BoOsTin FD

Can anyone please tell me the correct boost pattern for
1st gear
2nd gear
and 3rd gear

i usually get 10-8-8 in 3rd gear but others it's different.

Also, this i have asked milion times. Am i soppose to have 8 psi till redline or 10.

I get 8 after like 5, 5500

Thanks

rynberg

Before I got my Profec B boost controller, my boost was 11-8-10 then dropping to 7 at 6000 rpm and holding til redline. Now that I have my Profec, it usually holds 9 psi until redline. It's noticeable that it pulls harder to 8k.

Note that these boost levels are with stock intake, downpipe, stock cat, and RB dual-tip.

BoOsTin FD

well you can see my mods and i should be able to have 10 psi till redline, however i still need to know boost patterns on 1st and 2nd gear.

thanks for reply

T88NosRx7

iTrader: (1)

boost was pretty unstable for me, I would get 10 untill about 6k then it would go to zero.

BoOsTin FD

What does all that mean?

I need a straight answer from somebody that knows this stuff. Because this boost thing is killing me.

BoOsTin FD

So nobody knows???

racerfoo

do what i did, go non-seq...took me about 20 minutes to do, and i couldnt be happier.

RX7Elmo

i get 10-10-10 for 1, 2, 3 gears. For 4th and 5th, i get a pattern of more like 10-10-11.

It REALLY depends on the weather for me regarding my boost. Cooler temps gets different pressure etc.

danny

Killuminatic

what is the correct boost for a stock engine tho?

BoOsTin FD

So I am soppose to have 10 psi till redline? Man that sucks. Where should i start looking for this problem then. I guess my problem is with secondary turbo then. It just won't hold boost till redline.

Can someone give me everything i should check that is related to second turbo. And how to check it? I do get 10 psi on primary so i know there isn't any common leaks like couplers or 1inch hoses. I also did vaccum hoses thing so i don't think it's that either. It's probably one of the check valves or sollenoid. But which one?

Thanks

rynberg

There is nothing that says you are supposed to have 10 psi until redline. The stock ecu just blindly actuates the wastegate, which is why I was only getting 7 psi after 6k rpm. I would think you would have an easier time keeping near 10 psi til redline with an aftermarket intake but there are no guarantees. You may have a small leak somewhere but I doubt there's a problem with any of your solenoids or rat's nest hoses if you are getting a solid pattern every time.

At the worst, perhaps your main cat is slightly clogged. But then again, there might not be anything wrong with your car at all.

As far as boost pattern in other gears goes, I get the same pattern in every gear except 1st where the primary spools up slower due to gearing. The only way I can verify the 1st gear boost pattern is by recording it with my Defi gauges and playing it back. Otherwise, it goes by too quickly (actually, so does 2nd....).

BoOsTin FD

Well i do think that i might have small boost leak, but i'm still not sure. I never saw 10 or 9 psi till redline it's always either 8 or 7.5 something like that.

Even if i switch it to 12 psi i get like 12-8-8 or something similiar. So i'm sure something is wrong i just don't know where to start.

Thanks for reply

BoOsTin FD

I thought about going no seq but then i haven't driven one that has been done that way, so i don't know how it feels. I like the way my car runs now. primary spools really fast and strong.

Again, if i have something to compare to, maybe i would do it, but then again, who knows.