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  1. thumper460

    Piston ring end gap excessive on rebuild

    The second ring gap has been found that it will stop ring "Flutter" if it is wider than the top ring!! Ie: .024 top then a .026 second ring. This has been the norm on performance ring sets for a few years now!! SOOooo... check it out, yes?? Just me........... Thumper
  2. thumper460

    Will this be enough to get me there??

    at the wheels... I dont think so, at the flywheel , I say yes!! Just me.............................. Thumper
  3. thumper460

    302 ? 306 ? ported heads ? stock heads ?

    Yeah... the gears will allow a 14 sec run!! Leave the engine alone.. drop in a set of 3.70s and stop tring to guess, cool?? No matter what the engine has... those 2.70's are going to make a slow 1/4 mile car, yes?? Just me.............................. Thumper
  4. thumper460

    Gt40 heads and Cobra intake

    Nope on the MMjax.. I might have posted there, but never anything else!! Usually to surface a set of heads flat ( here in Jax Fl) your at 40-60.00 to "Mill" a set usually 20-30.00 more.. just a thought. Just me....................................... Thumper
  5. thumper460

    Gt40 heads and Cobra intake

    Ruff for figuring.. .005 off is 1cc .040 off is then ( ruffly) 8cc's .040 is the about the most before you have to become creative in getting the intake to mate up. I have done over .100 off ...!! Just me......................................... Thumper PS. CC the chamber first.. as...
  6. thumper460

    Gt40 heads and Cobra intake

    You are your way to a fun and interesting build!! Porting the GT40s is a good step!! Have a good shop do a final performance valve job to tie it all together ( that alone is worth ponies) 290 HP/ 300 tq is easily done with what you have with just the smallest hyd roller camshaft. and the GT...
  7. thumper460

    GT40 heads and intake

    just a thought... take a look in MM&FF for Oct!! Just me................................. Thumper
  8. thumper460

    351C heads on a 289...How to.

    Yep... zackly!! But I'll bet the 70 C engines were all over the place just waiting to be used in 1969!! Yes?? Other stuff!! Grumpy Jenkins tried to get the C heads on a SBC!! Befor there was a BOSS there was a SBF "Tunnel Port" like the 27's!! Just me...................... Thumper
  9. thumper460

    351C heads on a 289...How to.

    I use an adapter from PME !! costly, but worth it.. then we can use a 302 Boss Tunnel ram.... We are now bumping up the cubes and doing the winsdor lower with 4V closed heads... going to have to buy custom pistons... hell.. howabout a 393 cic, 300 CC 4V 2.19/ 1.71 valve street cleaner...
  10. thumper460

    351C heads on a 289...How to.

    LOL... Yep D.H., been a few years since we first got oily!! yes?? Just me...................... Thumper
  11. thumper460

    351C heads on a 289...How to.

    Tracim.... Good call!! And maybe that is why we used the shorter compression height on the Boss 302 piston.. Maybe that is why we called it a Bogus Boss cause we used the stock 289 rods vs the Hi-po or BOSS rods. And maybe that is why we used the C head ( as the Boss did ) vs the W head...
  12. thumper460

    edelbrock rpm II or GT40 intake on modded 302??HELP!!!

    And while you are pulling the GT40 intake and gasket matching it... if you advance that TFS1 camshaft.. you will gain more torque and HP!! You would be amazed on a 4* advance and the increases... just a thought!! Just me........................ Thumper
  13. thumper460

    Highest lift cam with stock E7's?

    The E303 will work fine.. however there are a few things the WILL need addressing also.. 1) you will HAVE to upgrade the springs/ keepers/ and retainers. The stock springs barely carry a stock camshaft!! Bumping the LIFT and the rev, not to mention that you are going to be pushing it harder (...
  14. thumper460

    Help me with a stroker debate

    LOL... just a Chevy guy whining after getting his butt wiped with a SBF!! Those guys have been whining since the 351 came out... cubes are cubes the Chevy has the longer stroke/ longer rod.. blah blah...have fun with it!!lol Just me .... Thumper
  15. thumper460

    1/4 MPH vs. Air Temp

    you bet the temp is important!! the cooler the air the denser the fuel... ever notice the car seems to have more pep at night, or after a rain?? thus the "cool cans" and icing the intakes.. Just me......................... Thumper
  16. thumper460

    Question on GT40 Heads vs GT40P Heads

    Ps are the better heads with the improved exhaust runner and plug location and chambers.. the Ps will out floe the 40s in the exhaust, and yet is uses a smaller valve size!! cool , huh?? The header issues can be fixed with a shorter spark plug/ 45* angle boots/ or a small ding to clear...
  17. thumper460

    COMPRESSION TEST RESULTS PLEASE HELP!!

    From 100 to 120... I would think you kissed a valve on the heads while you were making the adjust!! IF you can get the engine warm, then try the dry/wet test again... the oil could have need OFF the rings and needs to get warn to help seal the WEAK rings.. after the warm wet/dry.. IF the...
  18. thumper460

    what valve springs do i need???

    It is suggested that you have 130 seat and 320-330 open!! you will need to change the rotaters on the stock heads as well!! And as said above... give me an email, and let me se what I can do with the drop in / no machining spring kits!! cool?? Just me........................... Thumper
  19. thumper460

    head selection

    acrually.. the hear shaped are the E6 heads and are 69 cc's as are the D8's. The E7s are a 62 CC and are the best of the three!! Look at the exhaust ports... now try and even stick your finger in the D8's !! the chambers and ports are the best on the E7s!! cool?? Just...
  20. thumper460

    iron head choices

    Iron heads... GT40's.. GT40P's, Ported E7s or ported GT40s.. they all will allow over 400 BHP and most HCI combos are pulling 150+ whp!! Get what you can.. then you can always upgrade with port work.. yes?? Just me.................................. Thumper
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