Whats your preference for tunning up 86 325es or 88is - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 08-31-2009, 08:53 PM
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Cool Whats your preference for tunning up 86 325es or 88is

This is my dilima wanting to drop some $$$$ on my car for such things as rebuilding and turboing and looking for around 300 to 425hp.

I have an 86 es motor that i could rebuild but i also can pick up an 88is motor for really cheap the ? is witch one has more potrntial?

Ok so i know that people tend to take the b25 head and put it with the b27 block witch ive heared u end up with any thing from around 170 to 190hp.

The b27 motor also has a lower CR than the b25 and has an even lower CR after switching out the heads but when looking to turbo a car isnt that what u want a lower CR?

Know on the other hand the b25 motor has a higher rev limit witch tends to tell me that it might be more suitable for the power gain that im looking for.

Any suggestions or thoughts please!!!! Thanks!
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#2 (permalink) Old 09-05-2009, 06:55 PM
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You might want to look for a m50 or s50 for that kind of gains.

1986 bmw 325e with a 88is swap
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#3 (permalink) Old 09-05-2009, 07:38 PM
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the 'is motor will easily put down 400hp on stock internals with the right tuning.

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