:::RHMT::: Real Home Made Turbo
General Category => Hybrid/Tech => Topic started by: jabberwock on June 25, 2010, 12:10:32 PM
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Same shit as the LS thread. JD, in your research what have you found out as far as D valves go? Anything larger swappable that's OEM?
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Rule of thumb is anything bigger than 0.5mm oversized needs a new seat. For a D, I'd go bigger with the intakes and let the exhaust figure it's own way out of the chamber.
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Rule of thumb is anything bigger than 0.5mm oversized needs a new seat. For a D, I'd go bigger with the intakes and let the exhaust figure it's own way out of the chamber.
I'd do the opposite.
Going bigger on the intake side just means the outer edge is shrouded by the cylinder wall more.
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Couldn't you just cut a little on the top cylinder to help with flow?
Sort of like what they do for SBC or SBF when they are using 2.02 or 2.06" intake valves on a small than 4.00 bore. :-\
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Couldn't you just cut a little on the top cylinder to help with flow?
Sort of like what they do for SBC or SBF when they are using 2.02 or 2.06" intake valves on a small than 4.00 bore. :-\
steel block vs thin steel liners. Now if the block is sleeved out to 78/79 mm, then 1mm over on the valves is useful.
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Rule of thumb is anything bigger than 0.5mm oversized needs a new seat. For a D, I'd go bigger with the intakes and let the exhaust figure it's own way out of the chamber.
I'd do the opposite.
Going bigger on the intake side just means the outer edge is shrouded by the cylinder wall more.
Yes, but on which head, Bone? There are two different valve spacings in the proper D-series families.
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Rule of thumb is anything bigger than 0.5mm oversized needs a new seat. For a D, I'd go bigger with the intakes and let the exhaust figure it's own way out of the chamber.
I'd do the opposite.
Going bigger on the intake side just means the outer edge is shrouded by the cylinder wall more.
Yes, but on which head, Bone? There are two different valve spacings in the proper D-series families.
More info on this valve spacing please. ;D
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Have you never looked at an A6/B1/B2//B head compared to a Z1/Z6/Y5/Y7/Y8 head?
The valve spacing difference is quite apparent.
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Have you never looked at an A6/B1/B2//B head compared to a Z1/Z6/Y5/Y7/Y8 head?
The valve spacing difference is quite apparent.
I look at the B7 an B8 heads but I figured the valve spacing would be the same if you use z6 valves and seats. :-\
Never really dove into the spacing and shrouding issue.
Maybe I will look at this more. ;D
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Have you never looked at an A6/B1/B2//B head compared to a Z1/Z6/Y5/Y7/Y8 head?
The valve spacing difference is quite apparent.
I look at the B7 an B8 heads but I figured the valve spacing would be the same if you use z6 valves and seats. :-\
Never really dove into the spacing and shrouding issue.
Maybe I will look at this more. ;D
Valve spacing is not a characteristic determined by the the valves and seats, but rather the casting itself.
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Have you never looked at an A6/B1/B2//B head compared to a Z1/Z6/Y5/Y7/Y8 head?
The valve spacing difference is quite apparent.
I look at the B7 an B8 heads but I figured the valve spacing would be the same if you use z6 valves and seats. :-\
Never really dove into the spacing and shrouding issue.
Maybe I will look at this more. ;D
Valve spacing is not a characteristic determined by the the valves and seats, but rather the casting itself.
I usually look at the valve edge to edge spacing, and the valve edge to cylinder wall issue. I have had no need to look at the valve center to valve center, until now.
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Bump because, while neither Russ nor I give a shit, Staley Dan is whining about this to me basically all the goddamn time.
FYI F22/F23 intakes are 34mm, but 2.5mm short.
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Bump because, while neither Russ nor I give a shit, Staley Dan is whining about this to me basically all the goddamn time.
FYI F22/F23 intakes are 34mm, but 2.5mm short.
I see what he is saying.
ENGINE CODE V-TEC D16Y8 V-TEC
INTAKE PV4370HP-C 1.22 X 5.5MM X 4.66 X 1G
EXHAUST PV4372HP-C 1.06 X 5.5MM X 4.56 X 1G
ENGINE CODE F-23A A4-A5-A7-VTEC
INTAKE PV4573 1.33 X 5.5 M X 4.56 X 1G
INTAKE P4378HP-C 1.37 X 5.5MM X 4.56 X 1G
Not worried yet ;D
I may still have another cheaper route. ;D
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Bump because, while neither Russ nor I give a shit, Staley Dan is whining about this to me basically all the goddamn time.
FYI F22/F23 intakes are 34mm, but 2.5mm short.
i lol'd
well played sir
Subaru valves are longer, slightly thicker, and 32mm. Make it happen.
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Bump because, while neither Russ nor I give a shit, Staley Dan is whining about this to me basically all the goddamn time.
FYI F22/F23 intakes are 34mm, but 2.5mm short.
i lol'd
well played sir
Subaru valves are longer, slightly thicker, and 32mm. Make it happen.
