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  • Users: gtxrt
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  1. gtxrt

    Intake manifold height

    just think if he had the rpm performer could have had a tick short of 530 HP.
  2. gtxrt

    Intake manifold height

    yes bigger plenum hurts a little torque down low and throttle response and picks up a little hp in the upper rpms. i tested 5 intakes on the street and you can find an old post of a member testing ch4b and I think a performer and weiand. it helped less than a tenth in a 1/4 mile I think it was...
  3. gtxrt

    Intake manifold height

    there is the rpm performer but not if you need hood clearance. had to mill my rpm carb top plate a 1/4 inch for hood clearance.
  4. gtxrt

    Intake manifold height

    i would do the M1 dual plane and have it ported. my cast iron i ran was ported and was way better then the ch4b and performer which were no better than stock.
  5. gtxrt

    WTB 915 or 516 heads

    Thanks I wanted some ported ones 516 would work too if ported
  6. gtxrt

    WTB 915 or 516 heads

    wanted to buy 915 or 516 mildly ported heads
  7. gtxrt

    Then Came Bronson

    he and show sort of reminds of the show with David Janssen the fugitive
  8. gtxrt

    Edelbrock AVS2 on stock dual-plane 383 manifold

    i was running a 750 edel with 2.94 gears that ran great. every so often off the line it would hesitate if the intake wasn't heated fully no big deal. wanted to try the 800 AVS2 big difference off the line and at lower rpms i would say 30 HP or TQ difference not sure which one. not much if any...
  9. gtxrt

    Edelbrock AVS2 on stock dual-plane 383 manifold

    an opener spacer helps 75% of the time a 4-hole 10% of the time and will only help mostly for throttle responses and low rpm. that is right from Big Joe engine masters king and dyno king who was testing spacers since he was 16 years old.
  10. gtxrt

    Edelbrock AVS2 on stock dual-plane 383 manifold

    if it's leaking around the throttle shaft it will be harder to rebuild. i take it you're not impressed with your avs2 carb ?
  11. gtxrt

    ported heads vs HP gain

    it must move the peak power to a higher rpm ?
  12. gtxrt

    ported heads vs HP gain

    if you have a stock engine with decent flowing heads from the factory and then take the stock heads and mildly port them. then put them on the same stock engine will there be a HP gain and or will the peak TQ and HP move to a higher rpm.
  13. gtxrt

    My new stock stroke 400 build

    duration is fine but would go with 1.6 rockers with that low lift cam.
  14. gtxrt

    Rear Diff Noise

    my point was you need to have an additive in there. ford or gm ac-delco are better than the chrysler additive. do not use synthetic lube. what weight is the lucas ?
  15. gtxrt

    Rear Diff Noise

    did you put the sure grip additive in.the gm one is the best.
  16. gtxrt

    69 383 hp

    i have used the sd on three different 440 engines one was a 4-speed with 3.54 gears and could watch the tach when the car turned on it was over 3000 rpms closer to 3400 rpms it seems but i could also holeshot it at 3500 rpm and blow the tires off. different on a automatic with a stock or near...
  17. gtxrt

    Oil pressure irregular

    that is the right filter and a good one too. i would check the relief valve it easy to do.
  18. gtxrt

    69 383 hp

    what gears and torque converter did you have.
  19. gtxrt

    Oil pressure irregular

    what is the brand and part number on the filter
  20. gtxrt

    69 383 hp

    Yes, iron or rpm performer the dp4b will not help much and the street dominator will only turn on after 3400 rpms.
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