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BRK 88 For a new Generation

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kaldis12
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BRK 88 For a new Generation

Post by kaldis12 » Thu Jan 02, 2020 10:14 am

Got a new bigger project running along with the other one...

For this one we went with a BRK 88 with its 45mm stroker crankshaft.
About the cylinder, got a nice finish but it turns out that it has the same problems as the other BRK cylinders. Poor nicasil coating... it really likes to chip...
Ports have a nice finish but they are kinda out of symmetrical places.
Channels are bad, but correctable, boost channel is stupid...
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Last edited by kaldis12 on Sat Jan 18, 2020 2:10 pm, edited 1 time in total.
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kaldis12
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BRK 88 For a new Generation: Porting

Post by kaldis12 » Thu Jan 02, 2020 10:42 am

This cylinder has to go through porting of course.
Stock timings are 200 degree exhaust and 128 degree. Going for 200/130 because we have a bit higher revving exhaust. Want a bit higher, narrower powerband. Will be okay as now the transfers are higher than the boost by 2 degrees.
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New Channel outlay
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toratora
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BRK 88 For a new Generation

Post by toratora » Mon Jan 06, 2020 8:39 pm

BRK seems to be a notch up from the Airsal. How did your porting turn out?
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kaldis12
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Re: BRK 88 For a new Generation

Post by kaldis12 » Thu Jan 09, 2020 11:33 pm

Brk has a modular head, thats why its better. Nothing else.
Its still under porting, it will be done probably in the next weeks
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