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Old 12-29-2004, 09:51 PM   #1
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crank!!!!!!!!

Just making sure all zetech builder's get a look at my crank.


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Old 12-29-2004, 10:25 PM   #2
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That looks pritty, But if you make big power or turn it hard it will break quicker than a plain stock crank

The counterweights help to balance the engines harmonics , As well as the engines rotating balance

Tom
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Old 12-30-2004, 06:56 AM   #3
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What's the strongest crankshaft that you can buy for the Zetec? And where could I buy one?
Also does anyone know what the price range is?

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Old 12-30-2004, 07:49 AM   #4
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I have spent the last 18 years of my life building race engines. Big power race engines!! That crank will hold up to more hourse power than that motor will ever make. It's not how wuch wieght you take out it's where you take it out!! I removed over %35 of the over all wieght from that crank without weakining it. In the case of this crank the harmonics is dependant apon the over all hieght of the counter wieght. But I'm sure that you already knew that. I have done these for sprint cars that produce over 350 hourse to the wheels at over 9500 rpm.
These motors go for lap after lap all season long. At the end of the season even the bearings show little or no wear. Any balance or harmonics problems would show in uneven bearing wear. As far as rotating balance goes you can take the crank itself down to a little bit of nothing for over all wieght and still maintain rotating balance to within = or - .002 grams.

The lightened shaft will free up extra horse power as I have proven on the dyno many times over. Along with faster throttle responce. I've done the same thing with IMCA late model cranks open wheels and drag cars. This next race season will prove the point soon enough!!

Last edited by crankman; 12-31-2004 at 07:37 AM.
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Old 12-30-2004, 08:15 AM   #5
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I have you by just a few years and im sure a few hundred engine builds , My main buisness is building engines (Precision Engines & Cyl Head Service)

There are many cranks out there that can be lightened and knifedged, This just isnt one of them ,I broke one of these cranks already in 2 places at 518HP at the wheels and 6000RPM , As im sure you know more RPM adds more stress to the crank, This engine already has major harmonic issues , But again im sure you have tested this before causing more harmonic issues

Even the billet steel cranks that the counterweights were takin down on broke , and the crank had to be built with added counterweights to help combat the harmonic issues

And you have built how many Zetec engines

Im sure if he only goes for 300HP at the wheels and keeps it under 6800 to 7000 he will never have an issue with it , Then the question is, Why do that for 300HP or under

Even Nascar has dropped doing this

The Zetec crank isnt in oil like alot of engines and we have an almost perfect windage tray

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Old 12-30-2004, 08:19 AM   #6
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Quote:
Originally posted by crankman
The lightened shaft will free up extra horse power as I have proven on the dyno many times over. Along with faster throttle responce.
Ok with all that is removed you lightened it how much 1LB to 1,5 LB?

How mauch do you charge for this?

In your opinion how much HP does each pound off the crank add in HP?

Tom
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Old 12-30-2004, 11:14 AM   #7
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I have had great luck doing this for a long time. Look at the crank and tell me how much I took off. As far as for breaking cranks I have not had a problem with that. I to work at a speed shop and all I do is cranks and rotating assemblies. IMCA is still doing it and for the last four years years I have not broke A a shaft and I have done ALOT of them. We wil know how much horse power differance there is when we dyno the motor. I think that anywhere around 300 HP without any power adders NOS etc. would be pretty good.

Last edited by crankman; 12-30-2004 at 11:47 AM.
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Old 12-30-2004, 11:30 AM   #8
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i'd like to see the dyno numbers myself. also, the longevity. besides being a big pissing match thread, this is good stuff to learn guys.
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Old 12-30-2004, 11:35 AM   #9
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I'm not tring to have a pissing match. Were just going a different route in tring to reach the same goal. thats the fun of it.

Last edited by crankman; 12-30-2004 at 11:57 AM.
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Old 12-30-2004, 12:10 PM   #10
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As far as a cost?? I have not really thought about it. I did this as a gift to drillteamleader. This motor is just for the 2005 race season. We're starting another one. We just wonted to get to the track to test some things with this car first.
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