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WR application question or larger turbo

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Old Jan 20, 2007 | 07:44 PM
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WR application question or larger turbo

Since nobody answered my question in a different section, I'll try again.
Got a newb question for you guys. I have a FP WR turbo w/meth kit on the car, and love the quick spool. I really like the idea of quickness over top end speed, and feeling that immediate tq. So my question is, can adding an AEM give me more of what I want, or would I have to upgrade my turbo to something slightly more laggy w/more power? The big question is, is it worth the price of an AEM or would a bigger turbo application be the better route? What should I expect from the AEM?

Side note - I am never going to run race gas in my car, but perfer 100% meth instead.

List of mods are below

Thanks for responding!
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Old Jan 20, 2007 | 08:34 PM
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it's unclear to me what you want. You say you like the quick spool over top end, but then the rest of the post sounds like you want more top end?

I don't think the AEM is going to be a very good bang for the buck on a smallish turbo like the WR. The MAF setup is better below 500 whp IMO.

so just for clarification, are you looking for more torque, more hp, or something else?
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Old Jan 21, 2007 | 05:28 AM
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^^^ Sorry for the confusion. I was basically asking if an AEM would be worth the money for me to add to my list of mods already, and realize the full potential of my turbo setup. Would buying a complete turbo kit w/ "similar" characteristics be more cost/performace effective? This might be a stretch but, what kind of performance benefits does an AEM give? Remember, I am never using race gas just 100% meth.

Hope this helps!
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Old Jan 21, 2007 | 05:42 AM
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You should talk to the guys at Buschurs. They have a lot tuning experience with both system and multiple turbo's. From what I've heard, you may be able to get an extra 20-25whp from the aem.
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Old Jan 21, 2007 | 06:17 AM
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^^Thanks
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Old Jan 21, 2007 | 07:09 AM
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If I lived near Buschur I would go with the AEM EMS in a heartbeat. Talk to them as they have tons of experience tuning very quick cars that run the 20G-9-5, which is very similar to your setup. Almost all the really quick 20G-9-5 equipped Buschur shop and customer cars go with a Buschur tuned EMS.

As for turbo, since you alredy have the WR-8, you might try a couple of relatively inexpensive upgrades: You could have Robert at FP upgrade your VIII compressor housing to a IX compressor housing, which will give you some additional topend w/o sacrificing any spoolup speed whatsoever.

Secondly Forced Performance can upgrade your WR-8 to EvoGreen spec., by replacing the turbine wheel and compressor housing as well, albeit the EvoGreen would sacrifice a few hundred RPM of spoolup, in comparison to your present turbo.

Lastly, if you should decide to go the AEM EMS route and eliminate your restrictive MAF sensor, then you should contact TurboDynamics in England and for about $500 they'll ship you a surge ported IX comressor housing already machined internally for your WR compressor wheel and which sports a large 4" compressor intake. This should actually improve your spool-up as well as your topend, as you would have a full 4" intake path from air filter outlet to turbo.

Last edited by sparky; Jan 21, 2007 at 07:15 AM.
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Old Jan 21, 2007 | 07:31 AM
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there is no magic to an aftermarket ems. you have timing, psi and fuel to play with. the rest of it is trying to mimic stock driveability.
at lower power levels the stock ecu and a boost controller is up to the task. I "believe" an ecuflash is = to an ems.( @ lower power levels)

I have an ems, the WR, big cams, WI and am going back to the stock ecu. In my case because of emission testing in my state, next year I have to pass OBD2.

I have enjoyed playing with my ems to fine tune every area of the drive. Would keep it were it not for the licensing test. It allowed me to play with integrated WI.

Bang for buck / keep the stock ecu

next, possibly buy a used ems and do a lot of the work yourself... IF you enjoy that aspect.
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Old Jan 21, 2007 | 08:15 AM
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I have not seen a aem stock turbo based evo go any faster than an ecu, its all in the tune...add some nitrous...
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Old Jan 21, 2007 | 08:36 AM
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If torque and quick acceleration are most important to you, IMHO sparky and nothere offer the best "balanced" options.
For best "bang-for-the-buck," upgrade WR to EvoGREEN instead of spending even more for an AEM EMS.
Stick with ECUTek retune (if reasonably cheap) or "ECUFlashed" ECU up to 400-450 WHP... AEM EMS (tuned by an experienced tuner) above that level IMHO.

BTW with slightly bigger turbo, even more airflow might be possible with "low duration, high lift" cams. Piper (UK) "Ultimate Road" or "Rally" cam kits seem very effective in producing huge torque output (much more than HKS cams AFAIK.)

BTW with more airflow, one way or the other you will have to upgrade your injectors.
According to FP the minimum size is 680 cc for the EvoGREEN. You may need even more headroom for future mods.

Later on when your wallet recovers, add 2.3 stroker upgrade. That will "fit" your other mods and should give you all the bottom-end torque you ever need for the street.

My $0.02¢

Last edited by nix; Jan 21, 2007 at 08:52 AM.
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Old Jan 21, 2007 | 10:29 AM
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More power

Change the WR8 to WR9 and you will pick up more power. Mine is clipped with no chang over the WR8. Makes alittle more top end power.
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Old Jan 21, 2007 | 11:06 AM
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I would take a hard look at your cams and cam timing to get more punch down low. Have no idea what the FP cams are like?
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Old Jan 21, 2007 | 02:14 PM
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Yeah, these above guys may be right, that the money you'd spend on a standalone might be better spent on upgrading the configuration on your current WR-8 to WR-9 or 20G-LT specs, and look into a camset that'll improve spool-up and torque. Although, granted I am speaking without any knowledge of the FP cams and maybe you just need a set of adjustable sprockets to optimize spoolup.
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