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Anyone running twin precision 6466
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<blockquote data-quote="tt335ci03cobra" data-source="post: 16369751" data-attributes="member: 68944"><p>Not running 6466’s, just 62/65’s here.</p><p></p><p>T56 with an fr500c cammer intake it made 1208whp on 30psi with stock ecu and 96% fuel trim meaning undrivable dyno tune. I need a stand alone.</p><p></p><p>More tellingly, on 10.78psi and pump gas it makes 813whp and on 20psi and 110 octane it makes 1070whp very safely- again I need a stand alone.</p><p></p><p>I’m going to step down to 60/62’s when I go stand alone. </p><p></p><p>Considering 800whp in the right combo can run 8’s at 150+, I just don’t give a shit about whether my combo can make 1208whp at 30psi or 1162whp or 1177 or whatever the ****.</p><p></p><p>Personally, I want to make the most usable power as soon and long as possible. </p><p></p><p>I’d like to see 10psi by 3000rpm without break boosting or loading it up. I currently see it by 3500-4000rpm just rolling wot at 2500rpm. </p><p></p><p>My power currently looks like this on pump gas and race gas.</p><p></p><p></p><p>[ATTACH=full]1624573[/ATTACH] </p><p>813whp 91 oct gas. Decent spool, great power spread in my opinion from 4500-7500rpm imo.</p><p></p><p></p><p>[ATTACH=full]1624572[/ATTACH] </p><p>1208whp racegas with obvious need for a stand-alone vs stock+sct. Too laggy/peaky imo. Honestly good flat power from 6000-7250 though. Like 1200whp for about 1250rpm but it just looks and feels laggy on higher and higher boost.</p><p></p><p></p><p></p><p>Anyways my point is drivability for a street car, and manual, I’m going down to 60/62’s and a stand-alone with a few more tricks to help spool and power production. My numbers in those graphs are with </p><p></p><p>• t56 McLeod street twin</p><p>•62/65 comp triplex oil/water turbos (triple ball bearing baby t4 snails)</p><p>•mmr stage 3 custom turbo cams</p><p>•stage 3 ported 5.4L Ford gt/gt500 heads</p><p>•5.3 big bore stroker 9.3/1 compression. Yes it’s that tame.</p><p>•fr500c cammer intake manifold</p><p>•stock computer with sct x4/dyno tuning</p><p>•id1000’s, custom fuel, return twin 405’s</p><p>•custom hot side with CG fab forward headers</p><p>•custom cold side with an inefficient but cool looking dual inlet and dual in/out huge intercooler.</p><p></p><p>I’m stepping down to 60/62’s for the slightly better spool, and I figure standalone, wide bands, etc will allow us to do much more to basically make the same peak numbers without the safety concerns and with additional fail safes like knock, retard, etc calibrations. Leaning towards a holly efi setup with digital dash.</p><p></p><p>Op’s being 4.6, I couldn’t imagine what 64/66’s would feel like especially with a stick but it would not be very streetable, even with a proper turbo cam imo. </p><p></p><p>I rev to 7500rpm, sometimes 8, and I think you’d need all of and then some of 8-9k rpm to find usability with that size pair on a manual 4.6l or have very long gears. I run a 3.73 rear and 26.5” rear tire.</p></blockquote><p></p>
[QUOTE="tt335ci03cobra, post: 16369751, member: 68944"] Not running 6466’s, just 62/65’s here. T56 with an fr500c cammer intake it made 1208whp on 30psi with stock ecu and 96% fuel trim meaning undrivable dyno tune. I need a stand alone. More tellingly, on 10.78psi and pump gas it makes 813whp and on 20psi and 110 octane it makes 1070whp very safely- again I need a stand alone. I’m going to step down to 60/62’s when I go stand alone. Considering 800whp in the right combo can run 8’s at 150+, I just don’t give a shit about whether my combo can make 1208whp at 30psi or 1162whp or 1177 or whatever the ****. Personally, I want to make the most usable power as soon and long as possible. I’d like to see 10psi by 3000rpm without break boosting or loading it up. I currently see it by 3500-4000rpm just rolling wot at 2500rpm. My power currently looks like this on pump gas and race gas. [ATTACH=full]1624573[/ATTACH] 813whp 91 oct gas. Decent spool, great power spread in my opinion from 4500-7500rpm imo. [ATTACH=full]1624572[/ATTACH] 1208whp racegas with obvious need for a stand-alone vs stock+sct. Too laggy/peaky imo. Honestly good flat power from 6000-7250 though. Like 1200whp for about 1250rpm but it just looks and feels laggy on higher and higher boost. Anyways my point is drivability for a street car, and manual, I’m going down to 60/62’s and a stand-alone with a few more tricks to help spool and power production. My numbers in those graphs are with • t56 McLeod street twin •62/65 comp triplex oil/water turbos (triple ball bearing baby t4 snails) •mmr stage 3 custom turbo cams •stage 3 ported 5.4L Ford gt/gt500 heads •5.3 big bore stroker 9.3/1 compression. Yes it’s that tame. •fr500c cammer intake manifold •stock computer with sct x4/dyno tuning •id1000’s, custom fuel, return twin 405’s •custom hot side with CG fab forward headers •custom cold side with an inefficient but cool looking dual inlet and dual in/out huge intercooler. I’m stepping down to 60/62’s for the slightly better spool, and I figure standalone, wide bands, etc will allow us to do much more to basically make the same peak numbers without the safety concerns and with additional fail safes like knock, retard, etc calibrations. Leaning towards a holly efi setup with digital dash. Op’s being 4.6, I couldn’t imagine what 64/66’s would feel like especially with a stick but it would not be very streetable, even with a proper turbo cam imo. I rev to 7500rpm, sometimes 8, and I think you’d need all of and then some of 8-9k rpm to find usability with that size pair on a manual 4.6l or have very long gears. I run a 3.73 rear and 26.5” rear tire. [/QUOTE]
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