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gtx3076r vs gtx3576r vs gtx3582r

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lars y

15+ Year Contributor
141
1
Oct 11, 2007
Halden, Europe
Hi,
I`m now trying to choose a new turbo for my car, and i think these three turbos would be the best choice for me.

I`m upgrading from a gt3076r with a t31 housing, which gave me way to much backpressure and i only got around 360whp.

I am going to use the car on the track, timeattack\racing etc. Might do a little dragracing aswell. My hp goal for now i would guess is around 600bhp.

What would be the difference between these turbos?
Would the gtx3582 be very laggy for racing?
What is the difference between the gtx3076 and the gtx3576? i would think the gtx3576 would reach a higher hp, but on the Garrett site they say the gtx3076 can reach 40 more hp than the gtx3576.

Does anyone have any insight to these turbos, especially in regards to the 4G63 engine?

Thank you
 
I am really not sure which one to get. There are so many different oppinions.
I`ve found some people saying the 3576 is best for around 4.0Liter engines and would be mismatched with a 2.0 Liter. Then theres others saying the 3576 spools just as fast as a 3076 only it has more top end.
Alot of people are bragging about the 3576.
The 3582 would be very nice, im just afraid its gonna be very laggy.
All three turbos cost about the same here.
 
There are gains to be had by switching to the GT turbine housing over the old school T31 stuff. You will need to re-work your o2/DP etc. From my reading the 5-bolt “ford style” housing leaves the most on the table. Evom has a bunch of good threads regarding your OP in general. How are you logging backpressure—and what do you see? What psi & lb/min? What type of fuel? And what spool do you consider too laggy for time attack? Also, search Buschur Racing’s time attack car—it is well sorted and IIRC ran the GT35r in a few configurations.
 
I see, thank you.
Can`t really remember what the backpressure was, but it was pretty high. I also found out the turbo inlet wasn`t ported and my exhaust manifold was. I was running 98 octane (we have that on our pumps here) The 360whp was measured with a chassis dyno tho, so its a very strict number. But that turbo is more or less sold now anyways.

It looks to me that the 3576 would be the best fit for me. As its got great spool and good top end power, ive just heard that that turbo is designed for larger volume engines and might be a mis-match for my 2.0 Liter.

I found some EVO`s running the 3576 on the Evom forum, and they look pretty nice, our engines can be compared to the EVO`s pretty closely right? I mean basically its the same engine right?

Altho, the 3582 has the same compressor housing, but a bigger turbine to handle even more exhaust flow.
I feel that if i went with the 3582 i wouldnt have to worry about upgrading my turbo ever again if i wanted more power.
I will be reving the engine pretty high, maby around 9k.

I was also thinking about going with the .82ar regardless of which one i choose, does that sound sensible?

Thank you
 
Was your 30r a bolt on or did you have a t3 header? I have a hard time believing that any 30r in any housing would be limited to 360whp. Did you ever drag the car? What did it trap? The old FP3052 and 3065 was a gt30 turbine in a smallish housing, they certainly made the jam.

Also your 98 is probably like our 93 here. You just don't use r+m/2.
 
yeah i was pretty dissapointed with the 360whp. i have the dnp t3 header. never draged the car. and yeah ive heard our supposedly 98 octane isnt always what it says it is. whats "r+m/2" ?
i cant find the place in my profile where i list all my mods anymore, did it get removed? anyway, i have all the supporting mods. big intercool, 3" piping, 75mm TB, 3" exhaust, ported head, cams, ecmlink v3, ect.
 
it was a hub dyno, looks kinda like this: (just a random image i found)
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unfortunately i wont be able to drag the car in at least 6 months.
 
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I don't think your going to meet your power goals with the 3076 or 3576. I think the compressor is just too small.

I think a GTX3582 in a .63 housing with a nice small primary header is going to be your golden ticket.
 
