Can't believe you're not getting any replies.

There are some good systems out there. Holley and FAST are two of the most popular. Both have self learning systems they brought out recently. Don't be fooled, you still need to tune some things, but with a popular engine combo you won't need to do much.

There is a good EFI forum at chevytalk.com. The moderator is a Holley tech guy, so it's predominately Holley expertise, but the basics are the same for all, and they do talk about FAST and other systems too. So go over there and do a little reading and searching.

 

yeah i was looking at the fast kit, i didnt say the holley one yet, im sure the prices are about the same.. ill have to check that forum out.. I'm looking to put one on a 383 with a mild cam

 

Are you interested in the tbi kits or the more expensive mfi type?

 

not sure, i dont know the pros or cons to either system

 

I had holley pro jection 2 barrel tbi system in early 90´s and it sucks big time...after that I have only dealt with carbs but I think its about time to check FI stuff again...not much help for you just saying ,and i´m pretty sure that todays holley products are very fine pieces.

 

You might be able to make a bit more power with the multiport system, but the TBI is a little simpler and cheaper.

FAST probably has the best price with their newest system, but the reason for that is that is doesn't have any timing control. Even the lowest level Holley system has computer controlled timing. I think that's a good thing to have.

The old Holley Projection is a Flintstone deal compared to anything you can buy today.

 

I don't know anything about this company, but I thought they had a good price for a brand new TPI style setup. It comes complete (with a distributor too), and is customized to what you need.
I still think today that the GM L98 TPI was the best looking engine that they ever made.
You can get this setup for just slightly more than the higher end Holley tbi kit.

http://www.affordable-fuel-injection.com/ixxocart/products/Chevrolet_Tuned_Port_Injection-24-40.html

They've got several choices for a sbc:
http://www.affordable-fuel-injection.com/ixxocart/catalog/Chevrolet_Small_Block_V8_305_327_350_383_400-55-1.html

 

Megasquirt is another budget option.

Back to the FAST, a guy down the street from me put a FAST on an IROC TPI Camaro that had been sitting a long time with parts missing, etc. Spent $867 for the controller and harness. He's very happy with it. It doesn't have computer spark timing, but his original TPI didn't either (but later ones did).

 

TBI vs MPFI

To me a tbi is not much more than a electronic carb. I think with a MPFI that you should run a ram air setup to get cooler air to the engine. A TBI injects fuel at throttle body this will help cool incoming air charge that doesn't happen with a MPFI.
Horsepower TV this morning they were using a Fast self learning system . It seemed to work well for them.
I do agree that I only want something that will control the timing . (No hanging weights or rusted up mechinisim. Going to drop total advance 4 degree after torque peak (which you cant do with a distributor)
I think most TBI,s are low fuel pressure unit a MPFI are either 12-15 psi. while MPFI are either 42or 50 psi. which require the best of fuel and return lines for saftey. and probably a fuel tank with internal pump to help cool the pump. (They don't come cheap)

 

This tank is $375 from RockAuto:

http://www.rockauto.com/catalog/moreinfo.php?pk=1216839

That's as cheap as it gets for a tank with an internal pump.

EFI kits are going to give you an in-line pump. With those you really can let your stock tank run any lower than 1/4 or you can get stalling. You need a tank with a baffle in it and if you are going to do that, you might as well get one with a pump too.

I bought mine from Tanks, Inc. Not much more money but I liked it a little better than the Spectra for what I wanted.

 

I went to a MasFlo EFI system about 3 years ago. It is a self learning system. I used an external pump and 3/8 feed line with a 5/16 return line back to the filler tube at the stock tank. Good day.

 

are you happy with it? any issues? experience with it?

 

"Horsepower TV this morning they were using a Fast self learning system . It seemed to work well for them."

Well of course, there are never any problems on TV.

 

Are you interested in an aftermarket EFI or a factory unit? I installed a GM TBI system on my 57. I am happy with it. Turn the key, let the fuel pump pressure up, then crank it and it is ready to roll.
Terry

 

do you have link to the system?

 

do you have link to the system?

No system. Bought a factory engine with the TBI unit on it. Hundreds sitting in salvage cars, easy for the picking.
Terry

 

what ever kit or custom application you choose pic the one which has room to grow...I have impression that stock gm tbi´s work very well in stock or near stock engines but for hefty 383 they wont cut the bill...

 

There's lots of information and expertise out there on the GM L98 TPI setup, along with custom wiring harnesses for older cars. From what I can tell, the system was used on 85-91 Corvettes and 87-92 Camaros.

http://forums.corvetteforum.com/guide-and-review/L98-engine.html
http://www.painlesswiring.com/faq.php?SearchCat=Tuned Port Injection

It may be an archaic system compared to the latest aftermarket stuff, but you'd probably never run into a parts or computer issue down the road, like you would if some of the aftermarket guys went belly-up or dropped the product.

