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Holley carb question with 440 .509 Cam. #530522 11/19/09 12:54 AM 11/19/09 12:54 AM
Joined: Oct 2006 Posts: 1,264 New York, USA Chargerfan68 OP pro stock
Chargerfan68 OP pro stock Joined: Oct 2006 Posts: 1,264 New York, USA	Is it your experiences that you have to lower the stock power valves to lower than 6.5's with the .509 cam. I know, I know..."take a vacuum reading and see what it wants". But just looking for your experiences. Have you guys had more than 7-8" vacuum with this cam on a 440. pretty stock motor with maybe 9.0 compression. Thanks for any input. Greg/ 1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.

Re: Holley carb question with 440 .509 Cam. [Re: Chargerfan68] #530523 11/19/09 01:01 AM 11/19/09 01:01 AM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	My son and I both use the MP .557 cam in our street/strip cars. I have 3.5 P/V's in his 750 and my 850. Both work very good. I dont remember the idle vacum but I believe mine was about 11-12 in nuetral and about 6-7 in gear. Ron Last edited by 383man; 11/20/09 12:03 AM.

Re: Holley carb question with 440 .509 Cam. [Re: 383man] #530524 11/19/09 02:46 AM 11/19/09 02:46 AM
Joined: Jul 2005 Posts: 1,472 Overland Park, KS. J Joshs68 pro stock
Joshs68 pro stock J Joined: Jul 2005 Posts: 1,472 Overland Park, KS.	I have a 4.5" pv . I have the .590 cam. I have 9" of vacuum at idle. I also run 20* of initial timing.

Re: Holley carb question with 440 .509 Cam. [Re: Joshs68] #530525 11/19/09 03:53 AM 11/19/09 03:53 AM
Joined: Jun 2005 Posts: 426 Califor-ni-A! MrFoFody mopar
MrFoFody mopar Joined: Jun 2005 Posts: 426 Califor-ni-A!	I have a 3.5 power valve in my 383 which has the "509". It idles at 7" vacuum

Re: Holley carb question with 440 .509 Cam. [Re: MrFoFody] #530526 11/19/09 08:32 AM 11/19/09 08:32 AM
Joined: Jan 2003 Posts: 13,374 Marion, South Carolina [><] an8sec70cuda I Live Here
an8sec70cuda I Live Here Joined: Jan 2003 Posts: 13,374 Marion, South Carolina [><]	My old 440 pulled 8" of vacuum w/ the 509 cam. I ran 3.5 PVs front and back in the Holley 830 DP I had on it. CHIP CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax

Re: Holley carb question with 440 .509 Cam. [Re: an8sec70cuda] #530527 11/19/09 10:13 AM 11/19/09 10:13 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	I used to run a 5.5 on my 509 advance the cam a bit and the bottom end and idle improve a hole lot so a 6.5 would be fine!

Re: Holley carb question with 440 .509 Cam. [Re: Dodgem] #530528 11/19/09 11:24 AM 11/19/09 11:24 AM
Joined: Jan 2003 Posts: 6,531 Jacksonville, FL Chris2581 master
Chris2581 master Joined: Jan 2003 Posts: 6,531 Jacksonville, FL	I use a 6.5 PV in my 750 Holley.383 with the 509 cam. Nautilus Racing- We use Superformance gaskets and Turbo Action converters/products.

Re: Holley carb question with 440 .509 Cam. [Re: Chris2581] #530529 11/19/09 12:41 PM 11/19/09 12:41 PM
Joined: Feb 2007 Posts: 5,080 organ M maximum entropy master
maximum entropy master M Joined: Feb 2007 Posts: 5,080 organ	6.5 here with a 496 and a 509. runs killer. gramma could drive it. for what is the good life if not doing things thoughtfully?

Re: Holley carb question with 440 .509 Cam. [Re: maximum entropy] #530530 11/19/09 04:58 PM 11/19/09 04:58 PM
Joined: Mar 2009 Posts: 2,467 Sydney,Australia tex013 top fuel
tex013 top fuel Joined: Mar 2009 Posts: 2,467 Sydney,Australia	3.5 in mine.auto with M1 single plane 825 M Demon idles@725/750 in drive Tex 5614730-tex013.jpg (112 downloads) New best ET 10.259@129.65 . New best MPH 130.32 Finally fitted a solid cam, stepped it up a bit more 3690lbs through the mufflers New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm Power by Tex's Automotive

Re: Holley carb question with 440 .509 Cam. [Re: tex013] #530531 11/20/09 03:33 AM 11/20/09 03:33 AM
Joined: Oct 2006 Posts: 1,264 New York, USA Chargerfan68 OP pro stock
Chargerfan68 OP pro stock Joined: Oct 2006 Posts: 1,264 New York, USA	Thanks for the responses, guys. It is a friend;s engine and I think I need to look for a vacuum leak. The 6.5 valve should work. When I covered the choke horn, the rpm picked up and the idle mix screws did not choke the engine down when screwed all the way in. I think we uncovered the idle transfer slot by idling up the rpm to get it to idle. I'll try spraying some carb cleaner around the carb and manifold to find it. Im pretty sure we have one. Thanks, Greg. 1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.

