1995 Lt1: shorty headers, cold air, catack, cutout and 100 NX shot.

I want a cam that has amazing NA power and will work really really well with N20.

Ive been searching, but I cannont come up with 1 single choice.

 

CC lobes #3119/3122 on a 113LSA. Gives 224/236 @ 0.050" with .510/.570" lift (1.5 rocker). Have it ground with 4 degrees of advance. You will need a 2,200-2,500rpm stall if your car is an auto and 3.73's would be nice if it's an M6.

Rich Krause

 

The car is a 6 speed, so 373s would probably go in.

what kind of hp and 1/4mile gains could I see (NA and N20) with that cam, 1.6 rrs, but no gears??

 

Most of the gain will be in the upper rpm range. You should gain a couple of tenths, more if you do the gears.

Rich Krause

 

When you have a cam ground for 4 degrees of advance, due you have to take out 4 degrees from the PCM? For example, PCM shows 30 at idle and with the custom cam with 4 degrees advance, would the true timing be 34 degrees?

Thanks,

Jody J.

 

If the cam is ground with 4 degrees of advance the idea is to still install it by "lining up the dots". This keeps the ignition and injector timing in the correct relationship to the crank but advances the valve events 4 degrees. If you want more cam advance than can be ground into the cam (typically ~4 degrees) you need to install an adjustable timing set and make offsetting changes in the PCM ignition timing.

For example, the cam I am using this year is specced out to be installed with the intake center line at 105 degrees. The intake center line would be at 109 degrees if I installed the cam by lining up the dots on the timing gears, because it could not be ground any further advanced. So, to get it at 105 degrees ICL I will have to install an adjustable timing set and degree it in so that the ICL is at 105 degrees. This will advance the timing 4 degrees so I will need to compensate in the PCM.

Make any sense?

Rich Krause

 

Got it. Thanks for the info.

Jody J.