Extra boost from Greddy
07-04-2005, 01:43 PM
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Extra boost from Greddy
I am considering a manual bleed valve as opposed to an electronic boost controller. Not only is cost a consideration, but since I am only after 1 or 2 more #s of boost (whatever the stock injectors can handle), I should be able to dial that in, tune, and leave it alone after that.
Has anyone else gone this route?
Has anyone else gone this route?
07-04-2005, 02:56 PM
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A manual boost controller will alter the boost pressrue but not the boost curve. An electronic controller can alter the boost pressure and curve. In other words, if you have pressure falling off up top now, you will still have boost falling off up top with a manual controller. An electronic boost controller can account for this though.
07-04-2005, 02:58 PM
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What boost level are you looking for ? I have 7.5 lbs. right now without the other controllers. Mechanic said I can probably go to 8 psi on the next go around, without the EBC. Unless you are looking at 10 lbs., then I would also get the upgraded injectors, you probably won't need the MBV or EBC.
07-04-2005, 04:45 PM
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Originally Posted by Fanman
What boost level are you looking for ? I have 7.5 lbs. right now without the other controllers. Mechanic said I can probably go to 8 psi on the next go around, without the EBC. Unless you are looking at 10 lbs., then I would also get the upgraded injectors, you probably won't need the MBV or EBC.
07-04-2005, 04:47 PM
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Originally Posted by rotarygod
A manual boost controller will alter the boost pressrue but not the boost curve. An electronic controller can alter the boost pressure and curve. In other words, if you have pressure falling off up top now, you will still have boost falling off up top with a manual controller. An electronic boost controller can account for this though.
07-04-2005, 05:35 PM
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I am also getting a little over 7 psi without using a boost controller. We just shortened the rod on the wastegate. I also got Denso 1-step colder plugs too, just in case.
I spike occasionally up to 8.5, but I really like my current tune. May get a Profec B installed anyway for future applications.
I spike occasionally up to 8.5, but I really like my current tune. May get a Profec B installed anyway for future applications.
07-04-2005, 05:57 PM
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Originally Posted by rotarygod
Not really. A simple Profec-B should hold boost all the way to redline with no programming.
07-04-2005, 06:15 PM
#9
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Originally Posted by rotarygod
Not really. A simple Profec-B should hold boost all the way to redline with no programming.
07-07-2005, 08:03 PM
#10
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I got a response from Benny....
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Re: E-01 update for RX8 emanage
--------------------------------------------------------------------------------
It might make the boost a little more consistent, but for keeping a steady 7 PSI, the E-01 would be much better. The B Spec II will still drop a little, but not as drastic as stock. The only way to adjust that is with the gain setting on the boost controller. The E-01 actually has an RPM offset where you can adjust the boost at different RPM points.
Benny is Offline:
Registered User Join Date: Mar 2005
Posts: 20
Re: E-01 update for RX8 emanage
--------------------------------------------------------------------------------
It might make the boost a little more consistent, but for keeping a steady 7 PSI, the E-01 would be much better. The B Spec II will still drop a little, but not as drastic as stock. The only way to adjust that is with the gain setting on the boost controller. The E-01 actually has an RPM offset where you can adjust the boost at different RPM points.
07-07-2005, 10:20 PM
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Originally Posted by adrian-1
I got a response from Benny....
Benny is Offline:
Registered User Join Date: Mar 2005
Posts: 20
Re: E-01 update for RX8 emanage
--------------------------------------------------------------------------------
It might make the boost a little more consistent, but for keeping a steady 7 PSI, the E-01 would be much better. The B Spec II will still drop a little, but not as drastic as stock. The only way to adjust that is with the gain setting on the boost controller. The E-01 actually has an RPM offset where you can adjust the boost at different RPM points.
Benny is Offline:
Registered User Join Date: Mar 2005
Posts: 20
Re: E-01 update for RX8 emanage
--------------------------------------------------------------------------------
It might make the boost a little more consistent, but for keeping a steady 7 PSI, the E-01 would be much better. The B Spec II will still drop a little, but not as drastic as stock. The only way to adjust that is with the gain setting on the boost controller. The E-01 actually has an RPM offset where you can adjust the boost at different RPM points.
07-08-2005, 12:51 AM
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This is kind've like the dilemma I am in right now. I am running 7.5 lbs. of boost, and can get about another .5 lbs pretty reliably. In talking with my mechanic, I would need to get the RX8 wiring diagram ($60) & upgraded fuel injectors including the Electronic Boost Controller (Apexi) I have sitting in a box right now. He said unless I'm looking to go to 10 psi, there really is no reason to put this on. When I do that I will have to get the other stuff (injectors). To balance out the top end, it's not really worth it right now. I really like my car at 7.5 psi, not sure I want to run it at 10 psi & sacrifice reliability. Anybody want to buy an extra Apexi boost controller ? :D
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