Precision 6031 vs Garrett 60-1
 

I just purchased a 6031 but as I was looking through the turbos I noticed it's rated for more power than a 60-1, can someone explain this to me? both turbos are stage 3 wheels .63 hotsides. only difference I see is the 6031 is a E cover and the 60-1 has a S Cover, which I figure would make more power. 60-1 is rated to 550hp and 6031 is rated to 590hp.

Re: Precision 6031 vs Garrett 60-1
 

doesnt matter swiss, your motor wont make either one safely :p

Re: Precision 6031 vs Garrett 60-1
 

yeah my clunky b16 prob won't push enough air for these turbos with that crazy ass 97whp:p

Re: Precision 6031 vs Garrett 60-1
 

Not enough specs to figure it out. Even minor differences can make a difference, like the compressor inlet/outlet sizes. It could be just marketing specsmanship, but the difference between the T04E and T04S housings is probably most of it.

Re: Precision 6031 vs Garrett 60-1
 

I ran the SC-6031E on my Integra, and it is the equivalent of the Garrett T3/T04E 60 trim. The Garrett T3 60-1 that you speak of has the same 60mm compressor inducer wheel diameter as the 6031, but the exducer diameter is larger, therefore, it will flow more lbs. per minute than the 6031.

Precision Turbo has a reputation of advertising their turbo ratings at absolute "max" whp, rather than a max "efficiency range" rating like Garrett, hence the differences in what you've seen & read.

The 60-1 will outflow the 6031 & make more power, trust me. :thup:

Re: Precision 6031 vs Garrett 60-1
 

Ive dealt with Garretts many times before, very few turbos can match the real world output they have, both at the lower end and high end of the spectrum.

Worth every penny. :thup::thup:

Re: Precision 6031 vs Garrett 60-1
 

So if the Garrett and the Precision both have the same compressor inducer diameter, and different exducer diameters, one of them isn't a 60 trim.


Are you sure you're not talking about the compressor housing A/R?

Re: Precision 6031 vs Garrett 60-1
 

Is it a billet wheel or non-billet wheel?

Another thing you must look at is efficiency, honestly you want the turbo to be in the perfect range and not just blowing hot-air.

If you squeeze a 60-1 to that 550 limit, I commend you.

Re: Precision 6031 vs Garrett 60-1
 

I'm positive.

Trim is the relationship between the inducer & exducer of both compressor AND turbine wheels, so you can end up with two turbos of the same "trim" that have both their respective turbine & compressor wheel measurements at different sizes. The standard Garrett T3/T04E 45, 50, 57 & 60 trim turbos have had their names thrown around so loosely over the years, that many people will look at the word "trim" & automatically assume that a bigger turbo will have a bigger "trim", which is not the case. For example, a Garrett GT-40R (700+ hp turbo) has a trim of 52.

OP, what is your power goal?

Re: Precision 6031 vs Garrett 60-1
 

Trim is used to describe both compressor and turbine wheels, but NOT a combination of the two. A turbo has a compressor trim and a turbine trim, but NOT a single trim that describes BOTH together. You're correct that trim is a ratio of inducer and exducer diameters, so you can't really gain any information about size except when comparing wheels of the same family. Trim is usually a spec for compressor wheels, so a 60 trim turbo has a 60 trim compressor wheel.

If your car has 18 inch wheels in the back, and 16 inch wheels in the front, you don't say that you have 17 inch wheels. You say that you have 18 inch wheels in the back and 16 inch wheels in the front. It's the same with turbos. A 60 trim turbo has a 60 trim compressor wheel. Whatever the turbine trim happens to be is a separate spec than the compressor trim.

So if two turbos have the same compressor inducer diameter, and different compressor exducer diameters, they can't be the same trim.