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Re: Flat Tappet or Roller Cam? [Re: vinnyd76] #1894852
08/18/15 10:22 PM 08/18/15 10:22 PM
Joined: Jun 2005
Posts: 384
Montana
6
67DodgeCharger Offline
On vacation
67DodgeCharger  Offline
On vacation
6

Joined: Jun 2005
Posts: 384
Montana
I have looked at roller cams and roller lifters at ISKY Cams and really like what they are doing at their shop. I will be going with ISKY next spring and I already have a set of pro magnum rockers. Currently running solid lifters and I am looking for additional HP and torque. Pushing to go over 600 HP and get close to 700 torque.
Re: Flat Tappet or Roller Cam? [Re: Sxrxrnr] #1895129
08/19/15 05:19 AM 08/19/15 05:19 AM
Joined: Jan 2003
Posts: 27,468
So Cal
autoxcuda Offline
Too Many Posts
autoxcuda  Offline
Too Many Posts

Joined: Jan 2003
Posts: 27,468
So Cal
Originally Posted By Sxrxrnr
Agreed, same for a myriad of other conditions,,,misfiring cylinder, lean fuel/air ratio, insufficient coolant etc.


Which could just as well happen with a roller.

My valves springs aren't super stiff. I didn't run soft springs. Just stock E-brock that I think are about one step up from stock or so. Only .511 lift minus lash on my cam.

Just primed engine (and rotated it), diesel oil, generous amounts of comp cam lube, Justice Brothers oil additive. Ran for 10 mins tops.
Re: Flat Tappet or Roller Cam? [Re: 70AARcuda] #1895269
08/19/15 12:16 PM 08/19/15 12:16 PM
Joined: Oct 2003
Posts: 11,684
W. Kentucky
justinp61 Offline
I Live Here
justinp61  Offline
I Live Here

Joined: Oct 2003
Posts: 11,684
W. Kentucky
Originally Posted By 70AARcuda
Originally Posted By autoxcuda
Originally Posted By Sxrxrnr
Destroyed the ceramic coating on 2 inch TTI headers after 512 build using a flat tappet cam during required startup breakin. Got too hot.

Later when replacing iron heads with aluminum heads(to deal with an oil fouling of plugs issue), replaced cam with a roller and at tear down had headers again ceramic coated at a cost of some 350 bucks by the firm out of Fresno.

Because roller did not require startup breakin, recoated headers were not harmed and are doing well And I love the way the car sounds and runs. Wouldn't be surprised if picked up over 100 hp,,,cam and heads together.


Why would starting up a new motor with a roller cam run any cooler than one with a flat tappet starting up new?


If the timing was set correctly...it should not burn up the headers...have done several new tti on new engines (flat tappet)...retarded or not enough advance will make the headers glow...


iagree Unless it's lean or the timing is way off a new engines egt's shouldn't be any different than well broken in engines.
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