16v Cupra

[Water Boy]

My olamn can rebuild it for ya...

[V666]

That would be awesome need to meet up and have a chat etc.

[V666]

Bit more progress not alot though!! removing and labelling harness was a bitch!! almost ready for removal.

[Jarred]

Nice! good to see you're getting stuck in!

[h100vw]

Nice! good to see you're getting stuck in!

Just through the door Jarred and you're all over Watercooled... Well done!

On the Ibiza project, this is the voice of reason talking.... or your dad.... or someone else that has thrown money at projects before.

Without doubt the ITBs will make power, not cheap like carbs but if carbs were that good they would be still in use in F1. For me though, I'd prep the engine, if you feel it needs it. New bearings through out, rings etc. ARP bolts if you really think it'll rev like a motorbike. Obviously, have it all balanced while it's apart, with the flywheel and clutch fitted.(VR6 cover and std disc). Get the head done, ported, cams and maybe go to solid lifters?? I believe you can pull hydraulic ones apart and make up shims to fit inside them.

Next I'd fire it all up std and see how it performs. For cheap money, I'd consider putting a chip in the ECU. Now there's going to be some spluttering at this comment I know. The ABF is alleged to make 175hp with no other tuning apart from a chip. It was detuned to put space between it and the VR6. I had a MK3 16V in the UK and loved it, nice and smooth, revved well, K-jet throttle response, good on fuel.

I can well believe the rumours of the missing 25hp.

See how it goes like that and then get on the case with the ITBs. If you have the time, megasquirt would be good to use IMO. A mate used it on a turbo mk1 he built and he ain't no rocket scientist. He had a mk1 in the UK with a 2.1 16V that dyno'd over 200 on carbs, with schricks and headwork. You can tune it yourself, the use of a wideband lambda probe would make life easy. Innovate do one. I'd lend you mine if you wanted.

Get a book called Engine Management by Dave Walker. Haynes publish it, very good info on starting from scratch.

I think some injectors from a MK4 GTI or maybe a TT would be plenty adequate for fuelling. The std ones may work at a push, with an increase in fuel pressure.


Please shoot down my theories nicely.

Gavin

[V666]

Thanks for all the advice! quite alot to absorb, basically all I need to know is what its gonna take to be knocking on the door of 200bhp and how much I might be able to do myself

[Water Boy]

[Valver.]

I used to have a built 16v Cupra with EFI Hardware throttle bodies quite a while back. I sold it to a guy who owned a Midas store in Brisbane, who later pulled the motor out and fitted a souless 1.8T! I've no idea what happened to the 'proper' engine.

200hp is a walk in the park with the right parts. More compression (there are plenty of nice quality cast pistons, so you needn't spend the big $ on Wossners or the like, and deal with the oil consumption etc), some 27x-28x odd cams with decent lift (11mm odd), headwork (standard valves will flow sufficiently for the target figure), a nice exhaust manifold and 2.5" system.

Throttle bodies don't ultimately raise the peak output much more than 10%, but they do fill in the torque hole you create by raising the peak volumetric efficiency higher in the rev range with bigger cams and larger ports.

I'd forget all of this for now, though. The first thing to do is lighten the flywheel and replace the crown wheel and pinion with a 3.94 or 4.24:1. You'll feel like you have another 30% more grunt after you've done this alone!!

[Valver.]

By the way, dBilas Dynamic make a direct bolt on ITB/chip/airbox/ISV/TPS kit for the ABF engine, allowing standard management etc all for around $2,700AUD shipped, plus import duty. I have one in the post, so will be able to report on what it's like pretty soon

[Water Boy]

By the way, dBilas Dynamic make a direct bolt on ITB/chip/airbox/ISV/TPS kit for the ABF engine, allowing standard management etc all for around $2,700AUD shipped, plus import duty. I have one in the post, so will be able to report on what it's like pretty soon

Wow! (So easy...)

[jayjay]

Does that have the throttles feeding from a plenum which routes to the MAF and IAT? I've been theorizing about how people run ITBs and standard engine management, and that seems like the only feasible way, except for maybe 4 modified individual MAFs and harnesses.

That sounds so cheap and easy though! plug and play!!

[Valver.]

Does that have the throttles feeding from a plenum which routes to the MAF and IAT? I've been theorizing about how people run ITBs and standard engine management, and that seems like the only feasible way, except for maybe 4 modified individual MAFs and harnesses.

That sounds so cheap and easy though! plug and play!!

The ABF doesn't use an air flow meter; it has an internal MAP sensor, which instantly makes things a lot easier. I suppose this is vacuumed straight off the direct-to-head manifold, much like you'd do with brake vacuum. The IAT can plug in anywhere. The TPS functions as the primary load sensor. I'll post some pictures of the kit once it arrives

[jayjay]

that does make things a lot easier.. pics would be awesome.

basically converting to alpha-N using the stock ECU with modified fuel and timing maps, correct?

What about brake vacuum?

or is it more "what about brake vacuum"? (with the emphasis on about)