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  #46 (permalink)  
Old 03-02-2012, 07:58 PM
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I have to go with f-bird on this one. Why 13-1, with 540 cubes and a good cam 11-1 will probably get you near the 700-800 hp range on pump gas alone. Hey it is your nickle but those are my 2 cents.

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  #47 (permalink)  
Old 03-02-2012, 09:35 PM
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The only reason why I am so infatuated with high c/r is because back in the early 90s Racing Head Service (RHS) located in Memphis, TN were still making complete turn key BBCs motors that were popular in the Baldwin Motion camaros which occurred in the 70s. That's when ('93) I tried their 454 with 12-1 c/r and the sound was so impressive in rhythm with a high lift hydraulic roller Comp cam, super comp headers, flowmaster super 40s and 3 inch pipes.
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  #48 (permalink)  
Old 03-02-2012, 09:49 PM
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There has been a ton of knowledge since those days on how to make big hp on pump gas better combustion chamber designs better cams(roller) and better head designs. Not to mention gas was much better back then.By the way 11.5 to 1 compression sounds amazing. And you even said it yourself back then .... 454 fast forward to today 540.... My 427 with 10-1 sounded meaner then my 496 with 8-1 so I guess with a procharger it's a sleeper. I am kind of enjoying it sounding a little mello I still can't hear the radio but who needs one. Pulling into cruises peoples eyes pop out when I open the hood and they see the procharger. With a 496 with 11-1 you will have more hp than you need on the street. I can't hook up as it is but thats a story for another thread
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  #49 (permalink)  
Old 03-02-2012, 10:08 PM
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This is why I'm bent on high CRs, I may be tone deaf and some hotrodders tell me that high and low compressions does not make any difference in the thumping sounds of the motor but somehow I don't believe it. That's just my preference for now. I may consider based on your input the 11-1 cr w/Lunati Stroker kit on the 496. I'll let you know the outcome on what I've chosen next week. Thanks
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Old 03-02-2012, 10:16 PM
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My 10-1 sounded amazing I can imagine 11-1 would sound even better. 496 with 11-1 nice heads roller cam man o man I am drooling. That would be one killer machine in a light car be careful. Better bet some drag radials. 750 hp on pump gas hot stuff!
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Old 03-05-2012, 10:15 PM
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I went ahead and ordered the 496 stroker w/dart pro 1 head, 11-1 forged dome pistons and a Isky roller cam 650 lift. I did some reading on high lift cams. On one of the forums I read that cast core cams is not as strong as the steel billet cams. In addition the life of the cam will even be longer with a pressure oiling from the lifters which is standard for the Isky. This is why I chose this cam. The motor will take 3 months and 8-10k to build from the machine shop so I'm looking at June/July to have it installed and ready to roll. I'll keep everyone posted on when its completed.
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Old 03-05-2012, 10:20 PM
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4 months, seems like a long time off. Sounds great though you will really enjoy that motor
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Old 03-05-2012, 10:33 PM
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It is a long time but the machine shop quoted that they were busy so I said I can wait because I have a replacement. It's a '56 beast and it is about to roll by this month. I just took it out of storage and will get the recon sticker this week. All it needs is a paint job and I'm looking at "silver/black" 2-tone (Oakland Raiders).
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  #54 (permalink)  
Old 03-06-2012, 08:56 AM
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That is gorgeous. I had silver with black stripes on my camaro then when I had it restored I had it painted black tulip.It is a very dark purple. The sight won't let me download any picture something about resolution
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Old 03-06-2012, 09:02 AM
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Quote:
Originally Posted by dasyhard
Aloha Sir,

It's always great to read your input but the cam you suggested failed and I mean in terms of the installation process, not your fault. I knew sooner or later you were going to comment of my post the way things have been going for me and what my crazy plans are. Yes this motor is a cruiser and I plan to run race gas mixed with 92 octane. This is my wish list for now but I want to be on the safe side too with no heartbreaks long term. By the same token, I want high compression with a large roller cam, even larger than the one you recommended. I know the owner of the machine shop because he already made a 540 for my chevy so he guarantees his work providing I don't F/U. I just have to think in terms of consequences with high compression ratios from now till I deliver my block next week. Thanks for your continous feedback throughout my ordeal.
You need to define failed the installation process.

The comp XR series mechanical street roller cams that use a cast cam core use a relatively mild spring pressure. (relative to a race roller cam)
The more modest "street" XR cam lobe design and matching spring pressure and intended rpm of these street cams allows the "-8" cast cam core and the roller lifters to live for many trouble free miles on the street.
They are easy on the valve train.

Proper roller cam button and reinforced timing cover and roller cam button to cover plate clearance setup to control "roller cam walk" is critical.
If the roller cam in the block is a "back walker" a thrust bushing or thrust roller bearing is used between the cam gear and block to take the load, control cam back walk and prevent timing gear to block wear on early style non roller blocks.
Block and or timing gear clearance machining is often required to install.

Cam tunnel front face boss and cam oil galley plug to back of the cam timing gear clearance must be verified too. May require clearancing.

These Extreme energy mechanical street roller cams are available in a upgraded billet cam core too.

Last edited by F-BIRD'88; 03-06-2012 at 09:29 AM.
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  #56 (permalink)  
Old 03-06-2012, 02:25 PM
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@F'BIRD 88,

Thanks for the info and the cam itself probably has nothing to do with whats happened. The speed shop that installed the cam is responding to my complaint letter by asking me to bring the lifters and pushrods to have it examined by the machine shop that did the machine work. Apparently, the speed shop is leaning towards having them liable for the mishap.
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  #57 (permalink)  
Old 03-06-2012, 02:26 PM
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Quote:
Originally Posted by bigblockragtop
That is gorgeous. I had silver with black stripes on my camaro then when I had it restored I had it painted black tulip.It is a very dark purple. The sight won't let me download any picture something about resolution
Thanks man, I never heard of black tulip but will research that color.
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  #58 (permalink)  
Old 03-06-2012, 02:55 PM
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it came out on mid and early 70's mg's believe it or no. I wanted a solid color no flakes I would have liked a shade darker but we get tons of complements. We were looking for eggplant color. In the bright sun it is a little lighter then we thought. Any bit of shade and it is the perfect color.
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  #59 (permalink)  
Old 03-19-2012, 04:48 AM
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Explanation From the Speed Shop that Installed the cam

After giving the speed shop (this shop installed the cam) the cam, lifters, push rods and distributor to analyze due to my complaint letter to them, they gave me their version of the deficiencies found:

1. The cam did not walk in accordance to what the other speed shop found when they pulled my motor. The lifters all left a dark shade on the cam lobe and that shade fitted the lifter rollers only. If the cam walked, the shade would have been wider on the lobe itself. My current speed shop's findings also indicated that there was no thrust plate and they explained that was the cause for it to walk but the cam button was present. So the end result explained by the speed shop that installed this cam is basically still in good condition to use again. Only the spline gears on the cam show a little roughness due to not engaging properly with the distributor gears but overall, the cam and kit is good to go.

2. Their analysis of why the distributor gear were not meshing with the cam's gear is "either the heads were decked out or the block was decked out"/cut/shaved or whatevers.
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Old 03-19-2012, 06:33 AM
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Ya decking the block will effect the height the distributor sits at and how the distributor gear meshes with the gear on the cam.
but because of the way the gears are cut and intermesh a small difference in height should not create gear wear.
More likely the distributor gear was cheapy or the wrong material.

is the distributor drive gear on the camshaft worn or just the distributor gear?
Was the cam timing gear rubbing on the front of the block?
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