33 replies to this topic

[siztenboots]

Looking at what Klasen motors have done , and what I can tell its the Z22XE ( mainly used in omegas ) crank , rods

 

[vocky]

I think GM also made a 2.4 version for the Frontera

[larres]

User cs_ from this forum drives such an engine.

 

[Nev]

The thing is, I bet he has got the extra CC by lengthing the stroke rather than widening the cylinders... not such a good idea for a high revving "sports car" engine. Even with a mid sized turbo or supercharger you'd want to rev it to at least 7500 RPM and the longer stroke (if it is configured like that) would oppose that to some extent.

 

Yep, I know Carsten, but can't remember what state of tune/engine he has at the moment. Maybe he could comment on here to give us some info

Edited by Nev, 06 September 2013 - 01:45 PM.

[siztenboots]

there is also the Brazilian 2.4 , X24SFD

 

comparison of x20xev and x24sfd piston

[siztenboots]

few more details

 

stroke 2.2= 94.6mm , 2.4=99.98mm and the piston, height of compression on 2.2 is 30.41 and the 2.4 is 27.3

2.2L 148mm conecting rods, and uses the standard c20xe pistons in compression height.

 

2.4L has same conrods, different pistons

 

compression ratio is 9.6:1 on 2.2 and 10:1 on 2.4

 

[siztenboots]

in terms of revs, and the mean piston speeds

 

@7200

2.2 , 94.6mm = 22.7m/s

2.4 , 99.98 = 24m/s

 

@7500

2.2 , 94.6mm = 23.65m/s

2.4 , 99.98 = 25m/s

[Nev]

in terms of revs, and the mean piston speeds

 

@7200

2.2 , 94.6mm = 22.7m/s

2.4 , 99.98 = 24m/s

 

@7500

2.2 , 94.6mm = 23.65m/s

2.4 , 99.98 = 25m/s

 

25 m/s is fast. That's which it's nice having the square stroke in the Z20LET, I can "safely" rev mine to 8000 RPM to eek the max out of the mid sized turbo (which puffs all the way to 8000).

[siztenboots]

a 2.4 would help spool up the turbo earlier

[siztenboots]

the Astra H in Brasil from 2004–2009 had the 2.4l flexpower , its just the crank we want

[siztenboots]

very hard matching up engine codes , but the x24se seems another  , possibly in the Daewoo stuff.

 

anyone know about the 2.4L in the Opel Antara / Chevvy captiva ?

[siztenboots]

this is the head, and that looks same as ecotecs

 

[siztenboots]

i think engine code z24sed

[Nev]

this is the head, and that looks same as ecotecs

 

 

Goodness those valves look titchy, must be a low down torque configured engine. Looking at it (admittedly its a poor pic) it doesn't look good for high revs and good breathing at high revs.

[cs_]

The thing is, I bet he has got the extra CC by lengthing the stroke rather than widening the cylinders... not such a good idea for a high revving "sports car" engine. Even with a mid sized turbo or supercharger you'd want to rev it to at least 7500 RPM and the longer stroke (if it is configured like that) would oppose that to some extent.

 

Yep, I know Carsten, but can't remember what state of tune/engine he has at the moment. Maybe he could comment on here to give us some info

 

In fact, I took the photograph shown above, this is my engine in my garage in late 2011, being prepared to come into my car.

 

The state is: it runs well for some 18 months now. It is equipped with a NG2-Turbocharger (basically a beefed up LEH turbo manifold with a K16 core assembly, custom design by some guys from 3K), a bespoke Tullett 3" exhaust for the taller engine (block build some 10mm higer) and lots of custom stuff, most of it my own concept (f.i. lowered top hat). Engine develops some 383 PS (aka 370 BHP) according DIN measuring. It has done some 100 starts on quartermile this far, 5.000 km normal road driving, some short max speeds of ~280 km/h (~170 MPH) and some mild stints on race tracks. And it is still good as it was the first time it has been ignited.

 

The conversion was not cheap anyway, the whole story cost about 20k Euros including bigger oil cooler with braided hoses, custom inlet pipe with big K&N 3680 filter, gear box service with Quaife diff lock, custom fire extinguishing system, custom instrument console and lots of big and small parts.

 

Unfortunately I cannot say the 2.2 really pays off. The engine has it's positive and negative attributes:

 

(-) Critical piston speed comes in at earlier RPM, you just cannot rev this long stroke engine as high as a 2 litre. Got my limiter set to 7.050 RPM for being on the very safe side. Klasen states the engine can cope 7.500 easily. Perhaps I will let it raise to 7.200 in the future to get better continuity shifting from 1 to 2 on quartermile.

 

(-) It costs 1.000 Euros more than the 2 litre.

 

(+) Though running Klasens high stroke cams, the engine produces significant power on mid revs, 170 PS @ 3.000, 250 PS @ 4.000, 340 PS @ 5.000 and 380 PS @ 6.000. You can drive it much like an LEH engine and push the throttle in fifth gear at 80 MPH being nearly as quick up to max speed as if you shift back and rev the gears 3 to 5 to their limits.

This might be the real effort of the larger displacement.

 

(+) Engine lusts for revs. The power development is much more progressive than the ones of the usual Z20LEx's. Uwe Regelin made the mapping and when test driving the car on the autobahn he commented "some few moments later the shifting lights flashed and I wanted to get into fifth - recognizing I was still running fith gear". This happened at around 277 km/h and the car just wanted to go for a sixth gear, standard turbo gearbox was too short now.

 

The conclusion for me: the 2.2 is a nice thing to have, especially because it's the only one that exists in the VX220 from my knowledge. It's a very unique drivetrain I made there, an experiment with a happy ending. On the other side the 2.0 would have been much easier and cheaper to set up and would have produced the same max power. It's a conservative setup I made. Wanted a good drivability on normal roads and got that, it drives like a good made stage 3. Garrett conversions are capable to produce much higher output but you pay for that with turbo lag that I do not want for my car. A bit frustrating on the quartermile, but very rewarding passing other cars in slippy conditions on rural roads or race tracks.

 

Would I do it again? No, I think my next engine would be a 2 litre. Because of the max revs topic. But I am happy with the engine as it is.

[cs_]

This is the engine these days:

 

And this is the car it is running in:

 

[Nev]

Thanks for the honest feedback Carsten. As with all modifications, there are positive and negatives.

 

[siztenboots]

carsten can you recall the piston bore dimensions?

[cs_]

Equivalent to the 2 litre: bore 86 mm, stroke 94.7 mm

Edited by cs_, 07 September 2013 - 07:17 AM.

[vocky]

 

anyone know about the 2.4L in the Opel Antara / Chevvy captiva ?

same engine family as the z22se, I have a crank from a chevvy 2.4 in mine

 

So no good for the z20let engine family.