Can anyone point me in the right direction to oil return and feed flanges for my precision turbo? I found these but I don't want to order if it won't fit.
Oil & Water: Turbo Oil Inlet And Drain Flanges

 

I've tried searching for an answer to this question but had no luck.. When do I need to worry about maxing out the MAF (I think I may be close to maxing it)? Also, if I wanted to use an LS1 MAF from my GTO would that work?

 

you will get the MAF is out of range P code and CEL... then you are out of range. LOL I get it all the time so I deleted the notification. Tuned around it and commanded more fuel in PE.

 

Ah ok, do you know if I could use the stock LS1 MAF I pulled off my GTO in the event I want to go bigger? I know I'd need to tune for it. I want to shoot for 420whp on a mustang dyno.

 

There are guys here with a larger map and then you scale it to fit inside the crappy coded lsj ecm (254kPa max table). But its really unnecessary. To each their own, it affords them things they wanted in their tune. I am tuned for map up to 3000 rpm, then it doesnt matter after that. Map just becomes a way to watch the pressures in hpt until 254, then I watch what its doing on my gauges or the dyno. MAF is more important on our cars for turbo purposes.

 

Will this work on my precision turbo?
ZZPerformance - Oil Feed & Return Line Kit for Ecotec #ZZ-OFL-ECT

 

It should work. That's what I used for my s20g. Your turbo isn't water cooled, correct?

 

When are you going to get that 20g up and running? Excited to see what you are going to do with it.


I have a ton of info that i have gathered on the 20g, its become an obsession cause I was trying to find the diamond in the rough. Its old tech and although popular on JDM stuff its still not a very sought after turbo. Get a pencil cause I am about to unload my findings for it.

Well our TD06/TD05 10cm turbo is actually a very well put together setup. Bill Hahn chose this pieced together turbo out of years of racing them on DSM cars and later the Ecotec and SRT4 cars. They never made the power I did because most of his customers were throwing a kit on and calling it good. There may be a few of unheard customers running these things into the PSI I did this past week. But I have been the only one getting back to him regularly with progress on my build.

Our 20g hits its peak efficiency at 25-30 psi depending on the flow of other components so the old saying that 25 is it on the internal waste-gate is garbage. With the Ecotec head ported and a 3" exhaust it flowed well into the 27 psi before loosing efficiency on the ported LSJ Ecotec head. At 28 psi I started see the power decrease and tq increase about 5 ft lbs.

So on E85 we can throw lots of fuel at this turbo that usually would create heat over a given psi depending on the engine it was bolted to and still make power instead of heat.

ITS ALL ABOUT E.

So on our cars it looks like we make 27 psi on E before dropping in power. Also for every 1 psi of boost on the 20g I was seeing 10whp.

Feb 2013 Dyno pulls (bad bearings, 10,000 miles on turbo)
At 15 psi I was at 338
At 20 psi I was at 400
At 22-23 psi I was at 420

June 2013 Dyno pulls (rebuilt turbo by me with Mitsubishi Heavy Industry parts, stock fuel pump on afr numbers)
At 18 psi I was at 388 11 afr
At 27 psi I was at 472 13 afr
At 28 psi I was at 462 (dropped in efficiency) 13 afr
At 24 psi I was at 430-440 (messing with the brfps) 12 afr

Also the numbers could be questioned and I dont blame people being skeptical of the 20g but with e85 you can lean on it more, our heads flow well, and the results are repeatable on a very expensive eddy current braked chassis dyno. There was a corvette running on the dyno the weekend I dyno'd my car, he put down 600whp for comparison on NOS. I feel my numbers are fairly accurate. There were many more runs than just what I have listed above and all of them were within 10whp of the given psi we saw on the dyno. I have graphs for the numbers above but we were running 460's consistently in the 12-13 afr range while messing with my BRFPS. I just ran out of fuel pump.

 

Thanks, it's oil cooled

 

Almost done with my build! /excited. This may be a dumb question, but how did zzp plumb their wastegate vacuum lines, to the Saab intake manifold?

 

hahaha officially have the worst luck with my car lately. Low on power and everything and bought new wheel setup and haven't been back on dyno recently. Need a new left axle and possible transmission now. Car sounds normal until I put it in gear ( any gear) and it gets hard to shift at times and gets a horrible whistle noise or sounds like someone is dragging a tin can across pavement. Going to check transmission fluid here on Friday I hope that is the issue, but the question is where did it go if that's the issue

 

For sale sign lol. Good news is you can get a drivers side axle from the parts store, passenger side you can't, atleast in my experience. Only makes nose when in gear could be your tob too. Does the noise change in neutral when you play with your clutch?

 

Yeah the noise only happens when you push the clutch in and put it into any gear and is stiff and hard to get in and out of gears.

 

Lol they are the same exact axle. completely interchangeable

 

Definitely a clutch/TOB issue, the hard shifting is because you are not fully releasing the clutch when trying to shift. Time to drop the trans!

 

Could be tob

 

I've read this before but GM has different part numbers? And when i had my axles out they were different lengths. Unless I'm just crazy which could be..

 

They say left and right on them from the factory but they can be swapped back and forth, they are the same size.

 

Just dropping this in here. Finally got a video just wondering if I should cut the muffler off and just have it full 3in straight piped. What's yalls thoughts?

 

What kind of specs would be great for a aggressive street cam???

 

zzp stage 2 is as agressive and proven as they come. I just had a set in my garage, I just sold them. My perfect cam is the stock LSJ cams. They have a great powerband and have no need to be upgraded on a street car, even when you start making bigger power. Love my stock cams.

 

Well then I might just go with a fully ported n polished head, diamonds, n sleeves from mrb for my engine build

 

saying maf is more important for turbo purposes is an incorrect statement


if you are maxing out the maf then you need to rescale if you still run out of maf then you can add a bigger maf tube or you can add a maf t to the system


lsjion dose good port work

 

Right. There are several ways to approach the MAF issues.

3.5 inch MAF tube section
ZZP MAF Mini AFC Air Fuel Controller
If you hit the end of MAF you can tune around it on a dyno. This could be more difficult on a remote tune.