direct injection alloytech!

[dagar187]

hey ppl,just got motor magazine and saw an article about the Cadillac cts in U.S and they use the global v6 in it and managed to get a very respectable 235kws/366nm thru Direct Injection using the alloytec190.Caddy claims 15% more power-8%more torque and 3% better fuel eco.Rumours are the next commodore upgrade in 08 will have this type motor.how sik will that be! oh almost forgot they also mated it to a Hydra-Matic six spd.its too bad they didint mention more specs and details of what they did.

[1991_Vn2nV]

hmmm Those figures regarding fuel economy are pretty poor for direct injection, a few months ago they were saying 10-12% cuts in fuel economy, good power gains there though.

[dagar187]

can u tell us exactly wats involved with di? its a pretty good jump in power,id luv to see those sort of things done ova here.

[J_D]

direct injection just moves the fuel delivery point from the inlet manifold to inside the combustion chamber. The inlet manifold is only used to supply air. The fuel pump, fuel lines, fuel rail and injectors need to be changed to get the higher fuel pressures to pump fuel directly into the combustion chamber. I think Holden has already all but confirmed DI for the next major update of the Commodore.

[dagar187]

thanks j-d.i had a little bit of an idea it was like that.what do uz think about the fuel eco figures only 3%? 235kws is awesome for a 6.theyl have to really churn out the xtra standard kws power of the v8s to make it worthwhile.of course nothing beats the rumble of an 8 naturaly.

[Troy711]

good stuff. the alloytec is a MAJOR let down. the power improvment over the old ecotec (despite being a fairly large number) feels almost non-existant! i think that if holden is going to keep its appeal with 6 cylinder drivers they need to make some changes and do it fast. my dads AU (and BA) tonner on gas went like a V8 compared to my 175 V6.

[J_D]

thanks j-d.i had a little bit of an idea it was like that.what do uz think about the fuel eco figures only 3%? 235kws is awesome for a 6.theyl have to really churn out the xtra standard kws power of the v8s to make it worthwhile.of course nothing beats the rumble of an 8 naturaly.

Well look at it this way your getting about 20% improvement in power AND saving 3% in fuel. Im sure if you detuned the engine you could nearly reverse those figures and get 10-15% improvement in fuel economy and little to no power improvement but car makers always like to improve power over fuel economy, they obviously think people value power improvements over fuel economy.

[andrewmac]

Holden wont release a 235 KW ^ with a marginal fuel consumption increase.
They will increase the power very slightly (prob bout 205 for sports and 190 for standard) and get the fuel consumption lower.
Then as they release newer models the will have worked out how to tune in more power with lower fuel consumption.
Holden can easily raise the power and thrash the competition but they want to keep a fair fight going.

[1991_Vn2nV]

Holden mentioned the figures they were aiming for a while back with direct injection, and it was basicly to bring fuel consumption down 10% which would be around 9.8 or 9.9L per 100km (under the magic 10l per 100 figure) and 15% increase in power so around 220kw for the performance versions and 200kw for the standard engine.

[immortality]

Holden mentioned the figures they were aiming for a while back with direct injection, and it was basicly to bring fuel consumption down 10% which would be around 9.8 or 9.9L per 100km (under the magic 10l per 100 figure) and 15% increase in power so around 220kw for the performance versions and 200kw for the standard engine.

that sounds better then there current line up but they still need something to combat the typhoon turbo 6

[JD]

if they turbo'ed or supercharged the d-i-d alloytec there's no reason it couldnt pull 270-280kws esay if the "sports" alloytec would be around 210-220

[dagar187]

we all just hav to keep talking about these things so holden can see what its consumers want.troys comment about the ford sixes drivn like 8s culdnt be more true.I REALLY thought id feel all the 175kws in the vz.oh well just have to do some tuning to it.

[holden#1]

Would be great to see Holden getting this direct injection thing happening.
It just makes so much sense to dump the fuel straight into the combustion chamber. With diesel motors I have driven with direct injection, they are just so much more fuel efficient than indirect.

[dagar187]

yep for sure.next year hopefully!