64/71 vs 66/73

Shop | Category: EFR Turbos | Product: BorgWarner EFR 7064 Turbo PN:179355

Ok, so its 2200. There's a smaller one too, that will do 450 hp for 1600.

Part #8374 is actually the one with the 62 inducer but it's 2400. It flows 79 lb/min.

On edit AGP turbo is actually 1700 for the 7064 turbo. They're cheaper on all the EFR lineup than most places. Man that's what I'd do.

Sent from my SAMSUNG-SGH-I717 using Tapatalk 2
 
Last edited:
Very good point... I actually spoke with Borg warner at sema last year about their efr turbos and that was the one they recommended. It was funny too. I kept telling him my goal of 5-600hp and he said it would easily make 700Ibs of torque and a truck with 700Ilbs of torque is really fun to drive. I guess he didn't take into count that its a damn near 8000 pound truck pushing 37s over 60mph through soft sand... I think I'm already over 700 torque with my current mods and it isn't nearly enough power to get me to those speeds quick enough.

I really want the efr 9180(?) But he said I would have surging issues because of the compressor & exhaust housing sizes... But that's way past my budget...

Is a waste gate necessary to hit 600hp with a 66/73/.91? I know I continue to ask dumb questions but I'm hoping to have the perfect turbo setup first try... Hence all of the repetitive questions... And yes I have been doing tons of research on turbos for about 2 years now over on CF. Seems like CF is mostly people who tow a lot and here is people that actually shoot for high HP numbers

Sent from my SCH-I535 using Tapatalk 4
 
Last edited:
If your only pushing that hx35 to 35 psi your not going to gain anything going to a larger turbo anyway.
 
One other thing I wanted to mention: Have you looked at the map for the s300 with the 63/87 vs the 66/91 compressor wheels? They flow almost the exact same lol. With the 63 wheel being smaller it will be lighter hence less rotating mass requireing less power enhacning spool time ..... blah blah
 
Would the 68mm turbine be the limiting factor in the 63s case? Honestly I've tried to learn how to read maps and haven't ever had any luck.

Which compressor is better, the 62 or 63? Seems the 62 is better at high boost?

Sent from my SCH-I535 using Tapatalk 4
 
The fun part is trying all these different set-ups till you find exactly what you want. I have been through 4 sets of injectors from cheap to top quality and several different charger from small singles to compounds to now a single s400. Next on my list is an engine build.
 
Ghost man maybe a link to figure out what your saying? I'm reading about compressor maps on full-race.com but this isn't getting any clearer

Sent from my SCH-I535 using Tapatalk 4
 
S363:

borgwarner-airwerks-series-s300sx3-turbo-pn-177280.jpg



S366:

s300-66-compressor-map.jpg
 
In a very simple form you can say PR is on left, so take your manifold pressure, add atmosphere, then divide by atmosphere, that is your PR. Find it on the left hand side and follow it to the right till you are in the "compressor island". Now follow the line straight down and that is the very basic way to guesstimate what the charger can flow. The bottom is in lb/min. This is the very simple way to do it.
 
I take it manifold pressure is whatever you want your max boost to be at?

Sent from my SCH-I535 using Tapatalk 4
 
oh ... well that was easy enough .. damn ... got a headache .... learned something ... new wrinkle in my brain ...LOL ...........small but there !!!!
 
You must log in or register to reply here.
Back
Top