Rb25de (supercharged) Project

[r33_racer]

Justin, yeh I think they probably are meant to go into the cabin. However I wouldnt have any room to mount them all inside without it looking silly or taking up a fair chunk of room. So left it out in the engine bay. Hopefully they wont get too wet there as they are not exactly water tight lol.

Didnt work Justin.

Edited July 16, 2010 by r33_racer

[TiTAN]

interesting catch can design, is there any internal baffles?

[Mister25t]

By the way, did you end up setting up the electric power steering pump?

Searched the thread and couldn't see anything on it.

[XRATED]

Justin, yeh I think they probably are meant to go into the cabin. However I wouldnt have any room to mount them all inside without it looking silly or taking up a fair chunk of room. So left it out in the engine bay. Hopefully they wont get too wet there as they are not exactly water tight lol.

Didnt work Justin.

I'm planning to run mine into the glove box or up behind the dash.. Apparently they are fairly sensitive to water and rough conditions... If you do go Vipec, they are compatable and plug right up. Do your thermocouples penitrate into the gas flow or just in the bung welded on the outside or each runner? I keep getting different advice-

PM again.

[bigmikespec]

Pretty sure they penetrate gas flow.

I think I speak for everyone when I say we want to see (and hear) a video of this thing idling/whistling away!

[r33_racer]

Ok. Busy day yesterday finishing it all off. Took it for a drive and it ran like shit, as expected. Some further playing in the datalogit with the injector settings smoothed that out. Still doesnt like coming onto boost so early. My guess the fuel map isnt too good for the 0.5-0.8bar of boost it makes as soon as you stomp the gas. The overboost valve is working, hence the low boost.

Ok the catch can does have some baffling inside of it. But it appears to breathing fine. Guess ill find out on the dyno when it counts.

The electric power steering pump isnt setup yet. Its last on the list of things to do. I Will mount it and hook it up once everything else is sorted and working fine.

Interesting you say that justin, cause a few times ive seen mine read some funny temps, maybe engine noise/vibration is causing this... But the actual sensor ends of mine protrude into the runners, so they have gas flow running past them. Well I may have to re run them back into the cab somewhere if it keeps up. Goddamit!

Ok so the good news is there is a video I did yesterday afternoon. It just shows it running. Its not that good and it has me coughing and speaking in it a few times. My apologies.

http://www.youtube.com/watch?v=eHCbYgR3mBg

[r33_racer]

ok so i just dropped the belt and took it for a drive and it was fine in na form. so it seems its just the tune thats making it hesitate when it tries to boost. i was worried it was a mechanical issue with the setup.

[TiTAN]

just the tune left and you can enjoy all the work thats been put into it

[r33_racer]

oh yeh! looking forward to that bit. hopefully it all goes well.

[r33_racer]

So there was a blow out from the discharge port. The aviation goop I used (loctite 3J) wasnt strong enough to keep the two faces sealed even though they are machined. Dont know what RA it would have been. But I know I had to re-mill the face of the outlet pipe flange after welding as it bowed a little. I would have thought with the 3J it would have been good enough, guess not. I refitted both the outlet pipe and bypass valve and regooped them up with some threebond. Hasnt fully cured yet, but did a quick 6500rpm stab and it made 1 bar of boost and it seems to be holding perfectly. No signs of leakage from around the flange face.

Now the overboost valve was fully open and screaming when I did that and it still managed to push 1 bar of boost upto the plenum. Starting to think it might not be big enough. But hopefully once its tuned it would be needed to control boost. It also is stupidly loud when its venting. Other issue is when you let the throttle off sharply, the pressurised air goes out the bypass valve and I think goes out the intake and through the afm...bringing back the unstable idle issue for a second as the revs stabilise. I may need to fit a BOV.... I was hoping to avoid having one. Another thing Ill have to see if necessary after dyno tuning.

[Rowdy]

hah ha that does sound scary!

[r33_racer]

Yeh it does. Its just not expected when you are used to turbo spool/whine. It is just crazy loud in person.

[zebra]

Good to see its going well

Whats it like at 1bar?

[r33_racer]

lol the 1 bar was free revs. Not driving. It runs like shit as soon as it tried to boost whilst driving.

Tomorrow afternoon at 2pm I gotta head over to Mercury and get it tuned!

[zebra]

1 bar in neutral! I <3 positive displacment superchargers!!!

[Mister25t]

Man that thing is wicked! 1 BAR free revving, haha must be hitting load points its never even been close to before.

It'll be interesting to see what its like after the tune

Got to get me one of those twin screws.

[Simonster]

Massive work Michael- hats off mate. Look forward to seeing it in person when she's allowed out

[r33_racer]

Cheers Simon! Im sure you will see it. It will have to be one of those days when there arent any cops to be seen for miles!

Yeh the 1 bar is pretty crazy. Im not sure what boost its even going to make when its fully on song with the overboost valve locked up. Hopefully nothing too stupid like 30+psi. Well tonight we re did the egt modules and put them inside the car, in the glove box to be specific. It was a shit load of mucking around to get them in there, but its done and working. Which im happy with, though I must admit, sparkies must be just brimming with patience, because it took forever and it was a carnt! I cannot stand wiring. Anyway, its all done now, just needs to be tidied up after the ecu goes back in behind the kick panel.

So hopefully tomorrow nothing goes wrong and it all just does what its supposed to do

[SLY-25T]

tuning update????!?! lol.

[ezy_09s]

I just read through all 11 pages of this build r33 racer...fantastic to say the least.

Good to see someone tackling something different & should yield some very good results once tuned !...post tune results asap.