Pitching the EFI!

red82gt · 04-26-2001, 05:52 PM

Okay, Juiceman, what am I doing wrong? I do not have a problem off the line, I have a problem pulling it from a roll at 2000 rpms.
I have an adjustible vacuum advance on my distributor,
I am running the carter AFB carb with 101/095 jets
and 070/047 rods
and 5" vac. step up springs,
I run 5.5psi fuel pressure,
my total timing is 32 degrees at about 2800rpms and
I've lightened the secondary butterflies by millling a 1/16" hole on each side,
the car still doesn't come alive until 3500+ rpms. With a Holley 600 DP. it wouldn't come alive until 4000 rpms and when I got it to perform its best I still ended up with it way too rich until ~5000rpms, not to mention a best of 17 highway miles. The carter give excellent fuel economy and better throttle response but it nothing like an injected car. Spread some knowledge, what would you do differently? Peace.

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GT-40 heads (ported, polished, + milled), B303 cam, 1.7rr's, JE pistons, Offy intake, Carter AFB 625cfm carb, Flowtech 1 5/8" shortys, Flowtech X-pipe, MAC Flowpath exhaust, MAC pulleys, 373's, subframes, Eibachs+Tokicos, B+M ripper, FMS Clutch, Zoom Quadrant+cable, 17" CSA Ultra rims, 235/45ZR17 Yokohama AVS S4's, MSD 6A ignition+coil, FMS 9mm wires, Carbed, Naturally Aspirated, and Nasty!

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04-26-2001, 05:52 PM	#19
red82gt Sober voice of Reason Join Date: Nov 1998 Location: Kelowna, B.C., Canada Posts: 1,514	Okay, Juiceman, what am I doing wrong? I do not have a problem off the line, I have a problem pulling it from a roll at 2000 rpms. I have an adjustible vacuum advance on my distributor, I am running the carter AFB carb with 101/095 jets and 070/047 rods and 5" vac. step up springs, I run 5.5psi fuel pressure, my total timing is 32 degrees at about 2800rpms and I've lightened the secondary butterflies by millling a 1/16" hole on each side, the car still doesn't come alive until 3500+ rpms. With a Holley 600 DP. it wouldn't come alive until 4000 rpms and when I got it to perform its best I still ended up with it way too rich until ~5000rpms, not to mention a best of 17 highway miles. The carter give excellent fuel economy and better throttle response but it nothing like an injected car. Spread some knowledge, what would you do differently? Peace. ------------------ GT-40 heads (ported, polished, + milled), B303 cam, 1.7rr's, JE pistons, Offy intake, Carter AFB 625cfm carb, Flowtech 1 5/8" shortys, Flowtech X-pipe, MAC Flowpath exhaust, MAC pulleys, 373's, subframes, Eibachs+Tokicos, B+M ripper, FMS Clutch, Zoom Quadrant+cable, 17" CSA Ultra rims, 235/45ZR17 Yokohama AVS S4's, MSD 6A ignition+coil, FMS 9mm wires, Carbed, Naturally Aspirated, and Nasty!