My long promised blog

[h701micra]

Bought a whole almera for not much more than a K11 4 branch...

Still selling that rear axle

If you do the mandatory porting to get the flow up ob the exhaust to a similar number to the SR and CG we gain a few horses and torques again... And that's only bringing the engine into a level playing field

 

[Enuo]

Ok so changing to be more realistic

So works out at a measly 84kg or so heavier (assuming SR+box is 204kg)
Say a 800kg K11:

Cg=75/0.8= 94bhp/tonne
GA=100/0.884=113bhp/tonne

Seeing as without cams etc a CG runs out at about 94bhp, GA makes a lot of sense, especially if you can fit it with about 5 mins worth of welding
Edit:
Cg+ intake and 4branch =94/0.8=118bhp/tonne (and WAY less torque). Bought a whole almera for not much more than a K11 4 branch...

 

[h701micra]

Ok so changing to be more realistic

Well if I weigh my gearbox and get a rwd gearbox weight off them we can make more reasonable calculations
Still appears to be worth 5 mins of welding

 

[Enuo]

Still selling that rear axle

If you do the mandatory porting to get the flow up ob the exhaust to a similar number to the SR and CG we gain a few horses and torques again... And that's only bringing the engine into a level playing field

The shell is being swapped for some FIA spec harnesses, chappy is gunna make it a grass tracker so gotta leave it on. Still got the rear disks and calipers though

 

[frank]

CG +t is nice and light with bucket loads of torque

 

[h701micra]

CG +t is nice and light with bucket loads of torque

Any idea on a weight Frank?

With my theory of CG basically being a reworked GA... the torque figures would make sense

 

[Enuo]

CG +t is nice and light with bucket loads of torque

The GA moves 200kg more at the same rate, think the GA has the edge when it comes to torque

 

[frank]

Any idea on a weight Frank?

Fraid not andy

 

[h701micra]

Fraid not andy

Ah bummer. Well if you ever feel the need to weigh an engine

 

[McMicra]

probably bout 50-70kgkg heavier I would assume? Main weights gonna be the turbo and intercooler?

 

[h701micra]

Neither power or torque seem to wanna drop off on a GA+T

 

[h701micra]

@enuo... I cant get a GA+S graph :/

 

[frank]

probably bout 50-70kgkg heavier I would assume? Main weights gonna be the turbo and intercooler?

the +t has,nt added any weight on mine, the turbo is probably lighter than the primary cat that was removed/replaced with, the side exit exhaust is half aluminium, and no intercooler

 

[Enuo]

the +t has,nt added any weight on mine, the turbo is probably lighter than the primary cat that was removed/replaced with, the side exit exhaust is half aluminium, and no intercooler

I've seen 139 for sr20de, 149 for sr20det

 

[Enuo]

@enuo... I cant get a GA+S graph :/

I'm guessing it'll be almost exactly the same as without the SC just bigger numbers

 

[frank]

I've seen 139 for sr20de, 149 for sr20det

i could buy that andy mine has no flanges or cast elbow tho eh (this is no heavier than a stock mani/cat)

 

[h701micra]

I've seen 139 for sr20de, 149 for sr20det

Is this plus gearbox?

 

[Enuo]

Is this plus gearbox?

I don't think so, but the micra gearbox can't weigh more than 30kg or so

 

[h701micra]

I don't think so, but the micra gearbox can't weigh more than 30kg or so

So we'd say 100kg for cg and 110kg for cg+t?
The ga gearbox is 42

 

[Enuo]

So we'd say 100kg for cg and 110kg for cg+t?
The ga gearbox is 42

Custom builds vary too much, can only really go by stock weights

 

[h701micra]

Custom builds vary too much, can only really go by stock weights

They'll go up at the same rate as each other I'd presume

 

[Enuo]

They'll go up at the same rate as each other I'd presume

Frank just said his turbo+ mani weighs same as stock mani

 

[h701micra]

Frank just said his turbo+ mani weighs same as stock mani

Pretty sure it was just his mani that weighed same as stock?

