Muckman’s High Compression Super Build

Muckman

Not a M0derator
Thanks guys. Nick here are my results from the compression testing.

Muckman @ Honda-Tech said:
OK well this year was a complete bust for me. I wasn't able to get the new engine together before the end of the season so now I've decided to sell it because I want to pursue the high compression build again. So before I pulled the new engine I wanted to do a comparison between the 9:1 and the 13.5:1 compressions.

I had planned on testing at 5 pressure points (0, 5, 10, 15 and 20psi) but only made it to 5psi when my FPR decided to stop adding fuel pressure - Probably from sitting in Ethanol unused all year.

This is not exactly a scientific test but its pretty close considering everything else is the same - head, cams, fuel, turbo, manifolds. The weather differences between July and November are drastic and I tried to correct the data but the dyno software wouldn't let me overlay two runs with two different correction factors so I left them both uncorrected. If corrected the low compression numbers would come down 6% while the high compression numbers would stay the same thus increasing the compression gains.





At 0psi the uncorrected dyno numbers show a 21.6% increase from 9 to 13.5:1
At 5.5psi the uncorrected dyno numbers show a 15.7% increase from 9 to 13.5:1

I did this test just for fun in the name of science!
Click to expand...
 

Nick_C78

New Member
That is a pretty significant gain. The power is there almost instantly as well. That dart head seems to flow very nicely. I also like how your curve isn't all shoppy looking, but the ratios are pretty far apart, but it still looks smooth.
 

Nick_C78

New Member
You must have learned that by watching youtube videos, you backyard mechanic you. Sorry, couldn't resist.

So whats next?
 

Muckman

Not a M0derator
What's next is starting over with a fresh block. The goal is the same as before. I've proven high compression and boost are successful but I'm plagued by engine assembly errors. This time I believe we didn't have enough p2h clearance which became apparent once we pushed the motor past 9k and things stretched enough to contact and squish oil clearances. Expensive lesson but try again.
 

Nick_C78

New Member
Innovation is never easy or cheap. Just think how many people are going to copy you once you have it all right. It is going to be a very competitive set up.
 


Muckman

Not a M0derator
Here are pictures of the damage.

Shrapnel punctured the oil pan around the base.



Here’s the windage tray. Almost bullet proof.



New window in block



Nope, definitely not fixable.



When the rod smashed the bottom of the sleeve it crushed the water jacket too. I drained all of my coolant through my oil pan. It was convenient actually.



Rod cap floating around in oil pan next to bearing roll up





Money shot






 

Nick_C78

New Member
Little duct tape and some polishing will clean that right up man.

That is a badge of honor though. I would mount that rod on the wall lol
 
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