intake centerline

[blown54]

what would be the difference in running a 108 as to a 111 intake centerline (as the cam is ground)and also the same for seperation?what does that do for power production or rpm band?

[blown54]

what no one has an answer!

[Tom McDunnah]

This should help you better understand the questions you asked,happy reading

http://www.mid-lift.com/TECH/TECH-Definitions.htm

Tom

[blown54]

thanks Tom thats going to be alot of reading.i better save it till i get to work.lol

[Jay Allen]

As in *general* terms.......

For centerlines.

As you advance the cam it increases cranking compression and typically will lower the power band. Thus as you retard the cam it raises the power band. These are global changes.

For LSA, read my sticky post here in this forum. LSA is a function of the centerlines. Thus as you tighten the centerlines, inheritently you lower the LSA.

Hope this helps Jeff.

[blown54]

Thanks Jay,what would happen power wise, if a cam was made at 108 or 106 centerline and another at 111 degrees,as i was asked why mine wasn't 111.I had no answer, and said if i knew i wouldn't have to pay someone that knows what they are doing to make one for me!I don't know if this makes sense but with a n/a stick car thats light with a smaller motor wouldn't you want the lower number?

[Jay Allen]

The cam events are where the magic is. I have certain parameters that I am looking for when I design a stick. Your case was specific because of the parameters you gave. Once I had the intake events I wanted and then I had the exhaust events I wanted, the two of them together made the LSA. I put almost no thought into LSA. People who jump into a LSA discussion basically do not understand valve events and where LSA is derived. That thing will make awesome TQ and it'll pull until you get nervous! LOL