kpr

Yeah if you do the math on the  bara torque numbers   is making 173hp at  3250rpm.   which is pretty much peak power for the l67.  so can see how the barra would spool turbo way sooner

So yeah look at the power rather than engine size if comparing

Just looking at the plusar page  maybe something like this would be better suited.  dont quote me on it haven't looked into it too hard..  https://www.pulsarturbo.com.au/collections/gtx-gen2/products/pulsar-gtx3071r-gen2-turbocharger

either way it'l go heaps better and probably more reliable with turbo over supercharger. since more stress on engine to make same power with supercharger

Thats a lot of turbo for an L67.     a  gtx30**    would probably be better suited.    remember the NA  barra makes decent bit  more power than an NA L67.   Which directly effects how much power it will make turbo  and how well will spool the turbo

worst bara numbers i found:

Power: 182 kW (244 hp) @ 5250 rpm
Torque: 380 N⋅m (280 lb⋅ft) @ 3250 rpm

moo numbers

177 (hp) Horsepower at 4800 Rpm
320 Nm @ 3200 Rpm | 236.02 lb.-ft. @ 3200 Rpm

In a perfect world should make double the power on 1 bar boost ,can usually get close on a good setup.   turbo not supercharger, they are horrible

bara  - 488hp

moo -  354hp

Pretty close, but bad day for peaches (red)     noodle (blue) and cones pretty much the same.   maybe the cones by a touch

On 15/12/2021 at 15:05, GARDRB said:

Could you test different intake setups with some sort of smoke machine without detriment to combustion?

Put a smoke machine by the drivers side guard and see how the air flows into the different trumpets?

Also, @kpr do you want an old 32" TV for the dyno? I've got one in Kamo and could give it to David T to bring out to your place sometime.

Cheers for offer re tv.   will pass though. the crappy little crt fits with my shed tetris at the moment.

Not sure about the smoke thing,   since engine is consuming something silly like 7000L per min,  likely  wont see a lot unless have lots of smoke.

Not the best example,   as length was slightly off.   but can see on the skinny blue runners.  how they fall over up top, with only minimal gains down low.

Pretty much everything ive tired diameter wise,  to make a gain in the bottom end,  will take a big hit in the top end. 

Waay more forgiving going oversized.  example being something  completely silly like the noodles.  they hardly loose anything down low.

bends dont really have any effect, probably a tiny bit in it if your runner size is borderline already.    your average long radius bends are fine.   those cast aluminum elbows are a bad day though.  somewhere on my youtube i tested them

About 1 million people have asked me to test dimpled ones.  haven't had any sent my way yet though.   

I just figured it out,  they spin the wrong way for the southern hemisphere.

but yeh,  been taking to  @Roman about it.   I might do some butchery, to see if can get them to work any better.      I think making the slots bigger would be the first thing to try.  cutting a hole in the end would kinda defeat the design

Looks like it's hanging on really well! 

3 hours ago, shrike said:

9k is probably manageable (just?) Is it still making power and not peaking at 8500? ( next up dyno chart showing it off a cliff at 8600 )

What do you think the weak link will be next?

Rod bolts? 

Oil system keeping up and bearings letting go? 

Oil pump failure 

Clutch? 

10k I'm not so sure If serious lol

Liked your porting comment assuming it does widen the curve and increase midrange sounds good. Part of me thinks yes the cfm required will increase at lower revs due to less intake restrictions but the exhaust will still limit it. Not sure how much you'll pick up or how much wider to start.

 

Judging by his fuel map and having vvt.  It should at least hang onto peak power for quite a few more rpm.  

9 hours ago, Testament said:

did noodles trump peaches?

looks like it could go either way. I'll have to resurrect the peaches

That would be amazing

Yeah will run them all at same length.   so all the 75mm ones will have the ali extendo bits on them, which as a small taper inside

the long blues  aka "2. big straight blue lagoon"   are  actually made for silvertop throttles,  so they a bit skinny compared to everything else.  i just butchered the flange off the end.

1 hour ago, deankdx said:

i will go for the long straight blue ones first, then the weird blue ones, then green because.. different also. 

i was talking to a Cylinder Head reco dude(age 65 he was at the time) about match porting to the manifold. and he said some instances a poor match where particularly the exhaust port being smaller than the pipe/flange (aka bigger pipe than the port) helps with preventing a reversion effect(expanding gas though)

would any of this translate on intake runners?(stepped runners smaller diameter than the port)

Yeah depends on the sizes.  Port matching in most cases is pointless and in some will make it worse.  Good example of this is  my current junker engine. Has bigport head with itb setup designed for smallport just  bolted straight on.  Most people would lose there shit at the massive missmatch. But it actually fixes some of the sins of the oversized ports.  If tried to make the manifold match the port size with a nice slow transition, it would be worse

2 hours ago, ThePog said:

In order of best to worst;

Big White

Small white

Green swirly

Conduit

Small Blue

Blue Amazing

dont forget about the noodles! They are my only hope since no 3d printer 

@zep   that chart i posted was trailgear stuff.  if got 2 short side rock assault, would  be at a guess 1300 ish wide.  which probably too short?

what length do you need?   have you looked into aftermarket 4wd stuff?  maybe something that you dont have to get re-splined

Yeah easy. That part of the axles isn't hardened.  You'll also need to watch out with the 6 stud ones the back side of axle flange too big to fit a smaller pcd. So will need to be machined smaller to fit the studs in.   I recall way back my cert guy wasn't happy for that part of axle to be machined. I don't know If thats actually a thing or not. But maybe worth finding out first. Some of the hiace ones are also quite long

Yeah so basically insignificant. I stand by my half track burnout making your car faster statement.   

After many years of playing with stuff. If you need big compensation  your setup sucks mechanically, your car is on fire or you have a efi 4k