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130lbs cranking pressure ???? #1016152 06/19/11 10:15 AM 06/19/11 10:15 AM
Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada W Wedgeman OP pro stock
Wedgeman OP pro stock W Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada	HI guys... Just finished bolting on my new set up.... Indy 360-1 heads milled to 55 cc 4 in stroker crank 10.8 cr installes a Lunati mec cam , int valve cl at 55* ABDC 259/267* dur @ .050 Only have 130 cranking pressure , wallace says I should have 190...... 130 even on all cylinder. I haven't started the engine yet, Does it make any sense at all ???? Dan

Re: 130lbs cranking pressure ???? [Re: Wedgeman] #1016153 06/19/11 10:33 AM 06/19/11 10:33 AM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Well, at least you got the same problem in every hole. It's a pretty hefty duration & late intake valve closing, but you are still low IMO. What was the starter cranking speed? Should have been around 500rpm. Did you miscalculated the CR? How far are the pistons down in the hole? Dished pistons? Valve lash set correctly? You might want to run it in a bit and then recheck it. Don't know why you would want to check cranking compression on an engine with no run-in time on it?? - even though I don't think it will come up 60 psi. Fastest 300

Re: 130lbs cranking pressure ???? [Re: Crizila] #1016154 06/19/11 10:41 AM 06/19/11 10:41 AM
Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada W Wedgeman OP pro stock
Wedgeman OP pro stock W Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada	The base of the engine and rotating assy are the same as last yesr... I double checked the calculations with the new cam specs and results should be there.. I only changed the cam and heads in the equation Last year was a 250/250* dur cam with valve closing 71* ABDC Last edited by Wedgeman; 06/19/11 10:42 AM.

Re: 130lbs cranking pressure ???? [Re: Wedgeman] #1016155 06/19/11 10:46 AM 06/19/11 10:46 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	It's new pistons and rings and never been run. valve lash is correct? You degreed the cam to 105.5??

Re: 130lbs cranking pressure ???? [Re: Dodgem] #1016156 06/19/11 10:52 AM 06/19/11 10:52 AM
Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada W Wedgeman OP pro stock
Wedgeman OP pro stock W Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada	same piston and ring as last fall....

Re: 130lbs cranking pressure ???? [Re: Wedgeman] #1016157 06/19/11 10:58 AM 06/19/11 10:58 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: same piston and ring as last fall.... What did you degree the cam in at... sounds like its retarted

Re: 130lbs cranking pressure ???? [Re: MR_P_BODY] #1016158 06/19/11 11:04 AM 06/19/11 11:04 AM
Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada W Wedgeman OP pro stock
Wedgeman OP pro stock W Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada	I just aligned the dots on the timing gear.... Could I loose 60 lbs if htey were misaligned ? Dan

Re: 130lbs cranking pressure ???? [Re: Wedgeman] #1016159 06/19/11 11:23 AM 06/19/11 11:23 AM
Joined: Feb 2005 Posts: 5,207 Menomonee Falls DemonDust master
DemonDust master Joined: Feb 2005 Posts: 5,207 Menomonee Falls	Quote: I just aligned the dots on the timing gear.... Could I loose 60 lbs if htey were misaligned ? Dan Never go by the dots unless you are installing a stock cam, even then you could be off a bit. I treat them as a reference point only. I got money that your cam is way off. It needs to be degreed... All you need is a degree wheel, coat hanger/tig rod, and a $20 gauge from harbor freight and you can get it done Last edited by R5P7Duster; 06/19/11 11:26 AM. SDG Motorsports Hellcat Demon and Redeye Supercharger CNC Porting https://www.sdgmotorsports.com/

Re: 130lbs cranking pressure ???? [Re: Wedgeman] #1016160 06/19/11 11:34 AM 06/19/11 11:34 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: I just aligned the dots on the timing gear.... Could I loose 60 lbs if htey were misaligned ? Dan Off hand I would say that is your problem... needs to be degreed in

Re: 130lbs cranking pressure ???? [Re: MR_P_BODY] #1016161 06/19/11 11:38 AM 06/19/11 11:38 AM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 master
Leon441 master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	Your cam is retarded. Once you degree it you will probably find it needs to be advance 4-6 degrees. Leon Career best 8.02 @ 169 at 3050# and 10" tires small block power.

