 will a 77mm x 96mm combo work?, engien rebuils for 2. |
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| bernbomb914 |
 Oct 6 2003, 06:23 PM
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#1
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one of the oldest Farts on this board  Group: Benefactors Posts: 1,873 Joined: 29-December 02 From: Temecula, CA Member No.: 36   |
want an easy to assemble daily driver that will run cool. I need cam suggestions and compression ratios
looking for around 140-150 hp. What do you think Bernie (IMG:style_emoticons/default/driving.gif) |
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| Charles Deutsch |
Oct 6 2003, 06:35 PM
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#2
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Unregistered |
I'm planning to build a 96 x 78 mm motor with 42 x 36 mm heads from HeadFlowMasters. I've been told that 9:1 c/r is about right for running this motor on 89 octane gas. Right now, my WAG is that this motor will produce 125 - 130 hp.
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| Jake Raby |
Oct 6 2003, 07:03 PM
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#3
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
My 2270 (78.4 x 96) is good for 145BHP at a MINIMUM. Smooth idle at 800 RPM and power everywhere.....
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| ChrisReale |
Oct 6 2003, 08:24 PM
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#4
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Sleazy Group: Members Posts: 2,665 Joined: 20-January 03 From: San Francisco Member No.: 176 |
QUOTE(Charles Deutsch @ Oct 6 2003, 05:35 PM) I'm planning to build a 96 x 78 mm motor with 42 x 36 mm heads from HeadFlowMasters. I've been told that 9:1 c/r is about right for running this motor on 89 octane gas. Right now, my WAG is that this motor will produce 125 - 130 hp. I'm curious how you think you can run 89 octane gas on a 9:1 comp engine? (sorry if that sounds like a smart ass question, im really curious) because my 914 has 8:1 comp and it calls for 92 , and my subaru has a comp ratio of 9;1 and it needs the 92 octane stuff as well....... (IMG:style_emoticons/default/confused24.gif) |
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| Charles Deutsch |
Oct 6 2003, 08:34 PM
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#5
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Chris,
Check out this thread http://www.914world.com/bbs2/index.php?act...=0&hl=89+octane . And remember, the European 1.8s ran 8.6:1 c/r stock. |
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| ChrisReale |
Oct 6 2003, 08:38 PM
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#6
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Sleazy Group: Members Posts: 2,665 Joined: 20-January 03 From: San Francisco Member No.: 176 |
I see.... (IMG:style_emoticons/default/smile.gif)
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| bernbomb914 |
Oct 6 2003, 11:47 PM
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#7
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one of the oldest Farts on this board Group: Benefactors Posts: 1,873 Joined: 29-December 02 From: Temecula, CA Member No.: 36 |
does anyone have a good suggestion for the choice of rods and cam. I have been told that the stock 2/0 rods would work. Cams are a mystery and are full of black art as to what is best. I would like to be on the cutting edge with these parts
Bernie / |
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| Charles Deutsch |
Oct 7 2003, 12:17 AM
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#8
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Unregistered |
There's lots of info on the aircooled.net site about this. I figure I'll be using the Scat 4340 T-1, 5.394", H-beam rods since aircooled.net says these are good for engines with stroke up to 84 mm and the H-beam rods require less clearancing. As for cams, I'm probably going to buy an off the shelf Webcam since I don't know nearly enough to "design" one on my own. I'll probably use the Webcam 86a. I have the "Performance Engines" book from Hot VWs coming that supposedly contains a chapter on building high-performance T-4 motors so I'll probably refine my choices more after I read it.
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| Mark Henry |
Oct 7 2003, 05:14 AM
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#9
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Stay away from the stock rods on a stroker, go with T1 style rods. 86a or the split duration Web cam. 8.5 to 9.0:1 CR, Schedak (sp?) or Berg T1 26mm oil pump, T1 oil pressure spring, dual thrust cam bearings (the copper coated ones if you can find them) and have the whole deal balanced.
Spend the coin on good head work, 44mm X 38mm Manley or SSI stainless valves. (IMG:style_emoticons/default/smash.gif) |
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| banderson |
Oct 7 2003, 06:35 AM
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#10
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Member Group: Members Posts: 88 Joined: 22-August 03 From: Massachusetts Member No.: 1,064 |
Why 77mm stroke? 78 or 78.4 fits fine with T1 rods mentioned above (clearanced) and a reduced base circle cam. I probably have .030 between my cam and my rods.
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| bernbomb914 |
Oct 7 2003, 04:05 PM
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#11
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one of the oldest Farts on this board Group: Benefactors Posts: 1,873 Joined: 29-December 02 From: Temecula, CA Member No.: 36 |
what web cam# is the split duration? It is not on there web page. I would like to run it if it is avalible
Bernie |
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