Evadman
Administrator Emeritus<br>Elite Member
- Feb 18, 2001
- 30,990
- 5
- 81
Was that just a guess? if so, it was a good one. 2 gallons of primer and one for color/clear coat. Very nice. For those that do not know, most manufacturers actually dip the vehicle in a huge vat of primer, not spray it. GM also electricly charges the paint (both primer and color/clear) for better adheasion and even color application.
- Feb 1, 2000
- 5,854
- 72
- 91
No......'65 and later big blocks had two different length pushrods, though....
The 348/409 was called the 'W' engine because of the shape of the valve covers
Bunch of lightweights
Several questions ;
(1)What is the ideal stroke to connecting rod length ratio ?
(2)What American automobile manufacturer used overhead valves exclusively in their engine designs since their inception as a vehicle manufacturer ?
(3)When pistons are manufacturered, they are machined in a oval pattern on their outer circumference below the oil ring, why is this done ?
(4)What is piston pin offset and what is it's purpose ?
(5)Name three different types of piston ring materials.
(6)What is align boring and it's purpose ?
(7)The following are three types of combustion chamber designs, what are their pros and cons ;
(a)Wedge
(b)Hemispherical
(c)Bean
(8)The following are two types of piston pin arrangements, what are their pros and cons ;
(a)Full-floating
(b)Semi-floating
(9)What is the average pressure inside the combustion chamber upon ignition in your average automobile engine ?
(10)What is the purpose of ignition advance (Mechanical and vacuum) ?
If these are answered, I will post somewhat more difficult questions
Several questions ;
(1)What is the ideal stroke to connecting rod length ratio ?
(2)What American automobile manufacturer used overhead valves exclusively in their engine designs since their inception as a vehicle manufacturer ?
(3)When pistons are manufacturered, they are machined in a oval pattern on their outer circumference below the oil ring, why is this done ?
(4)What is piston pin offset and what is it's purpose ?
(5)Name three different types of piston ring materials.
(6)What is align boring and it's purpose ?
(7)The following are three types of combustion chamber designs, what are their pros and cons ;
(a)Wedge
(b)Hemispherical
(c)Bean
(8)The following are two types of piston pin arrangements, what are their pros and cons ;
(a)Full-floating
(b)Semi-floating
(9)What is the average pressure inside the combustion chamber upon ignition in your average automobile engine ?
(10)What is the purpose of ignition advance (Mechanical and vacuum) ?
If these are answered, I will post somewhat more difficult questions
number 7, what is a bean head? there are poly heads or semi hemi heads
number 2 Cadillac? just a guess
number 2 Cadillac? just a guess
Enough of the Chevy/GM questions.
Roger, I didn't want to write an essay today.
Ford Question: What year did Ford not offer a V8 in the Mustang?
Roger, I didn't want to write an essay today.
Ford Question: What year did Ford not offer a V8 in the Mustang?
Originally posted by: Roger
I want a new title.
Thread Killer
Cardiopulmonary resuscitation bump, accompanied by baseless guess :-D
Studebaker?
Zenmervolt
Elite member
- Oct 22, 2000
- 24,514
- 44
- 91
I can't answer any of Roger's questions, but I'll post something easier for the rest of us.
On a Volkswagen Type IV engine, what does the Fan Belt drive?
ZV
On a Volkswagen Type IV engine, what does the Fan Belt drive?
ZV
- Feb 1, 2000
- 5,854
- 72
- 91
OK Rog, I got a few of yours....
3) Pistons are machined oval so that when they heat up, they become round.
4) Piston pin offset: Piston pin is offset to one side of the piston, to reduce piston noise
5) Piston ring materials: cast iron, ductile iron (compression rings), chrome-plated steel (oil rings)
6) Line boring: the main caps are surfaced on the block side, then bolted on, then a boring bar is used create a new crankshaft bore. The process makes sure all the mains are in perfect alignment.
8) Piston pins: Full-floating- pro: easier to assemble con: needs spirolox to retain it in the piston, needs rod small-end oiling. If by 'semi-floating' you mean 'pressed-pin', pro: no oiling needed thru con rod, no spirolox, more reliable long-term. con: needs interference fit in con rod for assembly.
10) Ignition advance: as the engine spins faster, the spark has to be ignited sooner, in order for maximum cylinder pressure to occur at the desired time. Mechanical advance takes care of this, with a centrifugal system of weights. Vacuum advance increases advance under high intake vacuum conditions, increasing highway fuel economy. It is connected to ported vacuum so that it doesn't come into play at idle.
