Advice on VGT turbo upgrade

LaughingSavage · Jun 25, 2021

Hello! I'm new to this forum, I have a 2015 F-250 and was trying to decide which 15-17 aftermarket drop in VGT would be best as there's like 15 companies that offer them. HP goals at 4000feet id like to see 600-650whp.
I see anywhere from 61mm to 68s but im thinking a 66 should be ideal.
Im sure this topic has been talked about a ton here but honestly I dont have 6 hours to spend scrolling through the threads trying to pick answers.
Currently truck has all the "bad stuff" done to it, MDP piping kit, No limit intercooler, Fass 240ghp, Water meth that needs hooked up.
I will be doing F1 injectors and a warren CP4 as well as a SDP downpipe and BD exhaust manifolds, O dawg valve covers. Any advice or persona experience would be nice. Id like something with the same or better spool as a stock 15 and hopefully same fuel eco that gets me from 465whp to low 600s since i think 650+ tends to snap rods in these. Thankyou!

J98 · Jun 25, 2021

Many ways to meet your goal. 65.5 streetmax vgt & 10 mm pump will get you near 650, skip the rest and invest in traction bars if you don't already have them.

Put the leftover $ towards a trans in the future.

LaughingSavage · Jun 25, 2021

J98 said:
Many ways to meet your goal. 65.5 streetmax vgt & 10 mm pump will get you near 650, skip the rest and invest in traction bars if you don't already have them.

Put the leftover $ towards a trans in the future.

I have full PMF suspension at the powder coating shop

I've been eying a precision converter but i have an SPE valve body on order.
After calling around more im really digging that 64/68 offered by AP.

sootie · Jun 27, 2021

65mm drop in and a stroker hpfp. You will be north of 650 and have stock spool. Traction bars are a must.

Skip all the other things you mentioned.

ncollins64 · Jun 28, 2021

Hit me up, I’ll get you a package deal on modded vgt turbos with several options as well as Stroker pumps, bars etc.

LaughingSavage · Jun 28, 2021

sootie said:
65mm drop in and a stroker hpfp. You will be north of 650 and have stock spool. Traction bars are a must.

Skip all the other things you mentioned.

I see a lot of votes for MWDP streetmax turbos. Are they that good?
Ive kinda already invested in the other stuff, Do you guys not recommend that stuff because its useless and doesnt do anything for these trucks or because its badly designed and fails?
Also scrap the injectors, There's 0 aftermarket support for them and F1 doesn't do them, I will just buy an OEM new set

sootie · Jun 29, 2021

I abused a streetmax for years and enjoyed outstanding performance and not one issue.

The other items are uneccessary to achieve your goals. If you've already invested in them, no worries, with the exception of the water meth...I wouldn't even let my truck see the kit nevermind install it.

hlejeune6.7 · Jun 29, 2021

I was looking at the SPE 62mm billet vgt. A streetmax is very expensive compared to these but im sure a streetmax is quite a bit more power. SPE claims their strike vgt is capable of 600-650hp, now how true that is for a 62mm vgt I’m not sure...

J98 · Jun 29, 2021

I would not touch an SPE turbo.

LaughingSavage · Jun 29, 2021

sootie said:
I abused a streetmax for years and enjoyed outstanding performance and not one issue.

The other items are uneccessary to achieve your goals. If you've already invested in them, no worries, with the exception of the water meth...I wouldn't even let my truck see the kit nevermind install it.

We are talking about the MP6464-10 right? And hows the spool on those compared to a factory 15 with tuning?
It seems the streetmax is no longer produced and was replaced by the MP6464-10 And MP6668-10 but the MP6668-10 Shouldnt be ran on a stock bottom end

LaughingSavage · Jun 29, 2021

J98 said:
I would not touch an SPE turbo.

What makes you say that? Just quality or?

ncollins64 · Jun 29, 2021

Spe is China made junk claimed to be made here. I’m a dealer for the no limit vgt turbos and also the fleece. Both run awesome as well as the Midwest diesel streetmax turbos.

LaughingSavage · Jun 29, 2021

ncollins64 said:
Spe is China made junk claimed to be made here. I’m a dealer for the no limit vgt turbos and also the fleece. Both run awesome as well as the Midwest diesel streetmax turbos.

Oh really? well im trying to avoid as much oversea's stuff as i can. Whats the opinion on other SPE products? Let's say their valvebody for the 6r140

sootie · Jun 29, 2021

LaughingSavage said:
Oh really? well im trying to avoid as much oversea's stuff as i can. Whats the opinion on other SPE products? Let's say their valvebody for the 6r140

Again...what do you need the valve body for! Stock transmissions hold that power fine.

hlejeune6.7 · Jun 29, 2021

ncollins64 said:
Spe is China made junk claimed to be made here. I’m a dealer for the no limit vgt turbos and also the fleece. Both run awesome as well as the Midwest diesel streetmax turbos.

Anybody ever have any problems with their turbos/fuel pumps?

LaughingSavage · Jun 30, 2021

sootie said:
Again...what do you need the valve body for! Stock transmissions hold that power fine.

Even with all the tuning ive tried my shifts are always kinda soft. 3-4 4-5 shfit flare under WOT. And 1-2 2-3 are kinda laggy, you can feel it disengage and re engage the shifts. Then theres the trans temps. even with an aftermarket cooler a hard pass down the strip it still sees 215-230 temps, I mean comparing it to my 4r100 i built for my v10 truck its nowhere near as crisp or clean.

LaughingSavage · Jun 30, 2021

hlejeune6.7 said:
Anybody ever have any problems with their turbos/fuel pumps?

Right now im at 96k miles on my 15 turbo and pump with about 82k of them being ran with hot tuning from various companies. No failure yet but id wager its about time.

ncollins64 · Jun 30, 2021

I have never bought anything from SPE myself. I’ve had a lot of customers that have bought there cheap faulty products and come to me when SPE’s customer service refuses to help them etc. I will never sale there products. There is plenty of other great company’s out there with great products and service.

sootie · Jun 30, 2021

LaughingSavage said:
Even with all the tuning ive tried my shifts are always kinda soft. 3-4 4-5 shfit flare under WOT. And 1-2 2-3 are kinda laggy, you can feel it disengage and re engage the shifts. Then theres the trans temps. even with an aftermarket cooler a hard pass down the strip it still sees 215-230 temps, I mean comparing it to my 4r100 i built for my v10 truck its nowhere near as crisp or clean.

Even a fully built transmission shifts very very similar to stock.

and these transmissions are designed to run between 230-250