71 chevy

iTrader: (18)

You got it.its pretty simple really.i use the biggest darn regulator that fuelab sells.i had a med size aeromotive one and it couldn't maintain the pressure above 3000 rpm.
The reg is 1:1 with boost

My pulley is 43 percent of engine speed.

Timing is 23 degrees at 12 psi but i plan to increase that number next time out

71 chevy

iTrader: (18)

3 gallon jaz pro mod fuel cell(for sale now for $ 120,since i went rear mount)

12 an to belt drive pump
10 an from pump to y
8 an from y to rails
10 an return line

Smallblockguy

I am building a set up right now with an ms3, msd 6012, 4 550lb injectors and 8 30lb injectors. Blending from %100 sequential gas to %100 batch fire methanol.

Drag week build.

elkydragger

iTrader: (7)

That is cool, Fuelab is 15min from my shop. I planned on hitting them up for a "deal", but they might not like me running an enderle pump bit we will see.

71 chevy

iTrader: (18)

I spoke to them before i bought and they said it would control it, and it did.

only 4 regulators i know that can keep up and two of them look like damn spaceships. only the fuelab and weldon have two ports and the fuelab ended up cheaper so I bought it. im happy i did . very well made regulator


sounds like a cool build. keep in mind the 550lb injectors are rated at 90 psi base pressure.

where do you plan to have the 4 injectors located?

87silverbullet

iTrader: (11)

You might want to do a search on fuelab. Their regulators might be working out well but I have seen on more than one occasion that their fuel pumps are garbage.

BMF_Racing

iTrader: (6)

Well, how much is kinda a range (900whp to 1500whp). I told Moran 1500whp through a 400 and 9" would be max for this engine & I didn't want to be limited by injectors so they said do the 500's which are rated at 90psi and I should be around 70% dc at the 1500whp. I'm liking the Holley setup the more I look at it, just gotta save my pennies up.

TheLS1Lover

Phil runs methanol on his 450" PT118 combo. Seems to work for him.

71 chevy

iTrader: (18)

$2640 for injectors... i think i paid less than that for my 8.5 roller lol.

160 injectors... 90 psi = 320lbs. *8= 2560lbs per hour ,*80% duty cycle

= 2048 HP that they can support on methanol.

and you can get a set of 8 used for the price of one moran injector.

hey, i just saved you over 2 grand. thats your hp efi and mechanical fuel pump setup right there. youre welcome

Smallblockguy

If you double the pressure it does not double the flow.

s57_s2k

you are right , that's in lines . but if an ejector is rated 160 @45 psi , doubling the pressure will double the "injector" flow rate (if it didn't choke "no losses" or can handle the pressure) .

71 chevy

iTrader: (18)

explain.

WhiteLTone

iTrader: (18)

soon?

BMF_Racing

iTrader: (6)

Sorry you didn't save me anything, I own everything already . MRE's have been proven to have superior spoolup over other injectors and have seen too many people have great luck from them to cheap out in this area of the build. There is no way 160's at double their designed psi would be as controlled and accurate as the MRE's which are designed to function at 90psi from the get go. If I was doing less of a budget and not building for down the road, maybe I would have considered some smaller/cheaper injectors, but thanks for your input/suggestions.

The Holley system I'm looking at with the "add ons" is over $3k. Guessing that will be next season.

71 chevy

iTrader: (18)

No problem man. If you cam afford it more power to you.I'm using the Ford factory 160s and spool time is 0.8s to 10 pSi afr is dead stable down track.

I bought them from a top sportsman guy for $100 lol and if i ever out grow them I'll spend about $400 and add a set of mechanical injection lines and nozzles and have a dual setup running off the same pump for cheap and just have the Holley do all the necessary corrections.

Not that I've thought about it a lot lol

BMF_Racing

iTrader: (6)

That would work very well and a nice way to add the supplement fuel needed. I like that idea alot.

StrokerTA

Making passes before August, that soon!

Smallblockguy

If you take an injector that flows 160lbs @ 43.5 psi and turn it up to 90 psi it will flow 230lbs

http://witchhunter.com/injectorcalc1.php

kevin87turbot

iTrader: (2)

Smallblockguy is correct. The change in injector flow is a function of the square root of the pressure increase. New flowrate = Old Flowrate x sq rt (New press - Old press)

71 chevy

iTrader: (18)

Hey, thanks for that. I just learned something new.