Turbo size guide
 

Found this browsing the other day. Has compressor and turbine inducer and exducer specs as well as lb/min flow numbers for pretty much all garrett, precision, and hta turbos, and some BW's too.

Turbo Spec Comparison Table (Wheel Sizes, Max Airflow, Bearings, Etc.) - NASIOC

this makes me want to sell my 6266 for a 6466... :/ and the 6266 hasnt even been on

It makes me want a 5862. The PTEs are looking really good on that list.

Sweet link! Didn't realize how much flow difference between a GT and GTX. Really want a GTX 3076R now....

Those FP's flow pretty good too, now I see why all the Subaru/Evo guys run em.

Great list and great find. The flow rates are interesting to see across the board, because Precision has proved time and time again their Turbo's flow oh so much more than what they're rated at.

I think the 6266 is a better fit for you. That 6466 flows, and substantially more than the 6266 but it's also physically larger AND you're going to need some hella flow mods to reach it's potential.

I agree and I don't even know the guy you're talking about. At this point in time, after seeing what Dave's car did on a 6266, and in a 6 for that matter. A 6266 will more than likely with ideal conditions make 800whp in a 3.

6466 I can see easily cracking 900whp

It's the "bigger is better" mentality, ya feel?

I like response and don't really care for the snails that solely for drag queens.

This will never answer all questions or a be-all on flow, but IMO it's a good source.

I just ordered a PTE 5862 cea. My thought is it'll flow much like a gtx3576 but, being a precision, they love stupid high boost levels so cranking it up won't make me nervous.

Ugh :/ this list make my turbo look like pussy shit :(

definitely a good link. though i feel a little left out. No gtx2867.

Everything is being talked through with Pablo and Rakel... Flow isn't going to be a problem... It's going to be if the block can hold 900 if so then we will go with the 64 if not then it'll be the 62

Dave's number mathematically configured (if he had that setup in a ms3) is over 850 fwhp

Yes I know this, that's why I got the turbo ;)

Big things bound to happen in So Cal real soon

Color coded mfg's and put it in an excel spreadsheet so you lazy bums can sort it.

thats very useful! thanks!

interresting thread!

When selecting a turbo the pressure ratio is also usefull to look at instead of just the flow range. Some mix could be designed for greater flow at low pressure for a larger engine and some other are designed to run at higher pressure and won't broke because of surging issue...

The chart doest not give all the design as some kit of turbine and comp wheel could be installed in different housing giving different results. GT2871R vs GT3071R for exemple. Both have the same max flow but i their should be some difference in between...One if spinning with a small turbine so it should start sooner and choke sooner too vs the other one that is probably slower to react but pull higher in the rpm...

I'm also surprised to see how better are the billet wheel ones, garrett GTX3076R being better than a gt3582 with a 5mm smaller comp wheel, what an improvement !

The 6466 spools as fast or faster than the 6266 in every situation I've ever seen. The only reason to go with the 62 over the 64 is if you don't wanna spend the extra money on it since it's considerably more expensive.

how could a 87mm comp wheel have less inertia than a 82mm wheel using the same turbine ? I never ran any of those so i may be wrong but physically it should not happend this way?
Is it a different blade design or numbers ?

Could you have made other changes to the setup to help turbo spool at the same time?

The compressor wheel on the 6466 is actually completely different.

The 6466 is Precision's most perfectly balanced, best flowing, small-frame turbo and it shows. This is why it costs $200+ more than all the other Precision turbos.

I'd just like to thank you for having such an amazing profile pic lol

Nice to see that the "58mm" turbines on PTE are actually 65mm, which is 5mm more than the Garrett GTX3071/76 turbine wheels, which explains the reason PTE have mad flow...

that large wheel on exaust side makes mad flow at same pressure because of less exaust restriction but it probably comes with more lag?

If all else is held equal, then yes more lag. However, a better designed wheel can be more efficient and lighter (or more specifically lower MOI) to offset the larger diameter.

It would seem that people are getting pretty decent spool performance out of these, which suggests a pretty well designed/built setup...

I'm seeing 22psi at 4k on a JB 6266 with no massaging of the map by justin. He's pretty sure we can get that same boost around 3800. That's some nice spool for a turbo that'll make 800+


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