Search found 542 matches
- Fri Apr 12, 2024 4:13 pm
- Forum: Engine Tech
- Topic: Fuel flow restriction
- Replies: 6
- Views: 384
Re: Fuel flow restriction
Often a fuel flow restriction will not show up til the top end in high gear. My carbed car would quit at the 1200 foot mark, fine through the gears. As a stopgap measure it would go the full 1320 with a full tank of fuel. That was with the original 6 cylinder 5/16" fuel line.
- Wed Dec 06, 2023 8:34 pm
- Forum: Vintage/Classic/Historical Engine Tech
- Topic: Suddenly, it's 1953 again.
- Replies: 15
- Views: 4404
Re: Suddenly, it's 1953 again.
I have no experience with a flathead, so am not really a good person to comment. I can only say acceleration is proportional to the square of rpm, and linear with stroke and piston weight. Shorter rod length has an influence. All of those cannot be large numbers on that engine.
- Wed Dec 06, 2023 2:55 pm
- Forum: Vintage/Classic/Historical Engine Tech
- Topic: Suddenly, it's 1953 again.
- Replies: 15
- Views: 4404
Re: Suddenly, it's 1953 again.
It's reasonably do-able in todays age. The difficulty would be in the measuring of the block to make the model. Would you ever have some kind of factory block drawing? My dad sold his spare Champion engine. If the bolt pattern was symmetrical (that would be too much to ask) you could cut a scrap iro...
- Sat Dec 02, 2023 10:34 pm
- Forum: Vintage/Classic/Historical Engine Tech
- Topic: Suddenly, it's 1953 again.
- Replies: 15
- Views: 4404
Re: Suddenly, it's 1953 again.
I have that stuff on my bench. The difficulty is getting the shape of the port right for the 3D model. But it seems pretty good for assessing head differences and it makes a reasonable comparison to a more conventional OHV. Showed some surprises.
- Sun Nov 26, 2023 9:51 pm
- Forum: Engine Tech
- Topic: Something I haven’t seen mentioned with valve train deflection
- Replies: 43
- Views: 3942
Re: Something I haven’t seen mentioned with valve train deflection
Titanium E is ~16 x 10^^6, and steel is ~31 x 10^^6, so a Ti retainer will deflect about double that of a steel for the same dimensions.
- Sat Oct 07, 2023 7:36 pm
- Forum: Vintage/Classic/Historical Engine Tech
- Topic: Jay Leno -- It's a Dusie!
- Replies: 2
- Views: 1266
Re: Jay Leno -- It's a Dusie!
Great article - and a mercury crank damper inside the crankcase!
- Sat Sep 16, 2023 2:44 pm
- Forum: Engine Tech
- Topic: Testing - Wet flow test rig Ford A460 head - This is only a test !
- Replies: 89
- Views: 67039
Re: Testing - Wet flow test rig Ford A460 head - This is only a test !
One observation for the CFD proponents (and I am one, with qualifiers) is air fuel is 2 phase flow, and CFD for that is very limited in capability. I was involved in a 2 phase CFD development program on a practical example a few years ago, and found it essentially useless. To make the model run in a...
- Sun Aug 13, 2023 11:50 pm
- Forum: Engine Tech
- Topic: Laminar vs. Turbulent Flow through a Radiator
- Replies: 26
- Views: 5782
Re: Laminar vs. Turbulent Flow through a Radiator
Reynolds number increases with velocity so flow is more turbulent with high velocity. H (heat transfer value) value also increases with velocity. They have it backwards.
- Sun Jul 30, 2023 7:37 pm
- Forum: Engine Tech
- Topic: Is this valve usable?
- Replies: 15
- Views: 1532
Re: Is this valve usable?
Ti is very notch sensitive
- Wed Jul 05, 2023 8:18 pm
- Forum: Engine Tech
- Topic: cutting valve reliefs in pistons
- Replies: 15
- Views: 2114
Re: cutting valve reliefs in pistons
Big block Mopar the stems are not lined up with the centre of the bore. I forget the exact number but it is a big one. Somewhere around .35" toward the plug side.
Always wondered why they moved the pierce points that far off.
Always wondered why they moved the pierce points that far off.
- Sun Jun 11, 2023 7:44 pm
- Forum: Engine Tech
- Topic: BBF Rocker Pivot Length Help
- Replies: 17
- Views: 2279
Re: BBF Rocker Pivot Length Help
https://tdmach.com/catalog/
The T&D catalog has listed info on a lot rocker pivot lengths. In there both BBC and BBF are listed at 1.650"
The T&D catalog has listed info on a lot rocker pivot lengths. In there both BBC and BBF are listed at 1.650"
- Thu May 11, 2023 1:55 pm
- Forum: Engine Tech
- Topic: What's better A timing chain setup or a gear drive setup
- Replies: 56
- Views: 5521
Re: What's better A timing chain setup or a gear drive setup
ATI has a lot of experience, but unfortunately there are a lot of factors and unfortunately they would not have as much AMC experience. I know at least a few years ago they had the equipment and did torsional vibration amplitude measurements which is a lot better than most aftermarket dampers who do...
- Thu May 11, 2023 12:12 pm
- Forum: Engine Tech
- Topic: What's better A timing chain setup or a gear drive setup
- Replies: 56
- Views: 5521
Re: What's better A timing chain setup or a gear drive setup
The question cannot be correctly answered without understanding the effectiveness of the damper and is the engine operated in a range where a critcal crankshaft exciting order lines up with a crank torsional vibration mode. You will have rpm points where the excitation and modes do line up, the ques...
- Fri May 05, 2023 9:42 pm
- Forum: Engine Tech
- Topic: LS7 valve guide wear.
- Replies: 34
- Views: 3369
Re: LS7 valve guide wear.
I have no experience with the LS7, but deal a fair amount with Titanium. Ti actually has a very low alpha (coefficient of thermal expansion) so it will grow a tiny bit looser at temp, but at this small diameter it will be extremely minor. Ti also has "surface properties unsuitable for a wear ap...
- Mon May 01, 2023 5:27 pm
- Forum: Vintage/Classic/Historical Engine Tech
- Topic: Original stock valve angles
- Replies: 11
- Views: 2502
Re: Original stock valve angles
AMC is 18
BBD is 15
BBD is 15