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Search found 4038 matches

by Walter R. Malik
Sat Dec 07, 2019 10:26 am
Forum: Engine Tech
Topic: Desmodromic valve gear
Replies: 19
Views: 542

Re: Desmodromic valve gear

The torsion bars honda used in there 450 it was reving pretty high and the valve springs in there 350s but not what can be done today with valve springs and the lighter smaller 4 valves. First, IDK if Honda ever made a desmodromic valve train, but the torsion bar was just a long, straight spring. A...
by Walter R. Malik
Fri Dec 06, 2019 10:26 am
Forum: Engine Tech
Topic: Stroke a 396?
Replies: 32
Views: 962

Re: Stroke a 396?

Its just being used for sentimental reasons :D I am going to get all the numbers off the block pad and make sure its not for some rare find. and I will mock up something 1st to make sure the block doesn't have to be clearanced massive cause if so I will probably just sell the block. I might go for ...
by Walter R. Malik
Fri Dec 06, 2019 10:20 am
Forum: Engine Tech
Topic: Desmodromic valve gear
Replies: 19
Views: 542

Re: Desmodromic valve gear

As what Ducati motorcycle called their springless valvetrain...I have Ducatis and find it interesting, you can turn the cams by hand easily because there's no spring resistence..Well there is a light torsion spring to close the lash gap... It was designed when valve springs were not reliable at hig...
by Walter R. Malik
Wed Dec 04, 2019 6:27 pm
Forum: Engine Tech
Topic: Stroke a 396?
Replies: 32
Views: 962

Re: Stroke a 396?

Can I put a stroker crank in it reasonably? :shock: A 4.00" stroke crank or 4.250" stroke crank from the aftermarket with a 6.385" long aftermarket rod is a common thing with any big block Chevrolet, regardless of bore size. They easily fit in the blocks when using a steel connecting rod. Custom pi...
by Walter R. Malik
Mon Dec 02, 2019 5:55 pm
Forum: Engine Tech
Topic: Pressure recovery...am I understanding it correctly?
Replies: 3
Views: 406

Re: Pressure recovery...am I understanding it correctly?

Comparing 2 heads exhaust port flow numbers...my sbf Promaxx 9175’s vs my barely ported 601 305 heads. The Promaxx heads have a 1.60 undercut stem valve, a short perfectly straight port with a “textbook” short turn, a short length, and a square exit that is obviously bigger than the 601’s. The 601’...
by Walter R. Malik
Sun Dec 01, 2019 9:38 pm
Forum: Engine Tech
Topic: CID symmetrical port BBC heads
Replies: 4
Views: 309

Re: CID symmetrical port BBC heads

80iowaBu wrote:
Sun Dec 01, 2019 4:54 pm
Does anyone have any real world experience with these heads?
Good stuff but, not many intake manifold choices.

John who used to own CHI now owns CID and this is kind of a 351 Cleveland head design for a big block Chevrolet.
by Walter R. Malik
Fri Nov 29, 2019 10:45 am
Forum: Engine Tech
Topic: Education time....what were these used for?
Replies: 10
Views: 781

Re: Education time....what were these used for?

First time I have seen one of these, anyone care to educate on their usage pros/cons? https://www.ebay.com/itm/L-A-BILLET-3-760-SPLIT-PIN-SBC-CRANKSHAFT-chevy-drag-race-road-racing-sprint/333405793130?hash=item4da088ab6a:g:7G8AAOSwO0Vd1bd8 I remember an 80 degree V8 Indy Chevrolet but, I can't say ...
by Walter R. Malik
Fri Nov 29, 2019 12:07 am
Forum: Engine Tech
Topic: Education time....what were these used for?
Replies: 10
Views: 781

Re: Education time....what were these used for?

First time I have seen one of these, anyone care to educate on their usage pros/cons? https://www.ebay.com/itm/L-A-BILLET-3-760-SPLIT-PIN-SBC-CRANKSHAFT-chevy-drag-race-road-racing-sprint/333405793130?hash=item4da088ab6a:g:7G8AAOSwO0Vd1bd8 I remember an 80 degree V8 Indy Chevrolet but, I can't say ...
by Walter R. Malik
Wed Nov 27, 2019 9:35 am
Forum: Engine Tech
Topic: New distributor gear...no roll pin holes??
Replies: 22
Views: 891

Re: New distributor gear...no roll pin holes??

Thank you all for the info. Doesn’t seem like this should be too difficult. A couple of other questions. 1...this is a new stock replacement duraspark distributor. The roll pin that is in it isn’t the normal single thick walled split pin that I am familiar with. It looks like a really thin piece of...
by Walter R. Malik
Tue Nov 26, 2019 6:14 pm
Forum: Engine Tech
Topic: Getting the wrong intake to fit.
Replies: 1
Views: 321

Re: Getting the wrong intake to fit.

I have a BBC project this winter. Depending on certain developments, we may go with a 9.600 deck height block. In the event we go this direction, I will be scratching my head on the intake manifold fitment. I am suspecting milling .280” off the intake face will not leave me much left over for the b...
by Walter R. Malik
Mon Nov 25, 2019 9:55 am
Forum: Engine Tech
Topic: Hei ignition system questions.
Replies: 6
Views: 427

Re: Hei ignition system questions.

When running a decent amount of overlap and higher compression on a street engine, are there benefits to using the msd 6al system with tpi hei? Also how low of resistance plug wires can I run without having rf noise that causes problems with the radio. Basically I want the hottest ignition I can ge...
by Walter R. Malik
Sun Nov 24, 2019 9:52 am
Forum: Engine Tech
Topic: How to provide oiling to the piston pin in a forged piston?
Replies: 22
Views: 2119

Re: How to provide oiling to the piston pin in a forged piston?

On another thread, I was alerted by dwilliams that in the bad old days Venolia forged pistons were shipped with no provision for pin oiling. A very good head's up, as we've become so accustomed to pistons being good to go out of the box, that these NOS caught us not looking. They required pin fitti...
by Walter R. Malik
Sat Nov 23, 2019 4:28 pm
Forum: Engine Tech
Topic: What would you do if your motor was built like this?
Replies: 20
Views: 1481

Re: What would you do if your motor was built like this?

Got a buddy who crews on his nephews Sprint car team. This past season they struggled with their SBC not performing up to snuff. They took it to another builder and look what they found...ouch. I think that probably someone wanted this engine repaired in any way possible in order to make a race tha...
by Walter R. Malik
Sat Nov 23, 2019 11:10 am
Forum: Engine Tech
Topic: Piston pin end clearance?
Replies: 20
Views: 637

Re: Piston pin end clearance?

What do you say is a minimum and maximum pin to lock ring clearance ? Would it be the same for forged or cast? Would a larger bore need more or less clearance? Thanks Minimum clearance is determined by the pin length and wall thickness as to how long it retains its heat longer than the piston itsel...
by Walter R. Malik
Sat Nov 23, 2019 10:42 am
Forum: Engine Tech
Topic: New distributor gear...no roll pin holes??
Replies: 22
Views: 891

Re: New distributor gear...no roll pin holes??

Thank you all for the info. Doesn’t seem like this should be too difficult. A couple of other questions. 1...this is a new stock replacement duraspark distributor. The roll pin that is in it isn’t the normal single thick walled split pin that I am familiar with. It looks like a really thin piece of...