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pistons (Read 2727 times)
matadorman 401
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pistons
02/22/12 at 23:39:07
 
has anybody used bulltear  pistons ? i need a set for my 401 they show a set 9.50 to  1  with 58cc heads
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Re: pistons
Reply #1 - 02/23/12 at 00:48:42
 
 
 Check out the Wiseco piston, pin and rings package at Campbell Enterprises, excellent quality and price.
 
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matadorman 401
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Re: pistons
Reply #2 - 02/23/12 at 14:46:00
 
i did not see std bore only 30 over  block is still std  would like to keep it that way
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Re: pistons
Reply #3 - 02/24/12 at 00:16:21
 
yeah, but you had two bad pistons, you are not likely to get away with standard bore.  The top of the bore will almost certainly be undercut, may be the reason, or part of the reason you had the problem in the first place.  Wiseco are really, really nice, and budget priced since they include rings.  But they are a LOT lighter and you will have to factor in the expense of re-balancing.  I sort of sponsor a car and that was what I gave them, Wiseco pistons and K1 rods.  I paid for the balance, too.  I thought it was that important to put good stuff in the motor.  Never look back.  
ralfy
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matadorman 401
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Re: pistons
Reply #4 - 02/24/12 at 01:38:58
 
i am just looking for a regular rebuild  it still had the stock pistons in it i did not know they balanced it from the factory  
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585eric
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Re: pistons
Reply #5 - 02/24/12 at 05:01:30
 
im in the market for pistons myself is there any reason people are not useing the bulltear stuff?
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Re: pistons
Reply #6 - 02/24/12 at 15:58:20
 
Eric if you do a search you will see many people running our pistons. I think to date maybe 400 AMC'ers in V8 and I6 run them.
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Re: pistons
Reply #7 - 02/24/12 at 19:36:41
 
With regard to balance, the reason it will be an issue with the wiseco pistons is they are maybe 190 grams lighter than stock.  This means a good bit less weight is required for counter balance by the crankshaft.  I don't know how close to stock weight a bulltear piston is, probably depends on the piston and application.  I bought replacement Venolia pistons from PAS, I had the engine professionally balanced, but the pistons were pretty much the same weight as stock so it probably was not necessary.
 
Second issue, is you seem convinced your block is going to be useable at standard bore, and in my experience even standard bore blocks with as little as 80 or 100K miles need work.  Make sure your machinist looks that block over carefully before you spend the time and money to put good pistons in it.  If I seem hard over on this, its because I have made that mistake in the past....
ralfy
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matadorman 401
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Re: pistons
Reply #8 - 02/24/12 at 22:29:20
 
sorry if came across wrong  it is not a race motor just going into my matty  i am planning on using it as a flat tow vehicle for my other matty
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Re: pistons
Reply #9 - 02/24/12 at 22:38:12
 
Definately lighter...much lighter.  Grin
 
Gets those bores checked before you make a move.  Wink
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matadorman 401
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Re: pistons
Reply #10 - 02/25/12 at 03:28:15
 
going to take the block in and get it hot tanked and new cam bearings installed  will have the bore checked then
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matadorman 401
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Re: pistons
Reply #11 - 02/25/12 at 17:48:31
 
does everything have to be balanced  when changing pistons ?
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Re: pistons
Reply #12 - 02/25/12 at 18:23:25
 
If the new pistons weigh the same as the old pistons (or close to it), no.
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matadorman 401
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Re: pistons
Reply #13 - 02/25/12 at 21:53:57
 
but if the pistons are changed as a set i should be ok
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Re: pistons
Reply #14 - 02/25/12 at 23:47:25
 
Only if they are very close in weight to the original set. If they are much heavier or more likely lighter it changes the bob weight that is used in balancing the assembly so would really need to be redone.
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