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Old 05-28-2023, 09:46 AM
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Lee Lee is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Crosby, TX (East of Houston)/Texas/USA
Posts: 2,059
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Quote:
Originally Posted by AG View Post
Is there any downside to using a dual plane with the MSD FI?

My motor is pretty mild, But I tested 5 intakes on a chassis dyno - 2 dual planes and 3 single planes. Overall average power, the dual planes were best.

I'm running the FAST XFI Sportsman, which uses the throttle body from an EZ 2.0 system. FYI, at around 315rwhp, that system was around 46% duty cycle on the injectors.

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'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'.

'67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust

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