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The Terminator
Turbo Cobras
How to pick AR for 1000+ twin turbo 4v?
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<blockquote data-quote="tt335ci03cobra" data-source="post: 15520681" data-attributes="member: 68944"><p>I went with comp turbo ct4 62/65's, .70 a/r, triple ball bearing, divided flange. </p><p></p><p>Even with stage 3 cams and stage 3 ported ford gt/gt500 heads (cavernous, 375cfm@~.500 lift), anywhere above 4000rpm, I get 9-10psi within half a second.</p><p></p><p>I'm making 720whp on 9psi as well. I was going to upload a video of the spool but it keeps saying the source (my camera reel on my iPhone) isn't a safe source.</p><p></p><p>Basically, if I'm above 4K rpms, and floor it, I have 9-10psi in a quarter of a second or less it feels like. </p><p></p><p>I'm running 3.73 rear, manual t56, and hyper aggressive heads and cams for a street car. .70 a/r is perfect for twins on a modular seeing 6750-7500rpm.</p><p></p><p>If you plan to run 6000-7250rpm, maybe a .58-.62 a/r.</p></blockquote><p></p>
[QUOTE="tt335ci03cobra, post: 15520681, member: 68944"] I went with comp turbo ct4 62/65's, .70 a/r, triple ball bearing, divided flange. Even with stage 3 cams and stage 3 ported ford gt/gt500 heads (cavernous, 375cfm@~.500 lift), anywhere above 4000rpm, I get 9-10psi within half a second. I'm making 720whp on 9psi as well. I was going to upload a video of the spool but it keeps saying the source (my camera reel on my iPhone) isn't a safe source. Basically, if I'm above 4K rpms, and floor it, I have 9-10psi in a quarter of a second or less it feels like. I'm running 3.73 rear, manual t56, and hyper aggressive heads and cams for a street car. .70 a/r is perfect for twins on a modular seeing 6750-7500rpm. If you plan to run 6000-7250rpm, maybe a .58-.62 a/r. [/QUOTE]
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How to pick AR for 1000+ twin turbo 4v?
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