Garrett vs Precision

[khezz]

Garrett vs Precision

Hello.

cant seem to find a previous comparison thread so thought I'd start one.

want to see people's opinions on 2 specific turbochargers. The Garrett GTX3582r and the Precision Gen2 6266. Both seem to be on par in terms of power. To me it seems to be a location thing. If you are in the USA its precision if not then it's Garrett. But are there any huge differences in terms of technology? Is one definitively better then the other?

 

as an example a built 2.6l RB26 running E85. Chasing 500AWKW. Mostly for street and track.

 

which would you use and why?

[bigmikespec]

I would go Garrett as you have the benefit of a compressor map. I would look at a GTX4088 or even a GTX4294

[zebra]

...or you just use the precision and crank boost in until it makes the power you want.

 

But if you want to study a compressor map for days to find that it is most efficient at 21.9767571psi and set it there only to find that is makes 400hp and the guy with the precision is at the track running 9s already

[jet_r31]

a gen2 6266 will flog a gtx3582 power wise. notr eally the same

A gtx3582 with a gt37 turbine would be a closer match..

[Buraz]

Iv got a Precision 6262, keen to see what it'll make when turned up. This should be a closer match to the gtx3582r??? Can't hold boost atm still on standard boost solenoid. Haven't installed my boost controller yet.

[SiR_RB]

I've seen 500kw with a 6266 on a 2.6

6466 will make it comfortably and still go on to make 550kw when the urge comes to wind it up ☺️

[bigmikespec]

17 hours ago, zebra said:

...or you just use the precision and crank boost in until it makes the power you want.

 

But if you want to study a compressor map for days to find that it is most efficient at 21.9767571psi and set it there only to find that is makes 400hp and the guy with the precision is at the track running 9s already

I need the equivalent of a geiger counter for sarcasm for you zebra, lol... some people think things through a little more than 'cranking boost'.

[khezz]

Ok it seems that precision wins on outright power even though manufacturers say they should be about the same. What about response? White setup being the same, which would spool up better? In the day to day commute, which would make a nicer car to drive?

[Piggaz]

Considered an EFR 8374? 

[khezz]

This is purely out of curiosity rather then personal need. If it's very similar spec to the other 2, sure lets add it to the list.

this 400-500kw level seems to be where most GTR owners aim to be. Faster then 99% of everything on the road. Rediculous drag/drift/drag potential yet still usable on a daily basis. 

Edited September 16, 2016 by khezz

[33GTRV]

A 6466 with a 1.0 rear will make 600awkw. With a .84 it will make a comfortable 550awkw. Alot of tech nerds seem to hate on a lack of compressor map but the results dont lie. Turn it up and have fun

[Sub Boy32]

15 hours ago, Piggaz said:

Considered an EFR 8374? 

Amen

[Kinkstaah]

If you're starting out with a build and that's the target, the BW 8374 is probably where you'd aim as you would have a healthy budget to do so.

I also thought the GTX3582 was a size down from the 6266 and 6466, benefits of being a size down apply as the GTX is generally a good unit once you crank up the boost which is what the GTX compressor is good for over the GT. But if you don't crank the boost it's going to look "laggy" for its power, but it's just because you can (have to?) really lean on the GTX to make the power, Similar to the Precision - Less so for the 8374.

But on a 2.6 that wants 500AWKW (.. why... what gearbox do you plan to use?) the answer is 8374.

[khezz]

I always thought the gtx3582 and the 6266 were of very similar size. Both seem to reach around the 500kw mark. Learn something new every day.

So is it the common thought that BW efr8374 is the best all round turbo interns of power delivery vs lag/response?

What about cost and longevity?

[khezz]

I should point out that this is not regarding any particular car. Just want to see experienced people's views. It seems that high mount twins are dead as dead can be. Low mounts are old tech.

My car will be getting a pair of low mount Gtx units. In search of 450awkw. The cost of engineering papers puts a high mount single out of reach.

[Piggaz]

1 hour ago, khezz said:

I always thought the gtx3582 and the 6266 were of very similar size. Both seem to reach around the 500kw mark. Learn something new every day.

So is it the common thought that BW efr8374 is the best all round turbo interns of power delivery vs lag/response?

What about cost and longevity?

The EFR's cost a little bit more. 

Everyone bangs on about "light weight billet compressors" in the front.... But what happens when you take out half the weight of the other side of the wheels (turbos have two sides, seems a lot forgot this with ERR MAA GAWD.. Shiney compressor). It can't be a bad thing, right?

The people that have put on and running EFR's all say the same thing. Transient response is greatly improved, on much earlier. Transient reaponse isn't something that shows up on a dyno though.

There is a particular S2000 at the shop that will be tuning my car. They were running a 6466 and now a 9180. Turn two at Eastern Creek they would have to use second gear with the 6466 but with the 9180 they now use third. The 6466 is, a smaller turbo but the 9180 is on earlier. Makes you wonder huh?

There is a back to back I posted in the EFR thread between a 3582 vs 8374 on a larger BMW engine. GTX off EFR on. EFR made more midrange and the same top end.

For the sake of a back to back, there will be one between a 6266 0.84 and a 8374 1.05 on a 3.2/Vcam. This will happen early next year. The tuner has said that he could go to a 9180 and not lose anything down low to the 6266, however low end grunt is the goal so a 8374 has been chosen. 

[brodielezgt]

I run a 6266 gen 3 love it perfect size for street. not laggy on my Rb 26 30 the fact that it s oil cooled only was a big deal less fitting s also running evens coolant. It's not a loud turbo in comparison to the garret

[Kinkstaah]

I also saw that dyno graph, and well, the difference in minimal, and you can screw in more boost on the GTX to the point where it may nose over where the 8374 was.

It comes down a bit to what you need, and realistically, budget.

I can't low mount an 8374 on a stock manifold, (I have a 25) I can with a Garrett. Garretts are well known and extremely available and god damned durable for the most part relative to others, historically. They also always seem to perform the same no matter what car they go on. They're dependable.

The thing about the BW though, is all things considered, no one regrets having chosen it once they've paid the money. Not one person has said "Well, it's a little better, but it's not really worth the extra coin"

It can be argued that you can drive around a little more lag especially with AWD, or in my case more midrange = more smoke. That may be so, but the truth is no one is complaining once they do it.

[khezz]

Is there a gen 3? I only knew of a gen 2.

[khezz]

Just watched this video thats seems to put a little dent in the BW EFR. Its a back to back test of the 8374 vs 6266 on the same car and the 6266 wins quite comprehensively. They use a 3.4L 2jz supra. the EFR does spool quicker but the power difference is huge.