

did you get the exact turbo off the shelf to what the site shows or did you get it customized some how?

why do you reach 10psi at 3,000 rev?

I thought you would be reaching it earlier because apparently Satanic reaches 11psi at about 1,800 revs. His turbo is customized though.

maybe you will need to tune your ecu?

[666DAN]

My one isn't the 'off the shelf version' it has a larger exhaust side. Yes it is noticeable that it spools slower than the stock turbo, but when you look at how fragile and light the stock one is; it's no suprise. I'm pretty picky about lag and this turbo isn't bothering me in the slightest, especially when it kicks in You can't expect stock response out of a turbo which will way surpass the current power output.

I could be reaching more pressure earlier by throwing some timing into the tune and removing some fuel around 2800-3000rpm, but I don't think there is a hope in hell of getting 11psi at 1800...I could only just get that with a stock turbo on my 10:1 compression engine!!!

I think most people out there, even with GCG highflows would be saying the same about where the boost kicks in.

I'm 1000% happy with it

[aquariuz6]

hmm... Interesting Dan.

I hope mine will perform similar to yours.

Planning to install it next monday.

I'll let you guys know how it goes.

Hopefully its similar to yours Dan.

I also have the bigger exhaust size.

By the way, have you had any chance in dyno differences between the stock turbo towards this turbo?

[666DAN]

No haven't had a chance to get it on the Dyno yet, also the turbo will take about 1000kms to run-in...until then you'll probably be boosting around 4000rpm like I was for 2 weeks, once everything had worn in and loosened-up it's awesome.

[Sydneykid]

I think most people out there, even with GCG highflows would be saying the same about where the boost kicks in.

I have said this many times, so I apologise for repeating myself if you have read it before.

The GCG ball bearing high flow on the R34GTT made more power EVERYWHERE than when it was standard. That’s from idle to redline.

cheers

[666DAN]

I can't comment on power from idle, I'd assume more considering that the exhaust side is 1.5 times as big as the R34 exhaust housing...hence flowing more, hence more power.

I'd say there could be a slight difference in power with this turbo around the 2800rpm-3000rpm range as my tune had a lot more timing in this area and power peaked very steeply with the stock turbo (poor traction at low rpm)

Once again though I'd be interested to see a pressure log against rpm for the GCG if anyone has this info laying around? Then we'll have something concrete to compare with regard to spooling time (even though shaft speeds aren't available to us)

Currently the car feels a lot more street friendly.

[666DAN]

I have said this many times, so I apologise for repeating myself if you have read it before.

The GCG ball bearing high flow on the R34GTT made more power EVERYWHERE than when it was standard. That’s from idle to redline.

cheers

I've actually found this interesting, as the GCG isn't as responsive as the stock turbo, so wouldn't be making pressure at the same rate, how would it have more power in the 2500-3000rpm range?

As mentioned before, I'd understand from idle to 2500rpm purely from the better flow of the exhaust, but this wouldn't account for any extra power in the rev range where the stock turbo is already at a decent shaft speed and the highflow just wouldn't be at the equivalent speed...there must be at least 500rpm where the GCG doesn't make more?

[mad082]

but the GCG has a bigger compressor so even at lower spool it can create the same airflow.

[Sydneykid]

I've actually found this interesting, as the GCG isn't as responsive as the stock turbo, so wouldn't be making pressure at the same rate, how would it have more power in the 2500-3000rpm range?

As mentioned before, I'd understand from idle to 2500rpm purely from the better flow of the exhaust, but this wouldn't account for any extra power in the rev range where the stock turbo is already at a decent shaft speed and the highflow just wouldn't be at the equivalent speed...there must be at least 500rpm where the GCG doesn't make more?

When I say “more power than standard” I mean SHOWROOM STOCK STANDARD. That’s;

Standard dump

Standard engine pipe

Standard cat

Standard exhaust

Standard ECU

Standard tuning

Standard air filter

Standard intercooler

I suspect what you are comparing is all of those things modified, but with the standard turbo. However that is obviously no longer STANDARD.

cheers

Edited May 31, 2006 by Sydneykid

[666DAN]

When I say “more power than standard” I mean SHOWROOM STOCK STANDARD. That’s;

Standard dump

Standard engine pipe

Standard cat

Standard exhaust

Standard ECU

Standard tuning

Standard air filter

Standard intercooler

I suspect what you are comparing is all of those things modified, but with the standard turbo. However that is obviously no longer STANDARD.

cheers

Ahh OK, you mean extra-shitty standard...yeah I'll go with that, the extra flow in just the housing would be an awesome improvement for a stocker which actually feels quite laggy in factory form.

[666DAN]

but the GCG has a bigger compressor so even at lower spool it can create the same airflow.

That's true, but it still doesn't reach a shaft speed which would produce the equivalent pressure before the stock turbo.

[Tangles]

more power at idle???

excuse my ignorance - but how is this possible? how can power be measured at idle???

Brendan

[mad082]

it is possible as the engine is reving at idle so it is putting out power.

[Bobjones]

Who would that be? SK? or PaulR33? I wouldn't be calling them keyboard mechanics....

The purpose of this post and forum is to promote open discussion and information, from all sides.

I havent heard anyone say that these turbos were shit, all I've heard is people's opinions, own trials and information they've provided, ultimately it is each persons own choice to choice their turbo for their own uses.

If anything I'd say most people have had positive feedback, and that's a good thing.

Ummm no...

I have had quite a few worthwhile discussions with both Gary and Paul, who are both knowledgeable.

I am referring to the sheep...so re-read my post and build a bridge...

Don't turn a good thread into your own self promotion...

[Bobjones]

Dan do you have this turbo in????

I am confused with all this GCG discussion...

[Tangles]

Dan do you have this turbo in????

I am confused with all this GCG discussion...

????? its quite clear Dan now has this turbo installed, and seems to be happy with it

[666DAN]

Dan do you have this turbo in????

I am confused with all this GCG discussion...

Yep the turbo is in, and I'm extremely happy with the performance (just to recap, feels faster running 10psi, than the stock turbo running just under the factory retard ~ 12psi)

[Bobjones]

Thanks Dan!!!

Can't wait to see what it pulss with a decent tune. So what is the pocket damage fo this little upgrade???

What are the specs seeing as this is not an "off th shelf" item???

tangles...thanks for the input...