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My FAST EFI / fuel injection mod thread

The spacer was to raise the inj unit up high enough that I could get a 90 degree elbow fitting into my vacuum port on my manifold behind it.

Box ??? ignition was an MSD 6 offroad model, I am using it for the EFI computer tach speed signal to the EFI computer and I am taking the tach lead off the MSD to run my tach. FAST doesn't recommend you feeding their control box off the MSD tach.

Box??? transmission stock 700r4 with a shift kit & cooler

Did I see on one of your posts that your running a "Y" pipe?? I hope it is not stock?

Are you doing this conversion for more power? As a good carb setup will do the same?
Knowing what I know now I would have gone carb, much cheaper and a lot less hassle. Both illegal, but ones a lot cheaper.

A good carb and a wide band O2 sensor permanently installed for feedback. And last of all ....... a big block !!!!!
 
I'll keep it short, cause I want this to be a thread about setting up a FAST system.

I found my limits quick with a carb/ angles. I am not done with my build either :)
FAST has the "filter" to be used with a good TACH signal off an HEI. That's is what I will try first.
MSD 6, sweet, thank you sir, I'll look into that one
Y pipe is 2.5" custom, into 3" pipe
I currently have a Q-jet. I'll only be keeping it around for smoging the truck if needed :)
 
Could a small cap HEI distributor be used with some aftermarket ignition box and have it jive with the FAST EFI?
 
79rustyk10 said:
Could a small cap HEI distributor be used with some aftermarket ignition box and have it jive with the FAST EFI?
Click to expand...

Like WYOboy said, the problem comes when getting a TACH signal. This is true with all similar stand alone FI systems. (ones that don't control spark)

You can wire the FAST directly to a CDI box, because it's going to provide a clean (no vibration or fuzzy coil timing) signal. The kit also comes with a "filter" of sorts. This is plugged into an HEI, then plugged into the FAST's ECU. It says the filter works very good, but if erratic RPM readings (normally found at higher RPM) is present, a CDI box is necessary. :waytogo:
 
K85, if you get the signal from the MSD HEI dizzy cap, it is just a link to the coil wire, so you would need the "filter box" that comes with the FAST kit. If you get an MSD 6A box (or similar), then you don't need the filter anymore.

Wyoming boy, MSD distributors are adjustable with how much (and how quick) the mechanical advance comes into play by changing the bushings and springs, so something doesn't make sense there?

I, along with many other people have had excellent results with MSD products for many years, I highly recommend them. They set the standard for ignition products in my opinion.
 
I agree about the MSD products being the industry standard. I have had no problems with ALL of the MSD distributors and ignition boxes along with coils that I have ever used.
 
Guys,

I too thought MSD was the best, but for whatever reason, I got a bad distributor( and yes I know all about the adjust-ability with springs and spacers), but when they send you one that goes 2x what it should it's BAD!
When you send it back to a career pro and he puts in on his distributor machine and it does the same thing it's BAD.

But this is a trend with many manufactures-the quality is going down- for whatever reason.

Then we send it back, and they claim to fix it, but they don't ! And you have to send it back a second time, it's BAD and the service is BAD.

I like to use forum's to share my experiences about vendors and suppliers, whether they are good or bad. Because otherwise people never know who is scamming them and who is doing a good job.

I have 3 MSD products on my vehicle, but I think I will choose another option the next time I have a chance.

I don't care what you buy, but I like to get honest feedback on forums, so I can make an informed choice when I make a purchase.

I also thought it was interesting in all of Vizard's books, that he doesn't recommend MSD , but Pertronix.

It's your choice and your buying dollars, use them how you will.
 
How did you guys hook up your brake booster vac line? There is no threaded spot on the TB, but there are two big vacuum nipples in the rear, hose and hose clamp? Or some kind of spacer with a threaded spot?
 
Vacuum ports- well I used all of the ones on the FAST efi unit. But for the brake booster, my Edelbrock performer rpm manifold had a large port just behind the unit. That is why I had to put a spacer under my unit to raise it enough to get a 3/8" 90degree elbow screwed into it to run vacuum for my brake booster. Even then I have about 3 " T's " in my booster line for other stuff
 
Wyomingboy said:
Vacuum ports- well I used all of the ones on the FAST efi unit. But for the brake booster, my Edelbrock performer rpm manifold had a large port just behind the unit. That is why I had to put a spacer under my unit to raise it enough to get a 3/8" 90degree elbow screwed into it to run vacuum for my brake booster. Even then I have about 3 " T's " in my booster line for other stuff
Click to expand...

