build my 1.8 or drop in 2.0

[mk2jettaproject]

i am deciding if i want to build my 1.8 and turbo it or put in a 2.0. i have never been a fan of the 2 liter ran the 1.8 in my mk2 jetta and now my fox. mk4 also has a 1.8t but thats a whole different ball game.. if i could get some feedback that would be great.

[Difus]

Is 1.9 an option?

[voxwagen88]

Here's Jonathan's Old Recipe for a 1.85 that should be up to boost.


Engine is 1.7L crankshaft, MC1 pistons, 1.8L block, ported head with the aforementioned stainless 41/34 valves, three-angle grind. Stock 1.8L cam, but we might switch to the shorter duration ABA cam for better midrange and torque. DBG admits that he seldom revs past 5K, so we will try to make the most of that part of the power band.

If I'm right, 1.7L crank is same stroke as Fox (86.4mm) however it use a 46mm rod journal instead of the 48mm like most VW. MC engine (2.2L 5-cyl Turbo) also use 46mm rod journal and also have a 86.4mm stroke and 81mm bore but use 136mm rod instead of the Fox's 144mm. More importantly, MC engine had forged pistons and stronger rods so the 1.7L crank let use the MC pistons and rods into a 1.8L block. This is a perfect low price setup for a turbo engine because it give you a 7.8:1 compression ratio and a stronger block.

[vwturbofox]

i love the 2.0 aba i have a aba short block whith the 1.8 big valve head. also have a turbo on it but then again i hade the motor bored out so it's really a 2.5t but still a 2.0 block.
the 1.8 are good blocks if you want more power go with 2.0 but the decision is yours both have pro's and con's

[Mr Roo]

I would always vote for the 2.0 if you are speaking about the ABA. If you get a good head and nice cams especially if you are going turbo, they are very hard to beat and cheap. I thought the most you could really stroke an ABA was 2.2 and I thought that was a push? Most with the diesel crank and some work on the pistons end up around 2.1.

[90quattrocoupe]

I would always vote for the 2.0 if you are speaking about the ABA. If you get a good head and nice cams especially if you are going turbo, they are very hard to beat and cheap. I thought the most you could really stroke an ABA was 2.2 and I thought that was a push? Most with the diesel crank and some work on the pistons end up around 2.1.

Get an early ABA, up to 95. They had a forged crank and piston squirters. Later ones don't.

Greg W.

[themagellan]

i love the 2.0 aba i have a aba short block whith the 1.8 big valve head. also have a turbo on it but then again i hade the motor bored out so it's really a 2.5t but still a 2.0 block.
the 1.8 are good blocks if you want more power go with 2.0 but the decision is yours both have pro's and con's

Normally with you vwturbofox but you are more than wrong. Your block is NOT bored out to a 2.5 at most you would have a bit over a 2.1.


OP- Look through this dudes build page- http://forums.vwvortex.com/member.php?591528-ChevyAndVW

the full ABA swap is pretty sweet if you can add in a SRI!

[vwturbofox]

Normally with you vwturbofox but you are more than wrong. Your block is NOT bored out to a 2.5 at most you would have a bit over a 2.1.


OP- Look through this dudes build page- http://forums.vwvortex.com/member.php?591528-ChevyAndVW

the full ABA swap is pretty sweet if you can add in a SRI!

sorry wrote the wrong number your right it's a 2.1 not a 2.5 it was bored 50 thousance over