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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 11-15-2012, 01:40 PM   #21
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Originally Posted by Erat View Post
lol wut...

Where did you convert that? I think it can get as high as 115. But there is no true way to rate e85 on octane.
Time to slap yourself....

Iowa RFA

100% ethanol is ~115 octane, not e85.
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Old 11-15-2012, 01:43 PM   #22
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Ethanol has a different molecular compund than octane.

So i don't get it.
Maybe you should take a look at the definition of octane.....

All is is a measurement or reference for resistance to pre-ignition AKA stability of the fuel
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Old 11-15-2012, 01:46 PM   #23
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Would there be an advantage to using something like 10:1 if you were planning to run 110?
As a rule, if you can find MBT at your intended boost level, then you could take advantage of more compression. Pump gas cars typically cannot, but some specific race-gas fueled cars under certain conditions probably can.

Unless you're exclusively running on 110, though, don't bother.
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Old 11-15-2012, 02:46 PM   #24
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Originally Posted by Savington View Post
As a rule, if you can find MBT at your intended boost level, then you could take advantage of more compression. Pump gas cars typically cannot, but some specific race-gas fueled cars under certain conditions probably can.

Unless you're exclusively running on 110, though, don't bother.
85 octane.
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Old 11-15-2012, 02:49 PM   #25
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85% everclear
Fixed
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Old 11-16-2012, 02:37 PM   #26
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What I have done in the past was to have the machine shop hone the bore straight with a stiff hone, then build up the re-used oem piston skirt with shot/bead blasting. This creates a dimpled surface that will hold oil and will slightly build up the piston diameter so it will fit the bore properly. Hatch Engine Service does this for me locally, I'm sure that you could find a shop in your area that provides a similar service'

Also, be sure to properly clearance the end gap of the top ring; it'll likely need a little extra expansion room for high boost track/race applications
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