V-TEC power, what do you think??? |
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V-TEC power, what do you think??? |
mattillac |
Dec 15 2004, 01:25 PM
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#1
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robots! Group: Members Posts: 536 Joined: 27-October 04 From: vallejo,ca Member No.: 3,020 |
anybody heard of a V-TEC conversion for the 914. KEP could probably come up with an adapter if he doesn't have one already. but, will a front drive motor work with a rear drive tranny? does the crankshaft spin in the same direction? anyone hear of any other front drive engine conversions? my 914 deserves more power than i can afford to get out of my type 4 motor. for the cost of nickies and upright cooling and head work, etc. i could have a turbo vtec setup.
fire away... (IMG:style_emoticons/default/ar15.gif) |
ClayPerrine |
Dec 16 2004, 04:13 PM
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#2
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Life's been good to me so far..... Group: Admin Posts: 15,502 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
I don't know if anyone has thought of this......
Spinning a 901 backwards will cause all sorts of weird failures. The transmission was designed to spin in one direction. Even if you flip the ring and pinion, the input and pinion shafts spin the same way. When you put a reverse rotation engine in with a 901, you spin all the innards in reverse. Therefore the oiling may not work, and the thrust bearings will be loaded in the opposite direction from the way they were designed. The thrust blocks and brake bands in the syncros were designed wth a particualr spin direction. Quote from the factory manual " Due to its slanted tab, the thrust block exerts a pressure, through its longer end, against the inner face of the syncronizing ring. " This implies that the syncros are designed to run in one direction only. And when you spin the trans the other direction, the helical cut pinion gear climbs up the ring gear in the opposite direction. Therefore it will push against the back of the intermediate plate, instead of pulling against the front of it. That means that all the power of the engine is pushing against the bearing retainer plate. Yes, I know this happens in reverse, but you dont' run for hours at 3K rpm in reverse. At best you may get to 500 rpm on the pinion shaft for a minute or two when in reverse. And last but not least, your speedo is driven off the pinion shaft, so it's going to run backwards, counting down the miles, instead of counting them up. (IMG:style_emoticons/default/biggrin.gif) I am not trying to rain on your parade, but I think that you are inviting failure if you reverse the rotation of a 901 gearbox. |
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