Ray After you re-check the TDC on the degree wheel with the piston, would you mind posting 4 pics of the pointer for the .050" open and close for the intake and exhaust lobes? Paul
Have you tried the max lift method go help rule out any potential issues with the opening/closing method? The reason I ask is that my degree wheel has 2 sets of numbers for depending on what you're measuring (intake vs exhaust). Just a thought.
The question at this point is whether or not the cam has the correct duration. It appears that the .050" duration is way less than spec. I always felt that both methods should be used. Do the max lift method to locate the lobe center and then follow up with the .050" points on both the intake and exhaust lobes just to verify all of the cam specs. This may be one of those times where checking the .050" points payed off. Paul
I'll do max life center line but like you said duration . I have the center line at 105.75 . Any who I'll do again with pics maybe I'm reading wheel wrong. Like on the exhaust closing ,it's at 67 no mater what way I read it it's a long way from .5
Yes, I'm wondering if he misread the wheel. Here's a pic of mine showing different numbers at the same point(s).
Ray According to the pictures the intake duration is only 154* and the exhaust is 162* It is as though the lifter is up a lot more than .050" when the readings are taken. The dial indicator needs to be set to Zero when the lifter is all the way down. Then as the lifter moves up the reading is taken at .050" Both lobe centers are off 30* also The only 2 things that are close to correct is the exhaust duration is 8* more than the intake duration and the LSA is 112* which is near the 110* spec. Paul
i have the dial indicator set at zero on base circle. I can spin over the crank a lot before it starts to move ( indicator)
Ray Your opening point for the intake is close and the exhaust opening point is spot on but the closing points are way too early. Is it possible that you read the indicator one turn before the last .050" dial position as the lifter was returning to the base circle? Paul
What I do is from base circle go to .50 then I go to max lift and the needle will come back down to .50 and that's where I read wheel.
Ah, you saying your closing measurement is 0.050" after max lift? If so, needs to be 0.050" off the base on BOTH sides of max lift.
Now we are making progress!!! Rob is correct. After max lift you must keep turning the crank until the lifter is .050" from being back to the cam base circle. Count how many indicator revolutions it took to get from .050" to max lift and then it will be the same count to get from max lift to .050" on the other side. Paul
Ohhhhh ok I'll try that. That would be awesom if it was me and not the cam. I really want to get the heads on and come to you guys with more problums. Thank you guys
Ok guys the new members are in intake ATDC 1.5+44 exhaust 49+3 so 1.5+44+180=225.5 /2 = 112.75+1.5=114.25 so I'd say I have to retard my bottom gear, its in at +4 now. what you guys think?
