Picked up a Holley Projection Fuel injection kit

Sarg · Post by **Sarg** » January 7, 2011, 6:01 pm

So I have one of these coming to me as I type. I figured I would start a thread for those that have been curious about them. It is nothing fancy, just the 2 barrel 670 CFM version. But I figured it would give me something to play with until the multi-port 535 CI stroker motor goes in.

I have heard mixed reviews about the old analog system and figured I would give it a shot for myself. For what I picked it up for, I can easily get back out of it. I have never messed with the 2 barrel version, so it is something new. Impressions to follow

MY OL 66 · Post by **MY OL 66** » January 7, 2011, 7:31 pm

I am definitely interested in your results, impressions, and comments!

Sarg · Post by **Sarg** » January 7, 2011, 7:56 pm

Well it is going on a bone stock 66 352. So we will see how it goes.

Post by **Greg D** » January 7, 2011, 11:47 pm

It's obviously not a Multi Port EFI, it will still have a little better efficiency than a carb. I have thought of one myself for my 5.0 in the 64.
If you decide you don't like it - let me know.

charliemccraney · Post by **charliemccraney** » January 7, 2011, 11:54 pm

That's pretty much the same throttle body which is used on many GM products from the late 80s and into the 90s. It will be much more efficient than a carb. People don't give that system enough credit. My firebird gets 28-30mpg on the highway and still burns rubber with that type of system. With a smaller cam, the TBI 305 produces 5 more ftlbs and the same horsepower when compared to the previous years carb'd engine. 179/194 and .350/.384 for tbi vs 202/207 and .404/.415 for the previous years carb'd engine.

Johnny Canuck · Post by **Johnny Canuck** » January 8, 2011, 11:17 am

I have one of these on my 302. So far it has been great, i always wanted to pick another one up cheap so i had spare parts, since i intend to drive this truck to the next SS. I've never put a single mile on it, its just run in my garage so far.

Sarg · Post by **Sarg** » January 8, 2011, 11:20 am

charliemccraney wrote:That's pretty much the same throttle body which is used on many GM products from the late 80s and into the 90s. It will be much more efficient than a carb. People don't give that system enough credit. My firebird gets 28-30mpg on the highway and still burns rubber with that type of system. With a smaller cam, the TBI 305 produces 5 more ftlbs and the same horsepower. 179/194 and .350/.384 for tbi vs 202/207 and .404/.415 for the previous years carb'd engine.

It is the same basic throttle body, but from my research the ECU is not nearly as good as the GM ecu. Much more basic. I have yet to play with these 2 barrel systems, so I thought this would be a good chance till the 535 goes in. Then I get to start tuning all over again.

charliemccraney · Post by **charliemccraney** » January 8, 2011, 11:58 am

I just checked the instructions, Projection is lacking. Projection does not control ignition timing, whereas the GM computer does. And it looks like closed loop operation is optional; it is not included with the kit. Those will definitely affect the operation.
I'll kinda have to go back on my previous statements. Without at least closed loop operation, I do not expect that particular system to be much better than a carb.
It'll suffice as something to play with but because it is tuned by turning knobs, it will not at all prepare you for tuning the multiport, if that is the intention.
I am curious to see how it performs, though.

Sarg · Post by **Sarg** » January 8, 2011, 12:07 pm

Haha, no it is just something to play with. It would in no way prepare me (if I didn't know how) to tune a full stand alone ecu from scratch.

1965 F350 · Post by **1965 F350** » January 8, 2011, 1:52 pm

I'm interested to see how it works. It could be a future project on my 4x4.
Good luck.

Sarg · Post by **Sarg** » January 8, 2011, 8:01 pm

I have read it can be decent on 4x4 vehicles, but then some still swear by carbs

With the add on closed loop, I think it could work really well, but it will never beat a fully tuned stand alone.

With the 535 CI turbo, we plan on running a full stand alone complete with boost control, ignition control, full sequential injection, pretty much everything. It will also be a test for the limits of that particular ecu. I will be doing a write up on that one as well. But that is probably 6+ months down the road. I have that motor and my Subaru drag car (slash weekend cruiser) to finish.

Unibodyguy1 · Post by **Unibodyguy1** » January 10, 2011, 12:55 am

I have a 85 Ford F150 with a 300-6 that has a 2bll. version of the Projection on it. Got the trukl for free and wanted to put it on my Uni with the 292. Hopefully someday I'll get it switched over.

Michael

Sarg · Post by **Sarg** » January 10, 2011, 9:52 am

That is what this is, the 2 barrel version. But since it is going on a bone stock engine I figured it was MORE than what that old tired 352 needs. I am anticipating having to dial it back as much as possible. I think the Autolite is rated at 350 or 375 cfm, lol.

Sarg · Post by **Sarg** » January 22, 2011, 2:00 pm

well, came in this week, hope to get started on it as soon as I get a spare moment. Also going to add an additional electrical panel with modern fuses for it and other misc electrical accessories.

ezernut9mm · Post by **ezernut9mm** » January 22, 2011, 4:58 pm

cool. will be watching for progress.

Sarg · Post by **Sarg** » January 29, 2011, 8:01 pm

Ok we are most of the way there...late start and some parts not working as designed. If you have a 2 barrel intake, do NOT get the Transdapt 2 barrel to TBI adapter plate. It was a nightmare. Over an hour of grinding and shaping later I did get it to work, but I would much rather have paid the extra money for the Holley part.

At this point everything is wired up and ready to go, just need to finish running the fuel line and getting the throttle and transmission kick down hooked up tomorrow and we will be ready to tune!

We also took the time to add an additional fuse panel for accessories even though it was not absolutely necessary.

Sarg · Post by **Sarg** » January 30, 2011, 9:16 pm

Well, everything is done but the fuel pump was DOA

The guy I bought it from said everything was there and working. But the pump is dead and the coolant temp sensor was no there

So, will let you guys know when the new pump is on.

Motocentro · Post by **Motocentro** » January 31, 2011, 9:33 am

Did you need to use a dual pump system? If you are using the stock tank setup, those high pressure pumps don't do a very good job at pulling fuel up a line. They have to be fed first, either by gravity or by a secondary pump. Probably not your issue, but wanted to throw that out there.

Since i made the transition to EFI when I made my 302 swap I have vowed to never go back. Cranks and runs like a new engine everytime I turn the key. Sequential injection gives great gas mileage and the throttle response is pretty phenomenal. I stuck an Isky dual profile "truck cam" into it, rollerized the entire valve train and boy does it motivate that little truck.

I reasoned that the Ford EFI system was not only reliable but since you have the ability to control spark timing as well as individual pulse width the possibilities are pretty wide open with tuning. Sure - I might not make top end power like a dual four barrel tunnel ram, but then again I am driving in city traffic so it's been a real hoot. Rally glad I made the move. Between the 3.7 gears and the cam selection she runs like a scalded dog.

I'm curious to hear your impresstions of the TBI system. I've heard nothing but good from everyone else. Good luck with getting that pump straightened out.

Sarg · Post by **Sarg** » January 31, 2011, 9:47 am

Pump didn't even turn on unfortunately.

Unibodyguy1 · Post by **Unibodyguy1** » January 31, 2011, 12:55 pm

I'll be very curious to see what the milage difference will be between the two systems.

Michael