Tunerstudio has not been reading the wideband. We're investigating wiring today and suspect a ground.

However- the base tune works better than you probably imagine. Although Tunerstudio doesn't read AFR, the gauge seems to be working just fine.

I've gotten around 5-6 psi on partial throttle in midrange RPM. AFR is 11-12 under those conditions. I'll obviously tune for boost once we get tunerstudio worked out, but I'm very happy with the starting maps so far.

The only issue is too rich at idle (11.5-12... it also smells quite a bit lol) but when cruising around off boost it's 13.5-14.5 and under boost it drops to high 11s.

FYI, that's not a good thing.

Did you calibrate your ECU for your wideband? Tools> calibrate

Yeah I know that. BUT my other Holset has been fluttering for 2 years and still has no shaft play or blow by.


-- Fixed the wideband. Wrong color wire issue. Easy fix, now idling at 14 AFR.

Nice! Man, you get all the breaks. I'd have torn the car apart before I found it.

Anyways, try 13.0-13.5 AFR's. Being batch, it makes the engine run smoother, cooler, and makes lean tip-in easier to dial in.

Being it is idle, you won't use hardly any additional gas.

Yeah, going to do 13. It surges at 14. Ran smoother -- but just a little smelly -- at 12.

Why didn't y'all re-clock the turbo so the compressor outlet was facing up?

The compressor housing is too big to face in that direction. It hits the mounting bar for the engine.

- We didn't get away problem free after all lol. Drove another 50-60 miles today, never really stopped smelling oil. I pulled the intercooler tubing apart and found a few cups in there. :rolleyes:

The turbo has very little shaft play, I think the intake seal might just be worn out. I'm going to try my luck with a rebuild kit for holsets. If it works, great, if not... I'm only out 50 bucks and I can play around with other turbo options.

I have a great gt30r that fits your headers. Ready to go.

Pm sent.

Shaft play is a misnomer. All journal bearing turbos have shaft play if the bearings are appropriately sized.

They are friction bearings that require a gap for oil.

Unless the wheel is touching the housing, it's fine.

You’re going to freak out at how small the gt30r is and light!

Car sounds awesome. You guys look like you are enjoying the hell out of it. Watch out for the slippery slope of paint and body. :-D Kinda got a porschepunx vibe going on with that red fender. :-D

The new turbo will be a massive improvement all around, you can clock it properly and you will only have one low hanging pipe left to deal with. Can you zip tie that other one up a hair or what?

Hey guys! The first drive video is done.

- If your not interested in the vlog portion and just want to see and hear this build, skip to 10:45! Thanks for all the help guys!

https://www.youtube.com/watch?v=EKDo94ogpAM&lc=UgypHehEjAtxf5iJiXh4AaABAg

Just to be clear, you're not gravity draining, you're pushing the oil into the sump.

The oil drip tank is doing nothing in that configuration. It was designed to provide head pressure to a scavenge pump. In your config., you are pushing the oil through it and back into the sump.

I have mine drain into the oil drain plug. Drilled a hoke through the plug and welded a hydraulic fitting on. The turbo is slightly higher than the drain plug, allowing it to flow back.

I still don't understand why you couldn't fit the volute up instead of down? My HX40 is bigger and cleared just fine.

Later, I installed a Borg S366, which took a little notch into the engine crossbar to fit. I assure that 2 HX35's would fit inside the S366 (exaggerating of course).

Pount is, it should clear.

BTW, yes, it sounds like it runs like a champ!

Congrats on the build!

Hey guys, dyno is probably next week. What is a safe healthy power level that won't shred my 915 transmissions?

Would 350 wheel be okay as long as I roll into the power when driving?

I believe 350 to be too much if boost comes on quickly. If you can modulate boost and keep it manageable4-5psi under 4500rpm then youre safe in 1st and second and then more boost in the last 3 gears. What clutch do you have? That could likely be toast with that power level. A Sachs sport clutch would be good for 350-385lbft.. I ended up with a cenderforce clutch I believe.
If you're diligent and do "roll into it" everytime you'd be fine with 350lbft. Problem is when you know you can smoke that honda next to you the boost addiction takes over and the throttle gets pushed down harder and poof......second gear breaks.

Agree here. The huge torque ramp under boost will kill a 915.

Funny that a different cam with more rpm capability (like 964) will delay boost onset and soften the torque ramp. Combined with a larger turbo (slower spool) full boost will be 3800. This will be fine for a 915.

Built an 84 Carrera with 3.3 using this config. Running about 1 bar boost, somewhere around 420 to the wheels and running a 915. The car is deceptively fast since it does not have the huge boost hit in mid-range yet just keeps building to redline.

I put a bunch through the 915 and stock tired old clutch in my SC conversion(.9 Bar Dyno Sheet). It held up on dyno and I drove it all summer. No dumping clutch or really pushing it while driving. Would get greedy from time to time and rolled on it a few times. Lit the 285 30 18 Pirelli’s up. Short bell 930 transaxle going in this summer. Then its going to be time to let her eat!

http://forums.pelicanparts.com/uploa...1517948525.jpg

http://forums.pelicanparts.com/uploa...1517948555.jpg