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Search: Posts Made By: DaveMcLain
Forum: Engine Tech 04-22-2015, 06:53 AM
Replies: 28
Views: 1,147
Posted By DaveMcLain
If a 4.500 stroke cast crank will last...

If a 4.500 stroke cast crank will last indefinitely in the application then a forged piece is a total waste of money unless it makes it easier to balance by enough to offset that cost. Overkill is...
Forum: Engine Tech 04-21-2015, 06:38 AM
Replies: 28
Views: 1,147
Posted By DaveMcLain
Another place where I would spend money more...

Another place where I would spend money more wisely would be on the rods. I would recommend using the Scat 7/16 bolt I beam rods and save a few bucks vs the H beam design.
Forum: Engine Tech 04-19-2015, 08:29 PM
Replies: 11
Views: 356
Posted By DaveMcLain
I don't think that'll cause any problem at all. ...

I don't think that'll cause any problem at all. What does it measure if you use two feeler gauges one on each side of the rod pair?
Forum: Engine Tech 04-14-2015, 07:03 PM
Replies: 58
Views: 2,869
Posted By DaveMcLain
I'm not much of a rule follower because leaving a...

I'm not much of a rule follower because leaving a bunch of grease in the bearing is a bad idea.
Forum: Engine Tech 04-14-2015, 01:12 PM
Replies: 58
Views: 2,869
Posted By DaveMcLain
I think this is totally wrong. I always...

I think this is totally wrong.

I always take a lot of time to remove the grease and then soak them in 10W-30 before installation. I think that the grease can cause lubrication problems because...
Forum: Engine Tech 04-13-2015, 07:13 AM
Replies: 6
Views: 457
Posted By DaveMcLain
There are lots of places that can make noise in...

There are lots of places that can make noise in the valve train: interference between the pushrod and the bottom of the guide plate slot, hole in the head, and retainer to the top of the guide. ...
Forum: Engine Tech 04-11-2015, 07:17 PM
Replies: 58
Views: 2,869
Posted By DaveMcLain
I think that Nascar "Cup" has always been on flat...

I think that Nascar "Cup" has always been on flat tappets until this season. I wonder if you're thinking of the .875 max lifter diameter when mushroom cams became illegal I think that happened in...
Forum: Engine Tech 04-08-2015, 11:00 AM
Replies: 5
Views: 206
Posted By DaveMcLain
I've seen one of those on a 1969 429 engine. In...

I've seen one of those on a 1969 429 engine. In that case there were no bolt on pulleys. It used the older style water pump and all the accessories were "shorter". The snout spacer was different I...
Forum: Engine Tech 04-07-2015, 10:52 AM
Replies: 24
Views: 972
Posted By DaveMcLain
That's what I would do; pull the covers and have...

That's what I would do; pull the covers and have a look.
Forum: Engine Tech 04-07-2015, 09:26 AM
Replies: 24
Views: 972
Posted By DaveMcLain
I'd be looking for a crossed wire or a cracked...

I'd be looking for a crossed wire or a cracked plug both of which can happen easily when you change the plugs. Or it has a flat cam on a cylinder and you changed the plug. Before the plug was...
Forum: Engine Tech 04-07-2015, 09:21 AM
Replies: 7
Views: 315
Posted By DaveMcLain
That's certainly what I've seen to be true. ...

That's certainly what I've seen to be true. Another tip when using a glasspack, Magnaflow or similar absorber type of muffler is that the closer you can put it to the end of the pipe the more...
Forum: Engine Tech 04-06-2015, 04:07 PM
Replies: 58
Views: 2,869
Posted By DaveMcLain
I think Jon Reed was behind that R&D effort and...

I think Jon Reed was behind that R&D effort and it didn't work out so well at the time.
Forum: Engine Build Archive 04-06-2015, 09:21 AM
Replies: 5
Views: 746
Posted By DaveMcLain
Pistons are the Mahle BBF350390I38 with a 38cc...

Pistons are the Mahle BBF350390I38 with a 38cc dish, 1.5, 1.5 3mm ring package and a 1.350 compression height. This gave a compression ratio of approximately 9.75:1

The Torker 2 was used...
Forum: Engine Build Archive 04-05-2015, 02:30 PM
Replies: 5
Views: 746
Posted By DaveMcLain
545 Dove Head 4X4 Build

I was just doing some dyno testing on a 545 build that I did for a customer who plans to use the engine in a four wheel drive truck for trail riding and some playing in the mud.

The build...
Forum: Engine Tech 04-03-2015, 12:57 PM
Replies: 14
Views: 858
Posted By DaveMcLain
If you can get a crossover pipe in there...

If you can get a crossover pipe in there somewhere before the mufflers and tail pipes it'll help even if you can't go to larger tail pipes.
Forum: Engine Tech 04-02-2015, 07:33 PM
Replies: 8
Views: 413
Posted By DaveMcLain
3/8th's pipe.

3/8th's pipe.
Forum: Engine Tech 04-01-2015, 06:40 AM
Replies: 3
Views: 247
Posted By DaveMcLain
The cam isn't really the problem and it's the...

The cam isn't really the problem and it's the main oil galley that was moved not the cam position in the later blocks.
Forum: Engine Tech 03-28-2015, 08:14 PM
Replies: 14
Views: 664
Posted By DaveMcLain
I wonder how hard they would be to re-pop on a...

I wonder how hard they would be to re-pop on a limited production basis?
Forum: Engine Tech 03-24-2015, 07:19 PM
Replies: 18
Views: 912
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: 912
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: 240
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: 240
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: 398
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: 334
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: 443
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?
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