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Message: <blockquote data-quote="The Electrician" data-source="post: 1343675" data-attributes="member: 20817">Bore: 3.572"Cams: MHS TFS N/A Stage 3Here are photos of the cams found them on the web<img src="https://lh3.googleusercontent.com/-EnMzH0dU6sY/VTvb3RtaWPI/AAAAAAAALLE/woQlnlSNXE0/w1000-h750-no/camgears.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="https://lh5.googleusercontent.com/-QtIzPe381QE/VTvb2Nj4c5I/AAAAAAAALK4/Q25oQjzRrps/w1000-h750-no/cam.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Duration Advertised : 273 / 275Duration at .050" : 233 / 236Lift : 550 / 550Centerlines : 106 / 112LSA : 109<a href="http://www.classictiger.com/mustang/CamChart/CamChartCandDr3-1.htm" target="_blank">http://www.classictiger.com/mustang/CamChart/CamChartCandDr3-1.htm</a>Intake Opens BTDC: 10.5Intake Closes ABDC: 42.5Exhaust Opens BBDC: 50Exhaust Closes ATDC: 6Overlap: 16.5The block is not decked yet, I'm waiting for the parts to be deliveredAccording to MHS article "Recession Buster Combo" <a href="http://www.modularheadshop.com/recessionbustercombo.aspx" target="_blank">http://www.modularheadshop.com/recessionbustercombo.aspx</a>Decking the block.012~.015 is safeI planed to deck the block 0.023" after reading this replay by nickmckinney of MHS at corral"If you zero deck the block or better yet run the piston slightly outside the deck you not only gain compression you also at the same time gain resistance against detonation (sounds backwards but its very true) Race engines that are forced to run on pump gas have the pistons just about touching the heads at higher RPM. You can run the pistons to within 0.025" of the heads on these motors if you blueprint everything (and some race motors go 0.020" I know of but they have bigger cahonas than me)"<a href="http://forums.corral.net/forums/10311459-post14.html" target="_blank">http://forums.corral.net/forums/10311459-post14.html</a>and this replay by him at modularfords"Quench on a PI head is worthless unless you can get the piston to the head clearance down to 0.036" or closer. Since the head gasket is 0.036" compressed you need the piston right at zero deck or slightly out of the block. I have seen 0.025" used up to 7500RPM without a problem on these. Those hyper pistons have a lower compression height so it means you have to deck almost double off the block to be able to quench it (remember I said on my piston design I wanted the compression height "raised" as an option or else I wouldn't sell it) Try to deck that much off a block get ready for a serious bill at the end and also getting the timing cover and valve cover rails to line back up nicely."<a href="http://www.modularfords.com/threads/183097-combustion-chamber-quench-area?p=1769820&viewfull=1#post1769820" target="_blank">http://www.modularfords.com/threads/183097-combustion-chamber-quench-area?p=1769820&viewfull=1#post1769820</a>but to be safe I think I should deck the block 0.018"~0.020"What do you think about that?Also, Do you think 4.30 is too much?would 4.10 gears ratio be better?</blockquote>