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 don´t 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

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.

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

Those specs match my Old Faithful cam card. I run that cam in my .030+ 428 with 1:65 rollers. My heads flow 315 and I have a 3:70 gear set. If your springs can accept the additional lift it should be fine with your set-up. If you want a little more lower end pull run the Performer RPM. Also, it does respond to a free-flowing exhaust if you're looking for all the power you can get.

I would run the 236-245 in a heart beat!Tom

Ok, thanks, so then i just buy some new roller lifters and use the roller i have.


I have forge rods, douge headers

Hakan

There will be more responses. See what I they say also.

I agree with responses, so far. Use the new cam you have!!!

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.

2X Steve.Tom

.....love the 428 let us know what it runs on the drag strip if you do some racing......

Picture of the box.

I am going to take the pan of the engine and inspect if i find any gold...

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

Someone here will have access to those lobe numbers.

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

That is the OF cam on a 114

ok, is it still useable in the street for my setup?

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.

thanks glad to hear that :)

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




.

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.


.