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PostPosted: Thu Dec 12, 2013 5:31 pm 
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Joined: Thu Apr 23, 2009 9:39 am
Posts: 36
Thanks again for the kudos guys - I haven't been very active in the datto scene but my car has slowly been getting to a point where I'm happy with it so thought it was time to share. Hope to see you round the traps and on the forum again soon :)

Nick.


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PostPosted: Sun May 25, 2014 12:37 pm 
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Joined: Thu Sep 20, 2007 12:13 am
Posts: 228
Location: The Gap Brisvegas
Nick, how is the gearbox going?

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PostPosted: Sun May 25, 2014 12:59 pm 
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Joined: Thu Apr 23, 2009 9:39 am
Posts: 36
The gearbox is doing the job Jason, though it still has that snick into 3rd gear it seems to still go into gear under power. I'm not pushing it - I should get back up the drags in the next few weeks, either mid June after the Winternats or mid July after the Qld championship round, I'll let you know - I need some new rear tyres though, you couldn't point me in the direction of some cheap 225/50-15 street tyres?


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PostPosted: Tue Sep 16, 2014 1:59 pm 
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Joined: Thu Apr 23, 2009 9:39 am
Posts: 36
I guess I should update this - I began tuning with E85 this year and found a nice enough increase in torque to warrant another trip to the dragstrip which I did a few months ago.

My budget is still wafer thin but I wanted to give it its best chance of performing at the track after years of niggling issues. The cheap 225mm clutch couldn't hold the torque with 98 octane and with the E85 was a joke so I installed a Z24 240mm flywheel and an Exedy early R32 GTR Sports Organic clutch so I could be done once and for all with clutch slippage whilst still retaining easy street driveability. I also squeezed the cheapest largest tyres that would fit (225/50/15) on the rear to replace the 195's.

Well the tyres did provide more grip but still helped little as my 60 foot times were 0.5 second (!) slower than when I previously ran 12.6 (2.48 vs 1.91). Traction was on/off and the heavier clutch is more difficult to modulate so it really needs slicks to see any improvement in ET. MPH showed the power though, best pass was 13.19@119.94MPH, 20psi average boost. My guess is with slicks it would go 11.6@114. The calculators say it's making over 300hp. The gearbox did not like it and randomly kept me out of various gears. I had 3 goes at getting into 3rd on one pass and still ran 13.18@119.27!

Anyway I'm happy I proved the power I thought it should be making and it continues to be a reliable streetable car - also manages 24MPG on E85 with the lumpyish cam and non-projected nose plugs at 20thou gap which I think is pretty good mileage considering its only ever been street-tuned! I can still see the potential in a 'proper' cylinder head with bigger valves to help the breathing over 5000rpm, I was still only revving it to 6200. A 400hp streetable L20b on E85 is quite possible for anyone willing to try it.

Cheers!


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18th_June_Test_N_Tune_2014_-_721-(ZF-4417-15301-1-001).jpg [ 500.67 KiB | Viewed 3554 times ]
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PostPosted: Wed Sep 17, 2014 5:03 pm 
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Joined: Wed Jul 27, 2005 4:45 pm
Posts: 1035
Location: Zombie-free unfluoridated town in QLD
Legend!

Love this build more than almost anything here due to the fact its a budget datto build

If you havent tried a later SR or 71C box yet, you might need a cut and shut Rb25 box to make full use of the power and cant remember if you had an LSD but
I would also look into cut and shutting a toyota w58 box they have silky smooth synchros that you can bang in.


