Dirtyhabit Build + Perfecting the ND = Change Everything

I assume thats referring to the very fart fatty mcfartfart sound coming from the back end :joy::joy::joy:

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The neighbours will love it :joy:

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That sounds very race car :clap:

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:slight_smile:
Guessing from the clip, but I don’t think that’s revving over 4k. It’s time to drop to idle is very short.

This may kick oit some decibels :joy::joy:

Thanks Aaron for your very in depth thread!

This is a pretty awesome build and certainly quite unique.

A lot more time was spent on the porting / cylinder head work than I had originally planned to spend and due to some immense workload our timeframes were extended to a point which wasn’t expected nor what we personally consider acceptable.

Not only that but I had flu with knocked me out for nearly a week so a bit of a trifecta to add to the delays.

Huge apologies have been expressed regarding this and happy to report the car is running well and due on the dyno early next week.

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Thanks Alex,

And welcome to the thread :slight_smile:

– Car is Alive, and Dyno complete! –

Just waiting for the printout and will share the numbers and graph :slight_smile:
but ,its more bhp, more torque, everywhere!

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Why am I getting Gran Tourismo vibes? :grin:

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Cars back on Dyno tomorrow following some road testing and shake down.

Was going to share the Dyno today, but after discussing with the P.L we think there’s horses still in the stables. They were cautious on the vvt timing and redline.
We are going to keep the redline (7800) but going to explore further timing changes. Also the peak hp is AT the redline, so there’s certainly more if we kept going. But the bottom end is still nd1. Drawing the line for longevity.

But it’s cleared 110bhp/litre from the nd1!
So far …

A bit longer to wait, Dyno and numbers soon

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Hooligan!! :rofl::clap::clap:

Sounds great!!

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DYNO NUMBERS

I think PLink have wrappped it up now? im just waiting for the final overlay dyno. but some headline numbers and screenshots below;

(numbers rounded to nearest whole)

Horsepower - 188bhp to 225bhp@7500rpm = +36bhp
Torque - 150lbft to 170lbft = +20lbft

Some big jumps!
the screenshots show the ā€˜arrival’ overlaid with a 222bhp@7800rpm result. some more messing around with timing on the map yielded more results, and brought the power band a little closer to the left. 2nd screenshot shows this tweaking between 222 and 225

Very happy. I was really hoping to hit 230bhp, but i hit my target for an extra 30bhp, AND didnt sacrafice torque to get it! i was expecting a midrange slump. its hard to see on the screenshot, but looks like a dead flat torque line until 7000rpm!! wow.

Just waiting now to find out if ā€˜ā€˜this is it’’ and the tunings completed. then will be able to publish the pretty graph :slight_smile:

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The ND2 you mentioned previously was mine. So my ND2 with BBR cams I fitted, full stainless exhaust with custom rear box that we made and an Proram air filter made 226bhp and 173lbft.

Interesting that the ND2 head porting didn’t get you a little more, but you got very close to ND2 numbers, so good job. Don’t think I want to be paying your PL bill :sweat_smile:

@CompletelyDriven didnt see you were tracking the thread….
we couldnt quite match ….
ah you just replied as i was typing lol.

….
we couldnt quite match your result, was hoping to beat it :slight_smile: there must be some horses found in that bottom end perhaps.
Looking at the dyno (and im theorising here) the torque in flat until 7000, and then hp peaks almost immediately after at 7500 before dropping.
I think theres a flow bottleneck there…. im thinking intake manifold.

yea i was hoping for some more from the porting. BUT, to compare with the Polish chaps who have records of just the nd2 head swap with cams (no porting), they have results at the 217bhp mark.

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5bhp over the Polish guys and if that came with porting then it was worth it. With N/A builds its hard to get each BHP, so all together it helps. Our exhausts are different, so it can all have a factor on outcome.

Very different engine, but I rebuild a Corvette LS1 V8, put a mild cam in it, but I spent ages porting the both cylinder heads and it made an extra 100bhp. In some ways it would have been good to get a dyno with just the cam and then the porting, but it never works out that way when you have to pay for dyno sessions.

You should be really happy with the outcome and a massive improvement from a stock ND1. I had a turbo NC with 310bhp and yes it was fun and the noises were great, but the N/A nature of the ND is great now that it comes alive at higher revs, is a much more predictable car to drive. Just need to get it to handle now :roll_eyes:

Here is my graph, quite similar as you would expect, dips and rises in the same areas:

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:+1::+1:

I sent this to Alex earlier actually, said our charts look almost identical! Same characteristics.

I love an NA build.

But now I’m this far …. It’s a perfect platform to go far! With a head flowing like it is, and the ND1 fueling and ECU being ā€˜better’ (read as you will…) than nd2, I think my next steps are laid out for me.

Forged low comp pistons / nd2 crankshaft (stronger) / nc gearbox / 4.1 diff…. And supercharger!

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Excellent result. My guess of 5bhp per mod was pretty close but well done @Performance_Link for getting those extra horses.

Diff swap next to get that torque to the ground and tyres,
lots and lots of tyres :grinning_face:

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I bet this will feel amazing.

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Can’t wait to pick it up now. roll on Friday!

My humble little ND1 at 160bhp is feeling humble. Plenty of go in 2nd and a bit in third. Nice usable torque down low at stock but everything just runs out a little bit sooner than you’d want it too. Revs nice but there’s nothing at the top end of the range.

I’ll never fettle though.

a remap will really help the standard nd1 if you like to take to redline. the 6000 - 6800rpm range is a complete dead spot as the stock ecu map closes the throttle to limit you to the factory power. (ive go a thread on that somewhere with the numbers…).
the remap, and nothing else done, may have only given a dzen extra horses but it gave a great reall rev range allowing the car to keep climbing from 6k to 7k.