Ah, thanks for your input.
yeah my choice has been more or less narrowed down to either the 3576 or the 3582.

am i correct in thinking that a .63 3582 would be in the middle of a .82 3576 and .82 3582? in regards to both spool and power.

wouldnt there be a chance that id have problems with surge if i went with a .63 tho?

what would be the difference between a 1.01 3576 and a .63 3582? or would they be more or less identical?
 
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1. More or less.

2. Probably not.

3. 1.01 is way to big to consider on a 3576, even a .82 is big for a 3576. There just isn't enough compressor flow to need it. Now a 3076 has a smaller turbine and it will need the big housing to get all the compressor out of it.
 
yeah i see, thanks.

im just hesitant to go with anything .63 after my previous turbo being .63 and having backpressure and surge problems.
and in all the threads ive read about the 3582 people are impressed with the power, but the spool is always a concern. but i guess a small .63 a\r would help with that.
 
You had surge issues? Like coming on boost or during a bov event? Are you sure it was a .63 and not a .48 or something stupid small? The gt3582 in a .63 is a pretty well tested setup. I don't think you'll have any trouble with it, other than being lazy compared to your current setup.....You'll foget about that pretty quick though LOL.
 
What would be the difference between these turbos?
Turbine and/or compressor size. They're all a GT30-based turbo (bearing housing, seal plate, compressor cover).
Would the gtx3582 be very laggy for racing?
Depends what you consider "laggy". Race-inspired turbos like the 30R/35R series tend to be a little laggier than others in their size category, but they're also typically capable of much more turbine flow(and horsepower) as a result.
What is the difference between the gtx3076 and the gtx3576?
Turbine size. One is a 30R, the other a 35R.
i would think the gtx3576 would reach a higher hp, but on the Garrett site they say the gtx3076 can reach 40 more hp than the gtx3576.
Not sure why that would be- perhaps the torque of the smaller turbine would be greater, but surely not the horsepower rating.
Does anyone have any insight to these turbos, especially in regards to the 4G63 engine?
30R and 35R-based turbos have been used on these cars for decades....the GTX series just has a different compressor (revised design, slightly-larger, and billet).
 
Not sure why that would be- perhaps the torque of the smaller turbine would be greater, but surely not the horsepower rating.

.

I've seen several people say that the old GT3076 was at the end of turbine flow, and the GTX wheel was too much for it. So they brought out the GTX3576 to meet the new air flow requirements.
 
That would make a ton of sense, but I'd be curious why the GT3082R (35R compressor, 30R turbine....the opposite of a 3576) was made if the 3076R was already too much...unless it was solely intended for small-displacement, low-boost applications. Although the old FP3065 used an off-the-shelf GT3082R CHRA and that thing worked great.
 
That's my thought too. That's just what I read. I did a bunch of reading on this big wheel small housing vs small wheel big housing, and I kept running across the 3576 deal. Maybe the GTX wheel sucks and takes a ton more power to drive.
 
Does anyone else have any more input?

What im looking for is a wide powerband, and a little over 600hp, so if the gtx3076 actually delivers 640hp using a 1.06 ar (and im guessing by the size it spools fast=wide powerband?) i think it would be the perfect turbo, right?

The smaller turbo -the quicker spool -the wider powerband?

The plus by going that route is i can buy a new 1.06 ar turbine housing first and try that on my gt3076 and see what gains i can get there aswell, find out if the T31 .63 housing really is the culprit to the low power on the setup i have now.

Im searching but cant really find alot of dyno sheets from these gtx turbos on a 4G63.

Also, when Garrett says a turbo can deliver 640hp, they mean crank hp right?

Thanks
 
What turbo footprint is your car currently set up for?
What do you mean? Flange port? It`s a T3. I`ve also made a DSM profile now with all my mods ect.

I'm also curious what boost you were running to only get 360whp, this turbo should be good to 30+ psi
I was running 26psi. But my boost controller snapped shut once and the turbo had no problem making 38+psi.
 
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