GuruX wrote: ↑Thu May 09, 2019 11:29 am
So happy I found your thread!
I'm doing pretty much the same thing, with Type 4 1800 cc in my late bay. Engine code is AP. Conversion for modern fuel injection.
So, things we've got in common:
1. EFI in a DIY way.
2. Modern injectors in same place as the old ones.
3. Dual carbs removed
4. DIY fuel rail with parts from other cars
5. Conversion with a 2.0 bus plenum and Bosch TPS.
Things I'm doing differently.
1. ECU, I'm using a Speeduino
2. EV6 injectors. I have 3D printed an adapter. I'd be happy to send you a set if you need them.
3. Plans on fitting a flexifuel sensor for running on both E85 and petrol.
4. Trigger wheel from The Dub Shop
5. Surge tank
6. No building for performance. I just don't know how to use carbs, electronics suits me better.
7. Different intake runners.
My project thread here is a bit thin. I have spread out over the internet, so here are a couple of links to my build.
Shoptalk forums:
viewtopic.php?f=14&t=150578&sid=2d87f45 ... 283f068e5d
Speeduino forums:
http://speeduino.com/forum/viewtopic.php?t=1468
TheSamba:
https://www.thesamba.com/vw/forum/viewt ... 3f8dd35ac3
I think we could help each other out with some parts of the build. Right now I'm thinking about the throttle cable routing.
Hi GuruX, nice build you have yourself! Going a lot quicker than I am.
I will follow you on youtube/facebook to see your progress!
What fuel rail are you using as a base? Does it have 85 mm (and not the 88 mm from the Audi/VW engines)?
I hate setting carbs too... I understand the physics behind it, but somehow it is still magic/art to me instead of science.
It looks like you are using a 1.7L plenum, right? I did some calculations and seems like the 2L plenum matches the 2L engine very well (what a surprize, the VW engineers prob. made the same calculation in the 70s) Because i am upgrading the engine to 2054cc later on, i chose to go that way.
All the things you are doing differently, I considered also before;
1. I looked at MS/Speeduino but want warranty/support from a "real" company and not only from a community, however the ECUMaster community is very active as well.
2. I considered using EV1 injectors, they can be used with the original clamps and converted to the axial sealing (with the square rings) and the hose feed that the original injection uses. There is a guy in the Netherlands (where i am from) that did this, but the forum he posted this on is offline unfortunately (keversite.nl). If I remember correctly, he used a refurbishment set for the original injectors, cut off plastic from the EV1 injectors and that was it. You might be able to use the square rings as well if you cut off the plastic from the EV6 and use your printed adapter.
Because of my day-to-day work (I design engines for a living) I could not get myself to use the O-ring axially/in the original chamfer, as for me, such things need to be to "spec" from the manufacturer (Bosch).
3. My fuel system will be Ethanol resistant, and the ECU can handle flexfuel as well. Unfortunately E85/E100 is very poorly available in my area (at least 40km driving) so will not do this yet.
4. I like the dubshop sensor and bracket over the one i am using. As soon as mine causes any trouble, I will design a bracket for such a sensor myself and use that instead.
5. Packaging a surge thank with internal fuel pump below my car is difficult (it is lowered). Also i do not see very big advantages, you still need to vent it into the tank, so need 2 connections. And as it is a bus, i do not need the "cornering" advantage.
6. Not building for performance as well. Electronics is not my thing (its mechanics) but as said, carbs are not my friend either.
7. Intake runners look the same (1.7 914), but i can be mistaken.
Throttle cable routing is one of the next things on my list as well. but original injection bus routing should work..............
By the way, which material are you using for the 3D printed parts? I backed a Snapmaker 2 on Kickstarter just a few days ago, so hopefully at the end of the year I will be printing carparts.
Glad to share my thoughts, documentation and discussion helps any technical development. That is why i do it, so if anyone learns/profits from it for their own project it is a bonus!