99 Black Bird T/A

iTrader: (4)

The Rollmaster timing set, turns out to be something I really needed[/b]. When Jesse set up my heads and cam in his LS1 test block and degreed the cam in, the P to V clearance was very tight. He said the Rollmaster will be a very big plus on adjust the cam timing and I would have made things way more difficult without the Rollmaster adjustable timing set! Good thing I listened to my friends here on LS1tech about which timing set to get! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

The P to V clearance was .050 on the intake side with the desired clearance being .060 or more

With a 224 XE-R cam on 113 LSA with 4 degrees advance, the cam actually had ~ 4.75 degrees advance on the test block when installed dot to dot. My set up needs to loose about 1 degree of advance to gain a little more P to V clearance. If the heads and cam set up the same way in my car (it could vary a little) the cam timing will most likely need to be retarded 1-2 degrees for safe P to V clearance.

Things turned out to be tight enough for my set up, that cam really needed to be degreed in with the P to V clearance very carefully checked and set up to avoid future problems. Once again, <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" /> SRP <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" /> saved my car from another potentially serious problem. If a friend and I had done in the install as I'd first planed the cam would have been slapped in dot to dot with potential diasterous results. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

I told Jesse, it was my understanding the heads were only milled .005 for clean up but based on the way things measured out on the test block it seems possible the heads were actually decked .015
<img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />

I'm so glad <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> I listened <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> to Jesse about not getting a big reverse split like a 230/224 XE-R or a 227/224 XE-R or we could have had a real P to V clearance problem with my set up!

Scalpel

iTrader: (4)

How do you check for P/V clearance?

cenman

there are 2 ways that i know of. for both, you need to have 1 head installed w/ the rockers and pushrods on for 1 cylinder. the 'clay test', involves putting some clay on the piston and then running through one cycle. then checking the clay thickness where the valve hit. the other test involves using test springs where you're regular springs would be for that cylinder. you just use a feeler gauge to see how much clearance you have at the valve. sorry if i'm not explaining it too well, it's still early here. <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

10secondZ

iTrader: (24)

what is the lift on that cam?

99 Black Bird T/A

iTrader: (4)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by NastyC5:
<strong>How do you check for P/V clearance?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Jesse at SRP checked the P to V on his test block using test springs & feeler gauge like Cenman mentioned. He'll also check on my car with the real springs too.

10SecondZ

The main issue with P to V clearance isn't the lift in most cases it's the duration. My cam has .581 lift, the min for an XE-R cam.

10secondZ

iTrader: (24)

oh crap...so do you think my new cam will clear with my set-up?...226*/230* .576"/.580" 114 lobe...with absolute speed S2's milled .010...god I hope so lol..any help would be awesome.thanks...
carter

TimZ28

Carter you little ***** <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

What is the advertised duration of your new cam?

Tim

10secondZ

iTrader: (24)

haha what's up tim,
I don't have the cam yet..and I just called futral motorsports to try and get the specs...but they are on some kind of break and don't get back untill december 2nd...so I will post it then <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> later,

carter

TimZ28

Yeah Allan in in Orlando this week. We had dinner after the nite of fire with him.

Tim

J'sRamAir

.015"? Hehe. I thought you said .050" on Saturday. Boy would that have been bad. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

My single row Rollmaster set isn't adjustable. <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> It's only keyed once.

99 Black Bird T/A

iTrader: (4)

Have some good news on this. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> My car is together and running! SRP did an outstanding job. I'll post details later. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

On the P to V issue, in on my engine with the actual springs instead of test springs, the P to V set up a tad loose. By degreeing in the cam and installing it 2 degrees advanced instead of 4 degrees advanced, we were able to get an acceptable P to V of ~.075

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by J'sRamAir:
<strong>.015"? Hehe. I thought you said .050" on Saturday. Boy would that have been bad. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

My single row Rollmaster set isn't adjustable. <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> It's only keyed once.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Not exactly sure how much, Jesse estimate (which is more accurate than my estimate) is between .015 to .020 was milled from the heads.