Mechanical drawings /cyl head

[gordon]

Any of you guys have access to mechanical drawings showing the location of cyl head bolt/stud holes and alignment dowel holes ? Other machined dimensions (valve centers would help also) of the head would be nice but this will get me started.

 

[53 Studillac]

I do not. I have a Boogieman head intake gasket drawn but not actual head dims. Probably have to grab a head and go to measuring! Want to do your own rockers?

 

[gordon]

I have to do more corrective machine work to these heads. I am very disappointed in the quality control issues. I think most of it is due to the fact that the machine work on these heads is contracted out. Cad 500 most likely don't measure and check the work before shipping them out. I have almost 50 yrs. experience of race engine machining and building, and I learn something new everyday. When I see a problem I usually know what caused it right away. I will repair these and move forward. I do know of some one that might be interested in producing a rocker arm set up for this specific head. I will be talking with them in near future. On the other hand even with the disappointment I am glad these heads are produced .

 

[53 Studillac]

I saw where you had purchased Boogieman heads. I had lots of issues with mine and had hoped the problems had been worked out by now. Hate to hear the quality isn’t top notch. It’s difficult enough to build one of these engines.

 

[gordon]

Very challenging indeed. I already have addressed the intake port face issue with the heads, now I have to correct the dowel pin hole locations. They were not even close and way oversize. Looked like they were drilled using a broken drill bit in a drill press with bad spindle bearings. I will ream them, plug them , then drill and ream to correct size and location to fit standard block dowels. At least one head stud hole on each head needs to be spot faced. On a Cadillac head the angle of the intake port face is supposed to be 90* to the deck. Mine were off to were there was a .062" gap at the bottom . If some one where to bolt on an intake manifold they would have a massive vacuum leak and probably be sucking oil into port from lifter valley. I have seen this many times on manifold swaps. I have no desire to call and attempt to get warranty issues handled. The shipping and time involved even if they agreed to send me a set of correctly machined heads puts me off. Any how I am going to finish the corrections make notes and post on here for others that might use the info. When I was racing full time I won many races and several championships I never held back info or help to others . Many were customers of mine some were not. I made money from the shop not so very much from the racing prize money. When they won I won. I will shut up and go back to my corner now.

 

[Big Cadoo!]

Very challenging indeed. I already have addressed the intake port face issue with the heads, now I have to correct the dowel pin hole locations. They were not even close and way oversize. Looked like they were drilled using a broken drill bit in a drill press with bad spindle bearings. I will ream them, plug them , then drill and ream to correct size and location to fit standard block dowels. At least one head stud hole on each head needs to be spot faced. On a Cadillac head the angle of the intake port face is supposed to be 90* to the deck. Mine were off to were there was a .062" gap at the bottom . If some one where to bolt on an intake manifold they would have a massive vacuum leak and probably be sucking oil into port from lifter valley. I have seen this many times on manifold swaps. I have no desire to call and attempt to get warranty issues handled. The shipping and time involved even if they agreed to send me a set of correctly machined heads puts me off. Any how I am going to finish the corrections make notes and post on here for others that might use the info. When I was racing full time I won many races and several championships I never held back info or help to others . Many were customers of mine some were not. I made money from the shop not so very much from the racing prize money. When they won I won. I will shut up and go back to my corner now.

I have cadillac head blueprint. 18.670 from intake manifold dowel centerline to locating dowel hole at other end of head. Also 18.880 from ex port valve guide centerline at intake dowel end of head to same locating dowel hole. Distance between dowel locating holes is 20.359 to 20.361 I personally would measure a factory head for dimensions if I didn't have the blueprint.

 

[gordon]

Thank you , that helps

 

[48Austin]

Very disappointing to find out. Was going to cough for a set. But then to find out it may take a couple of G's to fix. Don't think so.

