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So I finally got my trickflow 190 powerport heads installed & got the car on the dyno. My previous heads were a set of EQ magnum heads that were done up by IMM. Very disappointing results, car only gained 2 rwhp and 6 rwtq. Guess the EQ heads were the real deal, should have left well enough...

Hey members, looking for a little help with carb tuning. My carb currently idles at 12.6, cruises at around 14.8 AFR at light throttle. WOT is a solid 12.8 AFR. My problem is at half throttle I go lean 17-18 AFR, then if I mash the pedal down a little further back into 13-14 range. How do I get...

Does anyone know what happened to Duncan motor sports. I really like their pistol grip automatic shifter handle, but the website domain is gone. Anyone have a used one for sale or know of a way to contact them?? Any help would be great, thanks..

I recently had my 340 duster on the dyno and overall everything seems pretty good, except for a lean spike around 4300rpms. Anyone know how I can drop the Afr a little at that rpm? I was thinking maybe a different power valve, currently running a 6.0 which is about half the vacuum I pull at idle...

Took my 71 340 duster to get dyno tuned, end result 271 HP & 277 tq on a dyno jet. This seems pretty low to me, I was looking for a little over 300. Mods are ld340 intake, voodoo cam, 650 quick fuel carb, headers, 2.5" exhaust, fbo ignition, stock J heads. Do these numbers seem right?? Motor...

Hey guys, New to the site and had a question about valve springs. Been doing some research on cams and I think I want to run the lunati 60403 in my 340. Car is basically stock except for headers, ld340 intake and a holley 650dp. I don't want to have the heads machined to run the lunati dual...