Mod Advice: MAP 38mm MVS O2 Eliminator Downpipe w/FP Red

churchja · Jul 6, 2009, 01:17 PM

2006 EVO IX MR (Daily Driver)... GOALS: looking for reliable and spirited street and highway driving.

I am planning to upgrade my FP Green to FP Red in the near future. Current mods include: HKS MIVEC cams, 1000cc RC injectors, HKS Hi Power muffler, downpipe, fuel rail, Full Race manifold, HKS DLI II, intake w/cone filter, FMIC, upper & lower FMIC pipes, ECU boost control, GM boost solenoid, E-85, Walbro 225 fuel pump, Titek O2 housing, ACT HDSS clutch with fly wheel, AEM meth injection w/ 91 only, ECU tuned with map switching.

I am considering the following mods:

- MAP Stainless Steel O2 Eliminator Downpipe for Evolution 9 (w TiAL)
- TiAL Q Blow-off Valve (replace stock Evo IX MR BOV)
- FP RED Turbocharger Evo IX (Upgrade) with 80mm surge port, ported
- Buschur Racing Double Pumper Fuel System w/Dual Fuel Feed Line Kit
- Evolution 1200cc Fuel Injectors
- Aeromotive A1000 Fuel Pressure Regulator w/ MAP FPR INSTALL KIT

MAP website says "Remove the internal wastegate flapper from your turbocharger, enlarge the wastegate discharge and bolt up one of these bad boys for the best boost control and elimination of boost creep available!"

Has anyone done this with the FP Red? Thoughts?

Also, the MAP website states, "We use the .9 bar spring pressure for most applications, if you would like a different spring pressure please specify in the notes section of the checkout page!"

Would the .9 bar spring be recommended for the FP Red running E-85 with about 30 PSI of boost?

Is a fuel pressure regulator recommend with this planned setup?

I love my HKS MIVEC cams.... idle is stock. However, would you expect much gains from GSC S2? How about idle and "drivability"?

Thanks for any inputs...

churchja · Jul 6, 2009, 02:53 PM

Bump... Anyone? Thoughts?

churchja · Jul 6, 2009, 10:57 PM

Any thoughts?

16vTAWD · Jul 6, 2009, 11:07 PM

If your not having trouble controlling boost, pass on the ext wastegate.

churchja · Jul 7, 2009, 12:11 AM

Thanks for the feedback... I don't have any problem controlling boost with the current setup.

ChrisCarey · Jul 7, 2009, 10:19 AM

.9 bar will put you at around 14psi minimum boost pressure, the maximum depends on what boost controller you use. With a manual boost controller you can easily hit the 30psi mark, but some electronic boost controllers are only able to double wastegate pressure which would be about 28psi in this case. Thanks for considering our products and don't hesitate to ask if you have any further questions!

dhammans · Jul 13, 2009, 04:12 AM

People seem to be confused what a Wastegate is actually for. The function of the wastegate is to allow exhaust gasses to bypass the turbine wheel. This effectively creates less boost, as you are "wasting" this energy and not using it to drive the turbine wheel (and hence drive your compressor wheel).

The general rule of thumb is the lower the boost you want to run the bigger the wastegate you are going to need. There is no reason you should need an external gate on a turbo such as the FP red, the internal gate is capable of relegating it to very reasonable pump gas boost pressures already. The only reason you'd want an external gate is if you were actually going to try to run 14psi, but who would want to do that?