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Search: Posts Made By: Jim Brierley
Forum: Model A (1928-31) Yesterday, 12:11 PM
Replies: 6
Views: 216
Posted By Jim Brierley
Re: How to check a Model B Cam?

As John says, I do regrinds. I suggest 1.556" as a minimum bearing size, the center brg. is the most likely to wear. B cams came in .305", 319" and 339" lifts. Some were copper plated, some not. ...
Forum: Model A (1928-31) 09-21-2019, 09:47 AM
Replies: 7
Views: 499
Posted By Jim Brierley
Re: How many ccs??

Good point redmodelt! Yes, piston pop-up means fewer cc's of combustion chamber volume. It's normally about .015" but should be measured. At least .040" clearance should be maintained between the...
Forum: Model A (1928-31) 09-20-2019, 11:32 AM
Replies: 7
Views: 499
Posted By Jim Brierley
Re: How many ccs??

My chart shows 7.5:1 for 125 cc's, you'll need to add in the gasket volume, I've seen 16.877cc @ .050” thickness and 20.253cc @ .060”. Marco Tahtaras on Ford Barn says 17.474cc. I’ve been using...
Forum: Model A (1928-31) 09-20-2019, 11:23 AM
Replies: 11
Views: 386
Posted By Jim Brierley
Re: front spring question for a 30 hot rod

The big block is heavy, you'll probably need another leaf, use a long one for good results.
Forum: Model A (1928-31) 09-20-2019, 11:19 AM
Replies: 11
Views: 405
Posted By Jim Brierley
Re: Full advance from 28/29

I agree with ryanheacox.
Forum: Model A (1928-31) 09-19-2019, 10:38 AM
Replies: 15
Views: 625
Posted By Jim Brierley
Re: any advantages to downdraft carb & header..??

The carb doesn't have to be a downdraft, just bigger to pass more air. Changing cams is a lot more work, do the carb and compression first, you will be pleases. This coming from a guy the grinds...
Forum: Model A (1928-31) 09-18-2019, 10:42 AM
Replies: 7
Views: 499
Posted By Jim Brierley
Re: How many ccs??

I have a chart in my book, done by Dave Barker some years ago, showing compression ratios using different bore sizes. It shows 155 for standard bore, 6:1 head. And it shows about 240 cc's for 4.2:1.
Forum: Model A (1928-31) 09-18-2019, 10:30 AM
Replies: 15
Views: 625
Posted By Jim Brierley
Re: any advantages to downdraft carb & header..??

When I bought my tudor many years ago, it had a stock 'C' engine with A manifolds. I ran it at a hill climb in Auburn, CA. to get a "base" time. At a second hill climb 6 months later I had changed...
Forum: Model A (1928-31) 09-18-2019, 10:14 AM
Replies: 42
Views: 10,290
Posted By Jim Brierley
Re: Turlock machine

And the tabs on inserts are not there to prevent brg rotation, they merely locate the brg.
Forum: Model A (1928-31) 09-17-2019, 10:49 AM
Replies: 12
Views: 512
Posted By Jim Brierley
Re: Timing gear/cam noise?

.004" is more than enough, .002" is all that is needed because the only consideration is expansion on about 1.5" of steel cam.
Forum: Model A (1928-31) 09-17-2019, 10:39 AM
Replies: 14
Views: 365
Posted By Jim Brierley
Forum: Model A (1928-31) 09-16-2019, 11:17 AM
Replies: 12
Views: 512
Posted By Jim Brierley
Re: Timing gear/cam noise?

I've never had that problem, but cam lobes are ground on a taper to induce tappet rotation. The timing gears and the dist/oil pump gear produce thrust towards the rear. That's the theory anyway but...
Forum: Model A (1928-31) 09-15-2019, 11:18 AM
Replies: 103
Views: 3,617
Posted By Jim Brierley
Re: babbit tolerance? .000?

