kwerks

iTrader: (2)

if your max power requirement is 500 then get the one that will spool there quicker...if you go with the GT3574R please post a dyno sheet with proper specs on your build so we can catalog it

speedjunkie

iTrader: (3)

You do realize this is the one Sean suggested I get over the GT500R, which spools pretty damn fast already, because this one spools even faster, right? LOL Are you talking about the GT3574 NON ball bearing?

This is a GT series...it's the GT3574R...GT series, ball bearing.

That's what I'm trying to find out, haha. More and more I'm leaning this way.

That's just it though, I'd LIKE to get 500whp, but it's not a requirement. I'm looking more for really fast spool, but these two are so similar already it's tough to pick. The GT500R already gets a good quick spool, but the GT3574R might give me that extra edge. Whatever I go with, I'll post up all the results.

ScorpionT

iTrader: (3)

Not sure what their GT500R is but I did see the 3573 is supposed to be a quicker spooler.

The 3574 has a P trim turbine wheel, not a GT wheel(GT wheels work better with twin scroll applications). The compressor is from a GT35. I would like to see how the 3574 compares with a 4088.

My suggestion, a GT35R with a 1.06 T4 twin scroll housing.

speedjunkie

iTrader: (3)

Just so you know, I haven't seen this exact turbo on their website yet, just the GT3574, not the R model that I'm looking at. Where did you get your information?

This is their 500R kit...

http://www.a-spectuning.com/html/products/gt500r.htm

ScorpionT

iTrader: (3)

They dont have any exact turbo info on the 500R, so its still a mystery to me what they use. As far as the 3574, I was pretty sure they used a P trim wheel. I decided to ask them, I was told they replace the hotside with a Garrett 74mm. They werent specific, but I knew they were talking about the old P trim wheel, its the only 74mm Garrett made. Something was mentioned earlier in the thread about a .82 divided housing, which just happens to be something used with a P trim wheel.

GoodfellaFD3S

iTrader: (213)

Eric, I really think a nice T4 35R will work perfectly for what you're looking to do.

speedjunkie

iTrader: (3)

Oh I see what you're saying now.

I thought the 3574R was better than the normal 35R though? I want something different too, know what I mean? I hear what you're saying though.

Oh wait, I see what it is...you just don't want me to end up with the 500R like you, hahaha.

ScorpionT

iTrader: (3)

If you want something different, I think I have just the thing for you. Ill shoot you a PM with some more info.

speedjunkie

iTrader: (3)

I appreciate all the extra input and ideas from everyone, but I'm choosing between the two I posted about. I trust Sean and his experience with turbos and rotaries, everyone has had good things to say about him and A-Spec, and these were the two we were talking about. Thanks.

With all this extra input it's just confusing me more, haha.

rx72c

iTrader: (8)

GT3582 directly off the shelf from garrett.

Dont waste money on anything fancy.
T04z is a gay turbo unless you can get your hands on the hks 1.00 housing.

Zero R

iTrader: (1)

They are now for 09.

Zero R

iTrader: (1)

Just so it's clear on this thread the 3574 non BB unit spools almost identical to a BB 35R T4 1.0 it's off a touch in transient response. But from a stand still you would think they were running the same turbo. The BB unit will outperform that unit. 3574's are not laggier due to a larger turbine. They actually respond better with the larger wheel having less compressor mass to rotate. A 35R T4 1.06 is nice but it will be less responsive on some cars between shifts. The 3574R is not a good comparison to the 4088R It will certainly respond better. It will definitely be a more fun responsive 450whp car. It will not put out the same power nor have the lag of the 4088.

ScorpionT

iTrader: (3)

You guys have any plans to do back to back dyno testing of these? Id certainly like to see it for curiousity sake.

TrentO

For a road race car my concern would be less on response and more on efficient power, as the car shouldn't fall below 4500 rpms. I've attached a graph with a 7800 rpm shift point, shifting our of first to second you fall to 4500 rpm, (which should never happen on a course, as first is way too low). All the other gears have you starting the new gear around 5500 rpm. With a well setup blow off valve and a good wastegate setup you shouldn't suffer too much boost lag in the shifts.
The killer on the roadcourse is heat. The turbo has to make great ariflow with minimal heat. The GT35R family seems right happy for the 13B in the 400-450 hp space.

cheers,
-Trent

speedjunkie

iTrader: (3)

After thinking about how everyone was offering different turbo setups and saying "don't spend so much money", etc., I feel I need to remind everyone that I'm paying extra for ceramicoating and rerouting the WG back into the DP. Not only that, these kits come with DP and manifold, both with a lifetime warranty, and a Tial 50mm WG as well. Considering all that, I think it's a pretty good deal.

And I've pretty much decided to go with the GT500R-SP.

1ROTOR2NV

Has anyone purchased the 500r hp, and do you have any dyno info??

SHPNOUT

iTrader: (3)

anyone??

speedjunkie

iTrader: (3)

I bought the 500R-SP, but they're currently putting it together and I'm still deployed at the moment. I will be installing it mid May and hopefully get it on a dyno that first week I'm back before going home on leave. Although I won't have my water injection on yet. I will post up dyno info as soon as I have it.

I think I saw some somewhere on this forum already though.

thewird

iTrader: (8)

This is my tune with a 3" full exhaust and Racing Beat dual-tip catback which I have reason to believe is hurting some power. Soon I'll try again with a 3.5" or 3.75" exhaust to see the difference. Wastgate is also plumbed into the exhaust. Also to note I get full boost at 4200-4300 even though the dyno suggests otherwise.



thewird

Flyweight

iTrader: (1)

I am not sure if A-Spec supports these turbos but...

Evo guys have been having great success with Precision 6262s. They seem to spool faster than a 35r and have greater power potential. They also around the same price as the 35r. Unfortunately, the largest commercially available A/R for the turbo is .82. I am unaware of a rotary application that uses this turbo. I would give this turbo a look before purchasing as I believe that it fits your goals of quick spool and 500 whp capable. That said, again I do not know of an existing rotary 6262 car. The t3 flange combined with the .82 might be too restrictive on a hot rotary as well. Others are more qualified to comment on this than me.

Something to consider and good luck.

GoodfellaFD3S

iTrader: (213)

How much boost are you guys looking to run? If it's less than a frequent 20 psi, you're probably better off with a T4 35R in my opinion.

speedjunkie

iTrader: (3)

Well until I install the water injection (which will only be a few weeks at most) I'll be running no more than 15psi, but after that I was planning to run at least 20psi constantly, maybe up to 25psi or so, depending on whether I use just water or meth or some mix of both.

Zero R

iTrader: (1)

Yes we support them we carry precision and use precision as well as Garrett and BW.


There are ways around this.

A .82 T3 is a bit restrictive but a T4 depending on type and exducer diameter is fine for most. Our 3574's run a .84 T4 divided and have seen very nice power.

thewird

iTrader: (8)

Hey Sean whats your take or do you have an real world experience on Precision's billet turbo's?

thewird

speedjunkie

iTrader: (3)

Hey Sean, how's my kit coming along? Did you guys get the EGT bungs?