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Search found 1430 matches

by panic
Sat Sep 26, 2020 8:54 am
Forum: Engine Tech
Topic: 202ci intake manifold ideas
Replies: 32
Views: 635

Re: 202ci intake manifold ideas

The Chevy 194, 215, 230, 250, 292 is siamese port, not 12 port. Very different.
by panic
Wed Sep 23, 2020 10:38 am
Forum: Engine Tech
Topic: Connecting Rod Tech.
Replies: 19
Views: 886

Re: Connecting Rod Tech.

FEA can simulate anything you want

Please explain input for crank rotation?
by panic
Tue Sep 22, 2020 7:56 pm
Forum: Engine Tech
Topic: Connecting Rod Tech.
Replies: 19
Views: 886

Re: Connecting Rod Tech.

AFAIK FEA only allows a single input in 1 plane = 1 test each for tension and compression. The actual stress on each molecule of the rod depends in part on its vector. In common understanding, the pin eye is subjected only to reciprocating forces, but the entire eye (and pin bushing, pin) also oscil...
by panic
Tue Sep 22, 2020 5:47 pm
Forum: Engine Tech
Topic: Connecting Rod Tech.
Replies: 19
Views: 886

Re: Connecting Rod Tech.

In compression or tension?
by panic
Tue Sep 22, 2020 5:45 pm
Forum: Engine Tech
Topic: Bronze cam bearings
Replies: 13
Views: 504

Re: Bronze cam bearings

Bronze is not really the best material for a cam bearing
"Bronze" is only slightly more precise than "metal", there are hundreds.
SAE 660 (CDA 932) has been used for cam bearings for 90 years that I know of.
Why is this wrong?
by panic
Fri Sep 18, 2020 1:53 pm
Forum: Engine Tech
Topic: Carb'd Procharger vs Supercharger...
Replies: 8
Views: 632

Re: Carb'd Procharger vs Supercharger...

The 2 systems do not provide the same RPM vs. boost curve. Positive displacement blowers are generally linear, centrifugals produce boost ~ the square of RPM.
This means that exact launch technique, shift point, etc. are a larger variable with a centrifugal.
by panic
Mon Sep 14, 2020 2:13 pm
Forum: Engine Tech
Topic: Cam intake lobe vs exhaust lobe
Replies: 11
Views: 1550

Re: Cam intake lobe vs exhaust lobe

#1 reason why intake and exhaust lobes match: it's the cheapest way to make the cam.
The intake and exhaust ports have completely different functions, and what happens in each has almost no similarities (except gas volume).
by panic
Sun Sep 13, 2020 7:29 pm
Forum: Engine Tech
Topic: Why no Ardun hemi head SBC conversion?
Replies: 48
Views: 1528

Re: Why no Ardun hemi head SBC conversion?

they hacked a third off

Makes it sound like actually shortening the parts will do it.
Completely different crankshaft: V12 is usually either a 60° block, or 90° block + 30° pin offset, V8 is usually a 90° block.
by panic
Sun Sep 13, 2020 9:32 am
Forum: Engine Tech
Topic: Why no Ardun hemi head SBC conversion?
Replies: 48
Views: 1528

Re: Why no Ardun hemi head SBC conversion?

Chrysler's first hemi was almost a dimensional copy, just short of it being interchangeable

Just that tiny difference: every single dimension is miles off.
by panic
Tue Sep 08, 2020 7:36 pm
Forum: Engine Tech
Topic: Why no Ardun hemi head SBC conversion?
Replies: 48
Views: 1528

Re: Why no Ardun hemi head SBC conversion?

since their the same engine

Please list similarities?
by panic
Tue Sep 08, 2020 12:53 pm
Forum: Engine Tech
Topic: Why no Ardun hemi head SBC conversion?
Replies: 48
Views: 1528

Re: Why no Ardun hemi head SBC conversion?

Most popular "flathead to hemi" conversion: Harley-Davidson K model (1952-69 in all variants) > iron Sportster (1957-85)
by panic
Mon Sep 07, 2020 6:44 pm
Forum: Engine Tech
Topic: Ramshorns..
Replies: 10
Views: 725

Re: Ramshorns..

Especially the "lack of" overlap for the CI exhaust. Individual primaries cleans up exhaust re-breathing from the other cylinders in a common casting.
More cam > header more valuable.
by panic
Mon Sep 07, 2020 6:42 pm
Forum: Engine Tech
Topic: Why no Ardun hemi head SBC conversion?
Replies: 48
Views: 1528

Re: Why no Ardun hemi head SBC conversion?

why Ardun never made a SBC Hemi head conversion
It's a business, not a hobby.
by panic
Mon Sep 07, 2020 6:33 pm
Forum: Engine Tech
Topic: Stock Eliminator secrets?
Replies: 143
Views: 7441

Re: Stock Eliminator secrets?

Top secret: marry the tech leader's mom.
by panic
Sun Sep 06, 2020 11:17 am
Forum: Engine Tech
Topic: Webers, Dell'Ortos & IR Dominators
Replies: 5
Views: 361

Re: Webers, Dell'Ortos & IR Dominators

An IR carburetor's WOT circuit is designed to use the very long vacuum delay between intake strokes for enrichment.