Thread: Think I went with too big of a turbo...

yea I feel u......I'm ganna see how things go with the log and go from there.

Best thing to do, we all know that a tubular is a much better option than a log, on every engine.... The log can work on a ve but it gets to a point where it does become a restriction.
Drew

i wonder how a gt2871r with a gtir mani would do?

That is a great setup for a ve, just get the larger of the 2871r's... Personally I would run an external gate but you don't need it. If you could get a hold of of a divorced wastegate downpipe setup for the internal gate it would be a nice addition also. You will have no issues with a 2871r on a gti-r manifold, even if it is a basic setup. I suggested Vadim go with just a simple gti-r t28 setup as it can make over 300whp, flows well and has been proven to work well and last. Plus you can still make quick boost but I guess he had issues fitting it with his P11 and that is why he went the way he went. He will get his setup sorted out, Jamie is pointing him in the right direction and once he hits a dyno, it should be fully sorted. Now we all know it won't make as much hp as a tubular manifold but it will work when all the bugs are sorted out. I have a feeling that Vadim is having issues with something in his setup combined with the tune. Not sure what it is since it is hard to troubleshoot a car without being there to test things and feel how it runs yourself.

Indeed

I think it may be the design of this particular log. V and myself have the same issue with that log manifold. Maybe you guys can make the power you want, but it isn't with the log we have used.

Can you make 300whp? Sure. 450whp? Yup. The overlap still seems to be the largest issue though. You can't tune that out. I tried dialing out overlap by retarding exhaust and advancing intake... just for kicks. It made the bottom end power terrible.

I wait eagerly to see Vadim's results from the tubular swap. It will make more power, obviously. But more importantly, the cams will be able to scavenge better and reversion will be reduced tremendously. Reversion is killing the power, not the log. The log is just the instigator.

I am almost positive that Nate's NX was on a protech log, there weren't that many choices at that time. It was in 2003 so I can't remember for sure, I will try and track him down. I think that if a t25 can make good power on a stock ve, a log with the size turbo that V has should also. I just hope he gets it figured out, I think that he has another besides tuning and running a protech log personally... Not sure if they have had different designs throughout the years or not. I can tell that it is definitely not the best design, even as logs go. Did you clean up the inside of your log and make sure all the ports lined up properly since it wasn't made for a ve?
Drew

Mine was made specifically for VE, but I had the same issues that V has. It was the protech "redesigned" manifold. It was a very nice piece. But feeling the engine bog when the VVL hit really sucked.

I highly stress this, otherwise you will be replacing your pistons/motor in no time.



That's what I said/thought and look at where I am. If you can't go straight to tubular definitely try it. I would like to see if you will be another victim of the log or if your turbo will actually make it out.



I've been getting a lot of help form another forum member with the tune too. Lets just say his tune made 10 more whp then any other tune that I've tried. I wont mention who it is unless they are fine with it .

Another thing is, I'm running my turbo is outside of it's good powerband range. It's just starting to get fun and I kick the wastegate on. Once I go tubular I will up the boost to 15 psi.



THIS. If VVL kicking in made the car feel better, I would say it's something else then the log. I tried VVL at 4800 and my nice feeling torque would go away around there. Moved it 5500 now it's better. I think it's time to move it to 6k again.

This kind of log will work a lot better. The pulses are separated moreso than in the protech design.
PFabrications - PFAB S2000 Log manifold