Jet size help
I am installing an hfs-4 system. I'd like help validating my jet selection. It's a 4 cylinder engine running 850cc injectors (one per cylinder) and I'll run up to 22psi boost. What jet(s) should I use? I decoded the graph chart in the materials that came with the unit, and the jets it suggest seem bigger than most people seem to be running.... Of course this motor does make a lot of power...
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Re: Jet size help
What type of fluid will you inject?
In rough terms, for 100% meth 25% = 850cc jetting 50/50 = 680cc of jetting |
Re: Jet size help
I'll start with water but then planning for 50/50. Based on the chart, would I be in the right ballpark with two jets one .7 and one .8?
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Re: Jet size help
I'll start with water but then planning for 50/50. Based on the chart, would I be in the right ballpark with two jets one .7 and one .8? And the largest restrictor....
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Re: Jet size help
For 100% water I'd run 1 jet, somewhere from .8mm to 1.0mm. After the move to 50/50 you can run more jetting.
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Re: Jet size help
I must be reading the chart wrong. Once I go to 50/50, would a .7 and .8 be too much still?
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Re: Jet size help
A .7 is only 300cc or so. for 50/50 we usually jet at 20% of injectors or:
850 x 4 x .20 = 680cc |
Re: Jet size help
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Re: Jet size help
Yes. That is correct.
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