Forced Performance Evo Red Turbo data
Evolving Member
Joined: Aug 2007
Posts: 143
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From: WALES
Just food for thought. DB posted Trents RPM/BOOST at 3656@20psi. Mine was 4125@20psi. That's nearly 500 RPMS slower to get to 20 psi. Probably manifold talking. Now, Trent's car made 27psi @ 4387, Mine made 27 psi @ 4415. Our new build nearly made up for the difference by the time they both hit 27 psi. Not sure for the reasons, but accelleration rate of the engine, airflow, etc. Just good things to consider. The lag doesn't last very long with the new Wilson Manifold.
Added: Thats a 7 psi gain in 300 RPMS. Hope I looked at the numbers right.
Added: Thats a 7 psi gain in 300 RPMS. Hope I looked at the numbers right.
GS1 cams
Forged rods and std pistons
3" decat miltek
APS fmic
had much laggier would it be compared with the red set ups already?
20psi @ 4500rpm?
all help would be kindly received.
Last edited by addo; Jul 17, 2008 at 04:23 AM.
Can't you differentiate without looking at your hole(s)? The dual and single flapper valves are distinguishable externally without the need to check hole(s) which can get kinda messy. The single flapper is by definition a single circular disc valve. The dual flapper has two smaller discs, whose circumferences merge at the center, giving it an ovreall oblong shape.
Last edited by sparky; Jul 17, 2008 at 05:26 AM.
Can't you differentiate without looking at your hole(s)? The dual and single flapper valves are distinguishable externally without the need to check hole(s) which can get kinda messy. The single flapper is by definition a single circular disc valve. The dual flapper has two smaller discs, whose circumferences merge at the center, giving it an ovreall oblong shape.
But if you have an OEM turbo, the VIII's are a 9.8 twin and the IX's are a 10.5 single. The only 10.5 twins I have seen have been jdm variants or upgrades done after the fact.
You could normally tell by the turbo model number, but there are so many custom variations out there that you wouldn't be 100% guaranteed.
But I really don't think all of this matters too much as the perfomance difference will be minimal, if any.
Sorry if these pics were previously posted, but maybe it's a good time to repost them anyway.
The Forced Performance RED is on the left and the GREEN is on the right. The double flapper is on the RED, whereas, the GREEN we used was a single design.
The Forced Performance RED is on the left and the GREEN is on the right. The double flapper is on the RED, whereas, the GREEN we used was a single design.
9sec9 FP EVORED Model Turbocharger had a twin flapper on it because that is what I had around when I was prototyping these turbos up. There isn't a reason to select a twin over a single. MHI changed to the single when doing a round of vehicle updates in about 2005, but I beleive the reason to be an improvement in longevity and better long term flapper sealing, not any type of performance difference. Just a simpler way to make the part that also improved the service life of the part.
All production FPEVORed turbos feature the new style single flapper housing.
If you want to ID the single flapper hosing with the turbo on the car, look at the turbine inlet flange of the turbine housing. The single flapper ones are lighter due to a larger semi circular cut out just above where the heat shield bolt boss is on the radiator side of the turbine housing.
BOOST ON!
Robert Young
All production FPEVORed turbos feature the new style single flapper housing.
If you want to ID the single flapper hosing with the turbo on the car, look at the turbine inlet flange of the turbine housing. The single flapper ones are lighter due to a larger semi circular cut out just above where the heat shield bolt boss is on the radiator side of the turbine housing.
BOOST ON!
Robert Young
With that in mind and im not sure on your engine specs, but my own Evo is very mildly modded without any head or manifold porting/flowing, so what spool would you expect on a car with my spec;
GS1 cams
GS1 cams
BOOST ON!
Robert Young
Robert, there's no cutting in line when it comes to getting a RED is there? I just spoke with GrocMax. Also, I'll sell you back my RED, for a price, since it's a rare breed now. First, let me abuse it a LITTLE.
Will there eventually be a price for a IX turbo conversion to a Red?
Also I have been trying to cover all the red threads but there hasn't
been any mildly modded cars with spool characteristics yet?
Also I have been trying to cover all the red threads but there hasn't
been any mildly modded cars with spool characteristics yet?
Considering it flows 60lbs/min, I'd suggest at least 850cc injectors if not larger if you're planning to take it to its' limits and keep IDC's somewhat within specs. Don't think you would need a double pumper but its always a good idea when making 500+awhp.
Last edited by inco9nito99; Jul 17, 2008 at 11:07 AM.
