question on BW fmw 364.5

04cr450 · Jan 27, 2015

hey guys. getting ready to go the non vgt route and going to choose this turbo(99% sure). I know there are a couple different size exhaust housings to choose from with this turbo. Which one would be the best as far as spool up/efficiency, and would this housing mate up against the factory 4" dp without making modifications? Is a waste gate needed?
I never could get a confident answer to this next question, but how would this turbo compare power wise to my current turbo(kc stage 2 vgt). I really like this turbo, good power, and great street manners. But the whistle is less than desired now and looking forward to this change lol thanks for the help.

05wh250 · Jan 27, 2015

Probably a good idea to post what all is done to your truck.

04cr450 · Jan 27, 2015

ahh sorry my fault

04 f350 eclb. 175/75 injects, fully ported intake manifold, no limit intake, arp's, warren comp trans, 6.4 lift pump to 6.0 hfcm, gear head tunes, kc stage 2 64mm vgt turbo, upgraded up-pipes.

04cr450 · Jan 28, 2015

Guess this turbo is still a mystery lol

Cutting-Edge Diesel · Jan 28, 2015

Send me a message I've sold quite A few of these turbos and personally ran one in one of my trucks. I can get you fixed up.

swinky · Jan 28, 2015

^^^ get with Matt. A set of his up pipes and that 364 will run great with 175s

It should flow a little more than that stage 2. Less back pressure as well.

Mdub707 · Jan 30, 2015

I know people running the 62FMW with 175's as well and love them. I bet that 64.5FMW makes more power than the stage 2. Just depends what you want to do with it and how you use the truck. I would advise getting Matt's divided up pipes and getting a divided housing and working with your tuner to get this right though. I hear a lot of people complain about non VGT and then you realize they're on stock up-pipes with a silly T3-T4 adapter and no tuning updates etc.... Do it once and do it right. Matt will hook you up.

JDub · Jan 30, 2015

Turbine wheel size is just as, if not more, important than compressor flow.

04cr450 · Jan 30, 2015

yes i plan on getting the t4 kit.. waiting on the 64.5 to come in from back order. matt says end of February. Gear head does my tuning now, i'll stick with him for the revised non vgt tuning.

swinky · Jan 30, 2015

04cr450 said:
yes i plan on getting the t4 kit.. waiting on the 64.5 to come in from back order. matt says end of February. Gear head does my tuning now, i'll stick with him for the revised non vgt tuning.

Good choice.

strokin6L · Jan 30, 2015

The .83a/r housing and 68mm exhaust wheel would work very well...64.5/68/83

04cr450 · Jan 31, 2015

ok^ matt is recommending a 70mm/.91 housing for better spool up. i guess either one will work? just trying to learn these numbers lol

strokin6L · Jan 31, 2015

Either one will work. The combo I mentioned would spool quick having the smaller 68mm wheel I would think... But will have more back pressure. The wheel/housing combo Matt recommended probably would be better.

04cr450 · Jan 31, 2015

ok fair enough, thank for the response, are you going back to non vgt strokin6l?

Cutting-Edge Diesel · Jan 31, 2015

strokin6L said:
The .83a/r housing and 68mm exhaust wheel would work very well...64.5/68/83

I saw to much back pressure with that set up for my liking. I would be concerned with the longevity of the turbo. 360* thrust bearing would help as would a wastegate.

strokin6L · Jan 31, 2015

Cutting-Edge Diesel said:
I saw to much back pressure with that set up for my liking. I would be concerned with the longevity of the turbo. 360* thrust bearing would help as would a wastegate.

That's what I figured Matt. So the turbo doesn't come with a 360* thrust bearing? I know its not comparing apples to apples....but when I ran a 64/71/70 non vgt t3 with the adapter flange....it spooled good. At WOT boost was 45 and bp was 54...so like a 1.2:1 ratio ...stayed 1:1 all the way to 40psi. Now that t4 setups have been out for a while....I've been really itching to get back into a non vgt. I was just worried the .91 housing would be to big...but I guess not.