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Old 06-04-2003, 12:13 PM   #1
seven881
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Default Turbo sizing for EJ22T hybrid help

ok, swaps all done and I'm going to be putting a WRX stocker on it for a little while to work out the turbo bugs without pushing the engine to hard. How do I calculate the ideal CFM for the engine? It's a stock EJ22T with stock 2.5 SOHC heads and the SOHC head gaskets. That's roughly a 7.7:1 compression ratio. I'm using a link plus and I'll be getting it professional tuned when it goes in. I'd like to get a balance between top end and as little lag a possible. My budget is about 1K and I can use turbo's designed for the WRX since I'll be using WRX plumbing.

I liked the idea of using the 16G that's popped up lately and converting it to a 18G or 20G down the road after the stroker or build up goes in. What do yall think?
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Old 06-04-2003, 01:24 PM   #2
dyswtric27
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a little off topic and maybe this has been discussed before, but are you sure the CR of your motor is 7.7:1, i was thinking that with the ej22t and SOHC heads and gasket it was around the low 9's. I may be totally off.

As for turbo, it might be good to let us know what injectors you plan on running and how much hp you want to get?

Jason
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Old 06-04-2003, 01:44 PM   #3
seven881
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Compression Ration Link
http://wac.addr.com/auto/obs/turbo/ejcalcs.html

I was under the assumption that injector size was dependant upon the characteristics of the turbo, but if not I'd like to stay around 550 - 650. That should be plenty for the stock motor. I can use WRX style intectors with my setup, so PE's would work.

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Originally posted by dyswtric27
a little off topic and maybe this has been discussed before, but are you sure the CR of your motor is 7.7:1, i was thinking that with the ej22t and SOHC heads and gasket it was around the low 9's. I may be totally off.

As for turbo, it might be good to let us know what injectors you plan on running and how much hp you want to get?

Jason
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Old 06-04-2003, 02:25 PM   #4
dyswtric27
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Thanks for that link. Very helpful actually.

This may help in terms of cfm calculations and then you can use a previous post in this forum for what the turbos flow.

CFM calc
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Old 06-04-2003, 03:12 PM   #5
seven881
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That link you posted was helpful as well. Time to bust out the calculator.

Thanks
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