quick question when i got my xe 230/236 cam from thunder the slip had the cam but then it had 4 degrees advanced or something what does that mean?

 

It means that the valve timing events are 4 degrees advanced and instead of the LSA, ICL and ECL being 114, it will have a LSA of 114 and an ICL of 110 and ECL of 118.

If it is a 112 LSA, it will have an ICL of 108 and ECL of 116

If it is a 110 LSA, it will have an ICL of 106 and ECL of 114

NightTrain66

 

and instead of the LSA, ICL and ECL being 114, it will have a LSA of 114 and an ICL of 110 and ECL of 118.

If it is a 112 LSA, it will have an ICL of 108 and ECL of 116

If it is a 110 LSA, it will have an ICL of 106 and ECL of 114 is this good or bad? i thought i was just getting a 230/236 112 cam?????

 

so is this good or bad did i get the right cam?

 

I believe having a cam ground at 4 degrees of advance tends to shift the powerband down in RPM a bit, which is a good thing if your putting this into anything other than a forged motor that can turn 6000+ reliably.

 

Most Comp cams will be 4* advanced unless you order one from them and have them grind it differently.

This just means that the intake valve opens 4 *earlier, closes 4* earlier, and the exhaust valve opens 4* earlier and closes 4* earlier. This will "usuallY' trap a lil more cylinder pressure and make more low end HP.

All things being equal, this will move the RPM range down 200 RPM or so. Instead of the cam pulling from 2600 to 6600, it will pull from 2400 to 6400.

There is nothing wrong with it. this is the cam that most people are running. With out mapping out the cam and knowing what to look for, you pretty much have to trust the above paragraphs.

I have an idea on what to look for but a custom cam grinder would know EXACTLY when the valve timing events need to happen. These people do not share this info willingly so you either pay them for thier services or just use these catalog grinds.

FWIW, the 230/236 112 LSA (advanced 4*) is the same grind alot of people use and make 370-390 RWHP or so and still make good TQ from 2500 RPM and up.

NightTrain66@msn.com

 

thank you for the replies,i feel a lot better cam and heads should be done tomorrow.