High Performance Big Block Cadillacs
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Author Topic: Coolant in Oil Sucks!  (Read 19278 times)
online170
C2
**
Posts: 58


« Reply #45 on: December 31, 2011, 10:43:28 PM »

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« Last Edit: August 29, 2017, 06:24:38 PM by online170 » Logged
~JM~
Shop Keeper
C5
*****
Posts: 1853


« Reply #46 on: January 01, 2012, 01:19:28 PM »

I remember several members melting a small block Chevy piston to fill that exhaust cross-over. Don't know if they used a cast or forged piston or if it matters. Usually they pre-heat the Head as much as possible on a wood burning stove or in an oven. They have melted the piston with a Coleman stove & a rosebud tip oxy/acetyline rig in an iron pan. Many others just remove the sharp edges on that exhaust cross-over & then leave it alone.

Keep up the good work. That Cadillac iron is hard to grind.
~JM~
Logged

PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
online170
C2
**
Posts: 58


« Reply #47 on: January 01, 2012, 08:54:06 PM »

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« Last Edit: August 29, 2017, 06:24:49 PM by online170 » Logged
dave brode
C5
*****
Posts: 1074


Best of 11.66, 113.96, 1.59 sixty


« Reply #48 on: January 01, 2012, 09:16:48 PM »


snip[

> Ive noticed alot of guys fill the ugly pot hole in the exh with aluminum. 2 Questions, wont it go molten?? 1200* to melt aluminum. and secondly, how do you do it? Something a welding shop can do?

Pics below of what I use. Pour into trough, fill it up until it runs out. I fill the dead hole in the intake side first. then, bolt a little plate over the intake side of the heat riser port, flip the head, pre-heat a bit more while heating the alum in skillet, and pour. I use whatever alum that I have. Usually, old cast pistons. I don't even clean them. You can skim the gook off before pouring. It takes a BIG rosebud tip. I've done a good number of heads over the years. It always stays put. I pre-heat the head until it's hot enough that you can't lay your hand on it.

--

> Ive read the threads "giving up on the short side radius", and the one talking extensively about the edelbrock mismatch angle. Also in there were some pretty crazy creative custom intakes, and one guy that went through ALOT of trouble raising the ports to get the right angle. I dont plan to get that crazy, but raising the roof 0.150 doesnt seem that hard to do. Wont that hurt the velocity in the port though? I dont want to mess around with filling the floor.

Imo, fwiw, with a slight raise, the mismatch on the floor is not going to hurt anything. [or on the p-rod side, I feel that mismatch there may actually help].

if you dink with an angle finder, you will see that the 1st inch or so of the head ports' roof is not even close to the approach angle of the edel. Raising it .150' or so will allow you to get the angles pretty close.

Dave


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« Last Edit: January 01, 2012, 09:21:24 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 #49 on: January 02, 2012, 12:41:12 PM »

...Is it possible to buy bigger valves from any parts store or is that purely an aftermarket thing? Im thinking if im doing a valve job, i may as well throw in some bigger valves if the price to do the machining is the same....

Many use a set of 2.11 & 1.77 Pontiac valves. Just make sure you have the correct stem length. Here is one place that I've heard has good prices on valves.
http://www.competitionproducts.com/Valves/departments/29/
http://www.competitionproducts.com/Pontiac-400_455-Stainless-Racing-Valves-11_32/products/211/
Of course any of our Vendors should have the correct length valves available. Be careful that your machine shop doesn't sink your valve seats too far into the head. That happened to me when I built my engine. As under-headed as our engines are, larger valves are very beneficial. If your camshaft lift is around .500" or less, you may want to consider a 30 degree seat on the intakes vs. the more traditional 45 degree angle. http://caddy500.com/index.php?topic=510.0

Thanks for taking the time to post up pics of your progress. It has been a while since we've had a good build thread to follow along with.

~JM~
« Last Edit: January 02, 2012, 12:54:46 PM by ~JM~ » Logged

PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
online170
C2
**
Posts: 58


« Reply #50 on: January 03, 2012, 09:04:58 AM »

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« Last Edit: August 29, 2017, 06:24:59 PM by online170 » Logged
~JM~
Shop Keeper
C5
*****
Posts: 1853


« Reply #51 on: January 03, 2012, 12:31:59 PM »

Good job on the Block prep. That was one of my favorite steps. Now is a good time to brush out the oil passages with a gun cleaning kit. I did that before & after the Block & Crank were cleaned at the machine shop. I found a lot of black residue inside the Crank passages that would've fouled my bearings on the first start.

~JM~
Logged

PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
online170
C2
**
Posts: 58


« Reply #52 on: January 03, 2012, 01:42:37 PM »

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« Last Edit: August 29, 2017, 06:25:09 PM by online170 » Logged
~JM~
Shop Keeper
C5
*****
Posts: 1853


« Reply #53 on: January 04, 2012, 10:56:58 AM »

Are you sure that you don't want to tackle the Short-block assembly by yourself? It's not that difficult other than degreeing the camshaft.

~JM~
Logged

PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
online170
C2
**
Posts: 58


« Reply #54 on: January 05, 2012, 08:43:29 AM »

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« Last Edit: August 29, 2017, 06:25:54 PM by online170 » Logged
~JM~
Shop Keeper
C5
*****
Posts: 1853


« Reply #55 on: January 05, 2012, 11:52:38 AM »

...I also dont have the equipment to measure anything...

Ah... Good reason to have someone else do the assembly. Do you have the chance to assist or observe? It really is satisfying looking at the Shortblock all assembled.

~JM~
Logged

PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
online170
C2
**
Posts: 58


« Reply #56 on: January 05, 2012, 12:33:47 PM »

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« Last Edit: August 29, 2017, 06:25:21 PM by online170 » Logged
online170
C2
**
Posts: 58


« Reply #57 on: January 17, 2012, 01:01:12 PM »

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« Last Edit: August 29, 2017, 06:25:34 PM by online170 » Logged
online170
C2
**
Posts: 58


« Reply #58 on: January 30, 2012, 12:10:37 PM »

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« Last Edit: August 29, 2017, 06:25:44 PM by online170 » Logged
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