Results of GTX rebuild by Nils

[Red Devil]

Since I am still breaking it in, the WOT's were limited but here are the results:


Full tank of gas
Air/Water 80
1st run 73.8 @ 8450/8500
2nd run 74.8 @ 8450/8500
3rd run 75.4 @ 8500 (5 bars of fuel)
4th run 75.2 @ 8500 (5 bars of fuel)

So, for now, looks like a rock solid 75 +++ with a lot of gas....

I might have a boost gauge problem though because I am still pegged at 11 pounds, the exact same before the rebuild. This is not an indication of a leak problem....

[RustySeaRustyDoo]

So...What were you running before the rebuild?

[Red Devil]

So...What were you running before the rebuild?

low 73's, but with cast pistons and stock valves

[Water4fire]

Dam that is awesome. I am glad to see it comming around. You have put some time in her. I would just wet my paints if you came flying by me on that thing... You are gonna superise a lot of people.

.

[CRS]

Jay,
those are promising results but whats up with your boost? Nils didn`t forget to fit your overdrive gears did he . Did you remove your flame arrester in the end? Wondering if you might have a leak there.With those revs you should have 13lbs easy unless Nils has done the best ever valve and port job.Oh yeah,the sweepstakes not won till your all run in and have found that boost

[Rendog]

Very nice man!

[rxpblast]

very nice numbers!

[Red Devil]

[quote=CRS]Jay,
those are promising results but whats up with your boost? Nils didn`t forget to fit your overdrive gears did he .

I wish I knew and have no idea unless the gauge is defective

Did you remove your flame arrester in the end?

Yep, I removed that while waiting for the motor

Wondering if you might have a leak there.With those revs you should have 13lbs easy unless Nils has done the best ever valve and port job.

I've checked for leaks but a leak happening at the 11 mark would seem a little odd..

Oh yeah,the sweepstakes not won till your all run in and have found that boost

[BDNJ]

Jay - 4" intake all the way to the mouth of the s/c? BTW - I have never seen 13 lbs. 12.5 consistent @ 8500-8550.

Brendan

[Red Devil]

Jay - 4" intake all the way to the mouth of the s/c? BTW - I have never seen 13 lbs. 12.5 consistent @ 8500-8550.

Brendan

Brendan,

I am running a modified rear intake set up. Basically, I am only running about 24" of 4" hose from the supercharger to the air intake. About the only way to improve that would be to stick an air filter directly on to the supercharger.... I am starting to wonder if maybe my housing was bored out a little more than others so the tolerance is greater from the impeller to the housing??? I should be seeing a bare minimum of 12 lbs with my current setup...