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I need to get some back pressure data. But going from 24psi to 26psi only made the IAT change about 5-10* but it only picked up about 2mph. IAT's were around 180* F at the stripe.
The Wallace calculator says that is about a 35hp difference from those 2psi. Extra temp gain doesn't sound horrible, right? Maybe they're not quite done..
Do you think you might get some back pressure data gathering before Milan closes?
Not sure what I am going to do with the motor/turbos for next year. I may just get some weight out of the car and see what more it'll do.
Those would seem to have a higher ceiling than the 6765 would just take more time to spool but seems maybe they'd make more steam up top than my turbo choice
Those would seem to have a higher ceiling than the 6765 would just take more time to spool but seems maybe they'd make more steam up top than my turbo choice
This guy made some steam with the 67/65's on a 6.0L. The made pretty good power NA though.
Congrats! What changes were made to get it spooling so much better? Didn't you say the 72's were burning oil a bit now as well?
The Gt35 billet 64mm arrived... kinda. Received both exh. housings and one turbo. Still waiting on one. They look "good" but who knows. I did notice the surge ports don't go all the way through... Not sure if that's normal for this design or not. Exh. housings are tiny!
I'm gonna be testing the 6765s from VS here soon at the prices of these turbos seems like it's worth taking the shot I see a lot more happy people with these like turbos than unhappy
Those turbos do look pretty good! My 72s have had leaky compressors for a long time, and the smoke a ton on hot starts.
The biggest difference in the spool at the track was just being able to hook. Since I was able to leave around 4100rpm and 8.5psi they lit off fairly quick. It allowed the converter to flash over 5000 instantly and they spooled up much better.
This RPM and Boost over the run. You can see how soft that 1-2 shift was, and I went into 3rd pretty early because I couldn't tell if the trans actually grabbed 2nd or not.
How are your drains setup again? I went with ¾” corrugated gas line. But the ID is only about ½”. I was wondering if the smoking issues could be drain related? I’ve always used ¾ ID on my recent turbo projects. I’m only swapping due to the oil leakage/smoke issues. Wondering if it’s causing issues with the WB02 readings/life as well.
Quick update on the 72/68’s I pulled. They are bone dry on the intake and exhaust sides. Makes me think the turbos weren’t leaking at all. Down pipes are clean, and charge pipes are clean. Making me wonder where the white smoke puffing out the pass side down pipe was coming from. Compression test is good. Waiting on a borescope to peek at the pistons.
On a side note, the new GT35 series turbos are so small I have to redo the drains and exhaust to make them fit.
10-23-2017, 06:47 AM
