Quote:
Originally Posted by Jack P.
I to studied this before going LS regulator, but I'm not done yet. Everything everyone has said is good info. plus I would like to add one thing that may not help but should be done. Cut the PWM wire close to the TB, not real close but then with good connectors or solder, run a larger wire to the pump. I am running a #8 for my 255lph from front to back. Voltage drop can be a real problem in low voltage systems like cars. The Fitech pumps are the only one's I have found that can use the PWM, others can not. There is a lock out in your set up.
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FAST offers a pump that works with PWM. It is expensive, but it also is rated at over 1,000hp on gasoline.
TanksInc makes a note that their 190 and 255lph pumps (Walbro) will NOT work with PWM control - not sure about that Hyperfuel pump.
Links from TanksInc:
About not using those pumps with PWM, 6th "NOTE" down:
http://www.tanksinc.com/index.cfm/pa...prod/prd84.htm
When used with FITech: http://www.tanksinc.com/pdf/SettingF...Tech_-_Web.pdf
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'73 T/A (sold). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 317rwhp/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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