Re: Holley carb question with 440 .509 Cam. [Re: Chargerfan68] #530532 11/20/09 07:03 PM 11/20/09 07:03 PM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	Make sure the initial timing is sufficient before bothering with anything else. If it's got less than about 18 initial, it doesn't have enough.

Re: Holley carb question with 440 .509 Cam. [Re: RobX4406] #530533 11/20/09 08:20 PM 11/20/09 08:20 PM
Joined: Jul 2005 Posts: 8,647 ELYRIA,OH B blownzoom440
blownzoom440 B Joined: Jul 2005 Posts: 8,647 ELYRIA,OH	wouldn't a vacuum gauge help to determine the best idle advance and vacuum?

Re: Holley carb question with 440 .509 Cam. [Re: blownzoom440] #530534 11/20/09 09:46 PM 11/20/09 09:46 PM
Joined: Sep 2009 Posts: 24 Pasagetdowndena C Cranky member
Cranky member C Joined: Sep 2009 Posts: 24 Pasagetdowndena	Where is the cam degreed in at?

Re: Holley carb question with 440 .509 Cam. [Re: Cranky] #530535 11/22/09 12:47 AM 11/22/09 12:47 AM
Joined: Oct 2006 Posts: 1,264 New York, USA Chargerfan68 OP pro stock
Chargerfan68 OP pro stock Joined: Oct 2006 Posts: 1,264 New York, USA	Quote: Where is the cam degreed in at? This is one of those "I have no idea. The guy I bought it from said it's a worked to the balls 440...." I have a feeling this is a stock low compression 440 with way too big of a cam bleeding off too much cyl pressure. I am just trying to help him out as much as I can, but he doesn't know too much about the motor. Just know he installed the 509 cam and put back the performer 440 manifold. I just put on a fresh 750 holley and needed to use a 1" spacer with the fuel line he wanted to use. The vacuum leak was detected between the spacer and manifold. I think the transition slot is uncovered and the power valve will be fine once I can turn out the idle speed screw to cover up the transition slots. Thanks. 1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.

Re: Holley carb question with 440 .509 Cam. [Re: RobX4406] #530536 11/22/09 12:51 AM 11/22/09 12:51 AM
Joined: Oct 2006 Posts: 1,264 New York, USA Chargerfan68 OP pro stock
Chargerfan68 OP pro stock Joined: Oct 2006 Posts: 1,264 New York, USA	Quote: Make sure the initial timing is sufficient before bothering with anything else. If it's got less than about 18 initial, it doesn't have enough. Thanks. When I took a look at the engine, the vacuum advance canister was planted up against the heater hoses. Someone installed the dist way out of phase. I have to pull it out and move the oil pump driveshaft around to rephase the distrib. so that I can correctly dial in more advance. I hate messing with things I haven't built 1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.

Re: Holley carb question with 440 .509 Cam. [Re: Chargerfan68] #530537 11/22/09 12:59 AM 11/22/09 12:59 AM
Joined: Jul 2005 Posts: 8,647 ELYRIA,OH B blownzoom440
blownzoom440 B Joined: Jul 2005 Posts: 8,647 ELYRIA,OH	as long as you have the dist out put a lock coller on the dist shaft to keep the timing steady holding down the intermediat shaft from floating.Granger sells the coller for about 3$ 1/2"

Re: Holley carb question with 440 .509 Cam. [Re: maximum entropy] #530538 11/22/09 11:58 AM 11/22/09 11:58 AM
Joined: Jan 2003 Posts: 7,861 Witness Protection Program Kudakidd master
Kudakidd master Joined: Jan 2003 Posts: 7,861 Witness Protection Program	I use a 6.5 PV in my 750 Demon. 440 with the .509" cam.If you have an older Holley. you may need do drill 1/8" holes in the primary throttle blades to get it to work off the idle system.

Re: Holley carb question with 440 .509 Cam. [Re: Chargerfan68] #530539 11/23/09 09:26 AM 11/23/09 09:26 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	Quote: Thanks for the responses, guys. It is a friend;s engine and I think I need to look for a vacuum leak. The 6.5 valve should work. When I covered the choke horn, the rpm picked up and the idle mix screws did not choke the engine down when screwed all the way in. I think we uncovered the idle transfer slot by idling up the rpm to get it to idle. I'll try spraying some carb cleaner around the carb and manifold to find it. Im pretty sure we have one. Thanks, Greg. the 509 will not pull Donk for vacuum in a low compression engine. 9:1 is too ow for a 509 cam. If it's a vacuum carb it will be even worse. What stall is he running? what gear? it's all part of the problem. the 509 cam needs 3 things to work. Compression, gear and stall. especially the last two. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

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