Search found 1137 matches

by BCjohnny
Fri Mar 22, 2024 2:25 am
Forum: Engine Tech
Topic: epoxy to repair damaged jet tower on motorcycle carbs
Replies: 6
Views: 298

Re: epoxy to repair damaged jet tower on motorcycle carbs

Generally speaking ......

It's the alcohol constituent of 'gas', if present, that tends to attack the various epoxies, so just be aware of that

And you can't really 'barrier' coat it, as you might say in an intake port, to protect it in a carb as it's continually immersed in the fuel
by BCjohnny
Thu Mar 21, 2024 4:46 am
Forum: Engine Tech
Topic: Anyone been able to reach Isky Cams lately?
Replies: 36
Views: 2668

Re: Anyone been able to reach Isky Cams lately?

I think it's understandable to debate the nuts & bolts ....... sequence even ...... of the process, but it's really what works for you It seems as the main bugbear is when people lose control of the process to the customer, that's when it get's annoying, and you have to aim not to allow that to ...
by BCjohnny
Tue Mar 19, 2024 3:02 am
Forum: Engine Tech
Topic: Anyone been able to reach Isky Cams lately?
Replies: 36
Views: 2668

Re: Anyone been able to reach Isky Cams lately?

Pretty much everyone faces the same problems, especially if you're a limited operation or one man band ...... talking as a machinist/builder Initial contact I'm happy to take over the phone, it's more personable and many potential customers feel happier talking to the organ grinder ...... although t...
by BCjohnny
Mon Mar 18, 2024 5:00 am
Forum: Engine Tech
Topic: SBC Valves - GMPP Vortec Heads
Replies: 10
Views: 440

Re: SBC Valves - GMPP Vortec Heads

I quickly took cylinder 3 intake spring off and attempted to slide the valve out, but I can't get it out of the guide. It only goes down to the lock area and stops, I could probably force it down, but I didn't. I am worried that the valve stem maybe bent....or have you come across an issue with the...
by BCjohnny
Mon Mar 18, 2024 3:05 am
Forum: Engine Tech
Topic: My CompCams Cam Card ECL Question
Replies: 24
Views: 850

Re: My CompCams Cam Card ECL Question

If the numbers are indeed accurate I'd see it more as confirmation of good QC than some kind of error

If my maths are correct you're talking 1 / 7200 of a circle, or 3 minutes, which is a very small amount and I'd guess well within tolerance
by BCjohnny
Sun Mar 17, 2024 8:47 am
Forum: Engine Tech
Topic: Anyone know what size this is?
Replies: 12
Views: 968

Re: Anyone know what size this is?

Likely 5/16", if so I'd use a common 8mm 'sump plug' bit

As said, I doubt it's going anywhere, with any bit, without prudent use of heat prior .....
by BCjohnny
Fri Mar 08, 2024 11:16 am
Forum: Engine Tech
Topic: 351w crank specs
Replies: 7
Views: 536

Re: 351w crank specs

A lot will depend on the intended use, budget ...... and what you can handle yourself , but generally ....... Assuming the crank journals are relatively round & straight , and it's a budget deal, I'd first put the mains in the block and measure the clearance ...... anything at the upper end unde...
by BCjohnny
Thu Mar 07, 2024 2:53 pm
Forum: Engine Tech
Topic: Narrowing rods?
Replies: 9
Views: 871

Re: Narrowing rods?

A picture is worth a thousand words ..... but you're not narrowing them much, so it's likely possible The bearings may or may not need narrowing, you may get away with just chamefering them to clear the fillet A lot of this will depend on your machining skills and equipment, if you have to pay someo...
by BCjohnny
Tue Mar 05, 2024 5:56 am
Forum: Engine Tech
Topic: Wiseco Red piston weight
Replies: 6
Views: 469

Re: Wiseco Red piston weight

BillK ..... many thanks, something to work from ......
by BCjohnny
Mon Mar 04, 2024 5:23 am
Forum: Engine Tech
Topic: Wiseco Red piston weight
Replies: 6
Views: 469

Re: Wiseco Red piston weight

BillK, thanks .......

Pt. No. is SKU: RED0007X1

RED Series Chevy Small Block Piston Set – 4.135 In. Bore – 1.000 .In CH, -6.60 CC

Cheers, John
by BCjohnny
Sat Mar 02, 2024 10:32 am
Forum: Engine Tech
Topic: Wiseco Red piston weight
Replies: 6
Views: 469

Wiseco Red piston weight

Does anyone have a ballpark total weight for these, so I can rough gauge the balance I have already ?

Pistons, pins & rings ...... if it's on the Wiseco site I can't see it

They're a couple of weeks out and time is getting tight

TIA John
by BCjohnny
Thu Feb 29, 2024 8:59 am
Forum: Engine Tech
Topic: exhaust valve diagnosis
Replies: 6
Views: 473

Re: exhaust valve diagnosis

Radial 'distress' on a valve ..... up to and including actual cracking ..... is usually a sign on thermal overloading, as said

Either the material isn't up to it, unlikely in this case, or something else is causing thermal overloading ..... obviously
by BCjohnny
Wed Feb 14, 2024 3:18 pm
Forum: Engine Tech
Topic: How centered does a piston pin need to be?
Replies: 30
Views: 1270

Re: How centered does a piston pin need to be?

Never cared much for the Sunnen system, it still pushes against the piston boss, and as most piston bosses have a draught ..... they're closer together near the crown ........ you simply can't push against the boss squarely, so deform it blah blah A fixture that supports the pin end of the rod direc...
by BCjohnny
Wed Feb 14, 2024 4:33 am
Forum: Engine Tech
Topic: How centered does a piston pin need to be?
Replies: 30
Views: 1270

Re: How centered does a piston pin need to be?

Another way of looking at is moving it could do more harm than good And there in lies the rub ....... try to nudge the pin over against the boss and more than likely the edge of the piston bore will deform and pinch the pin, if you don't actually distort the piston wholesale itself I guess people c...
by BCjohnny
Tue Feb 13, 2024 4:27 pm
Forum: Engine Tech
Topic: How centered does a piston pin need to be?
Replies: 30
Views: 1270

Re: How centered does a piston pin need to be?

In some respects it's ultimately as much to do with customer perception/expectation as engineering ...... pretty much what started this thread So if the obvious things haven't been done with reasonable care, how about the rest of it ? I tend to get them visually centred on the pins, within reason, a...