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4000 lb car, 4speed auto, 4000 stall, 440ci sleeved aluminum block 10:1 comp, tfs 245 heads, custom cam, lsxr 102 intake, NW102. Steet/strip car. Will be running twins with v-band in/out turbine housings. I've been told 6466bb gen2 PTE turbos with thier 1.05ss turbine housings would be a good choice. Just wondering if these sound kinda small with 440ci? Thanks for any help guys!
They would be small on the hot side, but very responsive, that 1.05 v band turbine housing is more equivalent to a t3 based size 2" inlet v band. On autos they will tap out at 1200 or sooner with larger ci engines. I'd probably run a garrett or garrett clone if you wanted better bang for the buck. Something in the G35-G40 range. What are the power goals?
If you want to stick with PTE and want 1000 hp or so just use a gen 1 6266 with the same turbine housing as above. I honestly don't see the bottleneck being the compressor side in your case with 440ci.
In pte you will need 6870 or 7275 to do it easier. I’m not sure where they came up with 6466 in the small v band that would have been so far off on your setup. For a cheaper option I’d use a pulsar g42 7375 or the VS racing equivalent.
Biggest problem is I already have the pipework setup for the "t3" size turbine housing. So I think as far as turbine housing I'm kinda stuck with that. I know there are bigger a/r's now then there used to be as in the 1.05 stainless. I think I'm just stuck with that and the biggest wheel I can get it in.
going back to aluminum block. Also replacing k member and suspension on all 4 corners. Trying to lighten car up a bit. So since I'm building new engine went with more cubes. T3 exhaust housing to small, I found out I can just change flange on up-pipe and go with t4 v-band housing. More then likely going twin 6870 pte gen2 turbos.
How did you guys get to 440 cubes, what's the bore and stroke? I'd have to check my buddy but his 408 + twins just made 950rwhp on E85 not maxed out and very mild cam.
03-04-2023, 02:45 PM
Turbo sizing recommendations? 
