4.2ltr L67

[JKIDD]

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[JKIDD]

Tuning does that, in addition to the intercooler. It would still make more power even without the intercooler.

what do you think it will make?

 

[shane_3800]

considering the fact that intercooling a stock l67 alone ups the out put by atleast 50-60kw, I think it should be alright.

Like said before more of that is in the tune.
If you have a 200kw engine N/A you add 14.7psi into the intake you will never surpass 400kw at that boost level no mater how close you get the charge air to ambient. Get below ambient that's another story.

 

[JKIDD]

yeah im only asking because im curious.

Just to clarify, all the figures im talking about are including tuning, kind of just assumed that was a given.

 

[Phillbert]

Hi JKIDD, as said already change the pulley size and a good tune.
RWKW? 270 - 320

Maybe start a thread in Show Of Your Ride section with some pic and more info so we can follow the progress of your project.

 

[JKIDD]

Yeah sounds like a plan, once I get it back from the engine reco ill get it back together and take some pics

 

[shane_3800]

Oh sorry I just realised the thread title is 4.2l I based my figure off a 3.8. It should get close to 300rwkw.

 

[_R_J_K_]

what do you think it will make?

IDK, like 270ish maybe. Most of the people on L67Torque that are at around the 300kw+ level seem to be running a Whipple or turbos in conjunction with more aggressive supporting mods and E85. Basing a lot of it on Decicrate's that was getting about 340: https://forums.justcommodores.com.au/threads/decicrates-vs-l67-t56-s-pack.205156/

 

[Immortality]

once ive got it tuned ill post a figure, just wanted to see every ones guesses before I get it done. im hoping for at least 300's ive spoken to a few local tune shops and they are hoping to see 320-350. But we will see I guess. might have to change a few things later down the track.

With a 3" pulley?

A M90 is a positive displacement blower, these type of blowers move X amount of air per rotation. You can spin it faster to make more power, you can increase the blower efficiency by intercooling and engine efficiency by stroking but this only increases power by so much. A stock L67 makes 171-179kw which we'll say is about 150rwkw and are looking for 300+rwkw so you effectively want to double the output of the engine....