I was find those to be too thick.
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How thick? Guide sizes can be manipulated, although it gets to be pricey.
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What is the installed height on D16 springs? Diameter where retainer sits?
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O K
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Give me some dimensions. Dumbestic valvetrain parts are listed by dimension.
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How thick? Guide sizes can be manipulated, although it gets to be pricey.
D16=>5.5mm
Subaru=>8.0mm I only have listings of 76 to 05 and not all of the EJ family. :-\
VOLKSWAGON 86-92 2109CC
INTAKE P3467 1.57 X 8MM X 4.81 X 3G <--- too many grooves and too big of valves
EXHAUST P3466 1.33 X 9MM X 4.83 X 3G <--- too many grooves and too big of valves
PONTIAC 77-80 151 CC (ironduke w/ non- crossflow heads)
IN 79-80 P3063 1.72 X 11/32 X 4.66 X 2G <--- too many grooves and too big of valves but usually super cheap.
EX 79-80 P3367 1.50 X 11/32 X 4.62 X 2G <--- too many grooves and too big of valves but usually super cheap.
OLDSMOBILE 75-82 260 C.I.
EXHAUST P2946 1.30 X 11/32 X 4.68 X 1G <-- a little too big
OLDSMOBILE 80-90 307 C.I.
INTAKE P3205 1.75 X 11/32 X 4.66 X 1G
EXHAUST P2993 1.50 X 11/32 X 4.68 X 1G
There is a lot Olds engines that have the right length valves and single groove on the stems.
The stem dia. are around 8 to 9mm and have 1.5" to 2.0" heads.
Which would not fit very well in 4-valve D-series heads.
NISSAN 82-83 1488CC
INTAKE P3279 1.45 X 7MM X 4.67 X 1G <-- Possibly a good candidate if you modify valve guides
EXHAUST P3278 1.18 X 7MM X 4.64 X 1G <-- Possibly a good candidate if you modify valve guides
NISSAN 83-84 1488CC Turbo
INTAKE P3280 1.45 X 7MM X 4.70 X 1G <-- Possibly a good candidate if you modify valve guides
EXHAUST P3297 1.22 X 7MM X 4.71 X 1G <-- Possibly a good candidate if you modify valve guides
MAZDA 94-04 2994 CC Ford Built
INTAKE 94-99 P3485 1.66 X 8MM X 4.610 X 3G <-- a little short and the head are a bit big.
INTAKE 00-04 PV4598 1.66 X 7MM X 4.630 X 3G <-- a little short and the head are a bit big.
EXHAUST 00-04 PV4599 1.37 X 7MM X 4.610 X 3G <-- a little tall and the head are a bit big.
EXHAUST 94-99 P3484 1.37 X 8MM X 4.610 X 3G <-- a little tall and the head are a bit big.
GM 85-88 1.0 L Sprint
INTAKE P3808 1.41 X 7MM X 4.55 X 1G <-- a little short and the head are a bit big.
EXHAUST P3807 1.18 X 7MM X 4.51 X 1G <-- a little tall but a possible candidate
GM 83-86 2.0L Brazillian built (Opel)
INTAKE P3175 1.60 X 8MM X 4.70 X 1G<-- Possibly a good candidate if you modify valve guides
EXHAUST P3174 1.37 X 8MM X 4.72 X 1G<-- Possibly a good candidate if you modify valve guides
I have no spring install height ATM but I can dig up some later. ;D
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You know, the idea I had about machining down F22/F23 valves that Staley Dan stole from me before I came up with it might be the way to fly. If you pay close attention to coil bind vs cam lift vs seat pressure, or hell knock a tenth out of the spring seat on the top of the head, it makes a lot of sense.
You may all thank me now, starting with Staleard.
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You know, the idea I had about machining down F22/F23 valves that Staley Dan stole from me before I came up with it might be the way to fly. If you pay close attention to coil bind vs cam lift vs seat pressure, or hell knock a tenth out of the spring seat on the top of the head, it makes a lot of sense.
You may all thank me now, starting with Staleard.
How does this address the 2.54mm shortness in respect of the rocker to valve geometry? :-\
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Boo hoo it rattles?
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BOO HOO IT RATTLES!!!!! :'( :'( :'( :'( :'( :'( :'( :'( :'(
http://www.rdvalvespring.com/lash.html (http://www.rdvalvespring.com/lash.html)
http://www.nolimitmotorsport.com/supertech/cam-followers.html (http://www.nolimitmotorsport.com/supertech/cam-followers.html)
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Or homemade lash screws. Stick longer lash screw in the same vice drill valve grinder and grind it roundish and smooth.
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2.34 you never do any of this.
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I may at some point in order to make the point that free (or cheap) is a quality overcoming many faults, which was the original premise of hotrodding back when Men made their own shit and there was no Summit catalog.
Right now, $13 os so per valve is damn attractive.