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April 27th, 2008, 11:13 AM
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fast and gen 7
im thinking of changing to a aftermarket ecm.i know a buddy of mine has a turbo demon 10.5 car with gen7 and he uses the negative fueling on the gen7 does fast xfi have this feature also? its purpose is with 1 set of electronic injectors and one set of mechanical it lets the car start and run on the ecm contolled injectors and at a certain boost the mechanical system comes on and the negative fueling feature pulls the fuel out of the electronic injectors to correct the a/f ratio
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87 buick,cpt66,,devils own alky injection,60#motrons,gen 2 with extender chip ,walbro pump and voltage booster,9.5" 3400 redneck racing converter,comp 212 roller cam,gn1 non ported aluminum heads,rcj powerplate percision upper plenum 70 mm throttle body combo from rjc,mt drag radials,umi bars,big cottons front mount,and a bov 
    
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April 27th, 2008, 02:39 PM
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Why wouldn't you just size the EFI system appropriately and not use mechanical injection?
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84 T-Type, TSO car Powered by DLS Engine Development 219-956-3653 Big Stuff 3
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April 27th, 2008, 10:17 PM
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im just throwin ideas out but you could use a very big turbo with a small shot of spray for spooling and use mechanical 160 pound flow rate type mechanical injectors plus say 60lb electronic and keep it totally street friendly and be say an 8 sec motor
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87 buick,cpt66,,devils own alky injection,60#motrons,gen 2 with extender chip ,walbro pump and voltage booster,9.5" 3400 redneck racing converter,comp 212 roller cam,gn1 non ported aluminum heads,rcj powerplate percision upper plenum 70 mm throttle body combo from rjc,mt drag radials,umi bars,big cottons front mount,and a bov
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April 28th, 2008, 04:17 PM
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Both gen7 and fast can do what you want. 120lb injectors work fine on the street with some tuning. I think you can run 8s on that amount of injector. They are good for about 1000 rwhp.+
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OLD fast efi help still located at http: me //www3.sympatico.ca/norbz/felpro.html or email norbz@sympatico.ca  Home of the 218hp stage 1 3.8
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April 28th, 2008, 04:29 PM
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I'd get the system that people around you know how to use. If your buddy knows the Gen7 good, then get that.
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Kevin Bolger  '87 Turbo T 9.83 @ 138.56 11/3/07 Engine, V1 intercooler and transmission by Extreme Automatics http://extremeautomatics.com/ #4 in TSM points series for 2007
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April 28th, 2008, 10:48 PM
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they use the gen7 the way i was saying but its because they run alky and he wasnt sure the fast had the fueling option.do they have a harness out for the buick and gen7
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87 buick,cpt66,,devils own alky injection,60#motrons,gen 2 with extender chip ,walbro pump and voltage booster,9.5" 3400 redneck racing converter,comp 212 roller cam,gn1 non ported aluminum heads,rcj powerplate percision upper plenum 70 mm throttle body combo from rjc,mt drag radials,umi bars,big cottons front mount,and a bov
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April 28th, 2008, 11:13 PM
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Quote:
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Kevin Bolger '87 Turbo T 9.83 @ 138.56 11/3/07 Engine, V1 intercooler and transmission by Extreme Automatics http://extremeautomatics.com/ #4 in TSM points series for 2007
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May 14th, 2008, 09:48 AM
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Quote:
After mine he has done 7 other gen7 and xfi buicks.
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Brian 87 GN
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