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Bealljk, so are you saying i should get a bigger AR so i don't run ouy of steam up top?
Yea - we use .65 to .70 on our rear mount kits using OEM block ... they hit 14psi pretty good but if you are going to replace this turbo than I'd get into the mid to high .7 possibly low .8.
What power goals are you after?
I would base your revision based on what data is provided by the manufacturer.
Nice, I saw the “sold” update. Now I get to see the kit continue here.
Yea, I wish he would of shipped it. That 12 hour drive SUCKED!!! I need to find a way to fix the broken intercooler mounts other than that looks to be a good kit.
Originally Posted by bealljk
Yea - we use .65 to .70 on our rear mount kits using OEM block ... they hit 14psi pretty good but if you are going to replace this turbo than I'd get into the mid to high .7 possibly low .8.
What power goals are you after?
I would base your revision based on what data is provided by the manufacturer.
I'm thinking I would like to vary between 450whp to 600whp. Ill have to get with Sasha and see what he recommends and what he has seen.
What kind of spool time did you see and did the boost fall off up top due to the small A/R?
I believe I had .82 AR. Attached my old dyno sheet I found. 300ft/lb @ 32-3300RPM wasn't too shabby. This was at 9.5 psi. I cant find the other one, but I did have a 12Psi map as well that netted 457. This was great for stock block TBH. Back a decade ago, I was the first to have the BP kit and I believe Jeff ( binder ; old user on here ) got the 2nd kit and he had a built motor. If I remember correctly, the smaller A/R PT Turbo on Jeffs car was starting to bottleneck. I think he switched to a 1.15AR for the hot side which improved top end a lot. He made good power.
I am trying my best to recall here.. it has been over 10 years lol.
I believe I had .82 AR. Attached my old dyno sheet I found. 300ft/lb @ 32-3300RPM wasn't too shabby. This was at 9.5 psi. I cant find the other one, but I did have a 12Psi map as well that netted 457. This was great for stock block TBH. Back a decade ago, I was the first to have the BP kit and I believe Jeff ( binder ; old user on here ) got the 2nd kit and he had a built motor. If I remember correctly, the smaller A/R PT Turbo on Jeffs car was starting to bottleneck. I think he switched to a 1.15AR for the hot side which improved top end a lot. He made good power.
I am trying my best to recall here.. it has been over 10 years lol.
Vas, I called Precision today and talked to them about what I should do. The guy I talked with told me I should run the .68 and install a backpressure sensor to see how big of a back housing I should get if I go that route. They have a .81 and .84 for the T4.
Hoping I'll find some time to finally finish assembling the engine.
Yesterday was a mix of emotions. I spent all day working on the car I was hoping to have the engine assembled in a few hours, but that was an all day adventure.
The start of the day I found a nice chunk of metal in the oil pick up. Spent the better part of an hour inspecting the engine to see where it came from...to no avil.
Went a head a put the engine together. I really wish I would have been proactive of the last few moths and cleaned all the old RTV off. I spend more than half of the day cleaning RTV.
It was going smooth until I went to install the upper oil pan, then bam...found the culprit of the missing metal.
One of the hole where the lower pan bolts into snapped off. So now I'm on the hunt for an upper pan so I can try to finish the engine assembly today.
