View Full Version : Cure for Mav
Hey Rick Book, just a thought. If your Mav runs like "crap" just install a "toilet" and run some "alky". :clap: Latest mod to Mavman's 351W. Have not tested yet but from a little tuning in the shop, the throttle response is awesome compared to 112 petrol.
BTW if you get ready to bite the bullet, call James Monroe. He knows more about these things than Ron's does, and will go out of his way to answer any questions you might have. Heck, he's even called me at 8 or 9 pm to make sure there wasn't any problems I was running into, and even shipped a crank mandrel to me for free because Ron's screwed up the order to begin with. Helluva guy that James is.
LOL @ pun.
I'll admit, I've never seen one of 'em 'ar thangs. :eek:
I'll keep this in mind ... if my Holley Systemax intake ever craps out on me. ;)
That looks sweet sitting on top of that engine........what kind of fuel system does a setup like that require?
Being Mavman is still in bed, I will give what I know about the system. Mount the flying toilet(is like a throttle body) drill the manifold for the eight nozzles. Mount the belt drive fuel pump down low on the engine and replace the crank balancer bolt with a belt drive mandrel. Must use a smaller fuel cell located usually next to the radiator support, must run lines to the pump and toilet valve and also must have a return line to the cell. Can have many variations of the above but basically is a fuel injection type setup. Also must run a shutoff cable to the drivers compartment to shut off fuel flow and more importantly, to lean out the flow for idling and slow rpm driving. Alcohol will contaminate the oil badly and must keep it changed quite often. Some use a vacumm pump also to help rid the crankcase of the contamination for less oil changes. There are different size nozzle inserts for tuning and also a dohickey called a pill, that is similiar to metering jet, in the distribution valve on the toilet. Is not as complicated as it looks or sounds but takes a lot of study and help to get it right. I think he got the whole thing off ebay for about half of the cost of a new one. I have heard the toilet alone sells for 15 to 16 hundred alone, new. This old guy will have to stick with the Holley 750 on his tired old 302 in the Fairmont. Wonder if he will let me use his old dominater when I get the 331 put back together?? Will have to get Victor heads and manifold, new roller cam, and last but not least, a bank loan to pay for it.
holy hell. There really is no hope for you now.
That is a pretty serious set up.
guys, this thing is awesome...there is no other word. When you smack the loud pedal, you'd better be ready for lots of "go" because it is there INSTANTLY...WAAY quicker than the dominator ever was on it's best day. Sure, it uses about twice the fuel, but it's a race car and alky's cheaper than 110 gas by a long shot. I made a test-n-tune pass yesterday (got there late) and even with EGTs in the 800's (way rich) and way too much timing, still ran about .15 quicker than on gas, and the 60' was impressive as well at a 1.41--on a slick track. Ran a off-throttle 6.49/104 in the 1/8 and 8.57/108 1000' again, off the throttle just before the 1/8 mile due to a slight miss (too fat).
here's how it works...the nozzle jets are in the injectors and are like a coarse adjustment for mixture. They come in different sizes, mine are 33's. The "pill" is in the barrell valve and is the fine adjustment, like a holley jet. One allen screw, a spring, and use a toothpick to pull the pill out. You can change the mixture in about 30 seconds. The barrell valve also has a linkage from the butterfly (which by the way is 4" diameter and flows 1280 CFM) to the valve which is adjustable, by using a leakdown tester on the barrell valve. It's very similar to a sprint car's injector, except the throttle body is a single butterfly instead of individual 2 1/2" "stacks". Very simple, tons simpler than a Holley ever was, consistent, and very dependable. For you bracket racers, it's the only way to go...although it does require a little "potty training" from either Ron's injection or James Monroe, but once you figure out how it works, its so simple it's funny.
I have about $250 total invested in mine as of right now. I saw it listed on Ebay for $700 on a 10-day auction, so I almost immediately headed out to the scrap metal recycler and bought as much scrap as I could find...including 3 old Powerglide transmissions. I sold the gearsets from the 'glides for an average $125/each, the cases averaged $50/ea, and I also sold a couple motorcycle cylinders I had here already along with some hard-to-find powerglide internals. The $250 was spent on getting the crank mandrel, belt, nozzle jets, and pill set.
I think James sells a new Toilet kit for $1485 without primer. The primer system is a 1 gal. fuel cell with an injector in the manifold so you can idle around the pits on gas...which warms up the engine a LOT quicker than on alky. That was the biggest problem I had so far, the motor won't warm up. I had the electric water pump turned off, from starting at the pit stall to driving all the way back down the return road (including the actual run on the strip) and it never got over 190 degrees. As soon as I turned on the pump back at the pits, it dropped to 140 very quickly, and this is why the oil gets milky. Its not the alky that milks the oil, but the fuel itself draws moisture like a sponge...and when the alky's in the oil, it pulls the moisture from the air right into the oil which milks it down.
Great info! (and great numbers)
Sounds like your hooked. :thumbsup:
What kind of compression you running mavman? Is it the same what you run with 110 race gas or can you bump up some?
compression is a true 14.2:1.
Yes, it's the same motor as I ran with the 110 gas. No changes, other than just adding the potty injector. The time run I did the other night at the digs was about the same as it ran with gas...but don't forget that this thing is nowhere near tuned. It had a miss all the way down, and I hit the limiter pretty hard going into high gear, then lifted approx. 20 feet before the 1/8 mile finish.
I'm told that it's supposed to be about .3 faster than a perfectly tuned gas carburetor. Mine wasn't perfect, so maybe more, maybe less. We'll see.
I'm afraid we'll need some more pictures of that setup.
I just noticed there is a Ron's set up on racer-net now for sale with rebuilt pump. $1300 with BBF intake or $1000 without intake. Sounds like mavman got a pretty good deal.