In light of all my problems I have had lately, I decided it would be a good idea to post up all the specs on my cam card to make sure everything checks out ok. I had it custom ground...so I guess their is a posibility of something being wrong...so here it goes....

gross lift .588/.591 actually .5916..so a .592 (multiply lobe lift by 1.7)
duration@.006 277/279

valve timing @.050 intake is 6 open btdc / 42 closed abdc
exhaust 51 open bbdc / 1- closed atdc

108 icl

duration at .050 228/230

lobe lift .3460/.3480
lsa= 112

thats everything.

Everything look ok???...as in nothing is out of balance or something...the only thing im not sure about is the valve timing.

Will this cam have a nice lope?

What is my overlap? Doesnt this determine how much it will lope...along with lsa?

thanks a lot

 

I'm coming up with 5* of overlap, so it should have a nice lope to it..nothing too radical. And yes the LSA affects the overlap...you have a 112 LSA with 4* advance ground into the cam. The same duration cam say on a 110 LSA with a 110 ICL (no advance ground in) your overlap would be 9*, giving a little more "lope"

 

I could be wrong but I think you could retard your cam 2* and that would be the same thing, giving you 9* of overlap...someone correct me if it doesn't work like that.

 

While we're posting numbers Mind if I mini- hi-jack the thread here was the cam card I got the other day.. Im guessingb y the numbers it is 112 with 2* of advance??

Grind# 25-228R112
Gross valve lift .588 int, .588 Exh
Duration at .006 Tappet lift 277 int 277 exh

Valve timing @ .050 Int 4 BTDC 44 ABDC
exh 48 BBDC 0 ATDC

Cam installed @ 110 intake center line


Duration @ .050 228 int, 228 exh
Lobe lift .346 .346
lobe sep. 112

Looking at the two, they look pretty similar Will be about 3-4 weeks before I can get mine installed though

What was the formula for the overlap? Haha going to re-read the cam faq

Thanks

 

Advancing or retarding your cam won't change the overlap. Retarding your cam will close your intake valve later and open our exhaust valve later. This will move your power and torque peak to a slightly higher rpm.

 

To advance or retard the cam you would need the adjustable timing chain right? With a regular ls1 or ls6 timing chain you are pretty much stuck with what the cam is set at right?

The 228R @112 looks alot like the FMS FM 10 228/228 .581/.581 112

Does FMS use different lobes than the COMP XER ones?

 

4* overlap

go to the Cam sticky at the top of the page...scroll down to the VE calculator...it's the ****, does a lot of neat stuff.

 

They look similar...but mines a little bit bigger

 

i found where it defines the overlap but not how they compute overlap, nor does it mention what is considered alot or high overlap vs minimal overlap

5* doesnt sound like that much. (

FMS uses the Cam Motion lobes so the faq says

 

Patrick G

Comparing two cams lets say I have a 228/232 110 +0 and 224/228 108+0, they both have the same overlap and EVC time 6* (atdc) would these two cams have similar PTV clearance or would I still be better off going with the 224/228 108+0 since it has less duration to clear milled heads??

 

http://users3.ev1.net/~black_ops/cam...calculator.xls

here's the link

 

talk about a hijacking... no big deal

 

sorry...

 

When do you get your cam installed?

Im wondering how much more you are going to benefit from it with your mods than me with mine.

I plan on having the pacesetter LT's with tsp Y-pipe put on, as well as the ported TB, LS6 manifold and 4.10's put on.

Will be curious to see the difference. Im sure ill pst the results of mine once Jeff @ CAM is done putting my baby together

 

Ahh and I forgot to mentiont he UD pulleys. Seems other than the true duals vs my open plate borla.. we will have similar set-ups. With heads being the only other real difference )

Wish I had the money for those too hehe.

What are your numbers and best time so far?

Do you have a regular Z28 hood or did you go with an after market one?

Just got my SLP HO ram air hood installed.. and can't decide whether to try and put in the VOlant CAI and do the fra on it or to leave the whisper lid on it with the fra. Also hve the fast toys ram air kit witht he scoop at the front air dam.

We could prolly turn that topic into another whole thread lol.. anways Ill keep an eye out for those numbers and will chuck mine up once i get the new toys installed.

 

I am in the process of installing as we speak...but I dropped a lifter..forgot to remove one when I pulled the heads and it dropped when I pulled the cam.

And I also ran into a big ordeal with my heads...in another post.

So who knows when Ill be done. But I planned on having the car tuned the 1st of june. Thats when I should have my numbers up. Ill be on a mustang dyno at EPP....so the numbers will be slightly lower than what a dynojet would show...usually around a 5 percent difference from what I have gathered on this board

I am guessing Ill have you by about 30-35 to the wheels since you have no pulley, heads, 4.10's and I got duals and a slightly larger cam.My compression will be up a full point or more after the heads as well
And my car is a stripper, no gfx, z28 hard top....Id tear you up

Ive got fra done and plan on buying the ssra soon...but Ill probably do that after the tune since it wont even help on the dyno..and I have spent enough money this year