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#1
03-03-2020, 03:23 PM
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Cam advice 428 firebird
Hi,
I am in order to buy a new camshaft and need some advice. Today i have a cc roller and cc roller lifters but i got a faulty lifter and that ruin the camshaft and one lifter. I have another roller laying around but i donīt really know if that going too fit my engine and car so well. Need advice This i have in garage (Hyd roller) INT EXH adv dur 289 306 dur 050 236 245 valve lift .570 .574 Lobe sep 112.0 The shaft i pulled out from engine was this below (Hyd roller) INT EXH adv dur 281 287 dur 050 230 236 valve lift .510 .524 Lobe sep 112.0 I maybe thinking that another solution is to swap back to a flat hyd, the are less expensive, if i do i am needed some advice what to put in for best performance on street . Engine 428 0,60over, std stroke Kauffman 310 D-port 74cc 1.5 rockers 0 deck, piston -10cc th400, 3000 stall 3.73 800cfm QJ ( EFI is coming on this engine i future) Power steering 17" wheels hydraboost brake if i dont miss mind i think the kre heads was set up to handle .600 lift, but i am not sure, Best regards to all PY members
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Firebird 1974 Engine 428 (440 cui) Kauffman D-port 310cfm Roller Cam Dougs 1 3/4 headers portmatch Qj intake 800 cfm QJ 3000 rpm turbine 3,73 Rear Th400 Caltracs |
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#2
03-03-2020, 03:52 PM
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With a 3.73 gear and a 3k stall it looks to me like you would have been liked the 288/308 in the first place. Is the 308 a misprint? 61 intensity seems unusually soft on the exhaust. That would make the idle a bit choppier.
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#3
03-03-2020, 04:02 PM
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The 289 306 cam is going to move the peak HP RPM and shift RPM higher. What connecting rods do you have in the engine?
Stan
__________________
Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
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#4
03-03-2020, 05:20 PM
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Quote:
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Only a pawn in game of life. 
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#5
03-03-2020, 07:46 PM
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I would run the 236-245 in a heart beat!Tom
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#6
03-03-2020, 11:26 PM
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Ok, thanks, so then i just buy some new roller lifters and use the roller i have.
I have forge rods, douge headers Hakan
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Firebird 1974 Engine 428 (440 cui) Kauffman D-port 310cfm Roller Cam Dougs 1 3/4 headers portmatch Qj intake 800 cfm QJ 3000 rpm turbine 3,73 Rear Th400 Caltracs |
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#7
03-04-2020, 01:25 AM
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There will be more responses. See what I they say also.
I agree with responses, so far. Use the new cam you have!!!
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
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#8
03-04-2020, 06:56 AM
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My first concern would be to pull the oil pan off and confirm that all the metal grit from the lifter and Cam failure gets taken out of the motor and pull the oil pump apart to check for scaring and crap in the check ball passage.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#9
03-04-2020, 11:09 AM
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2X Steve.Tom
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#10
03-04-2020, 11:24 AM
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.....love the 428 let us know what it runs on the drag strip if you do some racing......
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#11
03-04-2020, 12:25 PM
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Picture of the box.
I am going to take the pan of the engine and inspect if i find any gold...
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Firebird 1974 Engine 428 (440 cui) Kauffman D-port 310cfm Roller Cam Dougs 1 3/4 headers portmatch Qj intake 800 cfm QJ 3000 rpm turbine 3,73 Rear Th400 Caltracs |
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#12
03-05-2020, 01:31 PM
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Hmm Bad News,
I have take the camshaft out of the box now and the shaft in there is not what it says on the box. Is there any chance to identify it? I can not remember if i have any camcard for it. It is a compcam Håkan
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Firebird 1974 Engine 428 (440 cui) Kauffman D-port 310cfm Roller Cam Dougs 1 3/4 headers portmatch Qj intake 800 cfm QJ 3000 rpm turbine 3,73 Rear Th400 Caltracs |
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#13
03-05-2020, 02:08 PM
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Someone here will have access to those lobe numbers.
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 466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
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#14
03-05-2020, 02:11 PM
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Lobe data. The "B" does mean that the numbers I show below are off a little
lobe number - Adv Duration @ 0.006" - Duration @ 0.050" - lobe lift - lift with 1.5:1 ratio rocker arm 3120 - 304 - 244 - 161 - .383" - .575" 3122 - 290 - 236 - 160 - .380" - .570" Stan
__________________
Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
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#15
03-05-2020, 02:12 PM
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That is the OF cam on a 114
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
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#16
03-05-2020, 02:21 PM
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ok, is it still useable in the street for my setup?
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Firebird 1974 Engine 428 (440 cui) Kauffman D-port 310cfm Roller Cam Dougs 1 3/4 headers portmatch Qj intake 800 cfm QJ 3000 rpm turbine 3,73 Rear Th400 Caltracs |
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#17
03-05-2020, 02:31 PM
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It will work great and the added lift will take advantage of your good flowing heads. I'd suggest finding out what lift your current heads can handle to play it safe..You should be fine. But it's good to check.
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
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#18
03-05-2020, 02:38 PM
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thanks glad to hear that
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Firebird 1974 Engine 428 (440 cui) Kauffman D-port 310cfm Roller Cam Dougs 1 3/4 headers portmatch Qj intake 800 cfm QJ 3000 rpm turbine 3,73 Rear Th400 Caltracs |
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#19
03-05-2020, 03:25 PM
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These would be your cam card numbers....
Grind number P8 3122B / 3120B HR114.0 Rated 289 / 306 at .006" tappet lift 236 / 245 at .050" 114 LSA / 110 ICL Lobe lift .3800" intake and 3830" exhaust .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE Last edited by Steve C.; 03-05-2020 at 03:32 PM. |
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#20
03-05-2020, 03:51 PM
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When it comes to pushrods Instead of the typical common 0.080-.083 wall upgrade to something around .0116-.0118".
Do not be overly concerned about pushrod weight. The pushrod is on the slow moving side of the valve train. The additional weight of a heavy wall pushrod usually provides a much needed increase in valve train stability." Manton Pushrods http://mantonpushrods.com/tech-info/facts/ Stiffness often trumps lighter weight when it comes to valvetrain component design. .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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