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Search: Posts Made By: DaveMcLain
Forum: Engine Tech 01-30-2015, 09:17 PM
Replies: 3
Views: 231
Posted By DaveMcLain
The Blue Thunder "B" head has a real Big Chevy...

The Blue Thunder "B" head has a real Big Chevy exhaust pattern in that it is actually on a Big Chevy bore spacing. If you look closely at the head you can see that the one on the left comes straight...
Forum: Engine Tech 01-29-2015, 09:39 AM
Replies: 20
Views: 887
Posted By DaveMcLain
I would assume that the factory iron intake...

I would assume that the factory iron intake manifold would probably be the greatest hindrance to power but with that said making 500 should be very easy.
Forum: Engine Tech 01-28-2015, 09:41 AM
Replies: 7
Views: 370
Posted By DaveMcLain
I would like to do your build but right now our...

I would like to do your build but right now our shop is so overloaded I'm way behind and I can't really take on any new projects right now. With that said another guy who might be interested would...
Forum: Engine Tech 01-26-2015, 07:45 AM
Replies: 5
Views: 219
Posted By DaveMcLain
And if your current cam and lifters are good come...

And if your current cam and lifters are good come up with a way to make sure that the lifters are kept in order so that they can be run again on the same lobe that they ran on before if you want to...
Forum: Engine Tech 01-24-2015, 10:22 AM
Replies: 2
Views: 181
Posted By DaveMcLain
I think you can dust them off with a bit of emery...

I think you can dust them off with a bit of emery and they will be fine.
Forum: Engine Tech 01-19-2015, 02:08 PM
Replies: 48
Views: 1,654
Posted By DaveMcLain
Here are a few pictures of the Danny Bee, the...

Here are a few pictures of the Danny Bee, the belt adjuster and the cam driven fuel pump "thingy"..

http://i40.photobucket.com/albums/e218/DaveMcLain/WP_20150119_004_zpsf24c9c33.jpg

...
Forum: Engine Tech 01-17-2015, 06:28 PM
Replies: 48
Views: 1,654
Posted By DaveMcLain
That belt tensioner is home made from a piece of...

That belt tensioner is home made from a piece of 1/2 inch aluminum with a slot milled into it and its about the same as the ones that the Bigfoot guys use . On the monster truck the engine is...
Forum: Engine Tech 01-17-2015, 01:55 PM
Replies: 48
Views: 1,654
Posted By DaveMcLain
I wouldn't build it high compression I would...

I wouldn't build it high compression I would shoot for about 11.5:1 or so it'll work fine and be easy to tune. I have not used the 18 bolt heads but it certainly can't hurt. After years of fooling...
Forum: Engine Tech 01-17-2015, 10:14 AM
Replies: 48
Views: 1,654
Posted By DaveMcLain
That is cool about the adapters and it sounds...

That is cool about the adapters and it sounds like a good idea to make them become part of the head. Using the CJ gaskets from Cometic which are thin and very tough would probably be cool. On the...
Forum: Engine Tech 01-16-2015, 03:40 PM
Replies: 48
Views: 1,654
Posted By DaveMcLain
I wonder what the adapters would be like to keep...

I wonder what the adapters would be like to keep tight?

We ran a production block(DOVE-A filled with Blue Thunder steel caps 557) for several years and ended up making it become the back up...
Forum: Engine Tech 01-16-2015, 11:09 AM
Replies: 48
Views: 1,654
Posted By DaveMcLain
We've been running an engine with the Blue...

We've been running an engine with the Blue Thunder "B" heads since 2001 and they have been great. I've probably valve jobbed them 8 or 9 times but they never need much work. I've changed the intake...
Forum: Engine Tech 01-15-2015, 10:05 AM
Replies: 48
Views: 1,654
Posted By DaveMcLain
A mild blown alcohol engine will make those...

A mild blown alcohol engine will make those numbers easily and at moderate RPM with great reliability.
Forum: Engine Tech 01-06-2015, 12:20 PM
Replies: 31
Views: 1,528
Posted By DaveMcLain
There are probably many times when shrouding...

