Thanks ole buddy Dan.
It Aint Over Until I Win
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| Engine measurements https://www.slantsix.org/forum/viewtopic.php?t=39186 |
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| Author: | Ron Parker [ Tue Mar 02, 2010 3:25 pm ] |
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Thanks ole buddy Dan. It Aint Over Until I Win |
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| Author: | Rammingspeed [ Sat Apr 10, 2010 7:02 pm ] |
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I just picked up a 71 225 and 904 transmission off craigslist for $25. That is not a typo $25 and he loaded them into my truck. LOL |
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| Author: | crash922108 [ Wed Apr 14, 2010 4:50 pm ] |
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I just love off the wall swaps like this  C'mon rammingspeed keep us updated on the build, don't leave me hangin!!
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| Author: | Rammingspeed [ Sat Apr 17, 2010 5:30 pm ] |
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Right now I am going over different parts combos. If I use 2.2 turbo pistons and stock 6.7" rods I am estimating the pistons will be about .315-.331 below the deck. Stock builds average about .140 with a CR of 8.4:1. I think this will put me at or just below 8:1 CR, which is what I am looking for. Any corrections would be appreciated |
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| Author: | Joshie225 [ Sat Apr 17, 2010 7:04 pm ] |
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Quote: Right now I am going over different parts combos.
Most stock 225s have the pistons about .180-.190" below deck and have a true compression ratio of 8.0:1 or less. If you use a shorter piston you need to use a longer rod to have a reasonable compression ratio. The primary reason for using the 2.2 pistons is to allow the longer rods without resorting to custom pistons.
If I use 2.2 turbo pistons and stock 6.7" rods I am estimating the pistons will be about .315-.331 below the deck. Stock builds average about .140 with a CR of 8.4:1. I think this will put me at or just below 8:1 CR, which is what I am looking for. Any corrections would be appreciated |
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| Author: | Rammingspeed [ Sat Apr 17, 2010 8:57 pm ] |
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Thanks for the info. I guess I'll shave the deck to get closer to 8:1. I don't think rods that are .3" longer will make enough difference to justify their cost. |
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| Author: | Joshie225 [ Sat Apr 17, 2010 9:28 pm ] |
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Why not use stock replacement pistons? You want a stock compression ratio after all. |
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| Author: | Rammingspeed [ Sun Apr 18, 2010 8:58 am ] |
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Will they hold up to boost as well as the 2.2's? |
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| Author: | emsvitil [ Sun Apr 18, 2010 2:10 pm ] |
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For boost, you'll want a forged piston.......... |
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| Author: | Rammingspeed [ Sun Apr 18, 2010 3:24 pm ] |
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There are quite a few people on the turbo dodge forum running the cast pistons at 18+ psi. I would agree that forged pistons are the strongest but I'll probably only run about 15 psi on this motor. I plan on spending the bulk of my budget on intercooling. |
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| Author: | 2 Darts [ Mon Apr 19, 2010 8:53 am ] |
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The Crossfire is heavily based on the previous generation SLK Benz. The powertrain is all Benz. That is part of why the AT is so expensive to rebuild. If there is a more complicated way to do it, Daimler Benz will find it. lol. No aftermarket support for the 3.2? For body stuff for the Crossfire I agree. For the powertrain, I have to strenously disagree. AMG? If you don't want to go Afalterbach, try Renntech. http://www.renntechmercedes.com/slk_170.php IMHO going from a modern V-6 to the 40 year old design /6 is a step backwards. I suggest looking for a shop that will let you send in your AT as a core and ship you a fresh AT for a fee. The tranny has been used across model lines so it should be easier to find than an AL /6, for instance. Good luck to you in Huntspatch. |
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| Author: | Rammingspeed [ Mon Apr 19, 2010 3:27 pm ] |
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That doesn't sound like any fun at all.  
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