bhaas

I got my gauges installed and I wanted to see the EGT and A/F gauge in action so I started it up. Had a radiator nightmare but I fixed that. But the drivers side turbo blows a lot more than the pass. side does. Are they suppose to do that? Does the drivers side normaly blow more? WTF? I also installed the O2 sensor in the down pipe right after the turbo on the drivers side. Hope that was the best place for it. It sure bounces around a lot but the EGT gauge is cool. Both sides were the same temp, about 700. I also got a little downpipe rubbage I'm gonna have to look into. Hopefully I can fix that with a torch cause I really don't want to have to take it off. I want to drive it. My bonnet should be here tomorrow or Monday and I have to make some hose fittings for the fronts of the turbos (that really sucks) I figure I'll make 2" hose fittings for those going into a "T" or "Y" pipe then 3 1/2 to the bonnet and I'll be driving it. Damn this is a lot of work.

Brad...

Crazy2.8V6Man

Sounds like you have a nice setup can u tell me what all you have done and what numbers u think youll be pushing.

Guido

That is odd Brad. Maybe there is some inefficiency from one manifold to the other. :shrug:

Are you POSITIVE both turbos are exactly the same??

bhaas

Yup. They're both the same. 63X60 and both look to have new compressor wheels to. One spins just a bit easier than the other. I haven't really revved it up a lot. I should be driving it soon. Just waiting on my bonnet then I'll know if I have to make new headers or not.

Brad...

BOTLFED

Wow, that's kinda strange isn't it... Hope it works out..

A little off topic, but, how does one know if both turbos are adjusted to output the same psi? Say if you were to make adjustable wastegate actuators, how would you set them the same?

Probably should be a new topic, but I'll see if I get any attention in here =)

Cheers!

askulte

Freewheeling at idle isn't really an accurate way of measuring the output of a turbo. The only difference there will be from having the wastegates slightly off between the two turbos is that one bank will have a little bit more backpressure from the turbo that's working harder. The intake pressure ends up the same, since they both feed the same throttlebody and plenum. If you want to get scientific, you could borrow a non-contact tachometer. It works with a laser beam (or maybe strobe or LED). You could pull off the inlet to the turbos, and during a dyno run, measure both sides (aim it at the impeller) and see how close the rpms are.

I wouldn't worry about it too much.

bhaas

That's what I wanted to hear. Right on. When I first start it up neither one blows hardly anything till it starts getting warm. Imagine my dissapointment the first time I started it up. As the motor got warm they started blowing a lot more. Thanks.

Brad...

B4Ctom1

if you are checking it without a load you may not see tuely that one is blowing harder than the other. like if you are snapping the throttle or just holding the throttle RPM up some under the hood.

TonyC

iTrader: (1)

Remember that the majority of the turbocharged engine's power is generated from heat. If a few cylinders are running hotter (lean, retarded, whatever) the turbo will probably spin a little bit faster on that side, but when you consider that difference at redline, it will probably be insignificant (note the probably, I'm not an expert by any standards). Awesome job on the projoct, it's really inspired me to try one for myself (when the time and money permits it, I'm in college ).

Good Luck

TonyC

iTrader: (1)

Wait, nevermind, I see now that the sides are running at the same temps, ok I'm out of ideas, maybe you should just get new muffler bearings.

CamaroFreak87

got a question about your gauge placement...why didn't you put your new tach in the place where the original tach was? That's how I have mine.