She's Alive!!

[ralphsdiorama]

Well guys, I finally got the rb26 running in the s14. It's been a rough road but hearing her finally purr has been well worth it. So far, the car runs very well except for a few problems I was hoping you guys could help me out with. First I'll give you a list of the parts that I have and of course the start up video.

Parts:
R33 RB26DETT
New oem headgasket
arp head studs
Head was hot tanked & decked
New valve guides
tomei pon cams 260/260
hks gt2530 turbos, tomei dump pipes
mckinney fmic
hks ssqv recirculated
isis raidator, 2 12" fans
apexi suction kit

http://www.youtube.com/watch?v=sG3MpV-0mzs

Now for the problems

1) The first problem is the idle. (I didn't get the tach re-calibrated yet but it will be in the next few days) When I start the car up it maintains a steady idle around 1500 rpm (not calibrated) but it will fluctuate by around 300 rpm every once in a while. The biggest issue is when stopping the revs will continue to drop past idle and the car will die. This happens every time I come to a stop. I'm not sure what the issue is but thus far I am guessing it is the idle air control valve. The only problem is that I got the engine from a local guy who had no idle issues before I got it from him.

2) The second problem is that I get no heat in the car. Could this just be a result of not properly bleeding the coolant? What do you guys think could be leading to these issues?

[Carl H]

idle is most likely due to the tps not being set correctly...iirc the r33 ecu still requires the idle switch on the tps to be engaged with the throttle closed.
if it is not closed at idle then you'll typically have a high idle or a hunting idle.

[ralphsdiorama]

Also, the when I build up boost and let off there is a mild whine from the intake side. It almost sounds as if air is exiting through the intakes. At first I thought it was the blow off valve but upon further inspection it is coming from the intakes. Here's a video of the problem. When the revs start to fall you can hear a burst of air and then the idle starts to die. Any idea what this is?

Video: (The camera is located right above the intakes) http://www.youtube.com/watch?v=xeVKBdepQyg
Also, I am running a single recirculated ssqv. I notice many people run 2 Bovs on the rb26. Could this be an issue?

[ralphsdiorama]

reset the tps sensor and now the car stalls quicker when the revs drop. My vacuum is at -5psi, I'm guessing I have a massive vac leak somewhere and its causing the bov not to open long enough. Then maybe the excess air is leaving back out the maf the wrong way hence causing the delayed woosh sound I'm hearing and the stall. Anyone else have any thoughts on this situation?

[Yellow4g63]

reset the tps sensor and now the car stalls quicker when the revs drop. My vacuum is at -5psi, I'm guessing I have a massive vac leak somewhere and its causing the bov not to open long enough. Then maybe the excess air is leaving back out the maf the wrong way hence causing the delayed woosh sound I'm hearing and the stall. Anyone else have any thoughts on this situation?

Whats the voltage range for the RB's? I forget lol. on my other nissan it's .45-.55 range.

[ralphsdiorama]

It's .45-.50 as well. I set it to .47

After doing more research it seems that my case may be air reversion (air going the opposite way thru the mafs). That would explain the sounds in the 2nd video clip. This is probably due to my low vac as I earlier stated but should the vac be so low? I have 260/260 poncams and am 5,000 ft above sea level. If this vac level is normal then I guess my solution would be a second bov. What do you guys think?

[Carl H]

your vacuum should be in the -6.5 to -7psi range with those cams or approx -14in/hg.
did you degree your cams when you installed them?
also check for any and all air leaks, what youre describing sounds like a small air leak

[ralphsdiorama]

I did not degree my cams yet. I know that not degreeing them can cause poor vacuum but would it cause the car to stall the way it does and the air reversion? I'm going to boost leak test the car today. I'll let you guys know if I find any leaks. Also, I know that the car should be around -6.5 to -7 psi but since I am 5,000+ feet above sea level do you think that could be the reason I am seeing -5psi. Thanks Carl for the help so far.

[ralphsdiorama]

Pressure tested it and no leaks. The car when warms now idles at 450-500rpm. I adjusted my tps sensor from .43 to .47 volts. I'm guessing this is why the car now idles lower. As for the air reversion I'm guessing I just need another bov or a better one. When letting off boost the turbos make a bov sound which I am assuming is surge. Hopefully a new bov will alleviate the surge noise and the aversion that may be causing the mafs to kill the idle. Let me know if you guys think of any other solutions. Thanks

[Carl H]

reversion will cause all sorts of weird issues...if you're getting compressor surge then you definately need to look into a new BOV.
You really should be setting the tps via the idle switch and not the actual voltage output...if the idle switch isnt engaged then it will cause all sorts of weird idling issues.

[ralphsdiorama]

Ordered a synapse that I will recirculate. Carl, how do I adjust the idle switch on the tps?

[FinkenS14]

f*** bad a** man, when will you think youll have it up/around driving? I wanna see this thing?

Your reaction was almost exact as mine was when my car first started. Gave my buddy a big high five and ran around the car saying "FUUUUCCCKKKK YES, IT STAAARRRRTTTEEEDDDDDD!!!!"

I need to step up my game and get my 37R on haha

[FinkenS14]

Ordered a synapse that I will recirculate. Carl, how do I adjust the idle switch on the tps?

I know on my RB25, theres a idle air screw on the idle air control valve. I belive you unplug the tps at warm idle, and adjust accordingly to the right RPM, then plug the TPS back in....

[ralphsdiorama]

Haha yea I am always amazed when I get a motor running. I should have this driving around as soon as I fix this idle problem.

[FinkenS14]

Any updates?

[ralphsdiorama]

Waiting on a synapse bov since the ssqv I have now isn't sufficient. I keep getting air reversion and it is causing the car to stall. Hopefully it will be somewhat reliable by the beginning of June when I get the bov installed and other small issues worked out.

[ralphsdiorama]

FInally got ahold of an engine management system and the car will be getting tuned this week! I will update you guys soon.

[meet07]

Im tuned in

[ralphsdiorama]

362.6hp 286.3tq with stock injectors, 10lbs boost, pump gas (91)



Very happy with the numbers so far. Next spring I plan to upgrade the fuel system and then bump the turbos up to 22lbs, but for now I am more than happy.

[LSDrift]

Wowie. Very smooth curve and sweet numbers for 10psi.