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Search found 1069 matches

by Geoff2
Fri Dec 06, 2019 3:18 am
Forum: Engine Tech
Topic: Nitrided cams
Replies: 17
Views: 616

Re: Nitrided cams

I recently fitted a Comp FT cam that was nitrided, no bend in it. My understanding is that Comp uses Plasma nitriding which does not heat up the core as much as gas nitriding, which can & does cause bending because of the high temps used.
by Geoff2
Sun Dec 01, 2019 3:38 am
Forum: Engine Tech
Topic: -0.015" Big Block Timing Chain
Replies: 61
Views: 3734

Re: -0.015" Big Block Timing Chain

I have a new Rolon chain I am giving away.....for free! Has Rolon on side of the chain, India on other side...
by Geoff2
Sun Dec 01, 2019 3:21 am
Forum: Engine Tech
Topic: Weld or putty
Replies: 12
Views: 608

Re: Weld or putty

If the pin hole is into the coolant jacket, just use one of the myriad of coolant 'leak fixers'. Why risk welding, or epoxy burning up.
by Geoff2
Sat Nov 30, 2019 3:36 am
Forum: Engine Tech
Topic: curious 1960s cam tech
Replies: 14
Views: 1017

Re: curious 1960s cam tech

And the Vari-Cam adv/ret cam sprocket....
by Geoff2
Sat Nov 30, 2019 3:25 am
Forum: Engine Tech
Topic: 5/16" valve stems on intake lash changing?
Replies: 13
Views: 589

Re: 5/16" valve stems on intake lash changing?

Are the valves 'stretching' when hot at the stem/head interface? Less support & rigidity there because of the thinner stem.
by Geoff2
Sat Nov 30, 2019 3:21 am
Forum: Engine Tech
Topic: Single 44 idf weber on chevy inline six
Replies: 36
Views: 720

Re: Single 44 idf weber on chevy inline six

I doubt you can get 28mm chokes for the 44 IDF. 32 is the smallest in the W catalog. 28mm in a 44 bore is going to hurt pressure recovery. There is a good reason that all choke style carbs have their choke [ main venturi ] sized within a certain range of bore sizes. Also agree with Harry that the by...
by Geoff2
Fri Nov 29, 2019 2:48 am
Forum: Engine Tech
Topic: Single 44 idf weber on chevy inline six
Replies: 36
Views: 720

Re: Single 44 idf weber on chevy inline six

36mm chokes in a 44 mm bore sound about right. 28mm too small, better in a 40mm bore.
by Geoff2
Thu Nov 21, 2019 2:56 am
Forum: Engine Tech
Topic: Spring locator for PAC-1218X spring
Replies: 13
Views: 290

Re: Spring locator for PAC-1218X spring

Correct locator is CompCams #4705.
by Geoff2
Wed Nov 20, 2019 3:03 am
Forum: Engine Tech
Topic: Rod side clearance oil squirting?
Replies: 45
Views: 1182

Re: Rod side clearance oil squirting?

I have been grinding three per side, for decades.
by Geoff2
Thu Nov 14, 2019 3:06 am
Forum: Engine Tech
Topic: Jesel BUSHING lifters!!
Replies: 36
Views: 1808

Re: Jesel BUSHING lifters!!

Jesel finally got the message: the customer is always right!
by Geoff2
Wed Nov 13, 2019 4:03 am
Forum: Engine Tech
Topic: BBC Rocker Studs
Replies: 16
Views: 848

Re: BBC Rocker Studs

Get David Vizard's BBC book. He test various rockers for lift. Large lift variations between brands & types of rockers.
by Geoff2
Sun Nov 10, 2019 3:35 am
Forum: Engine Tech
Topic: Camshaft RPM range?
Replies: 14
Views: 1031

Re: Camshaft RPM range?

Engine capacity affects rpm range. Smaller engine will rpm higher than a larger engine,with the same cam.
by Geoff2
Sat Nov 09, 2019 3:21 am
Forum: Engine Tech
Topic: What's with these goofy SBC rocker arms?
Replies: 21
Views: 1199

Re: What's with these goofy SBC rocker arms?

Maybe they use adjustable pushrods to allow for adjustment?
by Geoff2
Thu Nov 07, 2019 4:28 am
Forum: Engine Tech
Topic: Single 44 idf weber on chevy inline six
Replies: 36
Views: 720

Re: Single 44 idf weber on chevy inline six

Main jet will probably need to be larger because the carb is feeding multiple cylinders. For more reliable fuel level control, you might want to switch to Viton n/seats, rather than the steel ones supplied by Weber. I believe RaceTep in Calif sell them. You should probably get a larger orifice size ...
by Geoff2
Wed Nov 06, 2019 3:49 am
Forum: Engine Tech
Topic: windage tray
Replies: 80
Views: 6085

Re: windage tray

Pontiac used a wrap around windage tray on their performance V8 engines, starting in 1965.