Please note, 4400-4700 is my best guess. The SS housing has huge inducer ports, just like a T3 housing. It is not a twin scroll, so up top, there is less backpressure. The UHF makes up some lost spool by going to smaller housing.
Similar to this same idea, the FP54 uses 9 blades instead of 11 and going to smaller housing. But 9 full blades should spool better than 5 tall and 5 short (aka UHF). The UHF can't be compared to FP54 yet since UHF isn't available in MHI housing yet. My guess is both the 9 blade and UHF will perform very close, so what will dictate will be characteristic of CW (flow vs rpm). Can't go wrong with either in Green form. Please don't go around saying UHF is a better design because every combination will perform differently, especially on bigger turbos where you may need the bigger blades to rotate assembly.

 

When I build turbos for people, I get a feel on their whole setup to pick the parts to help their car perform best and closest to what they are looking for. The answer to your question will be based on owner's preference on further upgrades later (if yes, then go Red, if this is last mod, then UHF Green). In addition, if their evo doesn't have FBO and wants to hit the FBO Green's whp, then they need Red to make up inefficiencies. Also, sometimes people have bad combinations like using S3 cams. A Green will help make up low end power for street while Red will shine up top. So back to owner's preference. These variations are there so that we can pick the turbo that best fits our plans.

 

Evo8, stock motor, GSC S2's, MHI BB red HTZ. On a mustang dyno.

The UHF green results don't make sense, or it isn't that good.

 

Those are solid #’s for mustang dyno ! Red line e85 and blue pump gas I’m assuming?

 

Both E85, high numbers are 32psi taper to 27, low numbers were like a flat 23-24psi for track days.

 

The test car isn't some street car that does a few rips now and then. Running a stock block with that much low-rpm torque on a roadcourse lapping day or a rally stage and you're asking for trouble. I'm going to guess the team cares a lot more about winning than a few missing ft/lbs at an rpm they don't use a ton.

I agree though, the comparison is a silly one that doesn't make much sense.

 

My car is hardly "some street car" that does a few rips "now and then". It ran the low boost tune for many many many many track days and autocross events (with dual drivers), and I actually had it turned up closer to the high power tune for a few times attack events and track days. And its life on the street was not an easy one at 400wtq.

YMMV, but the dyno graph being touted as showing how great the turbo is, really tells me it's not that great.

 

I was street tuned by TSC about a month ago with this turbo and I'm pretty happy with it on my stock 2 liter Evo 8. It has:

FP UHF Green (Xona bb chra, ss housing)
FIC 1650s
Twin 255s
Stock Ecu flex fuel and speed density
3 port ebcs
JMF IC and piping (lower/short upper)
Tial Q BOV
STM DP with VTA 38mm WG
Test pipe and STM stainless exhaust
GSC S2 cams/springs/retainers
Curt Brown ported intake mani and
S90 70mm TB
Kigley HLA
ARP L19 head studs
STM bellmouth intake
FP cast exhaust manifold

This pull was reading around 72% ethanol, temp was around 82 degrees and was a pretty smooth seemingly flat section of highway. It's just a VD graph for now so take that for what it's worth. Still looked pretty nice with smoothing 2. Boost takes a brief ramp up to about 28-29 psi above 7k. Started the pull around 2500 as you see, and hit 20 psi right around 3900-4k rpm. Not bad for an SS housing I suppose?

 

Well done, thanks for sharing your results. Nice flat torque curve once it’s on song.

 

I though it was the least I could do! I figure there's a few anxious people left that still have interest in these turbos and may have a very similar setup to mine. I will set up a dyno jet session at a local shop to see what it makes there for comparisons' sake. Stay tuned.

 

Fantastic news redSLed, good luck with it, I’m really looking forward to your results.

I’m envious of your intake manifold, I had one here in Oz that I was going to send into Curt. What a great bloke for our 4G63 community, what a massive loss to his family & friends.

You have no doubt spent some time looking into your modification path, I’d be happy with your parts selection. I may have gone with the FP54 Green, though I’d be worried about the massive torque down low on E85. Maybe you thought about that as well lol.

 

Thank you for this, there was a bunch of possibilities but no real data to align it. I have a similar setup to yours including a Curt Brown 70mm intake manifold. Only differences, I went with the STM HFC, Map Tubular manifold, HKS exhaust cam gear and mivec, besides that we’re dead even . Should have some results by next week with RRT.

 

Indeed I was lucky to have my manifold done by Curt. This was a small handful of months before his accident. It added hp and tq when I first installed the intake/s90 setup with my prior SS fp red turbo. I added a little fuel and VD showed gains of around 20-25 tq and 20 hp!

I strongly considered the FP54 wheel in the SS housing but the difference is likely minimal from what Robert and gang told me. The xr57 shouldn't give up much in the spool department to the 54 but benefits from reduced backpressure. We could've fairly easily made 450 wtq with this turbo had we let boost touch that 28 psi mark by 4500 rpm or so! This turbo would be rad with a built engine - high compression 2, 2.1 or 2.2 liter and good fuel of course 🤙

 

Ah man, that's exciting! I'm looking forward to seeing how the MIVEC plays with this turbo. I'm sure you'll see some improved spool up. Other than that it should pretty much be a wash. Obviously you're on a dyno. I need to get on a local DJ and see where I'm at. Unfortunately I've never been on this dyno before and have no comparisons on what a stock or near stock Evo 8 makes on it. Stay tuned.

Please do share your results as you get them!

 

Will do, currently waiting for a slot to pull my car in. I’m optimistic for next week. Here’s a pic of the engine as we finish up the build.