Just wanting to check that my engine is ok to turbo took it apart today after headgasket went can anyone tell me what compression ratio this engine is ? Also the pistons are dished down wards are these standard pistons, piston 230 0987 83.98
Engine block numer-1278 821 205 87
Head number-1705 885
Engine numbers , compression ration ? Ok to turbo ?
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kam-325i
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What size engine.....
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Grrrmachine
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Most of the info, such as compression and pistons, is in the Wiki:
http://www.e30zone.net/e30zonewiki/inde ... 20#Pistons
http://www.e30zone.net/e30zonewiki/inde ... 20#Pistons
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shane281189
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Cheers I looked I'm still confused tho the number has 27 at the beginning would that mean its a 2.7 ?
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hongkongfuey
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Look on block inlet side next to engine mount. Should say something like 625e or k . E is early engine higher comp k is later engines lower comp. And on the head it will say2.5/2.7 for a 325 head
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shane281189
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It's a "e" 
what to do ......
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HairyScreech
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sell it and buy a K or just do it anyway, unless it is an e1 then it will still be below 10:1
2.8 development thread http://www.e30zone.net/modules.php?name ... c&t=170822
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ross2009
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ive already told you all this shane
the pistons from a high comp and low comp look identical there both dished with 2 valve cut outs you have to measure the depth of the dish to find out which one is which theres 1.1 mm difference from either piston the cr of your engine is 9.4-1 which is to high for boost
unless you know they came from a late cat 25 6k engine which is 8.8-1
the pistons from a high comp and low comp look identical there both dished with 2 valve cut outs you have to measure the depth of the dish to find out which one is which theres 1.1 mm difference from either piston the cr of your engine is 9.4-1 which is to high for boost
unless you know they came from a late cat 25 6k engine which is 8.8-1
