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Search: Posts Made By: DaveMcLain
Forum: Engine Tech 03-24-2015, 07:19 PM
Replies: 18
Views: 711
Posted By DaveMcLain
Your math is incorrect .110 X 2 does NOT equal...

Your math is incorrect .110 X 2 does NOT equal .220. A .110 hole equals 0.0095 sq inches so two equal .019 a single .220 hole equals 0.0380 or roughly FOUR TIMES the area of a single needle. That's...
Forum: Engine Tech 03-24-2015, 12:24 PM
Replies: 18
Views: 711
Posted By DaveMcLain
Most of the time around .110 or less with...

Most of the time around .110 or less with gasoline. I think -6 is plenty big.
Forum: Engine Tech 03-20-2015, 08:02 AM
Replies: 6
Views: 208
Posted By DaveMcLain
The Harley switches that I used were set at 3 and...

The Harley switches that I used were set at 3 and 5 inches of Hg but there are quite a few different ones. I think the idea of them is that they allow the ignition timing to be altered...
Forum: Engine Tech 03-19-2015, 08:52 PM
Replies: 6
Views: 208
Posted By DaveMcLain
In the past I've used a vacuum switch from a...

In the past I've used a vacuum switch from a Harley Sportster motorcycle for similar stuff and it worked great. They are preset at various vacuum levels but some can be adjusted. It can be used to...
Forum: Engine Tech 03-19-2015, 12:36 PM
Replies: 9
Views: 357
Posted By DaveMcLain
The valve lengths used in the D3 heads are...

The valve lengths used in the D3 heads are shorter than valves used in the older DOVE-C and similar heads. Maybe the heads were rebuilt using those valves and now the pushrod has to be much shorter...
Forum: Engine Tech 03-18-2015, 07:34 AM
Replies: 6
Views: 312
Posted By DaveMcLain
I've balanced a crank for a customer who gave me...

I've balanced a crank for a customer who gave me a bob weight and it was no problem at all. It was a replacement crank for an engine that had been built years earlier and he had all of the bob...
Forum: Engine Tech 03-17-2015, 01:04 PM
Replies: 9
Views: 400
Posted By DaveMcLain
I always use the stock Melling shaft and pump is...

I always use the stock Melling shaft and pump is it really a problem?
Forum: Engine Tech 03-16-2015, 06:25 PM
Replies: 16
Views: 705
Posted By DaveMcLain
Pump pickup all the way down against the bottom...

Pump pickup all the way down against the bottom of the oil pan?
Forum: Engine Tech 03-15-2015, 05:53 PM
Replies: 20
Views: 1,012
Posted By DaveMcLain
I have personally seen stock square shoulder rods...

I have personally seen stock square shoulder rods with a set of KB137 pistons go to 6500rpm a lot in a 460 making about 500 horsepower or so without failure or having to change the bearings. Your...
Forum: Engine Tech 03-14-2015, 06:23 PM
Replies: 13
Views: 2,139
Posted By DaveMcLain
It is down right now but I'll get it back up...

It is down right now but I'll get it back up again I just need to get some hosting.
Forum: Engine Tech 03-12-2015, 02:26 PM
Replies: 29
Views: 7,633
Posted By DaveMcLain
Stuff that should always be kept though are...

Stuff that should always be kept though are distributor hold downs, pan and valve cover bolts, fuel pump eccentrics and, timing covers, timing cover and head bolts.
Forum: Engine Tech 03-07-2015, 09:53 AM
Replies: 17
Views: 624
Posted By DaveMcLain
With Holley carburetors the throttle shafts used...

With Holley carburetors the throttle shafts used to be plated(look sort of green usually) but some time or another they quit doing that and the shafts are now plain. The coating added very slightly...
Forum: Engine Tech 03-03-2015, 09:42 AM
Replies: 21
Views: 1,080
Posted By DaveMcLain
Ford had aluminum heads on the 221 Flathead V8 in...

Ford had aluminum heads on the 221 Flathead V8 in 1932.

