dezz Posted September 13, 2006 Share Posted September 13, 2006 Ok guys heres the problem... Ages ago when my car was stock, I did the high stage boost mod found in the DIY section (constantly grounding the solenoid to override the factory low/hi boost mode of 5psi and 7psi after 4500rpm) As far back as i can remember, it worked just as it was supposed to, and saw 7psi constantly. After fitting my exhaust, I got the common ~2psi gain, and the car would boost to 9psi with nothing other than a full 3" exhaust (no boost controller) A while ago now I noticed it was spiking to ~11psi at 4500rpm, just like the standard solenoid used to do with the 5/7... I thought fitting a boost controller (the manual JRD one with the massive thread on SAU) would fix it, as it completely bypasses the stock solenoid We put mine on, and got it to hold 9-10psi... My problem is, that even though i had the low/hi boost thing disabled before having the controller put in, my car is still spiking at 4500rpm! now the problem is, that it will spike to ~12/13psi after 4500rpm. Was hoping it was fixed with the installation of the MBC, but now its 9-10/12-13!!!!!! im obviously not driving flat out atm so it wont hit over 10 anyway, but I need to fix the problem so that i dont kill my stock turbo with going over 13psi, and so that I can move forward mods wise...looking to fit fmic/pfc and tune shortly, but cant do that with this current issue. Anyone got any ideas of what might be causing the spike, which happens SPOT ON 4500RPM, even though the solenoid has no hoses going into it, and is completely disconnected at the plug anyway...? Sorry for the long winded post, but it should have all the neccessary info on whats happening for someone to take a stab at diagnosing... Thanks in advance Dezz Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/ Share on other sites More sharing options...
Bliksem Posted September 13, 2006 Share Posted September 13, 2006 probably linked to the cams changing over Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2491136 Share on other sites More sharing options...
dezz Posted September 13, 2006 Author Share Posted September 13, 2006 probably linked to the cams changing over So why am I the only person having this problem? Its a pretty big problem when you think about it....12psi being the limit of the stock turbo...and thats with a fmic or decent smic...I'm still running the stock cooler, hence setting it at 9psi... Also the fact that with this spike, I can't really get my car tuned (once i get my fmic and pfc) as it'll spike to ~13psi once they pass 4500rpm, which they will obviously do to tune it... Surely there's a way to fix this Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2491149 Share on other sites More sharing options...
13thracer Posted September 13, 2006 Share Posted September 13, 2006 you may be having the same problem as myself. i started a thread about 2 days ago under the title "boost creep" some may be related to your issue so have a read Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2491504 Share on other sites More sharing options...
dezz Posted September 13, 2006 Author Share Posted September 13, 2006 will do. thanks Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2491509 Share on other sites More sharing options...
mad082 Posted September 13, 2006 Share Posted September 13, 2006 hey dezz, so you are the one justin was talking about. it may be due to your dump pipe. they will slightly move on the turbo after time. it may have twisted to 1 side slightly and now is fowling the wastegate or the wastegate airflow slightly, and then when the cams change over (and it starts dumping more air out) it is causing the boost increase. my advice would be to take the dump pipe off and make sure the wastegate is opening properly, and look for evidence of it hitting the dump pipe. if it is then grind the hole bigger on the dump pipe. Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2491717 Share on other sites More sharing options...
dezz Posted September 13, 2006 Author Share Posted September 13, 2006 Justin told me what you think it is We're gonna be trying some thing tomorrow to check if its hoses etc...bypass the boost controller... if that doesnt fix it, then we'll check out the dump pipe like you've said. Thanks Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2491769 Share on other sites More sharing options...
paulr33 Posted September 13, 2006 Share Posted September 13, 2006 yeah skip the controller completely and it should just run of the actuator if it still spikes to 13 then the actuator is mashed or the rod is mashed or the gate is fouled like mad said Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2492183 Share on other sites More sharing options...
nuffsaid Posted September 13, 2006 Share Posted September 13, 2006 Maybe get a good EBC and that will prevent spiking? Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2492446 Share on other sites More sharing options...
smurf80 Posted September 14, 2006 Share Posted September 14, 2006 Maybe get a good EBC and that will prevent spiking? Yeah but the actuator shouldnt be spiking like that if everything is working properly. I get in there and check everything out first By the way I hear this problem only happens in 40th Aniversary model R33 I think you should swap with me. Just jokes mate im jealous! Cheers Chris Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2494411 Share on other sites More sharing options...
dezz Posted September 14, 2006 Author Share Posted September 14, 2006 lol i was actually saying to my mate yesterday...they must've played around with the 98 model R33's to make them more interesting/challenging Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2494503 Share on other sites More sharing options...
