High Performance Big Block Cadillacs
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Author Topic: Cad 500 rig  (Read 11025 times)
GearDrive
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Posts: 14



« on: November 09, 2009, 04:04:37 PM »

Mostly stock 500


* 500.jpg (113.36 KB, 1017x713 - viewed 310 times.)
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ST Dog
C4
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Posts: 499



« Reply #1 on: November 09, 2009, 08:32:36 PM »

That looks like fun.

How about some details on the setup, particularly the engine.
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GearDrive
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Posts: 14



« Reply #2 on: November 10, 2009, 07:07:57 AM »

76 500 35,000 miles

Edelbrock intake, stock Q'jet

Modified BBC headers

Plenty of torque to pull the 44 inch tires over anything.
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sMiles
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Posts: 321


« Reply #3 on: November 10, 2009, 03:25:53 PM »


Are you the fabricator/builder ?

Is it street legal and licensed ?

What activities do you participate in with it ?  Where ?

What is your plan for the engine build ?

What transmission,  transfer case,  axles,  gear ratios ?
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GearDrive
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« Reply #4 on: November 11, 2009, 07:07:17 AM »

http://www.youtube.com/watch?v=fYda37YzWAs

I am the builder/fabricator.

Trying to make it street legal.

Silver Lake Sand Dunes, Michigan. Trail riding, rock crawling.

Always need more power.

Turbo 350 trans, Np205 t-case, dana 44 front, 60 rear 4.10 gears. Open diffs for now.

Full hydraulic steering, 16 inch travel coilover shocks.
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GearDrive
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Posts: 14



« Reply #5 on: November 11, 2009, 10:09:17 AM »

Eventually I want to build something in the 500-600 hp range.

That would mean upgrading to a TH400, stronger axles, lockers, ect.

Right now I'm in the planning stages of my tow rig. The wimmpy 350 Chevy needs to be replaced.

I have a running '76 500 to go in place, but want to enhance it a bit.

Any advice?

I'm thinking, Edelbrock intake
                 bigger cam
                 upgrade rocker arms
                 headers

The truck is a 3/4 ton with 4.10 gears, I have a set of 36 inch tires also.

Will this be a good combo?
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dave brode
C5
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Posts: 1074


Best of 11.66, 113.96, 1.59 sixty


« Reply #6 on: November 11, 2009, 06:08:56 PM »



Right now I'm in the planning stages of my tow rig. The wimmpy 350 Chevy needs to be replaced.

I have a running '76 500 to go in place, but want to enhance it a bit.

Any advice?

I'm thinking, Edelbrock intake
                 bigger cam
                 upgrade rocker arms
                 headers

The truck is a 3/4 ton with 4.10 gears, I have a set of 36 inch tires also.

Will this be a good combo?

GD,

fyi, I ran a re-ring and bearing'd std bore '75 year 500 in my '71 C-10 truck last year. All stock '75 internals except for cam and springs. Howards 292/302 - 232/240 at .050" on a 112, advanced 6*. Edel intake, QJ, 1.875" headers, points. Heads were ported, but retained stock '75 valves, intake roofs raised in heads apx .150", edel raised a bit to match. Single Somender groove in each chamber. 4.10 gears, shifted at 4700 ish, went though at same.

Went 12.97 at 100 though the exhaust on dot legal tires on 87 octane.

Dave
 
Edit: I decked the block .013" for zero and cut .024" from the heads. Static CR was 8.6-1.
« Last Edit: November 12, 2009, 05:29:52 PM by dave brode » Logged

3960 lb '71 C-10. 11.7-1 CR 514". PEP I beam rods floating MTS 18cc dish Probes, Elgin solid cam, home ported heads, MTS 2.19/1.84", Potter/Probe shaft rockers, edel 2115, 4781 850. Switch-pitch TH400, 12" 1800/3200 Tri-Shield convertor, 4.30 gears. Best so far of 11.66, 114.8 mph and 1.59 sixty
~JM~
Shop Keeper
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Posts: 1853


« Reply #7 on: November 11, 2009, 10:35:30 PM »

GearDrive,

Welcome to the forum. That's a good looking Rig you have there!  Cool

I'm interested in your thoughts & experiences with your Dana 44 front axle. I had originally intended to use a HD Dana 44 under the front of my CJ-7. What do you think about running the Dana 44 or a Ford 9" based axle with a 35" to 37" tire & Cadillac power?
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PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
GearDrive
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Posts: 14



« Reply #8 on: November 12, 2009, 07:11:28 AM »

JM

Thanks,

I haven't had any problems with the front 44 yet. but I haven't beat on it real hard, or have a locker in it.

When it does break, I'm thinking of going to a Dana 60.

There are a lot of options for front axles. Depends how much $$$ you want to spend. I've seen D60's break in front of jeeps.

If you do go D44 get the good chromoly shafts.
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~JM~
Shop Keeper
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Posts: 1853


« Reply #9 on: November 12, 2009, 11:55:38 AM »

...There are a lot of options for front axles. Depends how much $$$ you want to spend. I've seen D60's break in front of jeeps.
If you do go D44 get the good chromoly shafts. 

That seems to be the problem... Trying to get straight answers that are comparable. There are so many variables on driving styles, terrain, etc. Too many drivers these days have no concept of finesse or respect for their equipment & just beat the hell out of it until something breaks. Then they place the blame entirely upon the part that failed.

