rt turbo

im still experiencing troubles boosting faster than 5000 rpms and i get a boost ocilation/ noise at 5-8 psi when boosting up. the noise is a ssshhhppp sssshhhpppp shshhpp and the car bucks some when the bost moves up and down. i went to rotorsports and they said it could be the seq. solinoids and flaps closing/opening under partial boost up. i wire tied the flap open on the Y and i still get it. with the windows open today i noticed i think i hear it from my side of the car, i it check the bov, its fine and the ic piping. its fine. then i noticed the seq. solenoid on the throttle body is not tied open and is easy to move open and closed with your hand. i have yet to tie it open and see if this works. i want to remove all the flaps, i dont understand why it wasnt done when i bought it. but oh well. at this point, if this doesn make it go away, im gann a look into wastegate for trouble shooting. it does sound like its being pushed open or flapping under boost up. i dunno. i cant wait until summer when i can afford a single and bypass issue all together.

rt turbo

forgot to ask, the solenoid on the tb for the seq flap... is the flap open with the rod from the valve extended or pulled into the solenoid?

rt turbo

well, i tied it and nothing. still does it. my car would boost over 1000 roms faster if it didnt do this. i really think its a wastegate or a wg controll issue. maybe my greddy profect b has gone bad?? it doesnt seem to be working right. but it does sound like gasses whether exhaust or boost is maybe leaking at one point. i guess i should go back to rotorsports and have them take a ride around the block in it.

rt turbo

i guess no one has any input

rt turbo

arg, now im experincing spark break up i think... at full boost-12 psi, car shudders while acellerating the boost gauges registers a slight ocsillation from 11.5 to 12 psi. nice. one thing after the next. ohh well. new plugs and twin ignition i suppose is in order.

Fd3BOOST

iTrader: (7)

Dude you are all over the map.
First off are you running the twins non-sequential now? If so then who set it up non-seq for you and when? If recently was the car running properly before the change was made?

Also just as a piece of advice you need to be patient. It might take a while for someone who could shed some light to read your thread. It also helps when you include some basic info about your car other.

rt turbo

i bought the car with it already non sequential. i kinda jumped into this thing half mast, and i need to rework some things i know. thats whats so hard about it. there is a rx7 meet here inb charlotte in a week. hopfullly someone will know there or i willl have one of the guys at rotorsports will have an idea. the boost problem feels like something with a spring because it sounds like somethng closing and opening. i dont thin its the bov, im thinking wastegate. maybe the spring is worn out.


mods are fuego racing built motor w/ atkins 2mm seals, mild street port.
non seq
fmic
greddy type s
fluidine rad
pulleys
supra pump
1600cc 2nds
aeromotiv fpr
PFC
greddy profect b
cltuch
lwfw
3.5 inch turbo back exhaust
twin intakes
etc, etc

BigIslandSevens

iTrader: (4)

where are you at in charlotte. I live a couple hours from there. If you wanted to come here or meet me somewhere on a weds. or a sunday i would not mind helping you get your car running properly in either form. Seq. or NON-seq.

Let me know by PM or whatever.

It sounds like it was set-up wrong to start with. With something not capped off or wired open. Maybe the pre-control flapper on the turbo. It would be way easier in person

rt turbo

yes, that is true. im definatly thinking its the turbos not set up correctly in parralel. this next week will be tough for me to go anywhere because ive got work and am going to jackson hole for one last week of snow. i have tied all the boost pipes open including the flapper in the Y pipe, and in the throttle body. i havent checked the flapper in the exhaust manifold. but i have thought that it could be that opening and shutting. the noise i hear when it happpens sounds like something is blocking & eopening the boost, or exhaust pressure passage. sounds like a sssshhhkk sshhhkk shhhkkk. then it goes away and makes full boost until spark breaks up. thats why i dont think its a boost leak.

Fd3BOOST

iTrader: (7)

It is hard when the car was jacked up to begin with. I'd start by back tracking the steps. I'll post the link for the poor mans how to. I would go through each step as though you were doing it the first time. At least you can eliminate the possibility that the mod was done incorrectly. I would make certain that the precontrol flapper door was wired completely open (forward).

Sorry for the cross link but what can I say.
http://www.nopistons.com/forums/inde...howtopic=38640

rt turbo

sweet, il go through that today. im not sure if the flapper in the manifold has been welded or aken out, it may be flapping away. i dunno.