My grandpa who was a service manager at a Ford dealership for 40 years told me that they even had a special tool to remove them if they...
Forum: Engine Tech 03-03-2015, 09:17 AM
Replies: 16
Views: 820
Posted By DaveMcLain
ANY water cooled exhaust is a power killer and I...

ANY water cooled exhaust is a power killer and I think its just part of a boat engine build in that you try to build it so that it doesn't hurt too terribly bad. I did some dyno tests a few years...
Forum: Engine Tech 03-02-2015, 06:45 AM
Replies: 22
Views: 570
Posted By DaveMcLain
Hey wait a minute don't most 460 engines use the...

Hey wait a minute don't most 460 engines use the same(smaller) pilot as is used by the small block engines? How could that cause this problem even if he happened to have to older larger style 460...
Forum: Engine Tech 03-01-2015, 01:07 PM
Replies: 22
Views: 570
Posted By DaveMcLain
The same starter from the 400 will work just fine...

The same starter from the 400 will work just fine on the 460 but remember that the plane of the flange where the starter bolts on is supposed to be on the same plane as the back of the block. If you...
Forum: Engine Tech 02-27-2015, 10:01 AM
Replies: 12
Views: 744
Posted By DaveMcLain
I had an engine one time where it had a burnt...

I had an engine one time where it had a burnt intake valve yet another cylinder was the one that had the miss! I think I would do a compression or leakage test on all of the cylinders just to see if...
Forum: Engine Tech 02-24-2015, 09:46 AM
Replies: 11
Views: 580
Posted By DaveMcLain
Are you running an MSD ignition? I've seen those...

Are you running an MSD ignition? I've seen those do just the opposite when the secondary was inducing signal into the pickup wires. They will fire nearly continuously at low speed and "shoot ducks"...
Forum: Engine Tech 02-21-2015, 10:43 PM
Replies: 19
Views: 782
Posted By DaveMcLain
How would that make any sense what so ever? If...

How would that make any sense what so ever? If you picked up 300 rpm there was probably something wrong with your 750.
Forum: Engine Tech 02-18-2015, 06:40 PM
Replies: 4
Views: 103
Posted By DaveMcLain
Try getting somebody to hit on the side of the...

Try getting somebody to hit on the side of the starter motor with a hard object while you are holding the key in the crank position.
Forum: Engine Tech 02-17-2015, 12:27 PM
Replies: 19
Views: 782
Posted By DaveMcLain
Don't confuse a Carter WCFB with the Rochester. ...

Don't confuse a Carter WCFB with the Rochester. The AFB is not a Rochester produced carburetor they were made by Carter Carburetor. It is not a '50's design like the 4150 Holley which replaced the...
Forum: Engine Tech 02-17-2015, 11:44 AM
Replies: 19
Views: 782
Posted By DaveMcLain
The Holley carburetors are always somewhat larger...

The Holley carburetors are always somewhat larger than the Carter style carburetor of the same CFM rating. The 750 cfm Carter is sort of like the 850 Holley in that in order to get greater air flow...
Forum: Engine Tech 02-17-2015, 06:36 AM
Replies: 19
Views: 782
Posted By DaveMcLain
The SCJ and the CJ manifolds are the same and use...

The SCJ and the CJ manifolds are the same and use CJ size ports despite the mismatch with the D3VE heads when used on a boat. The difference is that the SCJ piece is machined to fit a Holley...
Forum: Engine Tech 02-16-2015, 06:46 PM
Replies: 19
Views: 782
Posted By DaveMcLain
This guys engine while it was a 454 Chevy it...

This guys engine while it was a 454 Chevy it wasn't all that much different than what you're doing. It would make 500 horsepower at 5000rpm using a set of oval port heads with mild port work,...
Forum: Engine Tech 02-16-2015, 03:30 AM
Replies: 19
Views: 782
Posted By DaveMcLain
I would avoid an 850 too. Several years ago a...

I would avoid an 850 too. Several years ago a customer of mine was using one on his 454 Chevy in a jet boat. When I had the engine on the dyno it was amazing how much load and rpm it could pull yet...
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