Aluminum heads
 

So...

A friends brother... Who knows this guy... Who has a friend... That builds marine engines... Says that I shouldn't use aluminum heads in my engine that I'm building....

I'm building a 383 for my boat. My desire is to use these heads https://m.summitracing.com/parts/drt-127211

My friend says he's a knowledgeable guy... And says his guy thinks aluminum heads will warp in a mercruiser engine...

It's a 21 foot boat...

It's a closed cooling system...

Thoughts?

Tell him they were putting Aluminum Heads on Flathead Fords many, many years ago..:cool-smiley-011:

Ayuh,.... Many of Us are goin' to disagree with that guy,....

that's a Nice set of heads for a closed coolin' boat motor,....

The SHP's are Dart's answer to the low buck chinese heads out there. Why are they cheaper ? Simple...old technology. IE: Old port and comb chamber designs from years back.

Both are a lower cost solution for those that want to be able to tell people they have aluminum heads on there engines, and again, staying away from Chinese castings.

That said, yes, better performance than standard cast iron heads...but, for a few dollars more, there is much better performance available. $1100-$1200 assembled for pair. Profiler, Brodix IK, and Trick Flow to name a few.

Your friends- friend is warped

I have edelbrock aluminum heads on my 502,zero problems

300 hrs on AFR's no problem yet.

You need to tell your ex's cousin Jim Bob to put the crescent wrench down and back away from your motors.

Along with the left handed screwdriver.

In this case do you think that he'd be ok using assembled heads, or should he build/rebuild them from scratch like the rest of us have been doing?