no low end power

[429AL]

help,i have an 85 roller motor in my 80 mustang and it just seems like no power till 3500 rpm.It has the stock type carb,trick flow heads (202 valves) crower cam .218/.224 lift is .467/.485 with 1.72 crane rockers,torker 2 man. msd dist. mac long tubes & h pipe, aod tranny w/2000 stall,373 rear end,18 deg.init. and 35 total adv.Tried adv.everywhere from 10 to 20 init.not much help. cam is deg. at 2 deg. adv. any ideas ?

[red82gt]

The 202 valves on the heads and the torker II manifold are the culprits. My car suffers the same way, Offy 360 degree manifold, and heavily ported heads. The only way your gonna get more low end is to change to a dual plane manifold.
Personally I'd just put in a set of 430 gears and you won't notice the lack of low end.

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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!

[Skyman]

My setup makes lots of lowend by 2700rpm. look at my sig.

SKy

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-1989 Saleen Mustang #406- TFS Heads, E-303, edelbrock intake,70MM TB, 73mm MAF, off road H, headers and 3chamber flows.
12.55@107mph
Mustang owners get a 15% discount!
www.OJAIPCPROS.com

[429AL]

Originally posted by red82gt:
The 202 valves on the heads and the torker II manifold are the culprits. My car suffers the same way, Offy 360 degree manifold, and heavily ported heads. The only way your gonna get more low end is to change to a dual plane manifold.
Personally I'd just put in a set of 430 gears and you won't notice the lack of low end.

I also read another post that said that the long tube headers may be a low end killer.

[red82gt]

Originally posted by 429AL:


I also read another post that said that the long tube headers may be a low end killer.

Quite the contrary, long tube headers actually are about 10 ft/lbs better at around 3000rpm and their effects diminish as RPM's increase. At low RPM's the length of the tubes scavenge to pull more air out of the cylinders, At high RPM's the scavenging effect is not needed as much because the exhaust velocity is quite high, this is the reason that longtubes are not that much better than the stock exhaust manifolds on 96 up cobras.

Oh yeah, Sky, keep in mind that you've got a long runner manifold that has about 14" runners to build velocity to ram into the intake valve, 429AL has runners that are about 4" long.


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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!

[This message has been edited by red82gt (edited 05-28-2001).]