Results in! 4.8L w/ Magnum 76 Exhaust Pressure Test
Sep 28, 2012 | 05:29 PM
#21
I was gonna ask the same question.
Edit: i see that's a pic of the crossover tube.
What about just before the T4 flange?
Don't forget, you're also trying to push all that pressure from one side of the engine to the other, then thru just one log.
The old GN's were this way, there is an upgrade for those cars; it allows both sides to transition into a y pipe design, merging just before or at the T4 flange; which helps lower back pressure.
Edit: i see that's a pic of the crossover tube.
What about just before the T4 flange?
Don't forget, you're also trying to push all that pressure from one side of the engine to the other, then thru just one log.
The old GN's were this way, there is an upgrade for those cars; it allows both sides to transition into a y pipe design, merging just before or at the T4 flange; which helps lower back pressure.
right be for it turns up and goes into the back of the log.
Sep 28, 2012 | 05:32 PM
#22
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Yeah test post was just after the wastegate, cross over tube. I figured that was as good as I could do without drilling the manifold. Didn't want to take a risk later down the road the manifold cracks.
I hope the 83/74 bw wheel in the 1.10 can keep it under 2-1. If not ill try the 1.25.
I hope the 83/74 bw wheel in the 1.10 can keep it under 2-1. If not ill try the 1.25.
Sep 28, 2012 | 05:34 PM
#23
A/r is just a ratio, not a size
Both of these are T4 .96 a/r, right is a Masterpower P trim and left is a PT88 . The PT88 exhaust flows WAY more then these Magnums.
Sep 28, 2012 | 05:44 PM
#24
That big Exhaust side is gonna do wonders!! 
I saw HUGE gains when I went from f trim Turbonetics T76 (68mm turbine) to a BW s480/83 turbine T4 1.0 a/r. 12lbs on the street from a roll would spool fast on the Tnetics and hook really well above 30, when only 10 psi on the BW would just flat blow the tires off and no chance of hooking in 2wd! 
I saw HUGE gains when I went from f trim Turbonetics T76 (68mm turbine) to a BW s480/83 turbine T4 1.0 a/r. 12lbs on the street from a roll would spool fast on the Tnetics and hook really well above 30, when only 10 psi on the BW would just flat blow the tires off and no chance of hooking in 2wd!
Sep 28, 2012 | 06:04 PM
#25
That big Exhaust side is gonna do wonders!! I saw HUGE gains when I went from f trim Turbonetics T76 (68mm turbine) to a BW s480/83 turbine T4 1.0 a/r. 12lbs on the street from a roll would spool fast on the Tnetics and hook really well above 30, when only 10 psi on the BW would just flat blow the tires off and no chance of hooking in 2wd!
I saw HUGE gains when I went from f trim Turbonetics T76 (68mm turbine) to a BW s480/83 turbine T4 1.0 a/r. 12lbs on the street from a roll would spool fast on the Tnetics and hook really well above 30, when only 10 psi on the BW would just flat blow the tires off and no chance of hooking in 2wd!
Sep 28, 2012 | 06:07 PM
#26
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Thats what I like to hear Kyle. I'm interested in seeing how the 1.10 I have coming with the light billet wheel up front responds.
Also, got some good news and ok news. Good news is Kyle is on his game and so is Boost Lab, I got shipping tracking numbers from both today. My ok news, work has me leaving next Wednesday till the 15th. So it's going to be a few weeks before install, but I be able afford the electric bill this month so it all works out.
Jake i'm pretty sure mine is 2.5".
Also, got some good news and ok news. Good news is Kyle is on his game and so is Boost Lab, I got shipping tracking numbers from both today. My ok news, work has me leaving next Wednesday till the 15th. So it's going to be a few weeks before install, but I be able afford the electric bill this month so it all works out.
Jake i'm pretty sure mine is 2.5".
Sep 28, 2012 | 07:46 PM
#29
That 88 has proven to be a great turbo. A pretty penny.
Just like the compressor side not all 76's are the same. Nor flow the same.
Good info.
But I bought the turbo with the intention of buying a 5.3 for my swap... Oh well!