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Old 07-11-2018, 12:26 PM   #1
swedishK
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Join Date: Sep 2008
Location: Soldotna, Alaska
Default Penta 2.5L B21ft?

I might have a line on a cheap aq151 possibly two, and was wondering if Id run into any issues swapping the 2.5 block into my turbo kjet wagon. Ive seen b230 heads on 2.1 blocks, so Im assuming theyd go the other way as well? Will a mildly modified turbo kjet fuel system be adequate to keep up with 400 extra CCs? The motors have been sitting outside on a pallet for a bit, and will probably need a full rebuild. Is the extra displacement worth the effort?


Now Im unsure if theyre actually 2.5 blocks. One has a 531 head and the other has what appears to be a 405. Both single carb. I did not see any AQ designation on the ID tag by the starter, however both tags start with the prefix 250A.
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