Thread:

blown gas reliability and user friendlyness question

i am trying to decide what i wanna do for an engine in my flatty for next year. i am trying to decide betweena big ci n/a motor or a small ci blown gas deal. but i have heard a blown injected gas engine is not very user friendly for running around a lake or river..... i heard they will foul plugs and black smoke and not run rite unless WOT? and i was told to just run alky but i want to have enough fuel on board to run 50-60 miles. i have 2 10 gallon saddle tanks. do you think i would be able to run 50-60 miles with a blown alky deal or would i even be able to do it with a blown gas deal? wanting to make somewhere around 700hp. and with a blown injected gas deal would i be able to run pump gas and make that kinda power? or will pump gas not be consistant enough batch to batch to even think about using in a blown injected application? thanks dj

Whoa, you're all over the board.

You need to spend some time reading up on all this, make a solid plan, and not rely on opinions.
How much you have to spend and how much you can do yourself is going to be a huge factor.

Amazon is your friend.

Ok i guess let me rephrase a little. i know n/a motors and i know an n/a motor will do what i want as as far as having enough fuel on bored to run 50 miles up and down the river.... BUT! I want to build a blower motor and i am questioning the ability to have the range i want in milage to run alcohol. I have a fair understanding of a blown alcohol engine and how to tune one. But from what i have heard blown gas is a pita to tune thats why i was asking about blown gas.... So i guess my questions are what kind of range would i have on 20 gal of alcohol with a 700-750hp blown alky motor i a hondo lake true flat with say 22s and if it is well less than my desired 50 miles how "lakeable" is a blown gas engine and is my 50 mile range and 700hp within reason with a blown pump gas engine? Hopfully that clears my questions up..... Thanks dj

I assume E85 isn't in the cards for you.

Not sure why "injection" would cause the trouble. Seems like alot of people have that figured out. Or so the claim. Is MFI so much a mystery and crude that it can't used to properly fuel a gas engine with reasonable accuracy. Come on MFI guys! Lets hear it. Is this a problem? For every body?

I race a blown gas deal, and the carbs aren't an issue. I guess if you want a blower on gasoline, its strictly carbs and EFI, because that MFI is to crude to handle the job. Like I said before, crude as a brick with a hole drilled in it. I guess I was right after all.

Originally Posted by Fiat48

Yeah you are right.

Yeah,m like I needed you to re afffirm what I have always known

Originally Posted by EVILFORCE

Tuning fuel injected gas is a no brainer. Just need the lap top.

Does the USB patch cord plug into the barrel valve, or the high speed bypass?

Originally Posted by blownboosted

I run a blown gas 565/14-71 set up in my 19 daytona jet, 10lbs of boost and a 200 shot of nitrous all on 92 pump gas. I use a superchiller intercooler and an AIS water/meth injection set up to acchieve this tune up. It always fires right up and runs great all day long, zero issues with it and was easy to tune.

I will be selling the intercooler and water/meth system as I will be swithing over to E85 this winter and will not need it anymore. We tested E85 all summer in a 21 daytona blown/nitrous combo and the fuel is amazing!! (10:1, 14lbs of boost, 400 shot of nitrous)

Was all this accomplished with a Big and Ugly, Hiborn 4 hole hat, Enderle Bug, bird, or buzzard? Crower 8 hole? or a good ole fashion Hilborn vertical 4 hole(my personal fav)

Originally Posted by blownboosted

Two 1250 dominators on my blown/nitrous gas set up

Two preditors on the blown/nitrous E85 set up

Well then you are of little to no use then aren't you" Hell even I can do it with carbs.
This guy is looking for professional advice on running a RACE induction system on a pleasure boat using gasoline. Not something as hi tech as two dominators, and certainly not Preditors.
He is looking for some one that can tell him how big the hole in the brick should be for a blown gas deal with out burning it down, or changing sparkplugs once an hour.

Seriously glastron, Fiat is your man.

That part is all pretty basic.
31 nozzle on the smaller motors (454 to 500)
33 on the big stuff.

Basic gas barrel valve....just adjust the barrell til it hesitates slightly when you rap it. Then richen it 2 flats.
Rap again....should be no hesitation. If there is....richen it another flat.

Projected tip plug preferred.....heat range 8.
Forget the high speed. River deal remember?

Main jet......oh about a 120 to start...prolly end up with a 135 or so. We are talking mild blower%...right?
No it won't foul plugs and shit.

You will:
Have to bottle it to start it. How long you have to bottle it depends on how long you fuel line is...how low or
high the pump is above the tank.

You will also need to make sure the fuel system (tanks) are wet at the pickup at all times...because if you
suck air....even for a second....she will quit. And then you will play hell figuring out if she picked the fuel back up real quick or if the pump is in air.
You'll bottle it when it doesn't need be and will flood it. Black smoke and flames out the pipes.
Fire extenguisher handy.

That will be close enough for a river deal. Personally I would just do carbs for that kind of thing. All depends on how much you like to tinker.