2 Bolt Big Block, How High can you REV - Hot Rod Forum : Hotrodders Bulletin Board
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Old 01-13-2003, 07:20 PM
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Post 2 Bolt Big Block, How High can you REV

I am looking for a new cam for this season. Have all the good stuff in the Altered (pistons, compression, 990 heads etc..) except I am playin with a 2 bolt block. My current cam is pretty wimpy considering my combo: isky 280/292, stops pullin way before the end of the track!!
Let me know what you guys think.

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Old 01-13-2003, 07:24 PM
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if you put ARP studs in the mains and they index tightly don't be afraid to put some horsepower in a 2-bolt big block, they can take it. I ran one in an econorail for years and never had a main bearing problem.
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Old 01-13-2003, 07:29 PM
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big block chevy with 2 bolt mains can handle 500-550 horsepower. i would install ARP main studs too. And the 2 bolt mains are good for about 7000 RPM assuming all machine is done correctly. those 2 bolt blocks can take more abuse then most folks think.
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Old 01-13-2003, 07:52 PM
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I run a 2 bolt 454 with main studs.It is built as a .060" over 427.I turn it to 7800rpm and make 680 horsepower on raw motor at 7100rpm,and hit it with an additional 300 horsepower in nitrous.I rebuilt the shortblock after about 200 runs because I cracked a head and thought I hurt it,and the bearings were fine.If the bock is an otherwise good condition,I dont see any need for 4 bolt caps ina drag or street motor under about 1,000 horsepower.I plan on stepping up to the 400 hp jets next season,and I am keeping my fingers crossed.
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Old 01-13-2003, 08:34 PM
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2 words that people have forgotten (or so i seem to see)... Balance It!!!!!... the best parts won't hold together worth a damn if they're vibrating like crazy... a good balancing job is well worth the $$, ask one of the more experienced members about the finer points.
$.02
-z-
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Old 01-13-2003, 08:46 PM
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uuuuuhhdghghghhhhhhh! BBBBBig block , uuuuuhhhhhgghhh! <img src="graemlins/drool.gif" border="0" alt="[drool]" /> <img src="graemlins/drool.gif" border="0" alt="[drool]" />

oh wait! i gotta big block! yeah right! a 326!!!! <img src="graemlins/pain.gif" border="0" alt="[pain]" />

[ January 13, 2003: Message edited by: bullheimer ]</p>
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Old 01-13-2003, 10:20 PM
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Did not think of ARP studs on the mains, good idea!! I have a 720 lift roller in mind that should/might push me into the 8's @ 7500 rpm. Hate to grenade something at 150+mph..ouch. Wish me luck!!

P.s.. Super Streeter, may the force be with you.
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Old 01-14-2003, 08:14 AM
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your money is much better spent on balancing than on 4 bolt main caps, and allign boring, and allign honing, and the studs... get my point? balance it and you should be fine to about 7 grand. and 700 Hp
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Old 01-14-2003, 08:22 AM
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oh yeah i almost forgot to say: MECHANICAL ROLLER CAM..... somthing like Comp CB-312CR-10 its 278/282@.050 .714/.680lift, powerband 4500-7300RPM works with 5000 stall speed in 2500-3000 lb car, its really a superstreet/supergas car and i bet it will make you FLY. you might need additional port work to take advantage of the high lift,
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