VW, J Series, or Ecotec

trumanbuckley1 said:
I very much appreciate the input! I've done some stuff with LS swaps (carbureted SBC to LS) so I don't think the wiring/ecu part should be a big deal, fabrication is also not an issue as whatever I'm not proficient at my dad has built many rails over the years! His input on the whole thing is to ditch the FI and go to carbs but I'm too new school and want to try something different. He recently installed a 2005 Yamaha R1 engine in a Sand Sprite and it's been going good for many trips now with no issues! He also has manufactured his own flywheel and adapter plate to fit a 3.5 Isuzu engine into my uncles buggy. Very time consuming and tedious though.
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i would vote NO WAY on carbs. but i get it to a certain extent.....they are easier to setup. but the tunability isnt there. wouldnt run any better than your 4 knob setup.

the tough part about efi on an ACVW is there is SOME bolt on parts for doing this. Specifically, ditch the distributor and put a proper crank trigger on it and a simple cam sync in place of the distributor. then 4 coil packs.

you already have injectors but they are likely ancient Rochester types. ditch those and put modern bosch or equivalent late model OEM injectors in it.

get a modern ECU so you have full control, logging, wide band and so forth.

the other grossly overlooked problem is fuel pressure. good efi only works with ROCK STABLE fuel pressure. something your fuel tank is unable to provide. there are solutions for this as well.
 
daveH said:
i would vote NO WAY on carbs. but i get it to a certain extent.....they are easier to setup. but the tunability isnt there. wouldnt run any better than your 4 knob setup.

the tough part about efi on an ACVW is there is SOME bolt on parts for doing this. Specifically, ditch the distributor and put a proper crank trigger on it and a simple cam sync in place of the distributor. then 4 coil packs.

you already have injectors but they are likely ancient Rochester types. ditch those and put modern bosch or equivalent late model OEM injectors in it.

get a modern ECU so you have full control, logging, wide band and so forth.

the other grossly overlooked problem is fuel pressure. good efi only works with ROCK STABLE fuel pressure. something your fuel tank is unable to provide. there are solutions for this as well.
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Fuel pressure is solid, fuel system is clean as crystal, it definitely has old Bosch style low impedance injectors (60lb/hr) and a locked CB Magnaspark distributor. By the time I spend the money on the ignition system, new ECU, and injectors I feel like I could just put that money towards an engine swap and have miles more of reliability as opposed to the VW
 
trumanbuckley1 said:
Fuel pressure is solid, fuel system is clean as crystal, it definitely has old Bosch style low impedance injectors (60lb/hr) and a locked CB Magnaspark distributor. By the time I spend the money on the ignition system, new ECU, and injectors I feel like I could just put that money towards an engine swap and have miles more of reliability as opposed to the VW
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fuel pressure is solid......lmao........with the car sitting static and a full tank.

now run it down to half a tank, first pass through the whopps.....you have a stew of air and fuel going through your system.
 
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