Boost Management / ECU Question? - 16PSI Stock Twins 4x 850cc Injectors
#1
Boost Management / ECU Question? - 16PSI Stock Twins 4x 850cc Injectors
Can anyone review this setup and let me know if I am overlooking any key support modification that must be in place to run 16PSI on the stock twin turbos?
Intake Mods:
APEXi Ram Air Intake
ARC Stock Mount Intercooler Upgrade (Small)
Exhaust Mods:
Downpipe - No pre-cat
Racing Beat Cat Back Exhaust
Note: OEM Midpipe w/ Main Catalytic Converter is still in place.
Fuel System Mods:
850cc Injectors x4
Supra TT Fuel Pump 280 lph
Cooling Mods:
Koyo Radiator
ECU/Boost Management Mods:
APEXi Power FC ECU
??????????????????
Thanks for the help!!!!!!
Intake Mods:
APEXi Ram Air Intake
ARC Stock Mount Intercooler Upgrade (Small)
Exhaust Mods:
Downpipe - No pre-cat
Racing Beat Cat Back Exhaust
Note: OEM Midpipe w/ Main Catalytic Converter is still in place.
Fuel System Mods:
850cc Injectors x4
Supra TT Fuel Pump 280 lph
Cooling Mods:
Koyo Radiator
ECU/Boost Management Mods:
APEXi Power FC ECU
??????????????????
Thanks for the help!!!!!!
#2
Long time on-looker
iTrader: (33)
I don't have direct experience with it, but I would think the stock main cat would be quite a restriction at those boost/flow levels.
I'd also say that the 4x 850cc injectors won't provide enough fuel as well. I have the same setup and when I'm at 13lbs on the track (road course) I regularly see peaks of 85% duty cycle.
I'd also say that the 4x 850cc injectors won't provide enough fuel as well. I have the same setup and when I'm at 13lbs on the track (road course) I regularly see peaks of 85% duty cycle.
#3
I don't have direct experience with it, but I would think the stock main cat would be quite a restriction at those boost/flow levels.
I'd also say that the 4x 850cc injectors won't provide enough fuel as well. I have the same setup and when I'm at 13lbs on the track (road course) I regularly see peaks of 85% duty cycle.
I'd also say that the 4x 850cc injectors won't provide enough fuel as well. I have the same setup and when I'm at 13lbs on the track (road course) I regularly see peaks of 85% duty cycle.
Anybody else have experience with a similar setup?
Anybody care to suggest a different injector setup?
#7
Will the PFC be sufficient for boost management????
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#14
Eats, Sleeps, Dreams Rotary
hmm listen to dave a kdr who has been buuilding rotarys when these people were in diapers or listen to some jackass on the internet who probably doesnt even have a rotary.
#16
rotorhead
iTrader: (3)
Just do a search in the Power FC forum, I'm not pulling this out of my ***. If you want the car to run decently you can go ahead and throw the PFC basemap out the window if you go 850 primaries. I'm sure KDR can tune it, but they will run into the same limitations that everyone else does, namely that the PFC will not respond when you try to lean out the idle beyond a certain point.
To the OP, I would recommend you go 550/1680 if you have the money for the new fuel rail (and might as well get an FPR too), or 550/1300. You will probably end up putting in 1680 secondary's anyways if you ever go single turbo. If you do 550/1300 you could get away with relatively simple modifications to the PFC basemap. Avoid bigger primaries of you can. 850/850 is just the cheap route for people who can't afford 550/1680.
#20
I like to double check things out in advance before I commit to changes/installation. It's not that I don't trust him, just that he always seems to have a lot on his mind. I didn't think RX7Club was filled with boy racers. I have read some very intelligent helpful info on RX7Club.
Last edited by s1mpsons; 06-30-08 at 05:03 PM.
#22
Eats, Sleeps, Dreams Rotary
I like to double check things out in advance before I commit to changes/installation. It's not that I don't trust him, just that he always seems to have a lot on his mind. I didn't think RX7Club was filled with boy racers. I have read some very intelligent helpful info on RX7Club.
and thats that..it was just a general statement based on my own experience of running this boost for a very long time. everycar is different. if you get a good tune, use top of the line bolt on parts meaning a good intercooler not some ebay crap, dave does ther work, and monitor your temps i am willing to bet money that you too will enjoy a very streetable and very fast stock twin fd for a very long time. these cars are fun as **** in a maxed out stock twin form with awesome response and can eat up 03 z06s like nothing...leave em!
Last edited by matty; 06-30-08 at 06:43 PM.
#23
Eats, Sleeps, Dreams Rotary
#24
Funny thing is, today when I asked Dave about it he did say the turbos won't last as long running 16PSU. To play it safe, he said, 14PSI would be a much more appropriate. Not sure why he didn't clarify the risks before telling me 16PSI was feasible the first time. Like I said, he seems to have a lot on his mind.
Anyway, maybe I can get 2 maps on my PFC (can they do that?). One 16psi for serious autox competition and one 14psi for street and not-so-competitive autox events.
Anyway, maybe I can get 2 maps on my PFC (can they do that?). One 16psi for serious autox competition and one 14psi for street and not-so-competitive autox events.
#25
Eats, Sleeps, Dreams Rotary
Funny thing is, today when I asked Dave about it he did say the turbos won't last as long running 16PSU. To play it safe, he said, 14PSI would be a much more appropriate. Not sure why he didn't clarify the risks before telling me 16PSI was feasible the first time. Like I said, he seems to have a lot on his mind.
Anyway, maybe I can get 2 maps on my PFC (can they do that?). One 16psi for serious autox competition and one 14psi for street and not-so-competitive autox events.
Anyway, maybe I can get 2 maps on my PFC (can they do that?). One 16psi for serious autox competition and one 14psi for street and not-so-competitive autox events.