Author Topic: rpm edlebrock headed 493 it is yay  (Read 475 times)

Offline cudabob496

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Re: rpm edlebrock headed 493 it is yay
« Reply #15 on: August 22, 2017 - 04:30:44 pm »
My Challenger has a 493 with Holley Street Dominator intake and 1 7/8" headers. First I had a stock dual plane intake on the engine for looks, combined with a compcams XE274H, which looks similar to the Lunati 704. The intake and cam were the bottleneck in the engine, power curve went down above 4500 rpms.
Changed to the Holley single plane intake (dual snorkel cleaner under stock bulge hood) and put a Lunati Streetmaster 302 in it. This one has 285/285 degrees, which seemed to be more suiting because I have headers.
The result is a very streetable engine (have automatic). A lot better than with the tamer cam.

yep, the big plenum single planes are essential for a big block to breath at high rpm
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"




Offline cam440

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Re: rpm edlebrock headed 493 it is yay
« Reply #16 on: August 23, 2017 - 05:14:39 pm »
Thanks guys what's your thoughts on solid cams have not had one in years are they a pain setting valves all the time or is it a more once a year deal my mates not using a new xs 282 comp solid good power range 2500 to 6500,  246/251 I think at 50 I think   not a crazy big cam also been offered a ch4b edlebrock intake the street Dom is better still hey for a stroker ??? , that xe 274 that's not a bad cam I run that in my 65 gto with a 400 Pontiac engine , 2500 stall and 3.42 rear  good strong mid range  but you had nearly 100 more cubes sounds like you like the new cam then how's the idle sound , just looked at the spec on your new cam that you run ,108 lobe would make it sound nice , I like lunati they look a good cam
« Last Edit: August 23, 2017 - 07:16:19 pm by cam440 »

Offline cudabob496

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Re: rpm edlebrock headed 493 it is yay
« Reply #17 on: August 24, 2017 - 01:36:34 am »
Thanks guys what's your thoughts on solid cams have not had one in years are they a pain setting valves all the time or is it a more once a year deal my mates not using a new xs 282 comp solid good power range 2500 to 6500,  246/251 I think at 50 I think   not a crazy big cam also been offered a ch4b edlebrock intake the street Dom is better still hey for a stroker ??? , that xe 274 that's not a bad cam I run that in my 65 gto with a 400 Pontiac engine , 2500 stall and 3.42 rear  good strong mid range  but you had nearly 100 more cubes sounds like you like the new cam then how's the idle sound , just looked at the spec on your new cam that you run ,108 lobe would make it sound nice , I like lunati they look a good cam

I love the solid roller I have. A solid roller is about the best cam for mondo power. After a few years of minor adjustments, the lash has not changed in last 5 years. Now I check it every two or three years, and a couple, out of 16, might be a half of a thousands out.  Running 5W-30 full synthetic is a big factor too, since the valve train is the last area to receive oil on startup, and synthetic flows twice as fast as dyno oil, for same weight. So, less metal wear means less lash adjustment needed. My fuel pump push rod, after 15 years, only showed 5/100 inch wear, again due to synthetic oil I believe.  Also, setting lash it pretty easy, once you do it a couple times.
« Last Edit: August 24, 2017 - 01:38:07 am by cudabob496 »
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"


Offline cam440

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Re: rpm edlebrock headed 493 it is yay
« Reply #18 on: August 24, 2017 - 02:05:51 am »
hi cuda bob I mean solid as in not a roller cam if that's any different , yes everybodys saying go roller cam but yeah just the cost that's all in setting it up  , or is maintaining  your saying in a solid mech compared to a roller solid cam the same , I get confused that's all lol

Offline cudabob496

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Re: rpm edlebrock headed 493 it is yay
« Reply #19 on: August 24, 2017 - 01:18:09 pm »
yes, confusing. All has to do with the type of lifter, in my opinion, and how the lifter rides
on the camshaft.

http://www.hotrod.com/articles/1211phr-understanding-cam-types/
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline cam440

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Re: rpm edlebrock headed 493 it is yay
« Reply #20 on: August 24, 2017 - 02:42:37 pm »
That's a good article thanks mate

Offline moper

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Re: rpm edlebrock headed 493 it is yay
« Reply #21 on: September 05, 2017 - 09:44:39 pm »
I'm on a bunch of sites doing tech - so sometimes this one gets neglected. Sory for that.
Dwayne is the man for custom camshafts. I don't think either Lunati's or Comp's tech people will help you any more than the catalog does.
If it was me I'd be running a solid flat tappet. No reason not to. They give you more lift under the curve, which leads to more torque which is what you want. Crane makes some good (albeit expensive) grinds that might work. But if you are dead set on manifolds - custom is the way and get ahold of Porter Racing Heads. I've also heard good of Mike JOnes but never talked with him before.
The catalog grinds - I like to stay away from the HL series Comps. The Comp XS282S would be my #1 choice. Crane's 681201 would be #2. Lunati  30230741 would be my #3. Make sure the springs match the cam choice... And not because the lift numbers work. They have to match in open and seat pressures. Usually Edelbrock as supplied are not strong enough for any of those choices.

Offline cudabob496

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Re: rpm edlebrock headed 493 it is yay
« Reply #22 on: September 05, 2017 - 11:19:27 pm »
my solid roller is a Crower, and has been working great for 17 years
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline cam440

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Re: rpm edlebrock headed 493 it is yay
« Reply #23 on: September 06, 2017 - 06:14:11 am »
Hi guys thanks for your replies I tried calling Dwayne porter a lot of times and it's hard yes with the time difference but no luck he sounds like a great guy but I'm  disappointed I didn't get a chance but ohh well and like you said comp and lunati techs Were only as helpful as their web sights so I just googled more stroker cam choices and this guy called fire fighter Ron came up in the charger forum all the time and was always happy to help out really anybody who wanted advice and to be honest I emailed him asking all types of questions and he absolutely showered me in kindness , what a great guy (was honest and told him I have a cuda not a charger)and I told him my goals and what my combo is and he recommended that first cam choice you said the  xs282 but on a 112 lobe (what's your thoughts on 112 lobe I was worried it would tame the idle to much lol  )so that's what Im ordering and I think I will be really happy , I really wanted manifolds but I think I'm better off with a good set of Tti headers so that's what I got as well , I know everybody gets busy that's Life I guess hey so I want to thank all of you who take the time out to chat with me , sadly there isn't to many lol ohh well **** happens hey ,take care chat soon Aussie cam
« Last Edit: September 06, 2017 - 07:18:45 am by cam440 »