8 replies to this topic

[Kirk]

Any feed back on this cam would be appreciated

 

Thanks

 

 

 

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[I'm a Red Motor fiend]

Looks like a reasonable hydraulic street cam that should behave well.
But what's your goal? What induction will you have, head, exhaust?

[axistr]

Maybe i'm getting a bit old, but that cam has a fair amount of duration for a comfortable street driven car. If it was a solid cam it would be a bit more street friendly. Also the longer the engine stroke the less sensitive they are the cam overlap. A 202 would be slightly better than a 186. I would only expect 10-12 inches of vacuum at idle so tuning at low engine speeds could be a bit of a challenge depending on your choice of induction system. Although you may have enough vacuum for brakes I thing it would defently be on the lower side of the spectrum.  

[Kirk]

i'll be using tripple SUs HIF6

the head is a  yella terra cast iron 12 port

blue 202 block

10.5 to 1

extractors and a 2 1/2 inch single system

4 speed box

[warrenm]

It'll work ok with that combo.  

[axistr]

If the static compression is 10.5 I would normally add a little bit more. A cam that size would only allow for high 7 or very low 8s at idle, there are a few calculators programs on the net that allows you to enter all the known parameters and then recommends a static compression range.

[Kirk]

If the static compression is 10.5 I would normally add a little bit more. A cam that size would only allow for high 7 or very low 8s at idle, there are a few calculators programs on the net that allows you to enter all the known parameters and then recommends a static compression rang

 

What ratio would you recommend

[axistr]

I would generally like to see between 10.8 - 11. 1 with a cam that duration. I like to have a small quench area between the piston and head. I prefer to run .025-035 as this helps reduce the onset of detonation. When building an engine you need to workout every thing first before running out and just buying parts. You need to do correct planning. There is no value in throwing a big cam in that has the potential of 7,500 rpm when the rest of the engine components can only handle 5,500 rpm.

[Kirk]

I would generally like to see between 10.8 - 11. 1 with a cam that duration. I like to have a small quench area between the piston and head. I prefer to run .025-035 as this helps reduce the onset of detonation. When building an engine you need to workout every thing first before running out and just buying parts. You need to do correct planning. There is no value in throwing a big cam in that has the potential of 7,500 rpm when the rest of the engine components can only handle 5,500 rpm.

 

 

good advice thanks