We'll stick to N/A stock figures

 

[Stani1029]

Neither power or torque seem to wanna drop off on a GA+T
View attachment 26697

Whos is this and whats the spec?

 

[frank]

Whos is this and whats the spec?

my neighbour dale stani, was very laggy (50hp @3200 eh !) he did,nt keep it long

 

[Enuo]

my neighbour dale stani, was very laggy (50hp @3200 eh !) he did,nt keep it long

80 odd lbft though (near stock peak torque), looking at the torque curve it would have been happier in a lighter car

 

[Stani1029]

Wasnt the graph from his ga14 though? He made more than that out his ga16+T

 

[h701micra]

Very laggy indeed. I'll grab one of the other det GA graphs that shows them in better light

Hp is nothing without torque though

 

[h701micra]

Wasnt the graph from his ga14 though? He made more than that out his ga16+T

It was a ga16 with ga14 gearbox that one. Wasn't too heavily modified in comparison to others

 

[frank]

80 odd lbft though (near stock peak torque), looking at the torque curve it would have been happier in a lighter car

mine had 80lb/ft @2100 rpm tho andy (pre-nistune/stock ecu) and baguete,s (nistuned) @ 1500 rpm

 

[h701micra]

mine had 80lb/ft @2100 rpm tho andy (pre-nistune/stock ecu) and baguete,s (nistuned) @ 1500 rpm

But whereas these drop off torque pretty much as it peaks.
A GA will climb in torque and hold its peak torque throughout

Edit: the second graph shows that 80lb/ft isn't reached until 3250rpm?

 

[frank]

Edit: the second graph shows that 80lb/ft isn't reached until 3250rpm?

108nm innit

 

[h701micra]

108nm innit

That's where I'm looking

Unless I've missed something?

 

[Stani1029]

Ive just had a read at dales blog and he says that graph is from the ga14 engine and not long after he broke a piston. Then he built a low comp ga16 for it and run a little more boost and made 193whp

The extra 200cc in my eyes would see him the added 30hp at the wheels

 

[h701micra]

This graph?


Fair enough Stani
I read it as 190 odd at the fly
160 at the wheels

 

[Stani1029]

This graph?
View attachment 26701

Fair enough Stani
I read it as 190 odd at the fly
160 at the wheels

Yup ga14 turbo at 0.8bar, it broke to which he then forged, run 1 bar and got 193@wheels

No idea why it says 1.6 on the graph

 

[h701micra]

No idea why it says 1.6 on the graph

No me neither :/

 

[Stani1029]

 

[h701micra]

I've got em all saved in my reference folder

Impressive to know that a GA16 can handle almost as much power on stock internals as an SR (de)

 

[h701micra]

@enuo that can get us going?

 

[Enuo]

View attachment 26719

@enuo that can get us going?

Need to see the whole thing ideally

 

[h701micra]

Need to see the whole thing ideally

Bare with me...

 

[h701micra]

Need to see the whole thing ideally

 

[h701micra]

Walk into shed... this stares at me

Love it

 

[h701micra]

@enuo I have 2 photos for you

 

[SuperK10]

Keep it up.......

 

[h701micra]

Keep it up.......

Will do
Yours fixed?

 

[SuperK10]

Will do
Yours fixed?

On going.......

 

[h701micra]

Nissanubaru isn't taking all the limelight... I'll make sure H701 still puts up a fight.

The twincharged GA16 will be ready in time for the track day weekender. Which gives me time to refine it. And push it a bit more

 

[baguete]

Edit: the second graph shows that 80lb/ft isn't reached until 3250rpm?

That was when i finished the SR20 MAF and SR20 370cc injectors setup, with retarded dizzy to compensate the agressive timing map, @ 0,7bar. Have the timing map sorted now with more timing at low revs/load and 15º base timing.

You are seeing power curve with 80hp at 3250rpm, you must see the torque curve, 110nm at 1500rpm.