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  1. thumper460

    POWER Vs MPG!!

    Zackly!! If the vac gage is used.. and you learn to drive by it, the MPG will be there. As for the gears.. oh hell yes!! you are right there!! the easyer to move the car... the less power is used , and the better the mileage!! and on the freeway, if you drive by the vac. gage, or by RPM...
  2. thumper460

    efi to carb gone bad

    Pull the intake off... clean up the mess, and re install it this way!! Dont use the cork gasket for the front and rear of the valley!! Use a good bead of "Ultra Blue" RTV!! also I us a little RTV around the intake ports on the heads, lay the intake gasket on.. and then the Intake!! The usual...
  3. thumper460

    POWER Vs MPG!!

    Just thinking... will more power make better mileage?? I have been asked more than a few times about a set of heads to make better MPG!! Well if the right foot gets modified also.. it is a real do able thing!! Add a camshaft.. then find the "sweet spot" on the cam and drive that rpm ( note...
  4. thumper460

    69/70 351w intake milling required?

    There is no problem!! the intke will interchange!! Just me......................... Thumper PS.. the 9.5 deck vs the 9.48 deck is nothing to be concerned with... cool??
  5. thumper460

    mystery motor

    cool!! Just me....................... Thumper
  6. thumper460

    mystery motor

    Lets try this... more than likely they are a cast unit!! I would assume that... rather than a forged unit and trash your engine on boost... cool?? Just me............... Thumper
  7. thumper460

    Tri-State Cylinder head modifications

    The ONLY issue is the valve size!! when EVER you install a head with the valves larger than the 1.85 ( Ford stock pistons are notched for only the 1.85 size) you HAVE to be careful!! Be sure to check piston to valve clearance!! cool?? we have seen a 1.900 hit out side the valve pockets on...
  8. thumper460

    need help with gt40 iron spring upgrade quick

    Shoot me an email... or pm!! cool?? I have a package that will carry the cams you are looking at... they DROP in!! and they come WITH moly retainers and keepers!! cool?? www.thumperoforangepark.com.. hope this helps!! Just me.......................... Thumper
  9. thumper460

    Numbers on Cylinder Heads

    They should be E7TE's with the heads off look on the intake runners.. it will be cast on there!! The 86 heads werent that sought after.. the E7TE's are on ALL the H.O 5.0 engines... cool?? They are going for 100.00 to 50.00 a set in the yards!! Just...
  10. thumper460

    Which will have better street manners: E303 or F303 cam? Something else?

    LOL.. but I think he was looking for "Mild mannors"? With a twin turbo.. E303 and ported GT40s the "SUV" ( Fox Hatch) was in the mid 9 sec ET's and a good street car!! I was just showing the mild aspect of the E303!! the F will work also.. but then the Mild is gone!! Just a thought...
  11. thumper460

    Does any one have Thumper gt40p's?

    We have done a few of the "bars removed" GT40 heads for some circle track cars... fast as hell and fun to watch the tech trying to figure out why that 302 Ford is kick'n so many of those 350 chevys!! Stealth is cool!! Just me............................... Thumper
  12. thumper460

    Which will have better street manners: E303 or F303 cam? Something else?

    The E303 is the best over the F303 ( for what you are asking) ! there are a NUMBER of turbo 450+ WHP on mild turbo/ ported GT40s and E303 camshaft!! just a thought!! Just me.......................... Thumper
  13. thumper460

    Does any one have Thumper gt40p's?

    Zackly... nothing like a new or used set of alum heads!! however.. in the real world where "usually" most will build one engine combo, the "Need to grow" isnt an issue... yes?? Ported GT40Ps will allow over 450 HP n/a vs the AFR that will allow over 550 HP n/a!! Now how many guys are...
  14. thumper460

    Does any one have Thumper gt40p's?

    Actually... 290 -320 WHP is do able on my ported E7s with STOCK valve size.. the 40's and the P's will allow MORE power ( when ported) then the E7s!! Dont dis the GT heads for power!! they rock!! Just me..................................... Thumper
  15. thumper460

    Does any one have Thumper gt40p's?

    The GT40s ROCK!! and when they are worked... They can fly!! LOL Just me........................... Thumper
  16. thumper460

    gt40 heads

    Keep the GT40 Valve size, the notches in the Ford pistons are made for those!! I have seen some 1.90's clip just outside the stock vale pockets.. and the 1.84/1.54 are great power builder.. cool?? Just me............................ Thumper
  17. thumper460

    Got my intake off, 351 w head question

    The C9 heads have soft seats... made back when gas was gas..LOL To fix the C9 heads you NEED to have hard exhaust seats installed ( usually 120-150.00 at a shop! then valve job and your unleaded fuel friendly!! You might have the shop check the valve guides for wear also!! The C9s are the...
  18. thumper460

    Official GT40P headed 300rwhp thread!!!

    Actually giving the lift and duration at .050 and the center lines isnt that big of a deal with a custom cam.. usually it is what is under those numbers that is where their "custom" comes in.. Just me.............................................. Thumper
  19. thumper460

    351 Windsor in a 67 Fairlane GTA?

    OK... STOP!! Why not put a big block in there?? stop messing with these small stroked engines, and go to a BIG stroked engine!! The 429 base will bolt in using the 390 mounts, need to change the FE C6 to a 429/460 C6, the trans mounts/shifter ect all change out.. drive shaft is the same...
  20. thumper460

    A few Iron gt40 heads questions

    You can get some 12 sec / high 11s from those heads when they are ported!! You WILL gain 35-50 BOLT on HP over the stock heads, and MORE when ported!! IF you have to add guides and seats... those heads have been beat to death and even thought they are fixable... they might end up too much in...
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