LilJayV10

iTrader: (39)

I degreed the cam in yesterday with a lot of help from Geoff at EPS.

I went to check piston to valve clearance. I had left my LS1 motor book at home and tried to the clay method. I though there was no way with a 226/230 cam I would have to flycut. Wrong. There is a nice nick in the piston from the intake valve I guess I will have to see if that valve is bent now. The exhaust has a lot more clearance.

At any rate I am going to have to cut the bastards. My combustion chambers are 64cc(reworked 5.3 heads) and I want more compression. I am gonna cut the **** out of them so I can maybe mill the heads some.

Bastards.

GTO1_OHIO

iTrader: (3)

Wouldn't have thought so either as I just installed a 227/230 with my AFRs milled to 61cc and with a .040 gasket.

What gasket did you use?

vettenuts

iTrader: (4)

I have AFR's milled to 60cc chambers and the 224/228 AFR cam. I was slightly under minimum on PTV when measured with a dial indicator. So I am not surprised at your findings. Most guys don't know what they are running, so ignorance is bliss.

Nitroused383

iTrader: (10)

What ICL did you degree it in at? How much has been milled off your heads? Sounds like you are a tooth off or advanced way too far. I had .068" intake PTV with a 224 cam and LS6 heads milled .020" with GM MLS .051" gaskets.

LilJayV10

iTrader: (39)

I am using the GM MLS gasket. The ICL is 111, which its suppose to be 110. I am going to try and get it to 110 today where it's suppose to be. Dot to dot it was 112. I am using the adjustable cam gear from Yank. I am having some problems understanding it. There are no good directions on the internet on how to do this.

I don't know how much the heads have been milled. They are TEA 5.3 heads and a local machine shop cc'd them at 64cc.

LilJayV10

iTrader: (39)

I finally figured out how to use the adjustable bushing kit and got the ICL @ 109.5 which is close enough for me. I think I had to long of pushrod last night. I used my adjustable pushrod today and got zero lash. Right now my closest point is .028 at 10 degrees ATDC. One thing I think I am doing wrong is I don't have the dial indicator parallel with the valve. Its sliding down the retainer. I am going to have make a bracket to make it level. I will post a picture later.

Nitroused383

iTrader: (10)

I used the same timing set you did with the eccentric bushings. One of them is obviously the 0 bushing with the hole drilled in center. The one that is +/- 2 degrees is the one that is slightly off center. The bushing can go in either way depending how you install the offset side, retarded 2 degrees or advanced 2 degrees. Sounds like something is really far off 110 icl should give you plenty of clearance. 5.3 heads at 64cc don't sound like they have been milled much at all.

Take a set of calipers and measure from the deck surface of the head to the valve cover rail. Compare this number to your stock heads as I can't remember the stock measurement and this will tell you how much has been milled.

LilJayV10

iTrader: (39)

I will do that. I have both sets of heads here. The intake valve is 2.02 which isn't that big. Everything seems to be going right. I am glad I am checking everything and didn't just throw it together. This seems to be one the 2% that things don't work.

So far I have done everything correctly. Well as far as I know of.

Thank you for the help.

printmanjackson

iTrader: (1)

what is the lift of your cam? what PR length are you using?

LilJayV10

iTrader: (39)

cam specs are 226@230 .598/.600 112+2 on the new ESP lobes.

Cam was installed on a 109.5 ICL, it calls for 110 but's that as close as I could get it.

Checking PTV clearance is as follows.

BDTC
15 degrees .225
10 degrees .151
5 degrees .098
0 degress .055

ATDC
5 degrees .029
10 degrees .019
15 degrees .024
20 degrees .045

As you can see there is no where enough room.

I checked to see if the heads have been milled. The stock heads measured 4.757 and the TEA heads are 4.745

I have not determined pushrod length yet. I used the adjustable pushrod to get zero lash to I could check PTV clearance.

LilJayV10

iTrader: (39)

printmanjackson

iTrader: (1)

is this with head gaskets?

LilJayV10

iTrader: (39)

Yes these are with head gaskets. GM MLS gaskets.

02sslayer

iTrader: (4)

that sucks dude, i would never think you would have to flycut on a cam that size.

Nitroused383

iTrader: (10)

Make sure your lifters are not sticking in the trays on the way back down. Push them down with the pushrods.

LilJayV10

iTrader: (39)

I am not using trays for just that reason. They have stayed square on the cam the whole time.

LilJayV10

iTrader: (39)

Me either but I don't know what I could be screwing up. Everything has been put together right and timed.

Maybe some veterans will chime in later today.

Nitroused383

iTrader: (10)

When I was checking PTV clearance on a buddies 408 with L92 heads I about crapped when we realized they had very little clearance. I didn't have an adjustable rocker so I just used the stock push rod. When I realized what was up I reset the lash to 0 while on the base circle of the cam. I just hand tightened the rocker bolt until all the play was out of the prod. Ah ha our clearance soon returned (dumb me scared myself and them). I know you said you used an adjustable p-rod just make sure you only adjusted until no play and no more at all. Also make sure you're actually doing this on the base circle of the cam.

When you degreed the cam did you see make sure what specs are on the cam card are the same as what you are coming up with? You could have the wrong cam, confirm lift and duration. How far are your pistons sticking out of the hole?

vettenuts

iTrader: (4)

My intake was at 0.069" with the dial indicator as I recall with the 224/228 cam, 114 LSA and Cometic 0.040" gaskets. You are getting your minimum right where I would expect it, 10 degrees after the piston is at TDC. Other then the angle of the dial indicator, which you are going to correct, I don't see anything you are doing wrong. Faster lobes and narrower LSA will reduce PTV so based on my measurement and your cam, your numbers don't seem unreasonable.

Hard to see the spring in that photo, is it a check spring?

printmanjackson

iTrader: (1)

only problem I see is the angle of the dial indicator. You could have the valves set deeper to increase clearance. Who did the head work?