FI tech (1 Viewer)

[ryanwk628]

So I think I understand the concern of the tech at FiTech about flow. Essentially it is about intake velocity during acceleration. It would probably run great at any RPM, but reving up the wide CFM opening of the throttle body could result in a drop as air tries to fill the void (like a pressure/flow bottle neck). This could result in poor throttle response and air pulsing through, ultimately leading to a backfire. There is some discussion on this physics forum. My idea of adapting it to the stock intake and using the stock air cleaner for a stock look would probably result in the worst air flow cross section differences.

That said, people are running 4 bbl carbs on F engines and these throttle bodies on 120HP 1.8L VWs.

 

[ryanwk628]

This shop put a Fitech on a 2F. Seems to work well


Looks like they are using a Mr Gasket Carb Adapter. I have the same one and it lines up with my F engine base gasket

 

[ERNRAM]

Which shop was this?

 

[White Stripe]

Wow sounds good. Now how can you use that system to control timing as well with the FJ60 distributor?

 

[ryanwk628]

Which shop was this?

The video should say its Cabinet Cruisers. I don't have experience with them personally but follow them and several other shops on social media. Looks like they do great work

 

[gregnash]

Very interesting... Looks like a completely rebuilt 2F. Wondering if there would be any issues or drawbacks seen if this was installed on a "less healthy" 2F. For instance mine has 130psi across the board, not bad but not great. Wonder if the lower compression would cause any issues.

 

[blbuck12]

I have been toying around with the idea of the FiTech system, not sure how I missed this thread!
Ordered one last June to replace an Edelbrock carb on a Chevy V8, but after 6 weeks it still hadn't shipped from Jegs so I cancelled the order... The video above is making think the 2F needs one

 

[ryanwk628]

Here is a FiTech unit getting installed on a Chevy I6, a cousin to our F and 2F engine. I want to do this and am on the hunt for an Offenhauser intake.

 

[argh55]

So just saw this thread - I dropped a Fitech on my 2F rebuild for my FJ55 last fall. I was so fed up with screwing with the choke in the winter. This thing works like a charm. It took a couple weeks for it to tune to my engine...and ever since it has just gotten smoother and smoother.

Install was very easy. Mr. Gasket adapter ( a little grinding for clearance ), fuel pump from RobbMC, some nice fuel hose and the rest was plug and play.

 

[HemiAlex]

How did you adapt to the pedal?

 

[argh55]

How did you adapt to the pedal?

No need - just tied my existing cable to the linkage arm.

 

[blbuck12]

@argh55 looks like you have a few more items then just the Fitech. Anything else on the motor besides the headers and HEI? Did you use the Fitech 400hp?

 

[argh55]

Engine rebuild was pretty std....new pistons, stock cam, head. I've had 2 high compression 2F motors from Man-a-Fre with Webers in the truck over the years. Both were bad builds - one replaced under warranty, the second one out of warranty (they over-bored, and honed halfway - slapped the head on and shipped it to me - I found out why my compression sucked when I finally tore it down out of frustration a couple years later ).

The good bits in this build are bolts-ons you spotted - Fitech (400hp), HEI, headers are the performance upgrades - I chucked my MAF internals. Mated to a 5 speed I installed 12 years ago. This setup runs about as good as I could hope, and is more responsive than the first "good" MAF high compression motor I had with a Weber 38 - but that is seat of the pants and memory does fade .

 

[White Stripe]

Engine rebuild was pretty std....new pistons, stock cam, head. I've had 2 high compression 2F motors from Man-a-Fre with Webers in the truck over the years. Both were bad builds - one replaced under warranty, the second one out of warranty (they over-bored, and honed halfway - slapped the head on and shipped it to me - I found out why my compression sucked when I finally tore it down out of frustration a couple years later ).

The good bits in this build are bolts-ons you spotted - Fitech (400hp), HEI, headers are the performance upgrades - I chucked my MAF internals. Mated to a 5 speed I installed 12 years ago. This setup runs about as good as I could hope, and is more responsive than the first "good" MAF high compression motor I had with a Weber 38 - but that is seat of the pants and memory does fade .

Wow very nice man!

 

[gregnash]

Wow... @argh55 Any chance you can give us a link to a build up on the engine with the FiTech and a video of it running? What has the fuel economy been like with the FiTech?

 

[ryanwk628]

So just saw this thread - I dropped a Fitech on my 2F rebuild for my FJ55 last fall. I was so fed up with screwing with the choke in the winter. This thing works like a charm. It took a couple weeks for it to tune to my engine...and ever since it has just gotten smoother and smoother.

Install was very easy. Mr. Gasket adapter ( a little grinding for clearance ), fuel pump from RobbMC, some nice fuel hose and the rest was plug and play.

That is awesome! Definitely something I would like to do in the next year or so. How did you handle 3/8-NPT coolant temperature sensor?

 

[argh55]

@gregnash - i never did a write up - life kept getting in the way as you might expect. I was lucky enough to find the time to do the build. I'll see if I can get some pics and info posted in the next week or so but feel free to ping me if you have questions. I'll try to shoot a video over the weekend of the engine running.

@ryanwk628 - my existing coolant sensor is tee'd into the return from the heater, and there is another port on the head right next to it. If i recall, it is some strange thread pitch, and I needed a bushing. So I have 2 coolant sensors. I remember reading somewhere that you get a better reading off the bottom half of the thermostat lower housing plug.... but I don't know for sure.

 

[bengelke]

There is a question in their FAQ about heat on a 2F

benjamin September 7, 2016 at 10:39 pm Reply
I’m running an inline 6 (2F) in my FJ40 and upgrading to fuel injection. Has the FiTech unit been designed to protect itself from the heat being mounted directly over an exhaust header? My concern would be that the heat might affect the electronics. Thanks!​

1. 
   
   Bryce - FiTech Tech Pro September 13, 2016 at 8:38 pm Reply
   We have not had any heat related issues with our ECU’s. Our systems are built to take the heat of an engine compartment.

This is "Benjamin" from the FB post: I'm just about to order the FiTech Go Street and see how well it works with the Offenhauser intake and post a new thread with pics in the next few weeks.

 

[gregnash]

This is "Benjamin" from the FB post: I'm just about to order the FiTech Go Street and see how well it works with the Offenhauser intake and post a new thread with pics in the next few weeks.

@argh55 and Ben PLEASE do a write-up on this with some install stuff as we are all interested to see what this little unit can do. This is pretty much one of only three ways to get FI on our old 2Fs and if it yields good results then there are more than a few of us that will be interested in purchasing.

 

[SNG]

I have the Fitech Go Steet 400 on my 76 fj40 2f engine. I used a 4 barrel dual plane Offenhauser intake. I have read that single plane tend to work better with efi but I don't know if it would matter. I have significantly more feel of the pants power and my engine runs really smooth up to 4,000 rpm where I stop pushing it.

It used to feel like my cruiser was going to explode (what I thought was drive train vibration is gone). It runs very well and I could not be happier with it. I have some stumble if I push the pedal quickly but no problems with normal driving only when seeing how it responds to being stomped on. I may be able to be solved with proper settings but could also be from having a big throttle body opening up on an engine that was not really designed to flow so much air. I am still trying to dial that problem in but I don't have much knowledge in that arena. Also could be a result of low compression maybe? I only have 80 lbs in my cylinders.

I had to replace my brake booster with a pancake style (from a 80 series if I remember right, rotated upside down with a spacer) because it was in the way.