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> More /6 piston and cylinder questions, Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahhhhhhhhhhh!
Dr Evil
post Jan 19 2008, 07:04 PM
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OK, so now the question is, what piston do I need? The other 5 original cylinders to the engine say KS, are alusil, are height group 6 and size 0. The one that broke, and was from a different set, was a Mahle piston with a mahle cylinder. this is causing me issues as I do not know what compression ratio piston I need for my 1973.5 2.7L US engine. The two that this one guy is offering me are 90202 or 90208. Which should I take? He also said that a 1973.5 /6 was a 2.4 CIS engine. I think that is incorrect as I have never seen such a beast. MFI yes, CIS no.
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sixnotfour
post Jan 19 2008, 07:36 PM
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QUOTE
1973.5 /6 was a 2.4 CIS

true statement
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Dr Evil
post Jan 19 2008, 07:40 PM
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Lernt something today. I am pretty sure it is a 2.7, though and I still need the answer to my question about what piston to get from him. Any ideas, Jeff?
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sixnotfour
post Jan 19 2008, 07:50 PM
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90208 KS 2.7
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Dr Evil
post Jan 19 2008, 07:51 PM
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As always, thanks for your continued help (IMG:style_emoticons/default/biggrin.gif) You da man (IMG:style_emoticons/default/thumb3d.gif)
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degreeoff
post Jan 19 2008, 07:59 PM
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Hey Mike,

The 73.5 WAS a 2.4...I have one and it is a 2.4....it also has the 7R case (hence why I bought it)....
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Dr Evil
post Jan 19 2008, 08:19 PM
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2.4 WITH CIS? I know that the 2.7 started in 74, I got this engine from a 74, but some of the CIS bits are the earlier bits and why I think it is an early 2.7.
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sixnotfour
post Jan 19 2008, 08:31 PM
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73 had a split between MFI and CIS for the T model, hence 73.5 CIS 2.4
they had steel runner tubes
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Dr Evil
post Jan 19 2008, 08:35 PM
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Ah, I have the cast aluminum tubes. I do have an extra setup with the steel tubes.
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alpha434
post Jan 19 2008, 08:36 PM
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Another thread based on speculation.

It's not very important whether 73.5 was a 2.4 CIS if you have a cluster-fuched 2.7. Measure those things. If you hurry, and you have no calipers, you can buy some from FLAPs before they close.

GO GO GO!
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Dr Evil
post Jan 19 2008, 08:37 PM
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Feel free not to respond to my threads, alfalfa. (IMG:style_emoticons/default/dry.gif)
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Dr Evil
post Jan 19 2008, 08:39 PM
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What size were the jugs on the 2.4? I know I have 90mm which are the 2.7 so I am not worried about that. I was just wondering if I had the right CIS as well.
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sixnotfour
post Jan 19 2008, 08:41 PM
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check the PN on the fuel distributor.
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Dr Evil
post Jan 19 2008, 08:43 PM
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The p/n is right. I found the size for 2.4 as well, 86mm.
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sixnotfour
post Jan 19 2008, 08:53 PM
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84mm
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Dr Evil
post Jan 19 2008, 09:03 PM
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Strike!

Hey Jeff, would I be correct in thinking that the number you recommended is the lower CR 8:1 74 2.7 piston?
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sixnotfour
post Jan 19 2008, 09:22 PM
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Your right.
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