I know you need really need to run an aftermarket ECU if you change the exhaust system, intake etc. on series 6s, but I'm just wondering if it's any different with series 8s? Does the newer ECU manage, or allow for these changes any better?

 

https://www.rx7club.com/showpost.php...1&postcount=18

 

sounds possible b/c they have better ECU's which are a little smarter and can adjust a bit more being a lot newer....but i wouldn't go as far as to try to drop in a 3" midpipe and not expect some bad results.

 

according to an article I read in a japanese magazine - you have to be _more_ careful with the later versions, as they don't have the same degree of 'safety buffer' that the earlier cars do (due to running more boost, yet not running significantly richer). (this applies to 280ps cars - RS, R, RZ, Spirit R, and the version VI R bathurst R).

PFC is always a good mod to get in early.

 

would it be a good idea to fit a PFC to a completely stock series 8 seeing that our aussie fuel is not up to par with the japanese fuel?

 

haha looks like i had it backwards...in that case its VERY important to get the ECU and cooling stuff done before power adders!

and daioni, how much PSI do the series 7/8's run?

 

when are people going to stop subscribing to the whole "you need an ECU bit"

 

montego, put an intake, intercooler, 3 inch catless exhaust system, boost controller, give it a couple extra PSI, don't touch your ECU and go drive your car hard and get back to us on how your motor held up from the boost spiking and detonation.

 

That's the key. The original poster never said anything about increasing boost, he just asked about upgrading the intake and exhaust.

There have been tests done with the US spec ECU's with respect to mods at the stock boost level. The later version RX-7's had increased stock boost so it's unsure if at that level they have the same amount of safeguard built in to take all the flow mods without adding fuel.

I haven't seen anyone abroad get the same data as Wade compiled to prove or disprove what the new ECU's can or can't support.

 

Thanks for all the info guys. I really don't want to change the ECU over so I guess the stockie will just have to do (boring I know...)

 

Try this on for size

STREETPORTED MOTOR
M2 COLD AIR INTAKE
PFS SMIC
DOWN PIPE
MIDPIPE (yes a freaking midpipe)
Stock Catback

^^ Ran like that for over a year I WOT whenever I felt like it. Which is all the time lol

Then I added a MAGNAFLOW CATBACK ran for an additonal month, same thing WOT without fear.

Finally I got my Power FC tuned it, turned up the boost to 12 psi. Then finally I got my RB dual tip (the magnaflow was a loaner from my mechanic).


Why didn't I blow up? Because I'm not stupid. I would never turn up the boost on a stock ECU.

 

I'm realy getting tired of typing this but if it saves someone's engine then it worth it.

Monitor your boost. Do everything you need to do to keep the boost levels at 10 psi (NO spikes, NO creep). That is the key to being safe.

 

I agree with Montego , try to keep the boost down , not more than 10 psi , when you change the exhaust you gone rice the turbo boost , so , you have to get it down to the stock boost again,

To do that you havo to change a regulator that is insert inside of a hose who is connected to one of the weategate who are in the front of the turbo.

You gone get more power at the same turbo boost.

 

but these days you can buy a PFC for US$650 - there's your boost control, tuning capability, and a shitload of monitoring capability - all in one. Why wouldn't you buy one???

do it properly the first time.