150hp Black maxs heads

[ofna2005]

Guy I have gotten my hands on some 150 heads . Will they work on my 2.4 /200hp? Will they help with the performance of the motor? What would be the diference between these versus ordering a set from a reputable machine shop? sorry for all the questions, just trying to learn about the heads and the compression aspect of the motor . Thanks

[TEXAS20225]

you tried putting them on that 2.4 yet????????????????????? got a measuring tape

[ofna2005]

No not yet . Just picked them up still debating what to do with them .

[terry taylor]

No not yet . Just picked them up still debating what to do with them . Maybe measure them.

[ChrisCarsonMarine]

If they are outside pattern head bolt style 2.0 heads they are a bolt on 140-145 lbs compression for your outside pattern 2.4.Inside pattern 2.0 and 2.4 will not have the same bolt pattern,Chris

[ofna2005]

Hey thanks for the information . Will 140-145lbs compression be enough change to notice any performance differences?

[ChrisCarsonMarine]

Very noticeable,and about all you can safely run on pump premium,be sure the motor can turn at least 6000 rpms,don't bog it down,Chris

[TEXAS20225]

The issue im talking about is that the 2.5 150 heads are about a 1/4 inch wider physically and they have to be cut down to fit a 2.4 or at least thats part of my experience if they are the 2.4 variety 1 or 2 pc heads no problem