I am going to have to flycut!!! :(
#1
I am going to have to flycut!!! :(
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.
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.
#5
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.
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.
#6
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.
#7
9 Second Club
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.
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.
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#8
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.
So far I have done everything correctly. Well as far as I know of.
Thank you for the help.
#10
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.
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.
Last edited by LilJayV10; 06-11-2010 at 12:25 AM.
#12
TECH Regular
iTrader: (1)
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.
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.
#18
9 Second Club
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?
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?
#19
TECH Senior Member
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?
Hard to see the spring in that photo, is it a check spring?