I did the same except without the spacer and it made the injector wire connectors pretty tight to connect. I used the big fitting on the TBI unit for the PCV valve. There are two other smaller fittings on the side too. One is a full manifold vacuum that I used for my vacuum reference on the fuel pressure regulator and a ported vacuum that I hooked to my vacuum advance.
 
thanks guys!!

just waiting on the motor to get back from the shop, then I can start more of the fun. For whatever reason, I need the motor back in to find motivation to drop the gas tank and put in my body lift.:doah:
 
I used the two large ports in the back for the brake booster and PCV valve, and the small port on the bottom side for the vacuum advance. My vacuum modulator I hooked to the intake manifold. One of the larger ports on the FAST TB had a bigger channel feeding it, I used that one for the brake booster and the other for the PCV, but I may be splitting hairs there.
 
Wyomingboy said:
Vacuum ports- well I used all of the ones on the FAST efi unit. But for the brake booster, my Edelbrock performer rpm manifold had a large port just behind the unit. That is why I had to put a spacer under my unit to raise it enough to get a 3/8" 90degree elbow screwed into it to run vacuum for my brake booster. Even then I have about 3 " T's " in my booster line for other stuff
Click to expand...

That's cool man! I'm from Riverton originally, although I live in South Dakota right now. I'm going to have to check out your FAST set up because I still haven't settled on EFI for my rig...I do have a manifold off of a RAM JET GMPP engine that I was going to get all set up and I've been down the Holley EFI road unsuccessfully before. I now think that FAST is going to be how I roll. That, or an Edelbrock EFI....? I don't know. I'm just glad I started posting here finally. My project truck keeps getting stalled but I have a feeling next year is going to be the year that it hits the road again.
 
jevneaks said:
That's cool man! I'm from Riverton originally, although I live in South Dakota right now. I'm going to have to check out your FAST set up because I still haven't settled on EFI for my rig...I do have a manifold off of a RAM JET GMPP engine that I was going to get all set up and I've been down the Holley EFI road unsuccessfully before. I now think that FAST is going to be how I roll. That, or an Edelbrock EFI....? I don't know. I'm just glad I started posting here finally. My project truck keeps getting stalled but I have a feeling next year is going to be the year that it hits the road again.
Click to expand...

If you have the ram jet manifold I would get the EZEFI kit to control the seperate injectors, not the throttle body kit.
 
folkenheath said:
If you have the ram jet manifold I would get the EZEFI kit to control the seperate injectors, not the throttle body kit.
Click to expand...

FAST's EZEFI is what I'll do if I decide to use the RAM JET manifold. I know the difference between TPI and TBI :rolleyes: LOL. Of course I could just use a factory LS1 type throttle body? Like I said, I still haven't made up my mind. I do want something that controls the spark as well though.
 
jevneaks said:
FAST's EZEFI is what I'll do if I decide to use the RAM JET manifold. I know the difference between TPI and TBI :rolleyes: LOL. Of course I could just use a factory LS1 type throttle body? Like I said, I still haven't made up my mind. I do want something that controls the spark as well though.
Click to expand...

Well yeah that's pretty obvious, but some people aren't aware they have an EZ-EFI kit that will control seperate injectors, that is what I was trying to say. But if you want computer controlled spark with the EFI then EZ-EFI is not for you anyway. Take a look at Big Stuff 3 or XFI.
 
Wyomingboy said:
Guys,

I too thought MSD was the best, but for whatever reason, I got a bad distributor( and yes I know all about the adjust-ability with springs and spacers), but when they send you one that goes 2x what it should it's BAD!
When you send it back to a career pro and he puts in on his distributor machine and it does the same thing it's BAD.

But this is a trend with many manufactures-the quality is going down- for whatever reason.

Then we send it back, and they claim to fix it, but they don't ! And you have to send it back a second time, it's BAD and the service is BAD.

I like to use forum's to share my experiences about vendors and suppliers, whether they are good or bad. Because otherwise people never know who is scamming them and who is doing a good job.

I have 3 MSD products on my vehicle, but I think I will choose another option the next time I have a chance.

I don't care what you buy, but I like to get honest feedback on forums, so I can make an informed choice when I make a purchase.

I also thought it was interesting in all of Vizard's books, that he doesn't recommend MSD , but Pertronix.

It's your choice and your buying dollars, use them how you will.
Click to expand...

Wyomingboy,

Whatever the problem was I'd sure like to find out and make it right for you. I hate to hear when someone has a bad experience with the company I work for. If you still have the distributor shoot me a PM and we'll talk.

K85; didn't mean to hijack your thread. Nice setup on the EZ EFI. Of course for anyone else looking to do EFI this would be my suggestion but I'm a bit biased. :D

www.atomicefi.com

The EZ EFI is deffinately a nice piece.

-Phil
 
x2 on philly87 making things right. :bow:

he fixed my problem with msd no problems. asked for 1 bit of info and said yep send it back and he shipped me a brand new in the box part.

great guy and he does frequent the board here more than other major vendors do. :thumb:
 
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