 

I am quite happy with the BB MasFlo system. I would like to see a more complete package as you have to buy the fuel delivery components, which are supplied in other suppliers kits. Install was pretty easy, one I got the b*ll's to drill the hole in the floor to pass the wires through. I had trouble with the engine chugging on starting from a stop(standard) but cured that after talking to MasFlo and changing to a throttle cable from the solid rod. The wagon used about 4.2 gal's to go about 60 miles with the air on, from Syracuse to Watertown coming from the Syracuse Nationals. Good day. PS that is in US calculations, in Imperial it is 3.3 gal's, and gives 18.8 MPG Canadian.

 

I'm confused, are you gettng better or woorse gas mileage now? have you noticed a difference in HP or torque? do you have a list of all the parts you used to swap to efi?

 

It is a couple of MPG more with the EFI. I don't know if the HP or torque is more as I have not had the car dyno'd and is just a driver. My engine is about 8.8:1 and has an RV cam for towing our trailer.
http://www.massfloefi.com/mass-flo-systems-chevrolet-c-1_6/chevrolet-big-block-efi-system-p-9
I used Mallory EFI fuel pump, Summit filter and Mallory press reg, plus lines and fittings. Good day.

 

does this kit auto tune at setup or once dialed in? i dont see anything that says whether it does or doesnt

 

It is initially set at the factory for the engine you have and constantly relearning/ updating as you drive, good day.

 

That system is using a mass air flow meter (MAF), making corrections, storing the correction factor, and constantly updating it.

Other systems are using the MAP and TPS sensors to do the same thing.

For a high performance setup, you can end up being limited airflow wise by a MAF, so the higher horsepower, nitrous capable, and turbo capable systems don't use MAFs.

Nothing wrong with a MAF, but that's why the Holley, FAST, and some others don't use it.

 

that makes sense, u knew there was a catch lol, thanks

 

I'm looking at the Professional Products FI unit that looks like a stock Holley carb.. anyone running one??

 

I tried the professional carb looking thing. what a P.O.S !!!!tried it on 2 different cars ended up going with a holley commande mpi set up on both

 

how was the holley? did you see imroved hp torque mpg? or woorse or the same?

 

both were small block cars mild 327 and 383 combos new combos no past to history to compare to but they both ran awesome .

 

Mass Flo

I put a Mass Flo on a ZZ 383. I had trouble with it from the start. The owner was not much help and liked to talk down to me as if I was stupid. I had to adjust the TPS because it was out of whack. I have issues running at lower RPM (2,000 to 2,500) and what I was told is that engine is not designed to run at the lower RPM so the EFI system will not work properly. I mentioned to him I had the same engine trans and rear combo in another car and had an Edelbrock Pro Flo on it. Told him it ran great. HE said that with the Pro Flo I was able to trick the EFI unit by tuning it richer / leaner at certain parameters. When I mentioned the ProFlo might be a better choice because there was some latitude in tuning, he said the way to get his system to perform better would be to disconnect the O2 sensors and run it like that. I am not at all impressed with the unit or the customer no service. The unit is supposed to be a self learner, but this one is a slow learner that belongs on a short bus....

 

I put a Mass Flo on a ZZ 383. I had trouble with it from the start. The owner was not much help and liked to talk down to me as if I was stupid. I had to adjust the TPS because it was out of whack. I have issues running at lower RPM (2,000 to 2,500) and what I was told is that engine is not designed to run at the lower RPM so the EFI system will not work properly. I mentioned to him I had the same engine trans and rear combo in another car and had an Edelbrock Pro Flo on it. Told him it ran great. HE said that with the Pro Flo I was able to trick the EFI unit by tuning it richer / leaner at certain parameters. When I mentioned the ProFlo might be a better choice because there was some latitude in tuning, he said the way to get his system to perform better would be to disconnect the O2 sensors and run it like that. I am not at all impressed with the unit or the customer no service. The unit is supposed to be a self learner, but this one is a slow learner that belongs on a short bus....

I agree with your assessment of the owner, but I thought it was only me as I asked a question while I was installing the wiring and did not go back to the instructions before calling him. He does not seem to want to deal that much with customers after you bought the system. I also tried to contact dunne-rite about the fuse/ relay panel and left a message but so far no return call. I still like the system but not the after sale service, good day.

Also how did you set the TPS, ie; what paramiters etc?

 

Looks like name brands are way to go...have any member experience about this accel system...this would be something for my needs (or fast...)

http://www.gmhightechperformance.com/tech/0410htp_1969_chevy_nova_accel_dfi_conversion/index.html

 

EZ EFI

Have found Feb011 "Chevy High Performance" magazine did an install of EZ EFI on a 383 very similar to mine and ended up at 470 TQ 475 hp. Very close to what Engine Dyno program said what mine should make. Only thing it doesn't control timing. But you don;t have to replace all yout stuff either. Should run on any dual or single plane manifold so if you alredy have a good manifold you don't have to replace it . You choose a/f ratio in setup program. Master kit $2,136 at Summit. http://www.chevyhiperformance.com/t...ngines_drivetrain/accessories_electronics/1102chp_efi_system_install/index.html click on tech and scroll down to find article

 

Had a few, what you're saying does not speak well for that system. I have seen simlar posts elsewhere. I guess Henry was lucky. No way should you need to do what you were told with a quality system. In fact the opposite should be what you're told. They should be giving you the means to do it right.