450-500 hp from 2-big shot plates

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mud racer · #1 Post by **mud racer** » Wed Oct 03, 2007 1:51 pm

ok, i need some help big race comming up next week ,mud racing,548 bbc 2-big shot plate 1-fuel cheater sol. and 1-.127 bottom outlet nitrous sol. im figuring jetting will need to be .080 jet in both nitrous side and .073 in both fuel flowwing through a .073 in flow tool at 5.5 to say 5.75 psi witch should put me around 460-480 hp any help,,,,please thanks

#2 Post by **John_Heard** » Wed Oct 03, 2007 3:55 pm

Have you ever sprayed that much before? Your tuneup is somewhat aggressive with that much stagger at 5.5lbs. It might be a bit lean depending on lots of factors, you might want to use some more fuel than that till you get a plug reading.

Setting the flowing fuel pressure using a .073 jet in the flow tool is not going to be quite the same as using the equivalent jet to what you're going to be spraying which would equal a 103 jet.

I know lots of people like to use that method, but I've yet to see how it's going to equal the flowing pressure of the combined jet area when flowing.

demented · #3 Post by **demented** » Wed Oct 03, 2007 6:59 pm

Also sounds like with one nitrous solenoid, using two .080 jets, your going to be close to max flow for that solenoid of not being too far and having the solenoid act as the restriction. I might be wrong but I think it's real close.

mud racer · #4 Post by **mud racer** » Wed Oct 03, 2007 7:21 pm

thanks for reply yes i hve sprayed that much the last system was a .136 nos and a .110 fuel at 10.5 psi it s an old top gun plate flowwed 1285 lbs per hour 450 plus hp shot but im having distubtion problems and yes i know that is a nore when spraying this much w/plate system.hopeing the 2 big shots one plate side to side and the other front to back like a cross plate my help w/dist,,

mud racer · #5 Post by **mud racer** » Wed Oct 03, 2007 7:35 pm

well on the nitrous sol, im thinking if a bottom outlet nos sol will feed say 4-.042 nitrous jets on one side of a pro-race fogger,wich is only .112 orfice i would think a .127 should feed 2-.080 close yes.. or is my thinking off..

demented · #6 Post by **demented** » Wed Oct 03, 2007 8:08 pm

First off, Top gun, oooofffff.... well, I'm not a fan of them. Could be the plate causing your distribution problems. Seen it before.

Second, Most top nitrous guys have a reservation about flowing anything bigger than set of four .037 jets thru those NOS solenoids. They say that they start to act as the restriction over that size. Thats why I said you might be maxed with two .080 jets.

mud racer · #7 Post by **mud racer** » Wed Oct 03, 2007 8:13 pm

the plates on of those 8 hole deals 4 nitrous and 4 fuel on each side of bars,,

mud racer · #8 Post by **mud racer** » Wed Oct 03, 2007 8:17 pm

im know a .157 trash can nitrous sol, would work better,,i just dont have the extra 200 bones to get on right now i do have a -6an y and an extra nos bottom out let sol. i could run 2 nos sol. wire them together,,

demented · #9 Post by **demented** » Wed Oct 03, 2007 8:26 pm

If anything I'd run it as a two stage. Two plates, four solenoids(2 Nitrous,2 Fuel). Thats alot of nitrous to pump in at one shot (480 hp) on a nitrous mud car (I run mud too.) Unless you have plenty of traction. Most of us don't though, so I would delay the second stage to about about 50 ft out of the hole.thats were you start to get your traction. ARC makes a nice timed delay relay thats adjust up to 1 sec after you hit the throttle.it can be adjusted in .1 sec intervals. It's about $33.00 from Jegs.

mud racer · #10 Post by **mud racer** » Wed Oct 03, 2007 8:31 pm

well my car the muddy toy hooks realy hard no traction problems here it runs 1.70 sec in 100ft and has run 2.12 in 150 ft i have nos time delay on car i had tryed 2 stage in past it runs faster on on big hit my 10" pro mod converter is realy tight ..

demented · #11 Post by **demented** » Wed Oct 03, 2007 8:38 pm

Sounds like you might need a looser convertor than more juice. But I have seen quite a few cars that ran faster with more of an initial shot of the line than they did with a two stage. Put the jets in and try it.

By the way have you checked out the MRA website.(mud racers assosiation) sign up if you haven't. http://mudracersassociation.com/
Check out the forum as well.

mud racer · #12 Post by **mud racer** » Wed Oct 03, 2007 9:21 pm

mra should help the sport what state do you race in.

mud racer · #13 Post by **mud racer** » Fri Oct 05, 2007 7:51 pm

ran that tune up tonite .078 nos and .073 fuel at 5.5 psi just a little fat fuel ring was about half way up porcilen ill go w/.080 or .082 in nos should clean up nicely...thanks guys..

demented · #14 Post by **demented** » Sat Oct 06, 2007 7:53 am

Great to hear it.

mra should help the sport what state do you race in.

I'm from upstate New York. I race everywhere. As far as ohio and as far south as virginia so far. Plan to do a little more travelin' but that depends on fuel prices. Where are you racing?

#15 Post by **John_Heard** » Sat Oct 06, 2007 7:58 am

Mud Racer you might be getting close to the restriction on that solenoid like Demented talked about, if you jet up on the nitrous side and it don't lean out any you'll know your about maxed out. Be real careful if you put a bigger or more solenoids on it with that jetting.

450-500 hp from 2-big shot plates

450-500 hp from 2-big shot plates

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