B204FT -> B234ET need help

[Dr. Evil]

Is it posible to cut 2,0 cylinder block for 96mm pistons?

[foggyjames]

No - the cylinder walls are not thicker on the B200 - it's a different casting.

Do you have a B204 head you want to be rid of? The B234 one is different, of course...

cheers

James

[Dr. Evil]

yes i want 204 head for this motor! I desided tu cut the block from 89 to 96mm. Thare 5mm wall are staying.

[foggyjames]

Why would you want to use a B204 head on a 96mm bore block? The valves are smaller....the combustion chamber is smaller....etc...and the B234 head is much more common anyway...here, at least!

There is enough metal in the bores to take 96mm pistons, but the cylinder walls end up being very thin, and will be prone to cracking, especially in a turbo application.

Why not use a normal B230 block? All you need then is a tensioner from a Volvo Penta AQ171 engine, or I think you can use a VW one...and a timing belt from either an Vauxhall/Opel Astra diesel, or a Hyundai Sonata V6. I'm not sure of exactly which cars the belts come from, but that should give you an idea of where to start!

cheers

James

[Dr. Evil]

There is enough metal in the bores to take 96mm pistons, but the cylinder walls end up being very thin, and will be prone to cracking, especially in a turbo application.

now i know, i already have a hole in the cylinder

today i'll try to make wet cylinder cartriges like B14 has

I already have a head from B204

[foggyjames]

If you want a B234 head, I'm sure I know some people who would like to do a swap for the B204. You can't get the B204 here. If you're going to 96mm, you really don't want the B204 head!

Do you not have B230 blocks over there?

Sleeving it would work...I like your style

cheers

James

[Dr. Evil]

I'm trying to save the block


2,0 liter camshafts on 2,3 liter block prodicing interest effect, engine sturts to rotate up to 8500-9000 rpm

[foggyjames]

I'm not sure I'd try that with a standard bottom end

The PZ cams from a Penta AQ171 boat engine are supposed to be the hottest ones available for the 16v head. The B204 Turbo cams are pretty weak - much lower lift than the NA cams. The B234 and B204 non-turbo cams are the same. Maybe you got some custom ones without realising?

cheers

James

[Dr. Evil]

No I've found this while experimented whith B230

[Dr. Evil]

yesterday i've found some hot rolled metal pipe without welded joint, it has 108mm external diameter and 96mm internal. Iwant to make sleevs from it

[alistairolsen]

I gather there was no 2.3l 16v turbo, but there was a 2l 16v turbo, and a 2.3 16v n/a?

There was also a 2.3 8v turbo? So I assume you use the 2.3 turbo block with the low compression, the 16v 2.3 head witht he big valves, and the AQ cams?

I read earlier about tensioners and belts, what stops you using the 2.3 n/a setup complete?

What do you do about exhaust manifolds etc?

Cheers

[foggyjames]

The first half of your post is totally correct....I'd just add that you have to machine valve reliefs into the 8v turbo pistons.

Convention stops people using the 16v block...there's probably nothing at all wrong with it, but it's a bit different, and has a bad reputation...plus there are some other fitment issues (a different crossmember is needed in a 7/900), but I don't know how this affects a 300.

As for exhaust manifold.....custom. They are available off the shelf, but not cheap. The factory 2.0 16v turbo manifold is no good for a RHD car, and I doubt it'd fit even a LHD 300....plus it's not supposed to flow all that brilliantly, which is the final excuse for getting an aftermarket piece made.

cheers

James

[alistairolsen]

so your shopping list is:

16v n/a head
AQ cams
8v turbo block with low comp (forgd pistons etc as std I believe?)
belt and tensioner arangement
custom exhaust manifold
top hat for the intake?
management and loom since I assume the volvo stuff cant be in any way adapted?

Are there many of these about? are basemaps and stuff freely handed around in this friendly scene or is it a bit more cloak and dagger? Apart from vale cutouts, any gen on other issues?

How well does the 2.3 block fit into the 300?

What kind of power etc are folk getting and in what state of tune?

Many thanks for your help

[foggyjames]

That's pretty much spot on. Only one year of turbo motor got forged pistons here, but they're still good for a lot of power. I'm not familiar with the term 'top hat' when it comes to the inlet manifold. Once you have a 360 oil pump, sump & water pump on the 2.3, it drops right in - it's the same block. The AQ cams are called 'PZ' cams - they're marked PZA and PZI.

Issues....the tensioner is a bit tricky. The neatest solution is a AQ171 tensioner, since the 171 used a standard B230 block with a 16v head...but it's not cheap.

Baseline maps....well you probably could get one, but it takes all of 2 minutes to build one yourself, so it might not be worth the hassle.

As for power....Kenny on Turbobricks just rolled 430whp on his 16vT with a Garrett T4 with about 20psi, standard cams, and a 50 shot. That's easily enough to start grenading bits of drivetrain.

cheers

James

[alistairolsen]

Which year came with forged?

top hat - on vauxhalls the TB flange points up in a bolt flange, with an airbox on top, so you bolt on a flanged bend to attatch the boost pipe to. Dont ned it with a conventional round TB.

The 360 bits I assume can come off a b200 or a b19?

are the aq cams available new and at what cost, or where do you get them? Despite being well into boats and having a couple of aq130 b20s downstairs, I dont see many in scrapyards!

how much is the aq tensioner? Whats the problem with the tensioner off the n/a 2.3 16v motor?

by basemap I didnt mean idles and runs ish, I meant someone elses map for a certain spec, so it only needs very minor tidying maps in the vauxhall scene float about fairly freely.

Whats the limit of the gearbox/diff in the 360 before you start killing it, from torque out of corners, not hard launching?