That's all I can really answer off the top of my head. Did you pull these questions outta your memory, or off some test?
Oh, what about my Chevy W-motor combustion chamber question?
JC
3) Pistons are machined oval so that when they heat up, they become round.
4) Piston pin offset: Piston pin is offset to one side of the piston, to reduce piston noise
5) Piston ring materials: cast iron, ductile iron (compression rings), chrome-plated steel (oil rings)
6) Line boring: the main caps are surfaced on the block side, then bolted on, then a boring bar is used create a new crankshaft bore. The process makes sure all the mains are in perfect alignment.
8) Piston pins: Full-floating- pro: easier to assemble con: needs spirolox to retain it in the piston, needs rod small-end oiling. If by 'semi-floating' you mean 'pressed-pin', pro: no oiling needed thru con rod, no spirolox, more reliable long-term. con: needs interference fit in con rod for assembly.
10) Ignition advance: as the engine spins faster, the spark has to be ignited sooner, in order for maximum cylinder pressure to occur at the desired time. Mechanical advance takes care of this, with a centrifugal system of weights. Vacuum advance increases advance under high intake vacuum conditions, increasing highway fuel economy. It is connected to ported vacuum so that it doesn't come into play at idle.
That's all I can really answer off the top of my head. Did you pull these questions outta your memory, or off some test?
Oh, what about my Chevy W-motor combustion chamber question?
JC
Zenmervolt
Elite member
- Oct 22, 2000
- 24,514
- 44
- 91
Originally posted by: Roger
Bunch of lightweights
Several questions ;
(1)What is the ideal stroke to connecting rod length ratio ?
(2)What American automobile manufacturer used overhead valves exclusively in their engine designs since their inception as a vehicle manufacturer ?
(3)When pistons are manufacturered, they are machined in a oval pattern on their outer circumference below the oil ring, why is this done ?
(4)What is piston pin offset and what is it's purpose ?
(5)Name three different types of piston ring materials.
(6)What is align boring and it's purpose ?
(7)The following are three types of combustion chamber designs, what are their pros and cons ;
(a)Wedge
(b)Hemispherical
(c)Bean
(8)The following are two types of piston pin arrangements, what are their pros and cons ;
(a)Full-floating
(b)Semi-floating
(9)What is the average pressure inside the combustion chamber upon ignition in your average automobile engine ?
(10)What is the purpose of ignition advance (Mechanical and vacuum) ?
If these are answered, I will post somewhat more difficult questions
#2: Cadillac
#6: already answered, but I'd add that one of the first vehicles it was done in was the Vega.
Out of my head, this is what I do for a living
Answer;
Beats the hell out of me !!
Zem;
I'll refrain from answering that
Answers ;
(1)1.8
(2)Chevy
(3)To reduce piston slap when cold
(4)To reduce piston slap at top dead center
(5)Cast Iron
Ductile Iron
Chrome
Moly
Deves High silicone steel
(6)Align boring trues the main bearing caps/bore to the center line of the deck (Where the heads bolt on)
(7)
Wedge head,
pros, cheap to manufacture, decent breathing potential, decent thermal efficiency, cons, poor valve clearancing.
Hemi head,
Pros, Excellent breathing potential, excellent valve clearancing, cons, poor thermal efficiency, poor detonation characteristics.
Bean head,
Pros, Excellent thermal efficiency, excellent detonation characteristics, decent breathing potential, cons, Poor valve clearancing.
(8)
Full-floating, both piston and connecting rod float on the pin, easy to disassemble and reassemble but a much weaker connection than semi-floating, causes piston rocking and subsequent loss of ring seal plus accelerated wear.
Semi-floating, piston floats on pin but the connecting rod is a press fit, a much stronger connection but difficult to assemble correctly without damage, harder to assemble/disassemble on engine.
(9)3,500 P.S.I.
(10)Mechanical advance is needed to start the flame front as piston speed increases.
Vacuum advance is needed under light load conditions to extract the maximum amount of power to decrease fuel consumption.
Edit ;
I changed my mind, the belt drives the ..................
(A ten letter word)
Zenmervolt
Elite member
- Oct 22, 2000
- 24,514
- 44
- 91
Dang you.Originally posted by: Roger
Edit ;
I changed my mind, the belt drives the ..................
(A ten letter word)
Addendum to my question: If the fan belt does not drive the fan, why is it called the fan belt?
ZV
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