Twin charged AW11

[Millhouse1]

Pretty cool vid .... https://www.youtube.com/watch?v=hy8OfoqvVFs

Would be crazy quick

[Alsw20]

Twin charging belongs in the 1980's.

Turbocharging has come so far in the last thirty years, you can get amazing boost threshold along with massive top end power.

[MR2GUY]

agreed, twincharging is overly complicated and inefficient if not done right. modern turbos or twinscrew compressors are a much better option in my opinion. but hey its pretty different

[Millhouse1]

Yeah I wasn't referring purely to power output. Just that it's different and more novel than just chucking a big turbo on it.

[ptayler56]

Twin charging belongs in the 1980's.

It's never been very common, but VW were still doing it in production cars as late as 2010? https://www.carthrottle.com/post/volksw ... its-maker/

Modern turbo's are great, but you'll always have either low down lag or run out of puff at high revs with a single turbo (can't have it both ways) - perhaps twin turbo can help, but certainly an interesting option is to supercharge for low down power and turbocharge for high end to get the best of both worlds

[JasonFriday13]

What about a compound setup? Yeah there is some lowdown lag, but the big turbo spools up much earlier because of the quick spooling small turbo. I've seen pressures passing 40 psi at 5000 rpm with a compound setup, Paul Volk and his Mitsubishi Eclipse is the example I'm referring to.

[Mike n Rochelle]

I started a 4agzte builders page on facebook a while ago as I found a few like myself building these motors. There old hat but thats half the fun as they are an old school car so why not go old school with the forced induction

[ptayler56]

Tried looking for that facebook page but couldn't find it. Would be keen to find some more info from there, got a link? Thanks

[Statek]

Tried looking for that facebook page but couldn't find it. Would be keen to find some more info from there, got a link? Thanks

https://www.facebook.com/groups/1530394 ... 5/?fref=ts

[Mike n Rochelle]

Yea I probably should have thought of that myself.

[feral4mr2]

Twin charging belongs in the 1980's.

Turbocharging has come so far in the last thirty years, you can get amazing boost threshold along with massive top end power.

hi, over the past 20 years i've had every 16 valve variant of the 4ag engine in my aw11's.

the twincharge idea is ancient yes, but is still widely used through the world because of the drivability of the setup, not total hp output.
the 4ag can make awesome power from a turbo conversion, but a higher output turbo conversion as much fun as it is once spooled still suffers from lag, even with the cool ball bearing turbo's of today.

really it all depends on what the owner/driver wants from their car, i've recently gone from an insanely quick spooling little gt2554r 4agte to another twincharger setup, i'm not after massive power (wanted more than i had) but i want a good torque curve for the gymkhana and track days i use the car for.
i'm only shooting for ~250 - 270 rwhp, but want a useable torque curve basically from low rpm to redline that will help me shoot out of the corners passing the larger cars that aren't as nimble, but have enough hp to keep me out in front down the straights until the next corner.
the little gt2554r was great for corner exits, but the upper hp limits of the setup showed with larger top end faster cars.

hopefully i'll be able to get the new setup to the city soon and get it tuned properly, it's a bit scary trying to do it on the road.