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Thread: NEW 300XS upgrades
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11-10-2011, 11:54 PM #106Member
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Yes lower IAT makes power. Yes the engines rip when cold then they heat soak. we are working on cooling mods to be released soon.We can change air in our room 30 F. fooling the air temp sensor simply adds or subtracts fuel. this is an old school trick to fatten up a stock ecu but only a band aid. Proper mapping for all temps is the norm. we have a potentiometer wired in the air temp for simple quick adjustments to help for mapping. Like a lean rich knob on a 2.5. We then burn the proper map for the upgrade of an engine.
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11-11-2011, 12:03 AM #107Member
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Long and short of it yes....a bunch. Both the xs and x from 3 liter to 3.6 liter. We are having a blast and are happy to boast zero issues.. we have run a 300xs with 91 pump fuel 20.6 hrs wfo at 350 hp, all good. We are testing true bolt on 30 hp kits to 60 hp true blueprint engines kits with forged pistons. We have finally had luck with tuners.We are building them now. We recently raced a 300xs with 350 prop shaft hp afor 3 hrs wfo. all looking good. I am so exited to show you all and it will be soon. Stay tuned.
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11-11-2011, 12:23 AM #108Member
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Might think so but it is more complicated than it looks. Problem is nothing new in years of outboard racing. This x is just an awkward design to meet some criteria. it is all fixable.There is an enormous amount of water that is discharged out of the mid section that we re direct and send down to the gearbox that helps cool the gear case . When water is re routed and a different tuner is used the whole water think almost goes away. There now is hardley any water to injest even by the stock cowl.
Better yet our new cowling is done and has proper ram like a 300x...You guys will love this cowl.Sealed rear. Same design as an x. Thanks Mike Nass. If you want to get ram air results without spending a for a cowl add a cheaper a vent and redo the water system and problem gone. Run the new cowl and leave the engine stock. Either way we have it pretty dialed in.
In the last 3 months ,like i said below, we have 20 hrs wfo testing this cowl water deal. We are up to speed and will announce parts soon. You don't have to look to far...The 300x is awesome in design. I will be drag racing a 300 x in the future although it will be more like a 500x (-_-).
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11-11-2011, 12:28 AM #109Member
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[QUOTE=eagle670;2226701]Dave , any more news or pict to feed us with
For sure...coming soon. we are in final stages of a 344 tq 335 hp 300xs. This kicks the #$#% out of a stock x...we are pumped and it uses 4.5 gals per hr less, all bolt on.
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11-11-2011, 12:31 AM #110Member
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11-11-2011, 12:37 AM #111Member
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Hi Paul...That was fun talking about the old ama days. Hey i thought we would let you know we ran the promax without the compressor(unhooked belt) supplying air shop compressed air for supply. 20 hp gain all all through the curve. The baddest race engines in the future will be conventional injection.
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11-11-2011, 12:53 AM #112Screaming And Flying!
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How about if the compressor was way oversize and the injectors designed to cope with it?
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11-11-2011, 01:59 AM #113
[QUOTE=dave bush;2248491] Wow Mr Bush very impresive work!! And the motor your planning on racing 500XS Holy sheep shat.!! Sweet now I just need a bigger boat and bigger bank account. Comming soon. Maybe motor before boat. BTW any weight differances with any of these mods to the XS? I know Mikes Cowl should knock of some lbs what about any thing else? Also any plans on making a 15 or 16 incher work?
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11-11-2011, 07:13 AM #114Member
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Mercury 500x
[QUOTE=whipper;2248504] Thanks but will see. We are yet to find all the xs limits, maybe some of the parts might end up out your way . The xs program is very strong and reliable so far.we will race ( or try to) a Big block merc...starting as a 300x. We are deep into this in both pump gas and full blown drag race versions. Yes they are short
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11-16-2011, 09:23 PM #115
Just got two Mike Nass cowlings for my 300xs's. They are awesome! Outstanding job Mike Nass! Will post pics this weekend before and after when they are installed.
The guy is first class!
Dave keep up the good work talk to you soon!
Double Rigged
308 Skater w/400r’s
Over-Kill
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11-16-2011, 10:40 PM #116Member
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how much do they cost ?
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11-17-2011, 10:23 AM #117
You have to contact Dave Bush Racing. They are the sole distributor for them.
Double Rigged
308 Skater w/400r’s
Over-Kill
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11-17-2011, 12:19 PM #1185000 RPM
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Soon baby soon!!!!!!
Ok, I have purchased the phase one for my 21 bullet and it should be here today I hope and I will be running it this weekend in a tourney on the Big O this weekend I can't wait ( like a fat kid whith cake). I will post the results.
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11-17-2011, 02:00 PM #119Member
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300XS Level 1 kit ? did you go for the "toaster" intake ?
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11-17-2011, 03:09 PM #120
12" 3.?L is the same weight as a 15" 2.5.
XR2001 & XB2002