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cam and higher rockers

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dbane

New member
Hey everyone. I've got a question just curious. I'm running xp cam, stock heads e85 and supporting mods. What would it take to run 1.9 rockers with the cam? Would there be a real benefit to this?
 


You would need to clearance the valve guides for the lift. Ensure the springs bind height wasn't an issue. That's just from a make it possible. I'm not entirely sure 1.9's are good on an XP
 
Could I do this with stock heads or would I need to get maybe some stage 2 heads? And would there be a real benefit?
 
You would need stage 3+ heads. It's all about the lift.

It's tough to say how much of a benefit it would give you. Most do heads and rockers at the same time, so ... how much was heads and how much was rockers is the question
 
I always say pick one or the other.

It's either bigger cam or do smaller pulley size with better rockers.

The cam already allows for better airflow in and out the engine.
 


dbane said:
Right, that I know. I was just curious if there was any actual benefit to running both.
Click to expand...

It all depends what you want to achieve... As to the benefit of which you speak! What benefits are you looking for?

Cam lobe, duration, lift, separation angles, ramp rate will all play into what you are asking. Do some research... But as mentioned, with an XP cam, you're going to wind up with some crazy lift 212/224 .325/.335 116... With 1.9 rockers will give you .617/.636 lift respectively. You won't be able to do that on stock heads... (See above)
 
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