Aftermarket FI options for Type 4 motors 2056 or larger, Who here has gone this route and is it worth it? What options do we have? Options

[r_towle]

Last time I looked at this CBPerformance sold complete kits.

Lately I have been looking for EFI on a six cylinder, and the options for generic throttle bodies are many, with adapters for lots of different engines.
Bore size is an option
All the stuff is now out there, including Coil on Plug tech

Rich

[rgolia]

I have the Dub Shop kit on my 2056. As delivered it was easy to install and set up, and it started and idled on the first attempt with the default Type 4 tune file Mario included. After one dyno session I consider the tune 90-95% complete. I hope to get the remaining 5% this summer as I learn how to tweak the Megasquirt settings.

Did you have carbs prior to installing the dub shop kit? If so, what are the benefits. That is not a cheap kit, but I am seriously considering it.

No, my non-running engine had the original D-jet, but with lots of questionable components and beat up wires and connectors. I rationalized the price of the Dub Shop kit with guesses how much I could spend to repair the D-jet. Plus I wanted the programability (and the sexy ITB stacks).

I think I am getting more power out of my build, and smoother running. The biggest flaw in the Dub Shop kit is the lack of a separate cold start circuit. Not too important to me, but could be for some.

@bkrantz

I am seriously looking at the dubshop system. This car is like a family member having it since new, so I will do my best to swipe the credit card with out swallowing to hard. The engine was rebuilt a few years ago at Tangerine Racing, 2056 with new AA heads done by Hoffman. It runs great, but cold and warm starts suck and the fuel smell is getting old. Right now it is running with 44 webers and there is no existing FI stuff left in the car as far as I know.

So is this the place that you started and how much time did it take to install and tune. Please provide details. I can deal with the spend but I cant deal with frustration and not being able to drive the car because I get the thing dialed in.

[Superhawk996]

(IMG:style_emoticons/default/agree.gif)

Like rgolia, I’ve leaned toward DubShop . Mario has a dyno. He seems to provide a reasonable base tune to start from, etc. Sells as a nice complete kit.

I’d really like to know about low speed, off idle drive ability using Alpha-N or hybrid tuning if you know which is being used. Even if you don’t know or haven’t played yet with tuning, what are your impressions of driveability at low throttle?

Regarding cold start circuit, if you mean a Weber type choke circuit, I’m confused. With EFI you should be able to tune injector pulse with by temperature. So if ambient temp (or head temp) is cold, cold, like 20F, you should be able to modify the fuel map and just dump in some extra fuel

[mihai914]

I found this thread specifically about the Dub Shop system:

http://www.914world.com/bbs2/index.php?sho...211929&st=0

Almost ten years has gone by!

[bkrantz]

I have the Dub Shop kit on my 2056. As delivered it was easy to install and set up, and it started and idled on the first attempt with the default Type 4 tune file Mario included. After one dyno session I consider the tune 90-95% complete. I hope to get the remaining 5% this summer as I learn how to tweak the Megasquirt settings.

Did you have carbs prior to installing the dub shop kit? If so, what are the benefits. That is not a cheap kit, but I am seriously considering it.

No, my non-running engine had the original D-jet, but with lots of questionable components and beat up wires and connectors. I rationalized the price of the Dub Shop kit with guesses how much I could spend to repair the D-jet. Plus I wanted the programability (and the sexy ITB stacks).

I think I am getting more power out of my build, and smoother running. The biggest flaw in the Dub Shop kit is the lack of a separate cold start circuit. Not too important to me, but could be for some.

@bkrantz

I am seriously looking at the dubshop system. This car is like a family member having it since new, so I will do my best to swipe the credit card with out swallowing to hard. The engine was rebuilt a few years ago at Tangerine Racing, 2056 with new AA heads done by Hoffman. It runs great, but cold and warm starts suck and the fuel smell is getting old. Right now it is running with 44 webers and there is no existing FI stuff left in the car as far as I know.

So is this the place that you started and how much time did it take to install and tune. Please provide details. I can deal with the spend but I cant deal with frustration and not being able to drive the car because I get the thing dialed in.

For all the gory details, check my build thread, from Sept 2021 to Feb 2022. My dyno tune session was July 2022. I was doing other rebuild work at the same time, so my timeline is complicated. I would bet installing just the EFI kit could be done in about 40 hours.

You will need to embrace tuning with Megasquirt software. It takes a bit to get it set up and learn the basics, but the help manual is OK, and there is lots of stuff online. And you need to decide to pursue tuning by trial and error, or spend the money for some hours (3-6) on a dyno with an operator who knows Megsquirt.

Mario was very good to work with. During the set-up for my dyno session, we ran into a problem and Mario responded to my call for help immediately and saved the session.

BTW, I also have Hoffman heads.