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New race A/C engine

4 pistons and a Prop

Well-known member
Just wondering if anyone has one yet. The superior airparts XP-400 SRE. 250 hp and only 310lbs, 4 cylinder, with millenium 2 cylinders, roller rockers 10:1 compression
The XP-400SRE Engine features:

High-performance racing pistons
Specially designed racing camshaft
Proprietary Electro Slag Remelt (ESR) crankshaft
Angle-head Millennium Cylinders™ with bigger valves for better breathing and better cooling
Build your own XP-400SRE at Superior’s XP-Engine Build Center

This motor has all kinds of potential in the airboat world
Of course the price is $34,000.00, but well worth it, if you take care of it you will have it the rest of youre life and probably someone elses, and the price to try to build a 4 cyl. to 250 hp, and stay reliable, to me priceless.
There is also a 220hp version (and others) that is normal compression and thousands of dollars cheaper.
 
I posted something about this engine a while back. I believe the parts are all new.
http://www.xp-series.com/index.asp?content=15

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That can't be.....how many times we been told them lycomings are 40 year old motors....with 40 year old parts....

Guess somebody forgot to tell the manufacturer :shock:
 
grant":bg0hbehs said:
That can't be.....how many times we been told them lycomings are 40 year old motors....with 40 year old parts....

Guess somebody forgot to tell the manufacturer :shock:

It's just 40 year old technology. :D
 
97/98 they phased out the SBC in production vehicles! Before that they tried the LT1 but that was a disaster! Can't say much about either other then the A/C motors and the SBC were awesome designs for their times it has taken around 50 years for both motors before something better came out in the industry! The true reason the A/C motor has not improved much or is so out dated is liability, certification procedures, lawyers and bureaucracy they have both served their purpose well for decades!
 
:shock: how much boost do you wanna put on a 10-1 motor?

as a matter of fact what is standard compression on most ac motors?
 
the small block chevy was born the same year i was ,an i seen a 1st gen moter built on the same premise as the ist one ever built kick the sh4t out of your ls motor boat at the poluted water race explain that thunder.simise baby
 
Whatever Plum the video sure does tell a different story and why was the driver so mad he was yelling at my driver HMMM you say he won the race but he was mad and yelling and yelling about money. I don't care and I have no interest in running either of you again accept at a sanctioned race where the loser gets eliminated. And only the winner moves on, just as Ted eliminated your buddy at the Sarno races.
 
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