Unichip EBC + large exhaust = 15-19 psi
- Thread starter CasopoliS
- Start date
UnNaturalinc
Formerly"HorsepowerFreak"
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- '03.5 MSP, '87 RX-7 TII, '80 Chevy Luv, '05 Honda CRF230
Let's clear something up first (again).... A spike is an unintentional and unwanted jump in boost. What the Unichip is suppose to do (go up to 12/13psi) is NOT a spike. What is being experienced in this thread (19psi) IS a spike.
This has happened with a number of cars before, Unichip and non-Unichip powered. As I've posted a dozen or so times, it's been thought to be the wastegate actuator. It doesn't work properly when boost has been increased.
I have yet to read a fix for this. I would love to hear if anyone has more info on this also. I don't know that if it's been confirmed 100% either.
I've read of people using ProfecB's for boost. Those control spikes.
This has happened with a number of cars before, Unichip and non-Unichip powered. As I've posted a dozen or so times, it's been thought to be the wastegate actuator. It doesn't work properly when boost has been increased.
I have yet to read a fix for this. I would love to hear if anyone has more info on this also. I don't know that if it's been confirmed 100% either.
I've read of people using ProfecB's for boost. Those control spikes.
My unichip will go up to 15psi on its high setting, and go back down to 11-12. So it sounds very similar. I got tired of being "careful" and always watching boost, so I just got a JoeP MBC and set it to 10.
With the MBC, it will go to 11, and go down to 9-10. Based on this, I don't think I have a problem with my wastegate.
I don't even use the boost controller that came with my Unichip anymore, because I don't want to worry about overboosting without enough fuel.
With the MBC, it will go to 11, and go down to 9-10. Based on this, I don't think I have a problem with my wastegate.
I don't even use the boost controller that came with my Unichip anymore, because I don't want to worry about overboosting without enough fuel.
weirdzen said:
yes but I really want to hit 12-13 in the low end where there IS fuel. One of the nice features of the Unichip.
Also, if Josh sent me a new Unichip it would be easier than replacing the valve. The actual modules sit under the glovebox in the open, and just have 1 connector going into them. I would just plug the new module in and mail him the old one. I think this would be easy enough to try, and if it doesn't work then I would look into the wastegate or getting my own MBC.
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- 07 CX-7 GT, 01 CBR929RR
Hey Cas,
Its pretty chilly here, so it has to be up where you are. I gained 2psi on my way home tonight. I turned the EBC off, lol.
Its pretty chilly here, so it has to be up where you are. I gained 2psi on my way home tonight. I turned the EBC off, lol.
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- 07 CX-7 GT, 01 CBR929RR
Im from Cleveland, GO BROWNS!
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- 07 CX-7 GT, 01 CBR929RR
map a or b?, I run map A at 13-15 with no pinging
93 octane of course
93 octane of course
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- 2003 Subaru WRX Wagon, 2000 Miata
rocketr2 said:
or higher octane gas ....
Professor MSP
Member
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- 2003 Black Mica Mazdaspeed Protege
CasopoliS said:
Casopolis, you are indeed correct that replacing the brains would be easier than replacing the solenoid (but the solenoid would still be quite easy to replace as well). I was (incorrectly) thinking that you would have to unplug the harness to the ECU and thus deal with the kickplate in order to replace the brains. I hope this works out.
I still think you should look in to changing out the solenoid next if the new Unichip brain doesn't solve your problem. And if that doesn't work I would make sure the wastegate actuator was in proper working order too in light of Horsepowerfreak's remark.
I must say that I have not had any issues with my Unichip unit (knock on wood). I still maintain that it is my best modification to date.
JBreed said:
Arlington/Ft. Worth line. Its a shame you'll be outta town this weekend. I plan to help out Rich with his new parts.
Just to add- outside temp is about 70* and I was fuel cutting like a mofo on high boost tonight. Definately time to turn it down to 10psi! Hopefully the boost control module's programming is just skewed b/c my IC has less pressure drop than stock. Walked a NA 300ZX w/ exhaust, pulleys and new motor though
I think I experienced the engine rattle at WOT on map B the other night as well (93 oct). I did not know this was detonation. I think my wastegate is fine, my HKS EBC worked just fine. At stock boost control it is fine as well. So for two different boost controlling setups, my boost is fine, so I think the wastegate is ok. This problem only started ocurring when the Unichip was installed. Keep it simple.
I need to talk to Josh and find a local Unichip programmer.
I need to talk to Josh and find a local Unichip programmer.
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- 07 CX-7 GT, 01 CBR929RR
The B map advances the timing, which may or may not cause detonation. Thats why I stick with map A. I would only try Map B on hi boost with 100+ octane. That sucks about local Unichip tuners in Toledo. Ther's like 5 of them around here. One place said he could enable the function to control larger/ additional injectors.
atticus1398 said:
Cinci is close enough for me. I don't know where to get a list of people, that is why I talked with Josh.
I will have to see how MAP A runs.... I have been running MAP B. MAP B was made for 93 octane according to Josh, I couldn't imagine them setting up a MAP for 100+ octane. People run MAP B daily.... Ben for one.
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- 07 CX-7 GT, 01 CBR929RR
I researched it alot. They say somewhere on there site, that the timing may be a little too much for some cars depending on a few things. Map B is prob fine for us in warmer weather. Thats why I just stick with the Map A. During winter, when I go to stock boost, I run Map B. I'll PM you a list of authorized tuners near Cincy. Jack at Unichip said he knows the guy at German Motor Cars. He specializes in Unichipping Porsches. He said theres alot of functions on the Unichip that are not enabled for us: dual stage rev limit, nitrous control, addtnl injector control, etc. Remember not all MSPs are the same. Add our cooler air, and Map B may be too much timing for some.
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mx3ownzj00 said:Arlington/Ft. Worth line. Its a shame you'll be outta town this weekend. I plan to help out Rich with his new parts.
Just to add- outside temp is about 70* and I was fuel cutting like a mofo on high boost tonight. Definately time to turn it down to 10psi! Hopefully the boost control module's programming is just skewed b/c my IC has less pressure drop than stock. Walked a NA 300ZX w/ exhaust, pulleys and new motor though
yeah...10 days. what psi are you turning it down from? what mods do you have ??