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PostPosted: Wed Sep 17, 2014 5:21 pm 
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Joined: Thu Apr 23, 2009 9:39 am
Posts: 36
Thankyou d! Yes a more modern gearbox would certainly be a great help - unfortunately (like all those slipping clutches) they work FINE on the street! Once this box is completely shagged I will upgrade, I hope the rest of the car hasn't rusted away by then. However I won't be pursing any more power and as it stands I wouldn't bother going back to the track without slicks so I think "120" mph is a good place to stop for a L series street car. Cheers :)


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PostPosted: Wed Sep 17, 2014 5:55 pm 
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Joined: Mon Apr 12, 2004 10:44 pm
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Location: On a XR650r, VIC
Decent mph!
my daily does 12.9 @110 with 2.0 60ft, so theres a heap left in the stanz with some traction.
Maybe you need to borrow a engine off youre bro? :twisted:

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PostPosted: Thu Sep 18, 2014 1:12 pm 
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Joined: Thu Apr 23, 2009 9:39 am
Posts: 36
Thanks Dan :) I would love to have a 3/4 chassis Stanza with a Liberty 5 speed that could handle that power! But if I was to go to a methanol engine I would still use the L20b and believe that in a maximum effort drag application 700hp is achievable, which would get a drag-weight Stanza into the 8's!


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PostPosted: Thu Sep 18, 2014 1:14 pm 
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Joined: Thu Apr 23, 2009 9:39 am
Posts: 36
There is already an Isuzu engined Gemini doing that, have yet to see someone really have a go at a BIG hp drag L4.


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PostPosted: Mon Jun 22, 2015 1:36 pm 
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Joined: Thu Apr 23, 2009 9:39 am
Posts: 36
Update:

I tried some Redline Shockproof in the gearbox which definitely helped the synchros, and made a quick decision to head to the drags again last saturday (1 year and 2 days since last time!). With the exhaust still up and 22psi (the most I have actually tuned for as the ECU runs out of zones at 20) ran 12.7@117.7 on a 2.0 60' and a big pedal in 2nd as it actually stepped out towards the wall. I unbolted the exhaust at the dump flange and let it make 25psi, ran 12.11@122 and then 12.10@123, on 225 Falkens, 2.0 60', revving to 6500. Had to slip the clutch on the launch to get that 60'. The old L didn't seem to mind that boost (loves E85), its running great, I still think the tuneup is pretty safe, but street tuning is getting difficult at that boost level. I guess 11's on true street tyres might be achievable?


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PostPosted: Sun Jul 26, 2015 8:35 am 
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Joined: Thu Apr 23, 2009 9:39 am
Posts: 36
Video of the 12.10@123. The tyres are 225/50-15 Falken ZE912 at 20psi.

https://www.youtube.com/watch?v=VUOp4BumXyw


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PostPosted: Sat Aug 15, 2015 10:48 pm 
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Posts: 895
Location: Adelaide 5162
Love seeing L series turbo's.

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PostPosted: Mon Aug 17, 2015 3:52 pm 
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Joined: Sat Oct 30, 2004 2:28 pm
Posts: 5357
Location: Melbourne, Australia
Bloody awesome.
Slicks!!! Do it!

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PostPosted: Mon Aug 17, 2015 8:29 pm 
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Location: Zombie-free unfluoridated town in QLD
smooth monster love it

heres another L 2.3 that you might have seen not as powerful
https://www.youtube.com/watch?v=d8M6g6TVQig


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PostPosted: Tue Aug 18, 2015 7:47 am 
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Joined: Thu Apr 23, 2009 9:39 am
Posts: 36
Cheers guys.

Its been a tough year, we lost mum to cancer. She was never into cars but she always supported her sons efforts with whatever we were doing, I know she listened many times to my frustrations about stuff I was doing with cars over the years.

Life is short, so you gotta just go after your vision. Mum left me some money, so for the first time ever I can actually think about doing something 'nice' for the car and not have to scratch for the money or justify it, so my current plan is to finally do up a nice cylinder head and try a set of slicks and see how far into the 11's it can go. That's the plan anyway, and we know what can happen with plans :)

Mum might not be around anymore but she left me the means to follow my vision. She did so much for us and we will all miss her greatly.

So give your mum a hug! :)


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