Will going non-sequential "cure" boost creep issues??
#1
Rotary Freak
Thread Starter
Will going non-sequential "cure" boost creep issues??
I finally got all the bolt-on-power upgrades installed... With the recent addition of the Hi-flow cat(n-tech) I again have boost creep/spikes to - beyond 15psi(not good) when my secondondary kicks in. I also have little to no boost in 1st & 2nd gear(see other post)
My question is: If I convert to Non-Seq will I still have boost creep due to the increased flow? Or does non-seq. eliminate this? My guess would be no? But then again, I don't know sh%t...
Will I still have to port my wastegate?
John
My question is: If I convert to Non-Seq will I still have boost creep due to the increased flow? Or does non-seq. eliminate this? My guess would be no? But then again, I don't know sh%t...
Will I still have to port my wastegate?
John
#2
5yr member, joined 2001
You haven't ported your wastegate with those mods?! You're problem is that you have WAY too much exhaust for the stock-ported wastegate to handle and thus your turbos continue to spool up even when your wastegate is wide open.
#3
Rotary Freak
Thread Starter
Originally posted by JONSKI
You haven't ported your wastegate with those mods?! You're problem is that you have WAY too much exhaust for the stock-ported wastegate to handle and thus your turbos continue to spool up even when your wastegate is wide open.
You haven't ported your wastegate with those mods?! You're problem is that you have WAY too much exhaust for the stock-ported wastegate to handle and thus your turbos continue to spool up even when your wastegate is wide open.
Did you port your own waste gate or did you have shop do it? How much does it ususally cost have someone do the porting?
John
#4
5yr member, joined 2001
My only mods are gutted pre-cat and Pettit AST. Since this car is my daily driver, I don't want to worry about the issues that tag along with performance upgrades (e.g. boost creep). If you want a temporary fix for your boost creep, then you need some back pressure to slow down the exhaust flow. The stock cat-back and/or main cat would do nicely, if you still have either of them. Getting at the wastegate is no light undertaking. Some people pull their engine to get at the turbos. If you have never worked under the hood before, then have a shop port it for you. I have no idea what it would cost, though. If you are intent on doing it yourself, then find a willing enthusiast who has done it to help you, but try an easier project first, like the air box mod or AST replacement.
#6
Passenger
Posts: n/a
Originally posted by jspecracer7
JONSKI's correct. I am one of the few people who is ALSO going to pull my engine to get at my turbos.
JONSKI's correct. I am one of the few people who is ALSO going to pull my engine to get at my turbos.
#7
Rotary Freak
Thread Starter
OK, I've done some research. Porting the wastegate is the best way to stop boost creep. However, you have to remove the turbos to get at the internal wastegate. Too big of a job for this newbie... So I called a local roatry shop to see how much they'd charge. Homie said it would take around 7-8 hours at $80 bucks=$500-600!
So after much searching and Pming(*thanks Rikki), I've decided to try a restrictor plate. Basically, a metal plate that goes in between the hi-flow cat and the cat back with a smaller diameter hole cut into to it to restrict the flow of the exhaust gas.
Before I go build one, does anyone have an extra restrictor plate lying around that they would give/sell to me????
John
jpandes@hotmail.com
415-609-2341
So after much searching and Pming(*thanks Rikki), I've decided to try a restrictor plate. Basically, a metal plate that goes in between the hi-flow cat and the cat back with a smaller diameter hole cut into to it to restrict the flow of the exhaust gas.
Before I go build one, does anyone have an extra restrictor plate lying around that they would give/sell to me????
John
jpandes@hotmail.com
415-609-2341
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#8
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You have another option. You could sell your M2 for a PowerFC instead, then you will be able to run an open mid-pipe and not have to worry about a restrictor plate.
That's what I did, I had horrible creep with the M2 and I had to use a restrictor plate. So I bought a PFC instead and I get the EXACT amount of boost every time, it controls it very well IMO.
If you want to try a restrictor, try this , it worked well for me: http://www.jegs.com/cgi-bin/ncommerc...71&prmenbr=361
That's what I did, I had horrible creep with the M2 and I had to use a restrictor plate. So I bought a PFC instead and I get the EXACT amount of boost every time, it controls it very well IMO.
If you want to try a restrictor, try this , it worked well for me: http://www.jegs.com/cgi-bin/ncommerc...71&prmenbr=361
#9
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Originally posted by Dont_Be_A_Rikki
why I can have the turbos of within a 1 1/2 or so not the bad! just use power tools and a nice torch to heat up some seized up botls and swivel sockets and your money not that hard just need a set of spare hands. but in J's case you have the steering in your way so it might be a little more tricky!!!
why I can have the turbos of within a 1 1/2 or so not the bad! just use power tools and a nice torch to heat up some seized up botls and swivel sockets and your money not that hard just need a set of spare hands. but in J's case you have the steering in your way so it might be a little more tricky!!!
#10
Original Gangster/Rotary!
iTrader: (213)
Originally posted by Pressurized
You have another option. You could sell your M2 for a PowerFC instead, then you will be able to run an open mid-pipe and not have to worry about a restrictor plate.
That's what I did, I had horrible creep with the M2 and I had to use a restrictor plate. So I bought a PFC instead and I get the EXACT amount of boost every time, it controls it very well IMO.
If you want to try a restrictor, try this , it worked well for me: http://www.jegs.com/cgi-bin/ncommerc...71&prmenbr=361
You have another option. You could sell your M2 for a PowerFC instead, then you will be able to run an open mid-pipe and not have to worry about a restrictor plate.
That's what I did, I had horrible creep with the M2 and I had to use a restrictor plate. So I bought a PFC instead and I get the EXACT amount of boost every time, it controls it very well IMO.
If you want to try a restrictor, try this , it worked well for me: http://www.jegs.com/cgi-bin/ncommerc...71&prmenbr=361
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