Advice on 454 .30 cam change - Team Camaro Tech
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post #1 of 7 (permalink) Old Dec 16th, 08, 11:28 AM Thread Starter
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Advice on 454 .30 cam change

Thanks in advance! Current set up is a 454 .30 over with a comp ratio of 11.2 with GM rectangular port Iron heads and cam is a crane (131311) advertised duration is 292/300 and lift is 618/638 108 lobe sep. mechanical flat tappet. Cam @.50 is 256/264. From what I understand, the comp. ratio is to high for iron heads and I am thinking of slapping a set of AFR 305 heads with the 121cc chambers to get the comp ratio down to around 10.7~10.8. I am totally lost on a new cam. The power band is just to high with the current cam and Victor intake manifold for a street car and would like to add some torque down low without sacrificing a lot of hp. Thinking of going with retro fit hydraulic roller but want to keep the HP/TQ numbers up. You guys have any recommendations? Oh ya car has a TKO-600 for a tranny and 4.11s.
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post #2 of 7 (permalink) Old Dec 16th, 08, 07:29 PM
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greg
 
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Re: Advice on 454 .30 cam change

Something milder for you with lots of low and midrange would be the Comp 282s solid flat tappet cam. 236-236 .561-.561 110 lsa. I run one in a 9.5 455 Pontiac and it has loads of low and midrange and your 454 can rev a lot higher than my Poncho. If you think that would be too mild, then the next step up is the 294S-248-248 .595-.595 lift. You can lash the Magnum solids anywhere from .015-.030 and at .018 on my 455 I get a nice rump to the idle but lash it at .022 the idle is pretty smooth and gives around 18" of vacuum.
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post #3 of 7 (permalink) Old Dec 16th, 08, 08:42 PM
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Tom
 
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Talking Re: Advice on 454 .30 cam change

Sorry, I have to say it... 30 over means .030 over that is .030 thousands, Not .30, that is three hundreds over.

69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1
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post #4 of 7 (permalink) Old Dec 16th, 08, 10:01 PM
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Ron
 
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Re: Advice on 454 .30 cam change

For a Hydraulic Roller in a Mid 10 Static Compression BBC I recommend the Comp Cams XM284HR 2200 to 5800 PN: 11-451-810 AD @ 284/290 .050' @ 230/236 .547/.547 112° LSA. Your TKO will love that 112 LSA with the flat torque curve and besides; nothing sounds better then a Marine Cam ;o)

If your Static is in the Hi-10's look consider the XM296HR 296 302 242 248 .566 .566 112° LSA Hydraulic Roller.

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post #5 of 7 (permalink) Old Dec 17th, 08, 10:20 AM Thread Starter
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Re: Advice on 454 .030 cam change

Quote:
Originally Posted by TJS69 View Post
Sorry, I have to say it... 30 over means .030 over that is .030 thousands, Not .30, that is three hundreds over.
Thanks for help. I didnt notice that I had added a . to the 30.
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post #6 of 7 (permalink) Old Dec 17th, 08, 10:37 AM Thread Starter
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Re: Advice on 454 .30 cam change

Quote:
Originally Posted by Z15CAM View Post
For a Hydraulic Roller in a Mid 10 Static Compression BBC I recommend the Comp Cams XM284HR 2200 to 5800 PN: 11-451-810 AD @ 284/290 .050' @ 230/236 .547/.547 112 LSA. Your TKO will love that 112 LSA with the flat torque curve and besides; nothing sounds better then a Marine Cam ;o)

If your Static is in the Hi-10's look consider the XM296HR 296 302 242 248 .566 .566 112 LSA Hydraulic Roller.
I hadnt even considered looking at the marine cams! I really do not want a milder cam just want to move the cams range down to the 2500~3000 through 6000~6500 mark. I am going to take a huge hit in hp if I switch to a hydraulic roller?
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post #7 of 7 (permalink) Old Dec 17th, 08, 05:51 PM
 
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Re: Advice on 454 .30 cam change

At 10.75 or so CR., I figure a 285 cam will do nicely. 290 for sure.

Heck, I bet an old Isky Z-33 solid lifter flat tappet cam will flat turn you right on!

Ask Ron if he thinks for your application, that one ground on 112/108 is OK??

Or call UDHarold here

(662) 562-4933

and ask Harold to spec. one for you.

And if you do call Harold, please say hello from ol' pdq67 for me.

Can't go wrong w/ a UDHarold cam!!

pdq67



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