Turbonetics BB questions

[chopstx667]

So I bought the TNBB off of Garrett720 and got it installed on the same night (Just couldn't wait ). So far I'm liking the performance of it, everything is smoother all across the board and EGTs seemed to have dropped ~100* too. I also floored it in 140 hp smoke and could NOT get above 1200 going about 75-80 mph, which is pretty cool.

I was told to adjust the wastegate 3 turns so I did that before I put it in and am pushing about 28 psi max. I use to make a little over that so do I need to adjust the wastegate some more? Should I be making more boost?

Also I was told it came with a 1.10 housing, I thought they only came with .84 or 1.00 housings? or could you upgrade to a 1.10 like with the 38r? Also does it make any difference in lag, power or EGTs?

Thanks in advance, Leon.

[chopstx667]

bump, anyone?

[moore20017.3]

The bigger the ex housing the slower the spool. This is done to allow more exhaust flow on top. A .84 housing will spool quicker, but is limited on top end how much it can flow on the exhaust side. This is where the backpressure is most commonly overlooked. Small housing=quick spool good low end power, Large housing=laggy spool but better top end performance. .84 on a towing truck or dd bigger on a race or hotter tuned truck.

I don't have any experience with drop in turbos, but with stock injectors I would try not wastegating it at all and see what it does. I would not do this without monitoring the exhaust backpressure though. And this is assuming that you have the 1.1 or larger housing.

[CSIPSD]

I really doubt you have a 1.10 housing, TN never made one, and I have never seen one on any TN turbo.

[Dirk]

Originally Posted by CSIPSD

I really doubt you have a 1.10 housing, TN never made one, and I have never seen one on any TN turbo.

Agreed.

That turbo should be a 1:1 or 1:1.15. And the only 1.15 (turbine) housing I've seen was modded at river city turbo. I've never seen a 1.10 compressor on a TN BB.

[garrett_720]

Im sorry Leroy. I just looked at the box that it came in and it says its a 1.00 housing.

[chopstx667]

Oh ok, my bad guys it's the 1.00 housing. I did a little researching and saw there was no 1.10 so I thought it was special made or something, sorry.

[layson]

tighten that wastegate down some more!!!

[chopstx667]

How many more turns should I turn it? I saw on a couple of websites that it just said 28 psi, so I don't exactly know what it's rated for. Anyone have an idea?

[bigwhite7.3stroker]

I have the TN BB also and have never adjusted the wastegate on it I asked Kevin at Blackwidow when I ordered it and he said it would be fine were it was at and I get 36-38 with Stage II's and the Water and Meth on

Was also told that the TN has a lower drive pressure which means it can move more air with less PSI or Boost pressure which is a good thing