Roller cam in non-roller block, 500hp possible? - Team Camaro Tech
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post #1 of 12 (permalink) Old Mar 25th, 04, 03:14 AM Thread Starter
 
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Well, I picked up my brothers rotating assy. for his 396 SBC yesterday..I'm looking for a cam and have a few questions... First one is...how big of a cam can I run and not have to worry about anything hitting? Reason I ask is because it is a 3.820" stroke and has 5.7" rods..so I'm thinking I need a small base circle cam and I wanted him to run a hydr. roller. The goal is to have a 500hp small block. Heads are Dart Iron Eagle 215cc heads 72cc chambers, TRW L-2490-060 pistons, about 10.5:1 -> 11:1 CR, and also Crane Energizer roller rockers 1.6 ratio.
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post #2 of 12 (permalink) Old Mar 25th, 04, 05:16 AM
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I would say a small base circle is a must (I-beams rods?). I love my Comp XE 294 HR. 242/248,.540/.562 106ICL and 110LSA. I estimate over 500 HP in my 406 and it has pretty good street manners. I do have a pretty big stall although I think it would be fine with a tighter one.

69 Camaro, 3650lbs., 400ci, TH400, Coan 10" converter, 3.50 gear
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post #3 of 12 (permalink) Old Mar 25th, 04, 05:23 AM Thread Starter
 
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well, it has stock 5.7 rods w/arp rod bolts and the usual rod work.

So you think its a-ok with this cam and nothing should hit anywhere correct (other then rod to block clearance)
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post #4 of 12 (permalink) Old Mar 25th, 04, 05:31 AM
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I'm not real BB savy but arn't 1.7:1 rockers standard. Are you intentionally using 1.6:1's to reduce lift? or is that a typo or am I wrong about the 1.7's

...Dennis

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post #5 of 12 (permalink) Old Mar 25th, 04, 05:31 AM Thread Starter
 
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no, not a big block...its a small block.. offset ground crank
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post #6 of 12 (permalink) Old Mar 25th, 04, 06:04 AM
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Where's my glasses? I should have seen that!!!!

Oh MaGoo, you've done it again!!

...Dennis

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post #7 of 12 (permalink) Old Mar 25th, 04, 08:19 AM
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Any small base circle cam should clear, but you certainly want to check it once it's together.

69 Camaro, 3650lbs., 400ci, TH400, Coan 10" converter, 3.50 gear
D1SC, pump gas, 9:1, 10 PSI, Water/Meth injection
1.325 60', 5.988 @ 115.4 (carb)
Switched to Super Sniper EFI 2019
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post #8 of 12 (permalink) Old Mar 25th, 04, 08:01 PM
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small base circle is a definate plus, they usually don't cost more, and the larger the cam (lobe lift) after a certain point, (read; LARGE) will also automatically decrease base circle.
but with that said, it depends on other issues as far as cam design (lift/duration,etc.). the cam i used in my 406, a solid roller, small base circle, had clearance at all the normally effected rods, but when i checked close the clearance was not enough. so i still had to clearance the rods slightly, small base circle or not. clearancing the rods is no biggee at all, so dont let that deter you, just be sure to check.

Sean

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post #9 of 12 (permalink) Old Mar 25th, 04, 08:04 PM Thread Starter
 
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thanks for all the info guys! I like Greg's cam selection, oddly enough I was thinking at first of a hydraulic XE294 cam. The problem I'm gonna have is that my brother has 1.6 roller rockers, dunno if that will affect clearances anywhere?

Since my brothers block is a non-roller block, what changes if any will I need to make other then buy roller lifters etc ?
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post #10 of 12 (permalink) Old Mar 25th, 04, 08:11 PM
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the rockers will only affect clearance within the valve train, like coil bind or pushrod clearance in the slot, for instance, and P to V clearance.

Sean

1968 rs with an old school 354" SB2.2 pump gas motor.

Repetition does not transform a lie into a truth.

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post #11 of 12 (permalink) Old Mar 25th, 04, 08:12 PM Thread Starter
 
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excellent. but is it as simple as putting roller lifters in a non-roller block, no modifications required?
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post #12 of 12 (permalink) Old Mar 25th, 04, 08:32 PM
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cant say as for hydraulic rollers, i've only done one in my 5 liter mustang, but the solids you just drop them in and go, no problem.
another nice thing about rollers is no unsightly cam break-in lobe wipeouts [img]graemlins/thumbsup.gif[/img]

Sean

1968 rs with an old school 354" SB2.2 pump gas motor.

Repetition does not transform a lie into a truth.

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