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Search found 11884 matches

by MadBill
Sun Dec 08, 2019 12:14 am
Forum: Engine Tech
Topic: Flat Plane V8 Race Engine - Single Exit Exhaust Question
Replies: 42
Views: 1066

Re: Flat Plane V8 Race Engine - Single Exit Exhaust Question

So this is a 250 inch V8, two banks and each bank header is using a 2.5" collector choke? What is the port area? IMO you are way off somewhere. :shock: If I read 400 hp than 2.5 OD is good enough for a tail pipe and you can always step up a bit with some AR valves. There is no problem running any e...
by MadBill
Sat Dec 07, 2019 10:25 pm
Forum: Engine Tech
Topic: Flat Plane V8 Race Engine - Single Exit Exhaust Question
Replies: 42
Views: 1066

Re: Flat Plane V8 Race Engine - Single Exit Exhaust Question

So this is a 250 inch V8, two banks and each bank header is using a 2.5" collector choke? What is the port area? IMO you are way off somewhere. :shock: If I read 400 hp than 2.5 OD is good enough for a tail pipe and you can always step up a bit with some AR valves. There is no problem running any e...
by MadBill
Fri Dec 06, 2019 11:19 pm
Forum: Engine Tech
Topic: DYNO MUFFLERS
Replies: 2
Views: 261

Re: DYNO MUFFLERS

You should post this in cars/parts for sale: viewforum.php?f=31
by MadBill
Thu Dec 05, 2019 9:19 pm
Forum: Engine Tech
Topic: Rod strength
Replies: 35
Views: 1128

Re: Rod strength

Here's one way it's done:
by MadBill
Thu Dec 05, 2019 9:03 pm
Forum: Engine Tech
Topic: 3D Printing - Cool Assembly Tools?
Replies: 39
Views: 2843

Re: 3D Printing - Cool Assembly Tools?

Cool, but for v. 3.1 you could get by with only one adjustable arm.
by MadBill
Thu Dec 05, 2019 12:12 pm
Forum: Engine Tech
Topic: Flat Plane V8 Race Engine - Single Exit Exhaust Question
Replies: 42
Views: 1066

Re: Flat Plane V8 Race Engine - Single Exit Exhaust Question

If it comes to choosing one of your current systems, the brown curve will definitely get you around the track faster.
by MadBill
Tue Dec 03, 2019 12:18 am
Forum: Engine Tech
Topic: curious 1960s cam tech
Replies: 14
Views: 1017

Re: curious 1960s cam tech

That would be the Bus Schaller quarter speed cam: https://www.google.com/search?sxsrf=ACYBGNT4IdRazHWDqFkb5VIRHb_ANBim8A:1575350128913&q=schaller+quarter+speed+camshaft&tbm=isch&source=univ&sa=X&ved=2ahUKEwjIidLG3JjmAhUCy1kKHZCPCRUQsAR6BAgEEAE&biw=1904&bih=914 Seems to me to have zero pluses and sev...
by MadBill
Mon Dec 02, 2019 10:25 pm
Forum: Engine Tech
Topic: Wrist pin diameter and rpms
Replies: 21
Views: 699

Re: Wrist pin diameter and rpms

Looks very short to me, in fact I'd call it a chamfer rather than a taper. Maybe that's the most they can get away with, short of encountering the aforementioned ovalizing issue..

There also appears to be a chamfer on the lower edge of the small end bore.
by MadBill
Mon Dec 02, 2019 8:38 pm
Forum: Engine Tech
Topic: Wrist pin diameter and rpms
Replies: 21
Views: 699

Re: Wrist pin diameter and rpms

Somewhere I've seen tapered pins with sort of internal 'flanges' at the outboard ends, to reduce ovality under loads...
by MadBill
Sun Dec 01, 2019 12:10 am
Forum: Offtopic Forum
Topic: Ya know your getting old when you remember
Replies: 18
Views: 469

Re: Ya know your getting old when you remember

In a thread titled "Ya Know You're Getting Old When..." one can count on well-aged respondents, but I have a growing suspicion that Speed-Talkers' median age is about sixty! At 76 I plan to be at this for a few years yet, but it would be nice to know that there's a following generation or two to fil...
by MadBill
Sat Nov 30, 2019 11:56 pm
Forum: Engine Tech
Topic: Lash ramps for solid cams
Replies: 17
Views: 841

Re: Lash ramps for solid cams

Isn't there one missing? I thought the sequence was : displacement-velocity-acceleration-jerk-quirk-snap-crackle and then pop; seven in all, ignoring displacement?
by MadBill
Sat Nov 30, 2019 9:37 pm
Forum: Engine Tech
Topic: Lash ramps for solid cams
Replies: 17
Views: 841

Re: Lash ramps for solid cams

There are multiple types of lash ramps( constant Velocity, Constant Acceleration, Constant Jerk, etc). One of the most critical points in cam design is the velocity at the lash point. Since the majority of the mass in the valvetrain (valve, spring, retainer, rocker) isn't moving, below the lash poi...
by MadBill
Thu Nov 28, 2019 12:59 am
Forum: Engine Tech
Topic: -0.015" Big Block Timing Chain
Replies: 61
Views: 3734

Re: -0.015" Big Block Timing Chain

Post Script: Received and installed the 'dash ten' Cloyes chain (identified, as specified, by two copper-colored links) and it fits much tighter on the same sprockets as the new standard chain I removed; just enough slack to compensate for the calculated ~ 0.004" C-C greater expansion of the aluminu...
by MadBill
Thu Nov 28, 2019 12:26 am
Forum: Engine Tech
Topic: 4150 to 4500 Intake Conversion
Replies: 8
Views: 480

Re: 4150 to 4500 Intake Conversion

Also, there are 4150 carbs the flow over 1200 CFM, so unless you're going really big on the 4500...
by MadBill
Tue Nov 26, 2019 10:27 pm
Forum: Engine Tech
Topic: Flat Plane V8 Race Engine - Single Exit Exhaust Question
Replies: 42
Views: 1066

Re: Flat Plane V8 Race Engine - Single Exit Exhaust Question

I don't know if the latest PipeMax program includes a single tailpipe on a V-8, but I'm pretty sure Burns has designs. Alternatively, here's Brzezinski's stuff: https://www.castheads.com/manifolds-car ... r-systems/