Re: 130lbs cranking pressure ???? [Re: Leon441] #1016162 06/19/11 01:01 PM 06/19/11 01:01 PM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer master
Bob_Coomer master Joined: Nov 2003 Posts: 6,293 Rock Springs	You cant always go by those calculators. What kind of formula are they using to figure this? There is diff types of compression for sure. Even if you advance the cam its not going to be 190 PSI.. It might gain 10 lbs...maybe.. Your over thinking it.. just run it see how it goes. [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: 130lbs cranking pressure ???? [Re: Leon441] #1016163 06/19/11 01:04 PM 06/19/11 01:04 PM
Joined: Jan 2005 Posts: 12,422 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,422 Kalispell Mt.	I still don't think you are ever gonna get 190 PSI with that cam and that compression, mabey get close if you advance it a bunch but 10.5 and a cam that big ain't gonna do 190. I do agree it is low but not 60 lbs low. Should always degree it in and you need to re check piston to valve clearance AFTER degreeing it correctly. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: 130lbs cranking pressure ???? [Re: HotRodDave] #1016164 06/19/11 01:53 PM 06/19/11 01:53 PM
Joined: Jul 2009 Posts: 413 Norway (old world) Oyvind Mopar mopar
Oyvind Mopar mopar Joined: Jul 2009 Posts: 413 Norway (old world)	Did you remember to open the throttle when testing!?? My

Re: 130lbs cranking pressure ???? [Re: Wedgeman] #1016165 06/19/11 02:32 PM 06/19/11 02:32 PM
Joined: Feb 2005 Posts: 4,318 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,318 Prospect, PA	What was last years cranking compression? Did you actually measure the intake closing point? Is that the closing point at 0.050" or actual seat closing? Cranking cyl pressure won't build until the valve actually closes. Did you do the test with the engine hot? Lash will loosen (alum.head) closing the intake sooner raising the pressure. Thats probably only 5 psi.

Re: 130lbs cranking pressure ???? [Re: BSB67] #1016166 06/19/11 02:54 PM 06/19/11 02:54 PM
Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada W Wedgeman OP pro stock
Wedgeman OP pro stock W Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada	Huge mistake ! Cam gear was off one tooth ! got pressure back to 160, lunati suggests .014 lash........ setting it at .017 gives me 10 more psi I wonder why they are so small compared to a comp cam where lash is in the .020 neighboorhood... Dan

Re: 130lbs cranking pressure ???? [Re: Wedgeman] #1016167 06/19/11 09:34 PM 06/19/11 09:34 PM
Joined: Aug 2003 Posts: 43,263 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,263 Bend,OR USA	Quote: Huge mistake ! Cam gear was off one tooth ! got pressure back to 160, lunati suggests .014 lash........ setting it at .017 gives me 10 more psi I wonder why they are so small compared to a comp cam where lash is in the .020 neighboorhood... Dan Way to go It always pay to check out the cause of all problems, especially when in doubt Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: 130lbs cranking pressure ???? [Re: Wedgeman] #1016168 06/20/11 12:55 AM 06/20/11 12:55 AM
Joined: Jan 2005 Posts: 12,422 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,422 Kalispell Mt.	Quote: Huge mistake ! Cam gear was off one tooth ! got pressure back to 160, lunati suggests .014 lash........ setting it at .017 gives me 10 more psi I wonder why they are so small compared to a comp cam where lash is in the .020 neighboorhood... Dan Just different lash ramps desighned into the cam. You should still degree the cam I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: 130lbs cranking pressure ???? [Re: HotRodDave] #1016169 06/20/11 02:54 PM 06/20/11 02:54 PM
Joined: Aug 2006 Posts: 2,141 junction city oregon V viperblue72 top fuel
viperblue72 top fuel V Joined: Aug 2006 Posts: 2,141 junction city oregon	160 sounds just about right with 10.8 and that large of a cam. 190 is not likely gonna happen.

Re: 130lbs cranking pressure ???? [Re: viperblue72] #1016170 06/21/11 12:03 AM 06/21/11 12:03 AM
Joined: May 2009 Posts: 62 montreal, quebec,canada 7 7e5dartsport member
7e5dartsport member 7 Joined: May 2009 Posts: 62 montreal, quebec,canada	hi dan! i live in st-jean, which is close to ste-sophie. if you have any problems centerlining your cam, just call me: 450-349-0167. it wont cost a cent . i have the offset keys, degree wheel and piston stop as well. p.s. je parle francais. by the way, i really like your combo! serge fully legal sounds the same as full illegal...

Re: 130lbs cranking pressure ???? [Re: Wedgeman] #1016171 06/21/11 11:08 AM 06/21/11 11:08 AM
Joined: Jan 2003 Posts: 16,929 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,929 NC	Quote: Cam gear was off one tooth ! got pressure back to 160 Good catch. It would have ran like a dog with 14 degree (1 tooth) error. One tip. With aluminum heads and a cast iron block, I like to set the cold valve lash 0.004-0.005" tight, so that when hot it will be closer to the cam manufacturer's hot spec. Then check it hot for final setting. 1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1

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