Bear with me guys. I've been asked to create a DIY based on my alky system. This is the start and hopefully won't take me too long to finish.

The brain of the system is a Split Second Engine Management Control Unit. Using "T" clamps I tied into my PCM input and tapped crank and cam sensors for RPM and exhaust sensors for EGTS. The Split Second has been remapped using an "R4 controller." I access the computer through my laptop PC Using an RS232 cable. The unit will only monitor crank sensor, cam sensor, EGTs and boost to deliver the alcohol through two anodized injectors (designed for alcohol) at preset rates to optimize efficiency.

Flow is controlled two ways.

#1 at 3psi boost, the system arms and fires injector one at about 150cc/min as boost climbs, so doe’s rate of injection. At 6 psi, injector two starts firing to match the 150cc/min giving me 300cc/min. At WOT the system is firing about 500 cc/min. This is about 40% of the injector’s potential.

List of parts.
01. Split Second Controller P/N #4PCE160-011
02. Northern Star Water Pump P/N #M2682270
03. Brass Fitting For Injector ½” P/N #P10717(female)
04. Fittings for pump/tank 3/8” P/N #43075
05. Bosch 750cc SIEMENS Injectors P/N #3145
06. Automotive 12V 30 Amp Relay P/N# 275-226
07. Devil’s Own Nylon Tubing P/N #2009
08. 2 Blade Type Fuse Holders P/N# 270-1213
09. 3 pack 20Amp Blade Type Fuses P/N# 270-1083
10. Lighted Rocker Switch P/N# 14-308
11. Scotchloks Splice Tap Terminals P/N# AWS-31562
12. Injection Tank
13. Insulated Electrical Connectors
14. 12 Gauge Wire Black/Red
15. Vacuum Line “T”

01
SplitSec.jpg
02
Northernpump.jpg
03
12adapter.jpg
04
38brass.jpg
05
injector.jpg
06
275-226.jpg
07
nylon_tubbing.jpg
08 & 09
Picture014.jpg
10
14-308.jpg
11
KM3156210P.jpg
12
002.jpg
13
electrical.jpg
14
wire.jpg
15
Tvac.jpg

Here is the wiring diagram.

 

Wicked cool! What kind of HP are we looking at?

 

On a boosted application, an easy 30 horsepower.

 

what was the total cost of this DIY?

 

Computer conotrolled systems usually cost around $400.00 where a standard pressure switch system is around $150.00. Once I complete my Computer Injection DIY I'm going to make one for standard boost pressure switches.

 

Are you running a ratio of water to methanol, or straight methanol? Are you compensating in tuning the fuel trims and timing maps under closed loop? I saw a "SCT" badge in the first picture....is this yours?

 

Denatured Alcohol you can buy at Lowe's. VP M1 Racing Methanol you have to buy at a performance shops and business that carry racing fuel.

My current mixture is 40% Denatured Alcohol, 40% M1 Meth, and 20% water. The M1 will drop A/R ratio as is burns as a high octane fuel. My tuning program is written to take it into consideration. Under WOT I still run a little rich 11.2 @ 6psi. As I climp up to 13-14psi Its closer to 11.8 right before shift. One cool thing about using the split second to control the alky it allows me to control several varibles.

And the SCT badge is not mine, Kevin kept that, lol. I like the sleeper look.

 

I apologize its taken me so long but here is my wiring diagram.

 

Jeeeeeeeeesh, you could have at LEAST gotten the pump straight on the truck..

hahaha jk