RX-7 loving driver

I have a Pettit intake and Racing Beat cat-back, if I get a downpipe would I have to get a new or upgraded ecu?

Dr Wankel

you'd prolly be OK for now but the comp should definately be on the " TO DO" list. Do you have a boost gauge so you can see what the boost is doing?

RX-7 loving driver

Thanks, Yeah I've got a boost gauge. How long do you think I could go without a upgraded ecu?

JoeD

those 3 mods will really be pushin it on the stock ECU. be sure to keep it at around 10 PSI until you get the ECU. all it takes is one cold night and a nice little run...

Dr Wankel

that kind of depends. I think that freeing up the exhaust more coupled with the high flow intake and the CB would cause the boost to raise a few PSI over stock. This will be givin you a 80%+ injector duty.

When I run my car @ 12 PSI (very rarely) I have seen a duty cycle as high as 82%. That makes me a bit nervous, I guess it just comes down to how comfortable you are with running your fuel system closer to its limits.

If you go with something like a PFC for example it should do a better job of controlling the boost. Or at least it will give you the ability to adjust it ( lower it if you are seeing a high duty cycle) untill you can upgrade the fuel system.

Roadracing7

iTrader: (2)

Intake, catback, downpipe... That will be okay on the stock ECU, but I would get an upgraded fuel pump to keep the pressure up as a safety, hell, you're gonna need it later anyway.

Richard

rx7eaven

I would definately look into getting one next. You will need one and it is always better to be safe. $700-$1200 for an ecu or $3000 for a new engine, your call.

RX-7 loving driver

Will a manual boost controller help until I get a new ecu?

RX-7 loving driver

^^bump^^

Dr Wankel

Yes,

as long as you can keep the boost at 10PSI you should be ok you could also try changing out the pills too.