RX7withNitrous

what is the stock boost level on an RX-7 with a street ported engine and a 3 inch dp? What about just a stock engine. no mods.

RX7withNitrous

^

DavidDeco

probably still about 10-8-10. With just a DP I believe you will still be bottlenecked by the cat and catback regardless.

Mahjik

iTrader: (1)

"Stock Boost Levels" are 10-8-10 no matter what. Stock means what came from the factory, so the stock boost levels are 10-8-10.

Now, what boost levels could happen with a streetport and 3" downpipe? Well, as DavidDeco mentioned, the main cat and catback would probably still be the restrictor, so you would probably still be at stock boost levels. Maybe a little higher on a cool evening.

RX7withNitrous

well what about with a high flow cat and cat-back

DavidDeco

probably 11 or 12, much more likely with an Intake, the missing equation here maybe.

I can't speak for sure because my mods were done all at once. I get 16 [robably not healthy...but that's what boost controllers are for.]

Depending on who you ask though that might bring on problems with staying with a stock ECU. Some say it's not necessary if you don't exceed 12 and they may be right.

RX7withNitrous

i wanted to do the blitz dual intake then go with a high flow cat and cat back then ecu.

black99

Most people go intake, dp, cat back...

then ecu and then midpipe..

RX7withNitrous

how much hp does that usually put you at?

DavidDeco

I would *GUESS* that Intake, CB, HF Cat, DP would put you at about 260-270 RWHP. Depending on ECU you might get another 20-30. Then you'd probably jump to a larger IC and get another 10-20. That's when you'd look to upgrade your fuel system and up your boost.

But then again, all that is out my ***

Mahjik

iTrader: (1)

It really depends on the ECU and the amount of boost. Check this thread where they took a modified FD (not sure of the all the mods) and had it hooked up with the stock ECU, and then the Pettit boosting around 13lbs:

https://www.rx7club.com/forum/showth...threadid=97425

Maxboostrx7

damn did you fix your problem?? i get 16psi easily..

DavidDeco

I don't know where to begin. My Profec B is useless - it must not be connected right. I'm usingthe PowerFC to control the boost but it's like Voodoo.

I get 16 really easily, *if* I start off the line and gun it all the way through, and then *Some* other times.

I don't seem to have a transition either....No more pattern...it goes to boost and stays there.

And then sometimes cruising, gunning it gives me no more than 5 psi. I also have a new sound. I'm pretty sure I have still a leak and some other issues.

I got an array of tests planned for this weekend when I can make some time. I can't get my hand on any pattern because there are too many variables I haven't had time to isolate. But with my datalogit now, Wideband, and the PFC I hope to have a fufilling weekend....