Too tight pistons will seize, and scar pistons and bore, so easily seen. Tight rings might do the same but am not sure. There are 2 guys that do babbitt near me, with a good reputation. I've had...
Forum: Model A (1928-31) 09-13-2019, 12:28 PM
Replies: 52
Views: 2,577
Posted By Jim Brierley
Re: Marvel's Mystery Oil

Originally Posted by History
I absolutely love California, it is a beautiful place where you could snow ski in the morning and surf in the afternoon. The place is on my mind all the time,...
Forum: Model A (1928-31) 09-13-2019, 12:12 PM
Replies: 103
Views: 3,617
Posted By Jim Brierley
Re: babbit tolerance? .000?

Thanks Herm, and Mike, very interesting!
Forum: Model A (1928-31) 09-12-2019, 12:05 PM
Replies: 3
Views: 357
Posted By Jim Brierley
Re: Insert con rod suggestions

I agree with Railcarmover! Until my last Bonneville engine I always used stock B rods, mostly with babbitt. Dipper oiling is good to 4,000 RPM's or so. I've always run C cranks, because I have...
Forum: Model A (1928-31) 09-12-2019, 11:48 AM
Replies: 103
Views: 3,617
Posted By Jim Brierley
Re: babbit tolerance? .000?

Railcarmover, I'm not sure the rear bearing would run dry, just don't want to chance it. On my insert engine I run a 1-piece Burtz seal, and it stays dry. I also run a babbitted mains engine on the...
Forum: Model A (1928-31) 09-11-2019, 11:43 AM
Replies: 19
Views: 725
Posted By Jim Brierley
Re: Change

I agree with WHN. Hindsight is wonderful, but keep in mind where the A came from. We must walk before we can run!
Forum: Model A (1928-31) 09-11-2019, 11:37 AM
Replies: 9
Views: 541
Posted By Jim Brierley
Re: Jumper wire

I'm definitely not an electrician, but always thought the stock ignition was set to ground the points, thru the armored cable, when ignition key is turned on, and there was power to the points from...
Forum: Model A (1928-31) 09-11-2019, 11:27 AM
Replies: 103
Views: 3,617
Posted By Jim Brierley
Re: babbit tolerance? .000?

I set all mains at .0025" on my inserted race engines, with a groove to feed the rear at 2 different spots. First I ever heard Patrick L's story about extra clearance helping rear flange breakage!
Forum: Model A (1928-31) 09-10-2019, 11:45 AM
Replies: 3
Views: 304
Posted By Jim Brierley
Re: Hydralic conversion

There was a guy on Facebook, banger hot rods, quite awhile ago advertising them, might be worth a try?...
Forum: Model A (1928-31) 09-10-2019, 11:26 AM
Replies: 14
Views: 585
Posted By Jim Brierley
Re: Electrolock question

Yes, the pipe only acts as a guide. The wire would connect to the plate as the standard cable does, some modification will be needed at the wire end.
Forum: Model A (1928-31) 09-10-2019, 11:13 AM
Replies: 5
Views: 305
Posted By Jim Brierley
Re: water pump ID

To my knowledge, the V8 pumps used a carbon seal, far superior to any lip seal, may be worth looking into?
Forum: Model A (1928-31) 09-09-2019, 12:08 PM
Replies: 3
Views: 385
Posted By Jim Brierley
Re: Radial Tires 16 inch Kelsey Hayes

Because Kelsey's spokes go thru the rim, they must be sealed in order to run tubeless tires. A dab of silicone on each spoke, covered by a wrap of tape is all that is needed. I run 215-70-16R tires...
Forum: Model A (1928-31) 09-09-2019, 11:55 AM
Replies: 22
Views: 1,162
Posted By Jim Brierley
Re: 3.27 ring and pinion, anyone using one ?

I tried 3.27's in my speedster a few years ago. Highway cruising was OK but not as high as I wanted, takeoff from stop was not good, using a 28 tooth V8 trans, on hill climbs it was terrible. With...
Showing results 1 to 25 of 500

 
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