I had a nice D44 (I believe it was a HD 8-lug unit) out from under a low mile early Suburban that I had originally intended to use up front. After hearing so many stories of D44 failures, I began to second guess myself. I ran across a GM D60 for a reasonable price about that time & picked it up. I then sold my D44. I now have the D60 for the front & a D70-1U for the back with 4:10's in them. I have no doubt that these axles will provide me with as close to 100% reliability as can be expected, but I'm not that excited about slinging a thousand pounds of unsprung weight under my Jeep. I was able to weigh the D70 shortly after I bought it & I recall it weighing 385 lbs. I believe the D60's are generally considered to be in the mid 500 to 600 lbs. range.

I looked at what was available in Ford 9" based axles several years ago & was Shocked  at the pricing. Maybe it's just me, but I don't think a pair of axles should cost more than your entire Rig, plus the new engine/tranny/transfer-case swap, etc.  Undecided Cry Huh?   At this time, I am no longer up to speed on what is available & the pricing. Has there been much development in axles that are not as heavy? I don't suppose any of this stuff has become any more affordable in the last 5 years?

Thanks
~JM~
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PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
GearDrive
C1
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Posts: 14



« Reply #10 on: November 12, 2009, 03:59:37 PM »

JM,

The D60 front and D70 rear should hold up to a torquey Cad. Are you going to have them narrowed?

I haven't checked prices lately on axles, and don't think they'er any cheaper.

Dyna-Trac had some "light weight" axles they built, seems like around $10,000 a peice.

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dave brode
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Posts: 1074


Best of 11.66, 113.96, 1.59 sixty


« Reply #11 on: November 12, 2009, 05:29:02 PM »

gd,

p.s. - For a tow rig, I would run less cam that I used in the engine described in my #6 post.

Dave
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3960 lb '71 C-10. 11.7-1 CR 514". PEP I beam rods floating MTS 18cc dish Probes, Elgin solid cam, home ported heads, MTS 2.19/1.84", Potter/Probe shaft rockers, edel 2115, 4781 850. Switch-pitch TH400, 12" 1800/3200 Tri-Shield convertor, 4.30 gears. Best so far of 11.66, 114.8 mph and 1.59 sixty
GearDrive
C1
*
Posts: 14



« Reply #12 on: November 13, 2009, 07:09:31 AM »

Dave,

Thanks for the info.

What is a "somender groove"? I've never heard of that before. Is it in the combustion chamber? What is it's purpose?

I'm on a tight buget for this swap, $800-$1000.

What's the best rocker system for the $$$.
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dave brode
C5
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Posts: 1074


Best of 11.66, 113.96, 1.59 sixty


« Reply #13 on: November 13, 2009, 10:34:59 AM »

Dave,

Thanks for the info.

What is a "somender groove"? I've never heard of that before. Is it in the combustion chamber? What is it's purpose?

I'm on a tight buget for this swap, $800-$1000.

What's the best rocker system for the $$$.


GD,

Grooves: Search "grooves" here for several threads. Allow engine to make best power on lower octane, less fuel and less timing.

On that budget, the best rocker system is stock. LOL. With a slow ramp cam, you can run stock stuff, esp at the rpm you'll have on a tow engine. Beehive springs are a good thing with stock rockers, as they allow running less spring pressure. The comps 918s are pricey. You can use the cheaper yellow GM behives, but the boss on the heads needs to be cut a tad smaller to use them. .810" iirc. The beehives aren't a must, and there are options for straight taller than normal sb chev 1.250" springs. A slow ramp "tow" cam should not need more than 100-110 seat with straight spring imo. Fyi, I have the yellow GM beehives set at 95# seat on the engine with the .536" lift Howards cam. It's seen 5600 more than once [be mistake].    

Marty's $500-ish non adjustable shaft rollers look like a good deal. Potter may still sell a stud mount roller tipped setup.

There are cheaper adapted stamped buick rockers out there, but stockers in good shape would do for you imo.

Dave
« Last Edit: November 13, 2009, 10:43:55 AM by dave brode » Logged

3960 lb '71 C-10. 11.7-1 CR 514". PEP I beam rods floating MTS 18cc dish Probes, Elgin solid cam, home ported heads, MTS 2.19/1.84", Potter/Probe shaft rockers, edel 2115, 4781 850. Switch-pitch TH400, 12" 1800/3200 Tri-Shield convertor, 4.30 gears. Best so far of 11.66, 114.8 mph and 1.59 sixty
dave brode
C5
*****
Posts: 1074


Best of 11.66, 113.96, 1.59 sixty


« Reply #14 on: November 13, 2009, 10:38:18 AM »

http://cgi.ebay.com/ebaymotors/Z06-Corvette-LS6-valve-springs-spring-12499224-LS2-LS1_W0QQcmdZViewItemQQhashZitem2556ecd94eQQitemZ160372152654QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

They work with the same comp retainer [#787?] that is used on the comp 918 beehives.

search "beehives" here for threads

Dave
« Last Edit: November 13, 2009, 10:42:51 AM by dave brode » Logged

3960 lb '71 C-10. 11.7-1 CR 514". PEP I beam rods floating MTS 18cc dish Probes, Elgin solid cam, home ported heads, MTS 2.19/1.84", Potter/Probe shaft rockers, edel 2115, 4781 850. Switch-pitch TH400, 12" 1800/3200 Tri-Shield convertor, 4.30 gears. Best so far of 11.66, 114.8 mph and 1.59 sixty
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