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#1
05-29-2005, 09:07 PM
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I am thinking about switching to a roller cam in my 455 it's a street driven car not a daily driver though and i was wondering are there any special parts i need to run a roller cam?
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#2
05-29-2005, 09:07 PM
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I am thinking about switching to a roller cam in my 455 it's a street driven car not a daily driver though and i was wondering are there any special parts i need to run a roller cam?
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#3
05-29-2005, 09:27 PM
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going to have to modify valley pan a bit I think.
maby think about a lifter bore brace..cant hurt those roller lifters are a bit heavier than a stock lifter I think. Might have to change push rod length. Gota be sure heads are set up for it. etc,... Mike |
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#4
05-29-2005, 11:14 PM
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Brandn is this a solid or hydraulic roller?If hydraulic use an earlier pan (65-71) will work without modification.Also use 8.650 or 8.675 lenght pushrods(be sure to check for proper valve train geometry).Some cams require the use of bronze or composite distributor gear(except Crane).If using a solid roller,good insurance to brace the lifter bore as Louisiana has stated.
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#5
05-30-2005, 06:39 AM
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I'm going to go with a hyd.roller.I've been told in the past that i will have to change my valves to run a roller cam is this true or just inexperienced info?I have #62 heads and they have the 2.11/1.77 valves already.
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#6
05-30-2005, 06:56 AM
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With a solid roller, I would use some VERY GOOD new valves, simply because of the spring pressures you'll be using. It would not be a bad idea with a HR, either. These cams make more power by moving the valve open and closed more quickly - hence you need more spring pressure to CONTROL the valve.
If you go HR, do yourself a favor and go peak around on the LS-1, LT-1 and 5.0 messege boards and pay attention to the cam sizes those guys use to run 11 & 10's. The 0.050 specs are surprisingly small. Don't use a bigger cam than you need too ;-)
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'73 T/A (sold). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 317rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust |
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#7
05-30-2005, 08:17 AM
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Talk to Ken Keefer. "Pontiac Dude". He can spec out a custom hyd roller for your needs.
I run a small hyd roller he recommended and it fit my needs perfectly.
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 frittering and wasting the hours in an off hand way.... 1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core. 
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