30-60mph in 3rd times??

[cwspellowe]

Zakk that 30-70 is about 8 seconds mate, speedo picks up at 1 second and hits 70 at 9 seconds. 60 is about 5.5 seconds..

[Arron]

Is that 2.1 with pump mods? Get tweeking!!

Took a 35 - 70 vid, looks under 6 seconds to me but my vids aren't the best quality

[ozonehostile]

the pump on the 2.1 is running max fuel (to the point where the revs are just starting to hang then wound back out a tiny bit), gov mod, throttle arm bent for more travel, heavy lda grind and whatever else dum_dum did to it lol.

when you put your foot down you get a huge wave of torque and goes like f*ck until you reach about 3.5/4k rpm then i just dont think the pump can supply enough fuel as the boost starts dropping off and the torque wave starts to back off.

[Arron]

Sounds like its fairly maxed out bar 11mm then!! Wouldn't the 2.1 benefit from that more than the 1.9 with the longer stroke?

[ozonehostile]

Sounds like its fairly maxed out bar 11mm then!! Wouldn't the 2.1 benefit from that more than the 1.9 with the longer stroke?

il be building some sort of monster pump along with zx_volcane (he sure knows his shit when it comes to pumps ) but yes, longstroke engine should really see the benefits of a 11 or 12mm pump

[Ruan]

You realise that if anything you can get away with a 9mm pump further with a 2.1 vs a 1.9...

[ozonehostile]

You realise that if anything you can get away with a 9mm pump further with a 2.1 vs a 1.9...

care to elaborate mate?

[Ruan]

Think about what the difference between a 9mm plunger and 11mm plunger is - i.e. if you plotted the output of one stroke on a graph over a period of time - what would the curve look like with 9mm vs 11mm...

Why would this suit one engine vs another...

[ozonehostile]

Think about what the difference between a 9mm plunger and 11mm plunger is - i.e. if you plotted the output of one stroke on a graph over a period of time - what would the curve look like with 9mm vs 11mm...

Why would this suit one engine vs another...

so if it was you, would you say uprating the turbo would be a better improvement than more fuel...

[cwspellowe]

Think about what the difference between a 9mm plunger and 11mm plunger is - i.e. if you plotted the output of one stroke on a graph over a period of time - what would the curve look like with 9mm vs 11mm...

Why would this suit one engine vs another...

so if it was you, would you say uprating the turbo would be a better improvement than more fuel...

The 2.1 will make better use of the fuel the 9mm can provide.

Bit limiting factor for 9mm's on 1.9's is injection duration. People upgrade to bigger plungers to allow more fuel for a shorter injection duration. The 2.1 however would be more able to use the injection duration than the 1.9 without spewing all the extra fuel straight down the exhaust...

[ozonehostile]

ah cool, i get it

still, i think more fuel is needed as currently its burning completely clean on boost and just feels a bit, well, gutless compared to the truck turbo 306. could be im just not used to a standard blower yet though lol

[cwspellowe]

The times you posted are definitely quicker than the 1.9, think on my T2 i was only managing 9-10secs 30-70 times. Probably just standard blower syndrome.

I'm assuming you've fiddled with the LDA and gov already, yes?

[ozonehostile]

chris had already maxxed out the pump as far as you can, all ive done to it is drop the ground lda in and that helped the power delivery alot. even gov modded it just doesn't want to rev over 4k, i don't know if thats down to the engine or the pump not been shimmed enough, but it pulls insanely hard until you reach the magic 4k then just goes flat.

boost builds upto 19psi really fast then starts to drop off once the revs go past 3.5k

[cwspellowe]

Sure it's not the standard blower holding it back? Does it start coaling at top end? Bear in mind if the blower won't produce enough boost pressure at those RPM's your fuelling will drop because of the custom LDA too.

[CJ_Derv]

What he said^^^^

---

Truck turbo number 2

[ozonehostile]

it doesnt really coal at the top end, get a slight haze. the same thing happened when on a stock lda pin, putting a modified one in has just made the spool up time quicker and a more sudden power delivery

[cwspellowe]

Yeah I mean more the preload on the LDA. If it's wound up then it'll add to the lack of fuel at top end.

I don't think the 2.1 will every really rev like the 1.9 though regardless

[ozonehostile]

i havnt messed with the spring tension yet, didn't think it would really help. it could rev higher with a lightened flywheel but i wouldnt want to do that as you would lose the awesome torque that makes the 2.1 so fun in the first place. just need to find ways of making better use of the current rev range

[Piggy]

I think the 2.1 wont be as revvy but I dont think if will be as bad as everyone keeps saying...it makes standard power at a higher rpm than the xud9 and the rods are ubber fat...

shall soon see...Im using a lighter fly on mine

but be curious to know how you get on with a diff blower on the 9mm pump....sounds to me you would have more tuneability with a 11mm still

[Ruan]

Everything I know about 2.1s tells me that they're more likely to chuck rods, they're also hydro lifter so good luxk with anything past a few lbs of boost...

There's some good reasons the people tuning these engines dont go for 2.1s, if they were the easy route to power, we'd have gone that way long ago. Theyre an easier route to 160hp than an xud9 but.anything past that theyre more hassle than its worth...

[CJ_Derv]

Again the same misconception of lighter flywheel reduces torque....It doesnt LOL

And exactly as ruan said dont you think everyone would have done this years ago, if you want the torque then slap the crank of a 2.1 in a 1.9 with some shorter rods like im plannin and keep the 1.9 head which is fsr better than the 2.1 IMO but im just going off speaking to others and diesel specialists in the area who told me to stay clear of the 2.1 head as boost will kill them!

Ozone who did your gov mod? I may be wrong but does seem like the gov is kicking in as if it where standard!?

[Piggy]

it is the hydro lifters that worry me

[ozonehostile]

im not sure who did the gov mod, it was dum_dums doing before i bought it.

at the end of the day, i bought it as a reliable car to use for work, yeah more power would be nice but if its going to be more trouble than its worth then il just keep it as it is, its not exactly slow.
il just concentrate on pushing the xud9 as far as i can in the other car

[Piggy]

the way I see it is...no one knew what a xud9 could do till it was pushed...and pushed...and pushed and blown up.

but no one really seems to have found the limits or potential of a xud11...
so why not try?!
I will be. even if it kills it

[Piggy]

just to add my 2p with the 2.1s 30-70.

stats:

2.1 12v. rebuilt.
GT2056s at 1.1bar
11mm hybrid pump...lots left. very clean on boost.
about 15-20% veg too

[silverzx]

just to add my 2p with the 2.1s 30-70.

stats:

2.1 12v. rebuilt.
GT2056s at 1.1bar
11mm hybrid pump...lots left. very clean on boost.
about 15-20% veg too

Can't view it at work damn it! Whats the time dude?

[Tom]

I make piggys 5 seconds. He goes at 2 and hits 70 at 7. Thats quick.

[Piggy]

ah nice one...I aint timed it yet. close to 5seconds would be ace.
be amazing to get sub 5seconds when that turbo gets wound up

[Tom]

Im pretty blown away at how fast that is at such a low psi, the 205 isnt that quick and im pretty sure im up around 30psi on that :/

[Piggy]

...cant wait for 1.5bar!!