question about downpipe and ecu . PLease help
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question about downpipe and ecu . PLease help
I have a 94 Rx7 with apexi intake, PF catback, power pulleys and double friction clutch. 54K w/ original engine.
Im thinking of getting a downpipe and a radiator next.
People say that I will need a new ECU to put a downpipe in it but is it really essential? Also, members have been saying radiator and downpipe are important reliability mods due to all the heat in the engine bay. Is this a fact or an opinion? Please help me with your expert suggestions. Thanks guys
Im thinking of getting a downpipe and a radiator next.
People say that I will need a new ECU to put a downpipe in it but is it really essential? Also, members have been saying radiator and downpipe are important reliability mods due to all the heat in the engine bay. Is this a fact or an opinion? Please help me with your expert suggestions. Thanks guys
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The downpipe IMHO should be everyone's first mod. It might be cutting it a little close with the catback and intake, but people have gotten away with more. It is up to you, but if you do it, be really careful on cold nights.
#3
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Well, read through this:
http://www.scuderiaciriani.com/rx7/reliability.html
As far as an ECU? The ECU is really needed when you begin to boost OVER stock boost levels. Normal boost pattern is around 10-8-10 (from the 3rd gear boost test).
When you start getting boost levels higher than 10 PSI, the stock ECU will not be able to compensate for the extra air into the Air/Fuel ratio. Therefore, you need an upgraded ECU to help add more fuel to help even back out the Air/Fuel ratio at higher boost levels.
Basically, you can add the downpipe and you will be fine as long as you keep the boost level at/around stock boost levels.
http://www.scuderiaciriani.com/rx7/reliability.html
As far as an ECU? The ECU is really needed when you begin to boost OVER stock boost levels. Normal boost pattern is around 10-8-10 (from the 3rd gear boost test).
When you start getting boost levels higher than 10 PSI, the stock ECU will not be able to compensate for the extra air into the Air/Fuel ratio. Therefore, you need an upgraded ECU to help add more fuel to help even back out the Air/Fuel ratio at higher boost levels.
Basically, you can add the downpipe and you will be fine as long as you keep the boost level at/around stock boost levels.
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The M2 ECUs, are they reliable? How much powergain should i expect from a downpipe and a M2 ecu ? Thanks
Last edited by akathugs; 07-22-02 at 04:10 PM.
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You can get a used urgraded ecu for 300-400 bucks. The cold night thing is because when it is cold outside it makes your intake charge cooler and thus denser. You run more boost and at lower temperatures. It's like running an upgraded intercooler. Just keep the boost at stock levels and you *should* be alright.
#6
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Originally posted by akathugs
The M2 ECUs, are they reliable? How much powergain should i expect from a downpipe and a M2 ecu ? Thanks
The M2 ECUs, are they reliable? How much powergain should i expect from a downpipe and a M2 ecu ? Thanks
https://www.rx7club.com/forum/showth...threadid=97425
#7
Stock boost = all good. keep it at 10-11 psi and you should be fine. If it goes 13+psi you will need an ECU. Iam not sure it will be stock when you put the DP on. The intake with exhuast is the thing that really wants to make that boost creep.
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Does ECU tuning count towards reliability mod?
Wouldn't it shorten the life of my engine if to much power is added? Thanks for all the quick responses.
Wouldn't it shorten the life of my engine if to much power is added? Thanks for all the quick responses.
#9
ECU tunning is the most potent factor in reliability. Stick with the plug and plays until you buff up on standalone units. Its a rareity to here a blown engine on re-programmed ECU's. More power always shortens engine life, its up to the tunning to say how much damage will be incurred. Rich=little hp loss, leanER= more hp less room for error. Also timing plays a factor.
#10
Mr. Links
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Originally posted by akathugs
Does ECU tuning count towards reliability mod?
Wouldn't it shorten the life of my engine if to much power is added? Thanks for all the quick responses.
Does ECU tuning count towards reliability mod?
Wouldn't it shorten the life of my engine if to much power is added? Thanks for all the quick responses.
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So more power means more heat right? so do you recommend getting a radiator at the same time? Or can i getaway withit? (I've never had overheating problems)
I live in the Northeast coast where I have full four seasons. Thanks
I live in the Northeast coast where I have full four seasons. Thanks
#13
Mr. Links
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Originally posted by akathugs
So more power means more heat right? so do you recommend getting a radiator at the same time? Or can i getaway withit? (I've never had overheating problems)
I live in the Northeast coast where I have full four seasons. Thanks
So more power means more heat right? so do you recommend getting a radiator at the same time? Or can i getaway withit? (I've never had overheating problems)
I live in the Northeast coast where I have full four seasons. Thanks
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