T04e On RB20DET

[MM2death]

This is my brothers next project which will be commencing in the next few weeks. I wonder how much power it will put out, but at what cost (lag)?

Looks like it bolts right up to the RB20 manifold he just bought.

Scott

[MM2death]

I wonder how restrictive standard manifolds are on high performance applications like this...

[MM2death]

The exhaust side is...errr....big.

[MM2death]

It should be interesting to say the least. I don't know what he is using for management. What would be ideal do you think?

[MM2death]

Hrmm...it would look good on my car...lol

[MM2death]

Oh, here's the car...

[Jay95R33]

Damn - the exhuast side of that is massive !!

Did it come off a rotary ??

Any idea or A/R etc?

J

[MM2death]

Off rotary. Spot on!

I dunno about the A/R but, i'll have to ask him.

[Steve]

Wastegate?

[MM2death]

Steve, look at second pic.

[Steve]

Ah there it is:D thats a pretty small wastegate, but with such a huge exhaust housing it would probably be fine, so where are you going to fit it on the stock manifold? Or are you going to set it up like Rob77?

With a turbine housing that big, it would probably be a really good idea to get a killer manifold and some cams in there or you probably wont start boosting till 4th gear:p its a bloody monster!

[Jay95R33]

Yepp, I'd expect boost to come in at around 4500rpm or higher on a Rb20...

Rotaries flow massive amounts of exhaust gas - hence why the exhuast side of that mother is so big...

J

[MM2death]

Yeah i said to him you are gonna run into all sorts of dramas...but yeah he said he wants to use the standard manifold and different cams. It might be a good idea to mount the wastegate on the turbo. But i don't know what he had planned with regard to that. I'll have to find out.

Scott

[Fast31]

ditto for the size of the exhaust housing, its huge, its going to be laggy, my guess it will come on above 5000rpm.

where are you going to mount the wastegate

[Steve]

Well, I may as well go for boost at about 6000rpm:), but not until you get to third gear:p Probably wont even need a wastegate:D

Sorry, I'm in a stupid mood

[MM2death]

That manifold is going to kill it i reckon. Need equal length runners.

[Guest MrEscortCosworth]

why have such a huge turbo with such a crap manifold, get a tuned one and you will notice the difference, like running 21psi with stock manifold and then drop to 16psi with a tuned one is a big difference especially when u consider that 5 psi was going back onto the valves, u can run more timing and get more power with less boost. turbo looks great otherwise.

regards Anthony

[Clint32]

Dosent matter what manifold that turbo would not suit a rb20, mine is on the limit size wise and is only the smallest type to4e, it makes fullboost at 4300rpm so yours would be 5000+, not good with little of boost.

Also the turbo would be a tight fit in the engine bay bolted to the stock manifold, so check that as well.

What other mods has he done to the car, in a few months i will be selling my kit, trbo, manifold, wastegate, cooler, pipes, chipped computer, z32 afm, everything to get 230rwkw and 12sec qtr times, for a lot less than would cost to do new.

[Steve]

hmm, selling thermo fans? how about your oil cooler:p

[R32-GTS]

That turbo isnt gonna come on until at least 6000rpm. You would want at least a 3L to spool that up. My exhaust housing is 1/3 the size and doesnt make full boost till 4k.