| [ Total Views: 1962 | Total Replies: 22 | Thread Id: 51481 ] |
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 cram
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| posted on April 28th, 2006 at 08:35 AM |
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74 x 92 = ?
whats the cc?
has anyone tried this combo?
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PurpleT3
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| posted on April 28th, 2006 at 08:42 AM |
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That's 1582cc. Sound slike a strange combo, what motor has a 74mm bore?
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VWCOOL
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| posted on April 28th, 2006 at 08:45 AM |
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I think he means 92x74 - a 5mm 'stroker'...?
If so, might be better to investigate using 94mm pistons/barrels (same machining process) and keeping a standard forged 69mm crank (less cost,
complexity and quality issues) for a similar performance outcome
[ Edited on 27-4-2006 by VWCOOL ]
Pay your debts, CxxT
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cram
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| posted on April 28th, 2006 at 08:49 AM |
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74mm stroke x 92 mm bore
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cram
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| posted on April 28th, 2006 at 08:50 AM |
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or 92 mm bore X 74 mm stroke!
got it right that time!
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PurpleT3
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| posted on April 28th, 2006 at 08:51 AM |
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That's 1968cc.
Ain't nothin' like the wind in your hair.
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cram
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| posted on April 28th, 2006 at 08:52 AM |
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cheers
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 helbus
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| posted on April 28th, 2006 at 08:53 AM |
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What size does that give us?
| Quote: | Originally
posted by VWCOOL
I think he means 92x74 - a 5mm 'stroker'...?
If so, might be better to investigate using 94mm pistons/barrels (same machining process) and keeping a standard forged 69mm crank (less cost,
complexity and quality issues) for a similar performance outcome
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VWCOOL
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| posted on April 28th, 2006 at 08:59 AM |
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Not sure off the top of my head. Around 2-litre... 1968, 1998, 2016 and all those numbers you see now and then...
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PurpleT3
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| posted on April 28th, 2006 at 08:59 AM |
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94mm bore x 69mm stroke gives the good old 1916cc.
Ain't nothin' like the wind in your hair.
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cram
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| posted on April 28th, 2006 at 09:04 AM |
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just exploring options
I have a case and heads to take 92 mm P/C
no crank or P/C though....
74 mm crank shouldn't need clearencing and should just slip in
and its a little bit different !
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helbus
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| posted on April 28th, 2006 at 09:12 AM |
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What about 92 x 69mm?
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cram
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| posted on April 28th, 2006 at 09:45 AM |
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just starting to look into it...it'll be either
92 x 69 (1835) or 92 x 74 (1968)
need to buy a crank anyway!
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PurpleT3
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| posted on April 28th, 2006 at 12:08 PM |
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Keep in mind that depending on the case you use, a 74mm crank may require clearancing of the case.
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 Bizarre
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| posted on April 28th, 2006 at 12:17 PM |
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http://www.aircooled.net/gnrlsite/resource/specgeninfo/calcs.htm
here is an engine calc for these things
Futue te ipsum!!!
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66deluxe
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| posted on April 28th, 2006 at 03:51 PM |
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Don't think 76 and under stroke needed clearancing, as CB sell a drop in kit using a 76mm stroker.
This is my Volkswagen, there are many like it, but this one is mine. Without me my Volkswagen is useless, without my Volkswagen, I am useless.
61 Karmann Ghia 2110cc type1 w Los Panchito's
66 Deluxe Beetle 2270 type 4
10 Subaru WRX Impreza
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hellbugged
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| posted on April 28th, 2006 at 04:23 PM |
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| Quote: | Originally
posted by cram
just exploring options
I have a case and heads to take 92 mm P/C
no crank or P/C though....
74 mm crank shouldn't need clearencing and should just slip in
and its a little bit different !
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don't forget you could choose 90.5mm as well
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johny rotten
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| posted on April 28th, 2006 at 05:19 PM |
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| Quote: | Originally
posted by cram
whats the cc?
has anyone tried this combo?
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Plenty of have poeple have used this combination with great results, cost is the only downfall with a short stroke like a 74, there is no quality
issues , and to call a vw 74 stroker motor complex is just a croc of shit.thanks cool
:thumb
[ Edited on 28-4-2006 by johny rotten ]
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cram
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| posted on April 29th, 2006 at 07:33 PM |
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thanks for the feedback...
I like the stroker idea and have no problem with the 74 crank..it costs half way between a stock and the bigger strokes (76mm +)..
Anyway, I've been getting some quotes and cost of building a big vw does add up!!
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Euro_67
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| posted on April 30th, 2006 at 08:40 AM |
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92mm cylinders have a thinner wall thickness than 90.5 or 94. There have been the usual debates about the thinner cylinder wall causing the engine to
run too hot. 90.5 have the same size od where they fit in the case but thicker wall, so they would fit the case you have. then go a longer stroke to
make up the capacity. 90.5 X 74 is 1904cc. Rod penrose had some Cb cranks at good prices
http://forums.aussieveedubbers.com/viewtopic.php?tid=50225&page=1#pid467977
Or for an even bigger stroke and capacity at a little more cost and effort try these !
http://forums.aussieveedubbers.com/viewtopic.php?tid=48937#pid456167
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Bizarre
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| posted on April 30th, 2006 at 09:19 AM |
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Just to throw petrol
You can also use a cut down 94 to fit in a case machined for 90.5-92's.
yes - it makes it very thin down the bottom, but it is really only for seating. The heat is above the piston top, and in the head.
Rimco in the states do these. I know of several motors that run these in the states and one i regularly talk to (Ryan - SBO) has been around for
several years as a daily driver
Just another option
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Alex Holzl
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| posted on April 30th, 2006 at 09:23 AM |
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we built one many years ago and it was a good combo (Porsche style stroke and bore ) you can run 92s with total seal rings but thicker barrells can
only be better.:bounce
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Craig Torrens
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| posted on April 30th, 2006 at 07:56 PM |
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| Quote: | Originally
posted by Alex Holzl
(Porsche style stroke and bore ) better.:bounce
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Short stroke and BIG bore...................just like Porsche.
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