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7 replies to this topic

#1 Gregg

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Posted 26 January 2004 - 12:47 PM

Where is the best place to look for a 3:9:1 differential to lower the gearing on my 86 XT GL (EA82 NA)? Also, what about pistons and/or cams to up my compression ratio?

#2 MilesFox

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Posted 26 January 2004 - 12:57 PM

remember that you will have to swap the entire transmission with the rear end to match gears. but also, a non turbo trans should already be a 3.9 gear. you can only have a different rear gear if you run your 4wd as a RWD, removing a front axle.

a non turbo mpfi should have 9.5 compression, the highest with stock pistons, you already have as high as they come stock, or swapping in other stocl parts.

#3 ShawnW

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Posted 26 January 2004 - 12:59 PM

I would tend to guess that the XT has a 3.7 in it, especially if its an automatic.

I think the 3.7 is more suited to street use personally but to each his own.

#4 Gregg

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Posted 26 January 2004 - 01:16 PM

So much for that idea.... back to searching the board for more mods. :mad:

#5 MilesFox

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Posted 26 January 2004 - 01:24 PM

so what exactly do you have in mind for mods?

#6 Gregg

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Posted 26 January 2004 - 01:43 PM

I just picked up a 2" catco cat, and once I pick up a new Y pipe, I will have my local shop finish my exhaust system (I already have a 2" muffler). After that, I was looking at a higher compression - maybe 10:1? I'm not big on turbocharging cars that weren't designed for it. I had also looked at flywheels and pully kits.

I don't neccessarily want a dragstrip car - I'd rather have more GT performance.

#7 Nug

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Posted 26 January 2004 - 01:51 PM

You realize, of course, that many of these cars came with turbo. True, the compression ratios are different, but this could be a complete bolt-on affair.

#8 Gregg

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Posted 26 January 2004 - 02:16 PM

Wouldn't the turbo choke on my 2" exhaust?




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