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[JesperKjeldsen]

Lets face it, the 2,5v6 is a bit underpowered considering its size (displacement).

so im considering the superchargerway, mostly because averybody else uses turbo.

but now i need some pros and cons. I know its a big rebuilt, but I think im up for the challenge (yes im a mechanic).

so far ive come to this:

stronger rods (possible from a saab or custom made)
lower compresion (+3mm steel head gasket)
eaton m62 or m90 supercharger (max pressure 0,5bar boost controlled)
intercooler from wv transport tdi
ecu remap
engine coolant thermostat max temp 70 degrees celcius
elektric waterpump (to keep the water flowing faster)
headers from bestmufflers.com
cams from 3,0v6
steel pressure pipes.
5w30 sunoco/valvoline racing oil for the engine.

THE GOAL. 280 - 320hp and whatever  torgue it brings hopefully over 300nm

brakes,supesion and so on is already converted to steinmetz kompressor specifikations.

have I forgotten anything?

[JesperKjeldsen]

http://www.youtube.com/watch?v=q6G15IcUgDc

[JesperKjeldsen]

also I need af wood look stering wheel and wood look center console for a car without climatronik

[Kevin Wood]

I would just drop a 3.0 / 3.2 in, to be honest. It's a good increase in power over the 2.5 and is proven to be 100% reliable, unlike most attempts to fit forced induction to a V6.

If you still need more power, then at least the 3.2 has a forged crank. There's no point in throwing money at tuning the smaller engine, IMHO.

[JesperKjeldsen]

the rules for an engine swap are hopless in denmark.

[Kevin Wood]

the rules for an engine swap are hopless in denmark.

<crosses Denmark off the list of destinations for possible emigration>

Shame, I like the place!

[cem_devecioglu]

JesperKjeldsen,
 
here is my experience: 3.0 cams+3 ECU and port polishing on heads gave around 40 extra hp..
 
I had it measured on dyno before and after (car manual with 3.90 diff)
 
it was around 143 hp before and 188 hp after
http://www.omegaowners.com/forum/index.php?topic=113674.0
 
now you can play with bore sizes (thats the way most mechanics here prefer)
           bore      stroke
2.5_____81.6___79.6
2.6_____83.2___79.6
3.0_____86_____85
3.2_____87.5___88
 
and if you want you can change the crank also to 3.2 (have longer stroke) if you wish
http://www.omegaowners.com/forum/index.php?topic=106188.75
 
and also calibra forged pistons match the purpose (have various sizes)
http://realstreetperformance.com/store/je-pistons-k1-h-beam-forged-rods-opel-astra-calibra-c20le-c20let-3392.html
 
 valve sizes can be increased..
 
 from what I read supercharger is more suitable for omega.. but you'll need custom pulleys .. their ratio will determine your induction pressure .. you can find from graphics at eaton website..
 
you will need external oil cooler ..
 
and most important uprated bottom end parts.. I have seen somewhere else if I can find I will share..
 
 
 
 
 

[cem_devecioglu]

and if you dont mind remove all AC parts and condenser..

[pirate]

steinmetz supercharged the 3.0 litre and im sure that apart from crank and a different head gasket not much else done to engine from what ive gleened from the ones in germany and poland.they made over 300bhp.i had a 3.2 and was going down the route of blower but costs and life got in the way.my steinmetz is only a 2.5 but has been cammed and has cortney motorsport air filter and with the full flow exhaust is alot better but as she weighs in at .1.9 tons a saturn 5 rocket would be needed to shift it like a hot hatch,im now thinking NOS. ye ha

[cem_devecioglu]

these arp bolts (for bottom end) seems really strong but wiill require some machining I think (3rd picture)
http://home.comcast.net/~robert_crow/V6%20buildup%20pg5.htm
 
plus things I forgot..
 
wideband lambda , some installers also use map sensor instead of maf with custom ecu
higher flow injectors and uprated fuel pump.. ( not sure this will be required for  0.5 bar app)
 
and you may need an uprated clutch set..

[omega3000]

[symes]

+1 madness

[cem_devecioglu]

    yeah.. lots of it required

[Webby the Bear]

Cem, out of interest.... with all that bore/stroke size increases what sort of extra power would that give... instead of BHP cos ill be honest but that means nowt to me... what can the real life improvement be i.e. 0-60 time, top speed increase etc?

 

[cem_devecioglu]

Cem, out of interest.... with all that bore/stroke size increases what sort of extra power would that give... instead of BHP cos ill be honest but that means nowt to me... what can the real life improvement be i.e. 0-60 time, top speed increase etc?

 

the exact answer will be very complicated and depends on a lot of factors I'm afraid.. but shortest route is to make road test/dyno
 
 
when you play with bore snd stroke you are increasing the engine volume.. however, if you polish inlet and  exhaust ports the effect of increasing internal volume will increase obviously.. if you also play with cams and valve sizes , the bhp gains will be much more.. and a re-map will add on top ıf this..
 
theoritically you can get another extra 40-50 hp (may be more- assuming no forced induction ) on a 2.5 (at the crank) .. this makes 0-60 approx  1.5-2 seconds faster in real life..  but top speed wont be effected too much imo as its dependant on gear and diff  ratios..
 
ps: I'm assuming those mods are done on a manual.. as estimating the amount of autobox losses is very hard..