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Post by crouton23t on Feb 1, 2021 12:22:12 GMT -5
So I have a forged bottom end with a stock ranger dual plug head and roller ranger cam. ranger intake. 850cc injectors. Stinger front mount intercooler. Cheap Center mount header. 3 inch down pipe and full exhaust. Running e85. Cheap stock replacement turbo. Wanting to get the most out of current set up.
Torn between borg, Garrett, and precision
Either borg sx-e 252
Or
Garrett 50 trim T3 through boport
Or
Similar Precision turbo (5431 mfs)?
Money not really a deciding factor. But am thinking of boport stage 3 head down the road with gutted and ported intake with better center mount header. Street friendly cam when doing head.
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Post by Stinger on Feb 1, 2021 16:40:09 GMT -5
The 50 trim is sort of the standard "bolt it on and it works well" turbo. Since it uses the same platform as the stock turbo everything just bolts up and works (up to 425hp or so at the wheels). The BW 252 is a little larger and requires more custom "stuff" to connect it to everything else but it's the most modern/efficient of the options above. I'd rank the 5431 3rd of the bunch.
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Post by crouton23t on Feb 2, 2021 10:47:03 GMT -5
Ok I think that info will solve my pick. Another question I have is how do I squeeze the most out of what I have. t3 stage 1 turbo from big r website. Running 20psi and I don’t know the timing off the top of my head. 1ms of spark duration with ls smart coils. I’m looking for your wisdom on what works the best with my set up just so I know I’m optimizing what I have now. I’m assuming dyno tuning would be my best bet but I’m not sure if there’s a place local to me. Would the borg sxe252 be a big upgrade if I don’t change anything else? Also what a/r works best? Thinking 3”v band for outlet. Thanks for the time Shannon!
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Post by Stinger on Feb 2, 2021 14:34:45 GMT -5
More boost is about the only thing you can do with the current setup to get more out of it.
The turbo would be an upgrade, much more so with more head/intake flow and a larger cam (as those mods would certainly max out the current turbo). I believe BW has some turbine sizing tools available for picking the turbine wheel and housing a/r.
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Post by 88turbobird on Feb 5, 2021 8:54:18 GMT -5
I don’t mean to hijack this thread but what rpm would you expect to see full boost with the sxe252? This would go on a stock head with 1.5 boport cam, gutted and ported upper and lower intakes with a ported gnari manifold.
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Post by Stinger on Feb 5, 2021 11:26:37 GMT -5
I probably wouldn't put one on a stock head/small cam combo, at least not for an extended period of time. They are rated for 300-550hp and you're setup would be below that lower limit. Would likely not reach full boost before 4000 rpm because of the lack of airflow (stock head/small cam).
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Post by 88turbobird on Feb 5, 2021 14:47:38 GMT -5
Thank you for reply. I have a single side ball bearing GT35 on the car now. Full boost (21psi) hits around 3800-3900. Compressor is a 70 trim with .63 a/r turbine. I’m thinking of going to a smaller t3/t4 with a 50 trim compressor. Would you recommend staying with the .63 a/r turbine housing for some room to grow down the road? A ported head with larger cam is on the list of planned upgrades.
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Post by Stinger on Feb 5, 2021 16:15:15 GMT -5
Yes, 50 trim with a .63 a/r stage 3 turbine is a great turbine to compressor match.
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