West Posted September 16, 2006 Share Posted September 16, 2006 Boost spike? To 13psi? Psss, more powah. I ran 14 constantly on my old 33gtst for three years . Dont be a tight ass, get a EBC Micheal man . Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2501499 Share on other sites More sharing options...
dezz Posted September 16, 2006 Author Share Posted September 16, 2006 If the controller was the problem, I would...but it doesnt seem to be the case... Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2501505 Share on other sites More sharing options...
TurboX Posted September 18, 2006 Share Posted September 18, 2006 I could tell you the problem, but you might as well buy the latest HPI and learn about it like I did Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2506242 Share on other sites More sharing options...
dezz Posted September 18, 2006 Author Share Posted September 18, 2006 or, you could tell us all... Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2506277 Share on other sites More sharing options...
paulr33 Posted September 18, 2006 Share Posted September 18, 2006 if you didnt have the problem before you fitted the controller then its the way the controller is fitted, or at least logic would say anyway. i cant see it being that actuator at fault, if you remove the controller does the problem go away ? Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2506375 Share on other sites More sharing options...
dezz Posted September 18, 2006 Author Share Posted September 18, 2006 I had the problem before the controller was fitted. Update on this... Justin and I pulled it all off today, took off the controller, and took off the heatshield to check out the dump pipe etc... We basically took it all off, looked at it for a bit, and then put it back on....lol Took it for a test, and it holds 9-10psi all the way (tested to about 6000rpm in 2nd)...so confusing...lol However, the day we fitted it, I could swear it held 9-10 when we first tested it...but a day or 2 later I noticed it spiking...so although it seemed to work today, i'll get excited if its still holding in a day or 2! Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2506409 Share on other sites More sharing options...
siddr20 Posted September 18, 2006 Share Posted September 18, 2006 (edited) I have the same problem i believe its your manual boost controller. Mine use to spike to 1 bar.. Have turned it down a fair bit, and only spikes to .9 bar which is alright. Car can handle it.. Btw there are no hoses going to your stock soleniod?? But now since playing around with the boost, i have to many flat spots in 2nd.. guess i need a tune!!! edit: I got my car dynoed at dyno day, and they said my car was running a little rich.. Which is gd news since mine use to spike a fair bit. But i have just turned my boost down a bit and doesnt spike at all past 1 bar. SO my suggestion is just turn the boost down a little.. Edited September 18, 2006 by siddr20 Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2506427 Share on other sites More sharing options...
dezz Posted September 18, 2006 Author Share Posted September 18, 2006 Stock solenoid has no hoses going to it, but its unplugged anyway...its as good as off the car. I'll update in here after a day or 2, when I can see if it was just a once off thing again, or if its going to last this time.. literally all we did was unplug it, take off the heatshield, look at the turbo/dump area, and i moved the rod that goes to the actuator with my hand....we did absolutely nothing else lol Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2506434 Share on other sites More sharing options...
Munkyb0y Posted September 18, 2006 Share Posted September 18, 2006 (edited) dezz, i suggest checking ur boost in a higher gear, like 3rd, pref 4th if possible. u get a more accurate reading there. but i guess if the spiking was apparent in 2nd before, and it's gone now, u should be ok. so what was the prob anyway? edit: nevermind, it's a mystery, lol. Edited September 18, 2006 by Munkyb0y Link to comment https://www.sau.com.au/forums/topic/134181-r33-boost-spike-at-4500rpm/#findComment-2506441 Share on other sites More sharing options...
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