What would you do ?
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What would you do ?

  1. #1
    Urban Cougar Trapper Gopher711's Avatar
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    Default What would you do ?

    Took the old hag out last weekend for a thrashing and she has a slight miss , found #1 plug oil fouled and header tube dripping oil out water weep hole. Not bad for 10 + years on GM crank , 3/8" rods and TRW pistons I guess ? Looking at a Howard's 4340 Crank or Callie's Compstar with Oliver Billet Rods 6.538 " and Ross custom pistons Old compression was at 8:75/1. Looking to stay blown gas or possibly Inj alky in future. What would be a good compromise on compression ratio to have that option ? And how stout are GM cranks and 4 bolt block. I have ARP studs throughout already. Upgrade to billet caps ?? What would you guys do ?.. Might just be valve seal , maybe cracked ring , but whatever it is I think I've pushed my luck long enough LOL. Bottom end and rotating assy will be upgraded to best available parts I can afford hopefully soon ! What you guys think on cranks ? Upgrade to Callie's Magnum or Howard's Pro Max over the Compstar ?. It only a few hundred more for the Howard's and about $500 more for the Magnum ?
    Last edited by Gopher711; 12-04-2013 at 04:36 PM.
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  3. #2
    Senior Member sammyc57's Avatar
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    You can forget that wishful thinking valve seal shit, as far as anything else I don't think your gonna find a "good" c/r to go from blown gas to inj. alc., I would think yould be better off going in the other dierection from blown alky to n/a gas. But im sure somebody with more expertise will come in on this.

  4. #3
    Urban Cougar Trapper Gopher711's Avatar
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    Nobody ???? 6 Pulled heads , cylinders don't have a ridge at top but some holes have some vertical scarring I guess from side loads on pistons as they are at the bottom sides of cylinders
    Last edited by Gopher711; 12-05-2013 at 02:19 PM.
    http://oathkeepers.org
    Due to the fact that GOD limited mans intelligence , it's unfortunate he did not also limit his Stupidity !!!

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  6. #4
    Senior Member sammyc57's Avatar
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    I told you that valve seal idea was just wishful thinking. Enough oil coming through a valve seal to foul the plug would pretty much have to be plugged oil drain back holes plugged with sludge in the heads. Maybe someone will give some advice as far as comp. ratios on the alky-gas,gas-alky deal. Hope the new build goes well.

  7. #5
    Senior Member jimclauss's Avatar
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    Quote Originally Posted by sammyc57 View Post
    I told you that valve seal idea was just wishful thinking. Enough oil coming through a valve seal to foul the plug would pretty much have to be plugged oil drain back holes plugged with sludge in the heads. Maybe someone will give some advice as far as comp. ratios on the alky-gas,gas-alky deal. Hope the new build goes well.
    Blown Alky likes 11 to 1 and up,NA alky 13 to one, Blown Gas 8.5 to one or more, ( depends on
    octane ) put it on a dyno
    Last edited by jimclauss; 12-18-2013 at 08:44 PM.

  8. #6
    Urban Cougar Trapper Gopher711's Avatar
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    Gonna try and shoot for 9:1 static comp and run gas for now , got a good friend running in PE class ( Jaw Droppin Express ) on Blown alky on a similar small cubic inch BBC ( 427 stroked ) running just 9:1 and he's won the PE Class a few times so evidently it works , maybe not the ideal ratio but workable So I'm basically going to be copying his build
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    Due to the fact that GOD limited mans intelligence , it's unfortunate he did not also limit his Stupidity !!!

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