Mk1 16v Project

[gtimk5]

This is an awesome thread! Thanks Chris for showing us all the ins and outs of building a bulletproof motor.
Thanks,
Andrew

[Preen59]

Yep. I've had one since 2000. I brought the engine basically brand new with only 30K on it. It's also the AGU big port one.

I had it fitted into my 83 GTI around 2001/02 which if I had it going would have been the first out here I think, but other stuff came up & it got put on the back burner.

Also have a GT3076R (.82 A/R exhaust housing), 38mm Tial wastegate, billet fuel rail, etc. Just need coin for some rod's, piston's, cams, 630cc injector's, fuel reg, ECU & exhaust.
Everything else is there.

I was originally chasing 240fwkw's, but have been advised with the setup it should easily make nearly 300fwkw's on about 26-28psi. My plan was if I could blow the tyres off at 80km/h, I'd be happy.
Well maybe alittle more than happy.

VERY nice. Even though i don't like turbo engines, i respect the 20vt. Bullet proof engine and a very nice head and block. I'd love to build a blown one on alcohol.. Mech. Injected ofcourse!

If the torque plate will fit you're more than welcome to have a lend of it. I'll even turn up the stud spacers for you, if you give me the face to face distance.

[Preen59]

This is an awesome thread! Thanks Chris for showing us all the ins and outs of building a bulletproof motor.
Thanks,
Andrew

Thanks mate. Now you know what those bearings you sold me a doing..

[twin eng, twin turbs]

Good to see my 1.6 bolt worked a treat on your threads. Oh to be at electrolux again with time to do any machining you like... The torque plate will fit a 20vt im 99 percent sure.

[Preen59]

Good to see my 1.6 bolt worked a treat on your threads. Oh to be at electrolux again with time to do any machining you like... The torque plate will fit a 20vt im 99 percent sure.

Not anymore dude. I do most of this stuff in my own time. Especially at the moment. One of the press operators at the door line put a clamp in the wrong spot and entered the new door skin die, the clamp fouled, and BANG, it broke the side out of 2 dieblocks and smashed 3 punches. So Matt and I have been flat out making new die blocks and punches. Cream. But atleast i still have all the equipment available to me.

[Preen59]

Small update.

Spoke to Bonk today and he said he should have my head done by the end of next week. He said he is very happy with the way it flows and very happy with the ports. Apparently it was pretty good straight up and all he has done is open the exhaust ports up a bit and straighten up the inlets. He has cut the seat throats out and recut the seats for the bigger valves too, ofcourse. Anyway, i'll post pics when I get it back so you guys can have a look.

By the way Stu (Valver), tell me how it looks compared with your ports in the turbo ABF. I know it's a different application and you'll probably have much larger exhaust ports (and possibly more volume behind the inlet valves?), but i'd be interested to know what you think, considering you have a proven engine (well, dyno wise anyway).

[Valver.]

By the way Stu (Valver), tell me how it looks compared with your ports in the turbo ABF. I know it's a different application and you'll probably have much larger exhaust ports (and possibly more volume behind the inlet valves?), but i'd be interested to know what you think, considering you have a proven engine (well, dyno wise anyway).

I've got a load of flow bench figures somewhere, so it'll be interesting to have a look. What valve sizes are you going up to? Mine are standard in the 16vT head, but with really nice porting so it'll be interesting to see what figures you can get

[Preen59]

I've got a load of flow bench figures somewhere, so it'll be interesting to have a look. What valve sizes are you going up to? Mine are standard in the 16vT head, but with really nice porting so it'll be interesting to see what figures you can get

.5 OS inlet and exhaust. I don't have an air pump..

I'm pretty sure Bonk's flow bench isn't computer controlled. I think he made it himself with a U gauge etc. I'm not really sure as i've never seen it. Actually i've never had to chance to have a good look at a proper flow bench before. I understand all the flow characteristics and what does what for flow/volume/atomisation etc but as far as knowing what a "good" figure is for a specific engine i'd be lying if i said i knew. Most of my engine experience comes from 2 strokes (Karts) from years of testing (and recently building) engines with my engine builder, so i have a good understanding of everything, but i'm still learning with car engines in terms of head design etc (heck i'm still learning with kart engines).

[twin eng, twin turbs]

Ill have to check out bonks handy work on your head aswell, after seeing what he did with matt's GSR head it should be the impressive but not overboard. His flowbench is a good setup, not bad to have in your shed at home!

[Preen59]

Ill have to check out bonks handy work on your head aswell, after seeing what he did with matt's GSR head it should be the impressive but not overboard. His flowbench is a good setup, not bad to have in your shed at home!

Ok, but for a private show it'll cost you a pineapple.