Duffy's 1/71 Series 1 240z build

[jonbill]

1 minute ago, Patcon said:

So you built your own ECU and programming?

Well I did assemble the ECU for the full diy experience, but you can get preassembled ones too. I use the standard Speeduino firmware and tuned it myself on the road.

[duffymahoney]

16 minutes ago, jonbill said:

Well I did assemble the ECU for the full diy experience, but you can get preassembled ones too. I use the standard Speeduino firmware and tuned it myself on the road.

Wow! 

[duffymahoney]

1 hour ago, Zooter71 said:

Well, I actually had not thought it through, which after reading your reply....I guess I'll stick with the SU's on the vehicle.  I tuned them via the factory service manual just yesterday, and they work really well. Thanks for taking the time to explain the pitfalls!

If anyone else is reading this, just ask and I'll scan the SU section of the factory manual for the round tops and post the files here.  I know it's all over the internets, but it never hurts to have it more places.

If someday you aren't happy with the SU's.  The next step shouldn't be efi, unless you like to tinker and like computers or are fine spending money on tuning.  EFI when do right is amazing, but not easy.

[duffymahoney]

Well I’m 99% sure I’m going DBW(drive by wire) on my ITB setup. I will be swapping ecus when I get Larry Asp new injectors at the head intake. 

I was googling DBW pedals and I thought the 350z pedal box looked mighty similar to the 240z one. I got one to check and wow it’s close. I love when manufacturers don’t stray too far from designs. 

Then googling some more and freaking Etsy sells a direct mount for it! 

Now I need to change the pedal pad to look stock, and powder coat the housing. But it should be a very simple mod/ install. 

This will unlock cold starts, progressive throttles and a host of other things like torque control etc…

This is all Aaron Neubauer fault for posting about Emtron and their neat tuning method throttle mass flow.

[duffymahoney]

A quick little update on my 240z DBW gas pedal box from a 350z. I drilled the plate to match the 240z one then ground off the pedal stop. Lines up and bolts right in! I get full pedal travel and the stock stop on the floor it’s nicely. 

Next is buying a stock gas pedal and cutting off the pedal plate and welding it onto this one. Then powder coat it all to match the stock black. All in all very nice and easy. 
 

 

[duffymahoney]

Gosh this is going to be nice. 
 

laser cut plate welded then off to powder. 

[Blitzed]

Duffy,

Very cool, let me know the overall advantages with the Haltech ECU / tune. Hopefully DBW will fix the idle gain (after hot) and cold start set-up. 

I'm done throwing money at the EFI conversion, will stick with the stock throttle linkage /set -up.

Planning a 300+ mile drive (round trip) on the new set-up end of April to Solvang, CA for the Datsun Roaster Classic, multi day event. Engine is self tunning (fuel map) at this point, hopefully will gain some corrective data on the top end of the fuel map, highway travel.

Zooter71 - Ditto Duffy's comments. If I had to do all over again, would spend the initial dollars on a tunning course, HP or other. Money well spent. 

 

[duffymahoney]

7 minutes ago, Blitzed said:

Duffy,

Very cool, let me know the overall advantages with the Haltech ECU / tune. Hopefully DBW will fix the idle gain (after hot) and cold start set-up. 

I'm done throwing money at the EFI conversion, will stick with the stock throttle linkage /set -up.

Planning a 300+ mile drive (round trip) on the new set-up end of April to Solvang, CA for the Datsun Roaster Classic, multi day event. Engine is self tunning (fuel map) at this point, hopefully will gain some corrective data on the top end of the fuel map, highway travel.

Zooter71 - Ditto Duffy's comments. If I had to do all over again, would spend the initial dollars on a tunning course, HP or other. Money well spent. 

 

Agreed on the tunning courses.

[duffymahoney]

Laser cut, welded, powder coated and ready to install! Clocking and bend is about perfect from stock. Stoked

[duffymahoney]

ITB DBW update. Installed, feels and looks like stock! 

I had the stock pedal pad copied, then laser cut. Then welded onto the 350z pedal rod. I also had the pad bent to match my stock pedal and also clocked to match. After that I got it all powder coated to match. 

Should work great! I can tell it’s not attached to linkage, but it still feels somewhat stock. I like how I can’t really tell it’s not stock without looking hard.  

 

[duffymahoney]

Prepping the engine bay for Larry's new injectors at the head intake.  

[duffymahoney]

Well my balance bar design is done. Basically i made decorative bolt on injector blanks for my vintage SK throttles. Should work awesome.  The goal was to mimic what SK had in the 80s, these are my take on the original block off plates and vac plates.  

Next off to get cnc’d