Question on compression?

General engine questions/issues that aren't specific to the other categories
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Question on compression?

By dro21
- Fri Apr 23, 2010 3:59 am #189449 ok say you have a engine and you rebuild it for higher compression and say your compression is around 11.40:1 would you need to run higher octane gas and what are the differeance's of having this compression compared to stock compression e.i.(mpg,and other stuff)
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By forcefedEG
- Fri Apr 23, 2010 1:47 pm #189530 higher octane is a good idea, stock vtec engines recomend high test from the factory anyway, at least b series cars... honestly if its tuned your mileage should not really be affected majorly... you will notice a slight power increase as well, compression makes power... but you will see more of a difference going form say 8.5:1 to 11.5:1 than if you go from 10:1 to 11.5:1... it wouldnt hurt to upgrade to bigger injectors and a bigger fuel pump depending on your engine and its displacement... hope this helps :thumb:
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By dro21
- Fri Apr 23, 2010 10:35 pm #189650 Ok thx.....i might be getting a b18a and i found a allmotor high compresion kit.thats why i ask
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