 

[gordon]

Really does not have to be that way if they would do more QC. I would also love to find for a reasonable price a set of the aluminum FR series heads. But they were priced to high for what you get. I really am not bashing the Boogieman heads just stating what I found wrong with mine that prevented me or anyother schmoe from just bolting them on and having a running engine. Mine would not set on the block due to the dowel holes. The intake port face was also a hair puller for the inexperienced . I really like these heads. There are some changes I would do different to them but nothing drastic. One thing that would benefit the person pushing lots of boost would be to fill the casting void underneath the intake port. Also add aluminum to the casting along the top of the intake port so the roof could be raised a radical amount. If I get a second set I will weld these areas up for some radical work not street stuff. Also the intake pushrod pinch area needs attention. Just my opinions. Press on Regardless. I will report on my progress in the coming months. This is my busy time of year at work. But I will report in.

 

[48Austin]

I wanted to buy a set and bolt them on. For the price they should be . But from what you're saying they are not.

 

[gordon]

I think they are sold with the idea of being nearly ready to bolt on ( I always do a disassemble and clean of anything I get) mine were not due to the issues I mentioned earlier. They are the only game in town . Maybe if these issues are mentioned to them at purchase time they can take care of them before shipment.

 

[48Austin]

But for the same price fully worked over iron heads. I don't have the means to do or know how to do the work myself.

 

[Big Cadoo!]

But for the same price fully worked over iron heads. I don't have the means to do or know how to do the work myself.

Hey 48 Austin. I have a recently built (lastyear) 4.400 bore x 4.420 stroke Hbeam 6.750 chrysler rod bearing rods 7/16 arp bolts. CadCompany forged pistons 10-1 compression 76cc heads 2.25in 1.8ex stainless vlvs. HowardsCams Springs for Mech roller cam 272in 276 ex .720 lift intake .680 lift ex.compcams endurex lifers Manton pushrods Setup for T&D rocker assembly. Grooved cam bearings. No T&D with engine. 8quart pan .875id pickup tube bushed lifter bores aluminum vlv covers with breathers. custom Twisted wedge A460 intake fabricated to fit Cad500. Dominator flange. HEI distributor/ wires. $5000.00 firm! You can use that SBC in the Austin to start it with!

 

[48Austin]

Would be very interested. "here it comes" BUT, finances right now, and what do I do with my blower and related parts? I know, would need bbc to start a blown Cad. Have 8:71, Boogieman intake, pullies, belts, Predator carbs. Waiting on hub adaptor and word on a mag. So half your engine is no good to ME. Not that it isn't good to someone else. Sounds like a DAMN good deal.

 

[48Austin]

Just your engine would make my teensy car scoot. "A LITTLE"

 

[Big Cadoo!]

I think they are sold with the idea of being nearly ready to bolt on ( I always do a disassemble and clean of anything I get) mine were not due to the issues I mentioned earlier. They are the only game in town . Maybe if these issues are mentioned to them at purchase time they can take care of them before shipment.

Hello Gordon. When the Potter rocker arm assembly arrived for my Boogieman cylinder heads I found out the the hold down studs didn't fasten the girdle section of the assembly to the cylinder head separately from the rocker shafts. On T&D rocker assembly for iron head cadillac cylinder heads there are 7/16 studs with 7/16-20 thread for a nut that holds down the girdle section to cylinder head at factory rocker locations. On the Potter assembly the 7/16 stud had one shoulder with a 3/8-24 threaded area to hold the rocker assembly as on unit. I determined that 3/8 material wasn't going to retain the rocker assembly to the cylinder head during use. I copied the T&D hold down method by buying the studs from T&D for the iron head. I also bought counterbore cutters from Travers Tool Company to facilitate maching the Potter girdles to install the 7/16-20 studs. You can get Travers catalog sent to you from their internet site. I'd have mentioned this sooner but only recently remembered it.

 

[gordon]

 

[gordon]

 

[gordon]

This top adapted to the boogieman manifold at top