Boost spike :(
 

I tried everything and i keep on spiking. Here's a quick info on my setup.

Precision SC-61
8" JRC FMIC
Precision 880cc injectors
Lovefab shorty log manifold (old school one)
Tial 38mm wg
Hks SSQ Bov
2.5 dp
3" Thermal exhaust
profec B spec II boost controller
AEM FPR
STR fuel rail

Uberdata tuned with P28

Re:Boost spike :(
 

How many psi are you running, maybe that wastegate isnt big enought or isnt getting a good signal

Re:Boost spike :(
 

a 38mm wastegate should be plenty big enough for a stock gs-r at whatever he's pushing, what like 10-12psi?

when do the spikes occur?

id guess it has something to do with the configuration of that boost controller, tried bypassing it yet?

Re:Boost spike :(
 

Right now i can't get it to go past 6psi. I have a ".6bar" spring is what I have been told from the seller.

I tired and tried many different ways.

I took off the Boost controller and I ended up with 5-5.5 psi.
I tried 20 million ways to route my vaccum hoses, but still spiked.

Right now, i have it routed in a way that it doesn't go past 6psi.

I'm almost ready to say that I have a defective boost controller, not sure yet.

Re:Boost spike :(
 

well when you disconnected the controller, and you only got 5psi, did it continue to spike?

if not id say thats most definitely the problem.

Re:Boost spike :(
 

It didn't spike when the boost controller was out the picture.

Re:Boost spike :(
 

problem solved.

could be the way its installed or set up, or it could be defective.

either way, for now just buy a heavier spring for the Tial, and call it a day. They say SS Autochrome's are identical so the spring from one of those off of ebay would probably work if you wanna save a few bucks. I think it was evosol who disassembled both units to show they were the same.

Re:Boost spike :(
 

maybe its the EBC....

Re:Boost spike :(
 

It can't by the way i hooked it up. First time i followed the Greddy diagram and it spiked like a mother.

All other ways yield to 5-6 psi or spiking.

Why woudl i need a new spring? If i have a .6bar shouldn't that work just fine?

Also, what do i search on ebay "SS chrome wastegate spring" ?

Re:Boost spike :(
 

heavier spring will cause the wastegate to open at higher psi, its an alternative to having the other spring you have.

i think an 11psi spring usually opens at 10psi, so he probably gave you a 6psi spring, and not whatever else he claims.

ebay, just search by seller, ssautochrome, advanced search owns
all it really found for me was 8.x and 14.7psi springs.

Re:Boost spike :(
 

I want to open the wastegate and check but i'm having trouble opening it. I'll give it another try soon.

Re:Boost spike :(
 

what is boost spike ???

Re:Boost spike :(
 

:-X ::)

Re:Boost spike :(
 

can anybody tell me??

Re:Boost spike :(
 

You dont have your Profec tuned right. Drop the gain to 2 or 3 then turn up the boost. It wont spike.

Re:Boost spike :(
 

I went to last resort and turned it to zero. STill spiked. Trust me, i tried everything possible.

Oh yah, it spikes to 20 psi sometimes.

Re:Boost spike :(
 

When it goes past the psi it is set for. I'm suppose to be at 9-10, but it goes 15-20

Re:Boost spike :(
 

:o :o :o :o :o :o :o :o :o :o :o

Jesus, I suggest fixing this problem before you blow your motor. :-\

I would start with that EBC.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

Re:Boost spike :(
 

I don't go into boost at all except when i'm testing. Not stupid enough to waste the motor and $4000 lol

Plus now i can't go past 6 psi anyway, :(

Re:Boost spike :(
 

any ideas?

Re:Boost spike :(
 

Drop the gain , and turn up the "SET boost"? I think he has been keeping the gain higher than the set boost. Is that wrong?

Re:Boost spike :(
 

hmm, now that i think about it. I thought i tried it but i'll try this again tomorrow anyway.

How much should i have my set, my gain, and my set gain which is start boost?

Re:Boost spike :(
 

get a manual bc like a real man nukka.. hotrex is on fire this instant.,,,,, aaaawoooooooooo

Re:Boost spike :(
 

ok, this morning i tried putting teh gain down to 20 and my set boost 50 and 70. My set gain was at 50. It still did not want to go past 6 psi. >:(

Re:Boost spike :(
 

What he said.

Re:Boost spike :(
 

I already have this one. I don't want a manual one.

Re:Boost spike :(
 

I just tried every single possibly settings , every possibly connection, and nothing at all.

Stll spikes.
I'm about to call up greddy again and see if i can get some help.

Re:Boost spike :(
 

Dude im not trying to be an ass but your not giving enough good info,anyways it cant be that hard to fix it can only be a few things.From the way it sounds you need to get a manual boost controller, its easier way to go in my book,or a diffrent wastegate spring.It can only teally be the 2 or bad hook up which you said it was hooked up right.Info might not help but good luck. :)

Re:Boost spike :(
 

Feel free to ask questions because i usually forget a lot stuff. But i think i covered it all. I don't see what you need. I told you everything i have. I'm calling greddy again as we speak. I am not gonna get a manual boost controller. I just dont want one. As far as the spring, i'm trying to open mine first and see for sure which one i have, then i'll go buy one if all fails.

Also, a friend of mine is getting brand new one straight from Greddy because his was screwed up and i'm waiting on it to get here so i can test it and see if it fixes my problem or not.

Re:Boost spike :(
 

Yea the boost spike pretty much explains its self sorry.I have a homemade boost controller i made for 2bucks. never had a problem.I would just run with out the controller and run 5.5 unless your goal for boost are higher(prolly are)so just get a diffrent spring? :-\

Re:Boost spike :(
 

I have my gain set to 2 and my set is at 62 I believe for high boost. It works off the percentage of the stock waste gate opens at. Do you have yours converted to PSI?

Re:Boost spike :(
 

yup.

funny how u have ur gain at 2, lol that's what mine is at right now and had the set at 65.

Re:Boost spike :(
 

I finally managed to get in touch with Greddy today, suprisingly they weren't lunching like that last. However, i was on hold for 37 ------- MINS. raarr it was horrible.

But anyway, at the end he said I am not sure, you have to send it in so we can test it. :?

I emailed the provious owner that said it's "brand new" in hope that he can give me some info where he got it from, etc.