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BMac
Dodge Dakota
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3/02/2007
10:27:09
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 Subject: RE: 360 Valves Smaller than 318's?
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My book says the 318 valves are bigger than the 360's!
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SteveUK
Dodge Dakota
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3/02/2007
10:35:57
| RE: 360 Valves Smaller than 318's?
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I was looking at this link from the other thread
http://dodgeram.org/tech/gas/specs/5_2v8.htm
gives 318 magnum as:
1.916 inch int.
1.624 inch ex.
which is pretty close to what I measured:
1.92 inch int.
1.613 inch ex.
and possibly within the margin of error of my equipment/method.
The link for the 360 magnum gives the same valve diameters as your book, and in fact I have never seen bigger figures quoted anywhere for any 360 ever.
But then again, this is the first time I have found any reference to the 318 valves being bigger than that - so you never know.
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SteveUK
Dodge Dakota
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3/02/2007
11:32:49
| RE: 360 Valves Smaller than 318's?
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"The link for the 360 magnum gives the same valve diameters as your book, and in fact I have never seen bigger figures quoted anywhere for any 360 ever."
Correction - this applies only to intake valves, the 360 info. at
http://dodgeram.org/tech/gas/specs/5_9v8.htm
gives 1.617 inch for 360 magnum exhaust.
Which makes me wonder - is there possibly an issue fitting 2.02 intake valves to some of these engines ?
The 2.02s are a bloody close fit with 1.6 exhaust valves.
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gen1dak
Dodge Dakota
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3/02/2007
12:05:38
| RE: 360 Valves Smaller than 318's?
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No fit issues. 360 Magnums have exactly the same size intake and exhaust valves as all prior 360's. The heads easily accept 2.02" intake valves, even 2.08" intake valves (thanks to valves opening on the centerline of the cylinder-even the 318 can do this), just like 360LA and 340's. Mopar Performance even sells Magnum heads with 2.02" intake valves.
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SteveUK
Dodge Dakota
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4/02/2007
17:17:11
| RE: 360 Valves Smaller than 318's?
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Message to BMac
I have now pulled the heads off my 2000 360 magnum motor and the valves are exactly the same size as the ones on my 1993 318 magnum.
In other words - they are bigger than 360 LA valves
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BMac
Dodge Dakota
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4/02/2007
20:21:25
| RE: 360 Valves Smaller than 318's?
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Thanks Stevie!
Now I am wondering about the older engine or if this Mopar Performance book is misprinted!
It seemed like a misprint to me but it was in other places stating the same thing.
BMac
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gen1dak
Dodge Dakota
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4/03/2007
00:29:24
| RE: 360 Valves Smaller than 318's?
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Wrong.
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Shoe
GenIII
4/03/2007
19:57:54
| RE: 360 Valves Smaller than 318's?
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40 thousandths of an inch is quite a bit when you are comparing something like that. I work for a company that makes timing gear sets and 40 thousandths over or undersized is a whole lot. Chevrolets new HFV6 motors are even worse on dimensions. They deal with microns (millimeters) insteads of inches.
'97 RC V6, 5spd, soon to be V8, 5spd!
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Super bee
GenI
4/04/2007
01:20:41
| RE: 360 Valves Smaller than 318's?
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its so much easier to machine things in metric. that is if you have the equipment o do it
and most CNCs are more accurate when in metric anyway
1990 sport RC SB, 1995 318drivetrain, 3.92 gears (came with truck) Powertrax "traction system", 95 dash/steering wheel, hearthrob exhaust, headers, cutout after y-pipe, necessary electric fan add-a-leafs, 30x9.5 mud tires, cranked T-bars, AR 39 15x8 rims, grill guard, roll bars
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Shoe
GenIII
4/04/2007
18:25:53
| RE: 360 Valves Smaller than 318's?
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It is if you have the right equipment and not all CNCs are that accurate, we use a lot of Dawoo (sp?). I think that most of our dimensions give you like 60 microns (millimeters ) or about 2 thousandths of an inch.
'97 RC V6, 5spd, soon to be V8, 5spd!
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Super bee
GenI
4/05/2007
00:38:58
| RE: 360 Valves Smaller than 318's?
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Message:
it depends on the size of parts you are machining and what size machine as well
a CNC with accuracy to like .0005 and have a 100" travel would be OBSCENELY expensive
1990 sport RC SB, 1995 318drivetrain, 3.92 gears (came with truck) Powertrax "traction system", 95 dash/steering wheel, hearthrob exhaust, headers, cutout after y-pipe, necessary electric fan add-a-leafs, 30x9.5 mud tires, cranked T-bars, AR 39 15x8 rims, grill guard, roll bars
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