There are probably many times when shrouding would not exist to any great degree. And also take a look at the RPM level of that chart. I bet you'll find that those difference diminish to...
Forum: Engine Tech 01-06-2015, 07:37 AM
Replies: 31
Views: 1,528
Posted By DaveMcLain
Both a long stroke small bore and large bore...

Both a long stroke small bore and large bore short stroke engine of the same displacement both sweep the cylinder at rates that are absolutely identical, change of volume per degree as long as the...
Forum: Engine Tech 01-05-2015, 07:18 PM
Replies: 31
Views: 1,528
Posted By DaveMcLain
The reason there is no advantage to the long...

The reason there is no advantage to the long stroke engine is simply because for the same displacement the piston has less area. While the long stroke does give it more leverage the piston produces...
Forum: Engine Tech 01-05-2015, 05:21 PM
Replies: 31
Views: 1,528
Posted By DaveMcLain
Sorry to tell you this but a long stroke engine...

Sorry to tell you this but a long stroke engine has ZERO torque advantage over a large bore engine of the same displacement.....
Forum: Engine Tech 01-04-2015, 11:01 AM
Replies: 5
Views: 286
Posted By DaveMcLain
Monster trucks do that engine shut off using the...

Monster trucks do that engine shut off using the ignition a lot because before each run they have to test the remote radio shut off system. I've never seen it be a problem and the engine starts...
Forum: Engine Tech 01-04-2015, 09:45 AM
Replies: 7
Views: 387
Posted By DaveMcLain
Right. It is just not easy to be accurate when...

Right. It is just not easy to be accurate when checking duration from very low valve lifts using a dial indicator because the velocity of the cam follower is so low per degree at those low lifts. ...
Forum: Engine Tech 12-31-2014, 09:41 AM
Replies: 26
Views: 787
Posted By DaveMcLain
", and every time I've replaced a VS carb with a...

", and every time I've replaced a VS carb with a DP on the dyno, it's been an instant 25HP. Dyno racing aside, I really just enjoy the predictable response and simplicity of the DP.


Only because...
Forum: Engine Tech 12-30-2014, 05:15 PM
Replies: 26
Views: 787
Posted By DaveMcLain
There were some very old Dominators that had a...

There were some very old Dominators that had a manual choke and there is no performance penalty from running a good vacuum secondary when compared to a double pumper.
Forum: Engine Tech 12-29-2014, 04:27 PM
Replies: 24
Views: 1,481
Posted By DaveMcLain
The new ones are supposed to be a different,...

The new ones are supposed to be a different, superior, higher quality piece but I don't know anybody who has used them yet....
Forum: Engine Tech 12-29-2014, 01:29 PM
Replies: 24
Views: 1,481
Posted By DaveMcLain
Check out this link to a thread on here with some...

Check out this link to a thread on here with some more information:

http://www.460ford.com/forum/showthread.php?t=194842&page=2
Forum: Engine Tech 12-29-2014, 12:48 PM
Replies: 24
Views: 1,481
Posted By DaveMcLain
Show a picture of the cutout above the wheel I...

Show a picture of the cutout above the wheel I bet that relief is getting up and intersecting the oil galley which causes it to dump oil pressure. Newer Comp Cams lifters are now machined...
Forum: Engine Tech 12-28-2014, 06:28 PM
Replies: 22
Views: 1,333
Posted By DaveMcLain
A lot of catalog cams are intended to be a...

A lot of catalog cams are intended to be a compromise because most enthusiasts tend to use a cam with too much duration for the job. They are normally ground with a lobe separation that's wider than...
Forum: Engine Tech 12-23-2014, 07:24 PM
Replies: 16
Views: 700
Posted By DaveMcLain
You forget that when these engines were...

You forget that when these engines were originally developed the gasoline formulations were WAY different and lots more tolerant of the low pressure world of carburetion and thus the heat from an...
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