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Low compression big block #1472500 07/23/13 09:41 AM 07/23/13 09:41 AM
Joined: Sep 2006 Posts: 1,139 West Tennessee R rbstroker OP super stock
rbstroker OP super stock R Joined: Sep 2006 Posts: 1,139 West Tennessee	Has anybody used the Comp 265 DEH grind in a low compression big block? The early intake closing of 32.5* and an intake centerline of 106* makes me think that it may work out pretty well, but there is nothing like some real world feedback. This is the land of the free because of the brave

Re: Low compression big block [Re: rbstroker] #1472501 07/23/13 10:10 AM 07/23/13 10:10 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	this it? http://www.summitracing.com/parts/cca-21-404-4/overview/make/dodge looks like it's on a 110 centerline not 106. If so it should work fine. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: Low compression big block [Re: Mr.Yuck] #1472502 07/23/13 10:58 AM 07/23/13 10:58 AM
Joined: Jun 2006 Posts: 5,167 CT GTX MATT master
GTX MATT master Joined: Jun 2006 Posts: 5,167 CT	I would say it should work pretty well in almost any setup and perform similar to a stock HP cam, with a bit more kick to it and a touch more of an aggressive idle. It may idle just as good with the modern ramps. Either way, it should be fine for a stock converter though. I'm assuming its supposed to be installed four degrees advanced for an installed centerline of 106, but you can always move any cams installed centerline to get an earlier intake closing point, as well as the rest of the valvetrain events. Make sure you degree it, especially in that low compression engine. Last edited by GTX MATT; 07/23/13 11:00 AM. Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street

Re: Low compression big block [Re: GTX MATT] #1472503 07/24/13 06:19 PM 07/24/13 06:19 PM
Joined: Sep 2006 Posts: 1,139 West Tennessee R rbstroker OP super stock
rbstroker OP super stock R Joined: Sep 2006 Posts: 1,139 West Tennessee	Right. The lobe centerline is 110* but the recommended intake centerline is 106* for a 4* advance. I'm hoping that the early intake closing event and low overlap will wake up the really low mid 70's 440. This is the land of the free because of the brave

Re: Low compression big block [Re: rbstroker] #1472504 07/24/13 06:50 PM 07/24/13 06:50 PM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	not sure about cam specs lingo but should'nt it read as... 110* lobe seperation angle with a 106* intake center line for a 4* advance? this is what a hughes whiplash cam is for, low comp stock engines. early intake close to build cyl pressure and not bleed off lowend torque. I have 2 SB whiplash roller cams in stock 318s and 1 BB whiplash cam going in my 77 lopo 440 engine. that summit cam listed said with a "with sacrifice of some low end for a gain in the mid to upper rpm." not with a low comp engine. that makes a dog under 3000 rpm. IIRC, is comp cams the one with the most lobe failures at break in in the last few yrs? Last edited by scratchnfotraction; 07/24/13 07:03 PM.

Re: Low compression big block [Re: scratchnfotraction] #1472505 07/24/13 07:59 PM 07/24/13 07:59 PM
Joined: Feb 2005 Posts: 4,321 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,321 Prospect, PA	Right. The correct terminology is a 110� lobe separation angle, with a recommended installed intake centerline of 106�. The OP was correct in "...intake centerline of 106...". But of course, as someone else pointed out, install it where you want. Last edited by BSB67; 07/24/13 08:01 PM.

Re: Low compression big block [Re: scratchnfotraction] #1472506 07/25/13 09:46 AM 07/25/13 09:46 AM
Joined: Sep 2006 Posts: 1,139 West Tennessee R rbstroker OP super stock
rbstroker OP super stock R Joined: Sep 2006 Posts: 1,139 West Tennessee	Quote: not sure about cam specs lingo but should'nt it read as... 110* lobe seperation angle with a 106* intake center line for a 4* advance? this is what a hughes whiplash cam is for, low comp stock engines. early intake close to build cyl pressure and not bleed off lowend torque. I have 2 SB whiplash roller cams in stock 318s and 1 BB whiplash cam going in my 77 lopo 440 engine. that summit cam listed said with a "with sacrifice of some low end for a gain in the mid to upper rpm." not with a low comp engine. that makes a dog under 3000 rpm. IIRC, is comp cams the one with the most lobe failures at break in in the last few yrs? Please tell me more about the Whiplash in the 440. I assume that the '77 440 has a really low compression ratio just like a '75 model. Did you have to change springs and use the Hughes lifters? Do you have the cam part number? What is the rest of your setup and how does it perform? This is the land of the free because of the brave

Re: Low compression big block [Re: rbstroker] #1472507 07/25/13 11:33 AM 07/25/13 11:33 AM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	PM sent & check hughesengines.com for specs and sound clips.

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