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Post by steve on Sept 6, 2006 20:20:54 GMT
I think you are doing a brill job ! - keep us posted Debs.
You have given your times for the standing quarter etc and I know it's not what concerns you on the strip but I would be interested in what you reckon your 0 - 60 time comes out at ?
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Post by Debs on Sept 7, 2006 1:55:18 GMT
Thanks Steve TBH I haven't a clue what the 0-60 time is. Looking at my timing slips from the Pod, last month I was hitting the 1/8 mile at around 10secs and 70mph (un-modded engine). Off gas 1/8 mile time (modded engine) was 10.2 secs with the headwind, again at 70mph. On gas was 9.4secs and 75mph with the headwind. The figures aren't really comparible with last month, unfortunately, since the conditions were so different, but I'd guess that would be around 6 secs 0-60mph, possibly slightly less (sub 6 secs) on a good day. Again traction is a problem at the moment since I can't use max RPM at the Launch. It would be interesting to borrow a GPS and do some timed runs. What is noticeable is that off the gas the top end power is much better than the stock engine and (strangely enough) the torque spread is slightly wider. Certainly the car is much punchier at speed and I'd guess the 'in gear' times for acceleration are better - it's certainly surprised the odd Porsche Boxter as well as a Subaru Impreza! On the gas, of course, it's a whole different story. Far more torque - the rev counter fairly whips around the dial now. Once the 50 jets are in I'm going to play with the Progressive Controller settings. I'll probably start off at a 30% with a ramp time of 3 seconds (to help with wheelspin off the line), but have the controller 'latch'. That is to say, rather than the controller resetting itself back to it's start point every time I come off full throttle for the gear change, it will 'remember' it's last power setting and start again from there when full throttle is re-applied.
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Post by erikb on Sept 7, 2006 11:05:08 GMT
Looking forward for your next report. Maybe I should consider a N2O installation myself, it looks like a great improvement if you want torque during flat out accelerations.
PS. Wasn't their a blue/purple modified F with gaz ?
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Post by Debs on Sept 7, 2006 22:13:15 GMT
If you are thinking of going down the NOS route you have to consider that an 11lb bottle (5kg) in the boot seriously limits boot space for normal use. You could fit a 5lb bottle for more space (or even fit it under the bonnet) though this obviously gives you less gas and less value for money on refills (plus a front mounted bottle gives problems with delivery pressure and may require a 'Purge Kit').
It's also essential you get your engine 'leak down' tested prior to fitting NOS.
Personally I would never[/i] recommend using any NOS kit other than that supplied by 'Wizards of Nos' (WON). Yes the Yank based kits are way cheaper, but TBH they have a history of failure, unreliability and generally less power gain for a given shot of NOS. Basically they are 25 years out of date and IMO total cac.
The last[/i] thing you want on any NOS installation (but especially on a small engine like the K Series) is a Fuel Solenoid failure as you hit the gas = BOOM![/i].
WON components are built to extremely high tolerance by a guy as has been developing NOS installations for 25 years (Trevor Langfield). They are also lifetime guaranteed.
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Post by erikb on Sept 8, 2006 13:09:25 GMT
Could you tell me more about the 'leak down' test ?
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Post by Debs on Sept 8, 2006 14:58:47 GMT
A leak down test is similar in some respects to a compression test in determining an engine's condiditon. However, the problem with a compression test is that there are too many variables present.
Compression testing can only be used to check engine condition by comparing the cylinders to each other, or to a past norm (ie like with like). Variables such as cam profile and engine cranking speed, will affect the readings.
By carrying out a leak down test, you can confirm that the engine's internals (particularly the piston rings / bores, valve seats, head gasket, etc) are undamaged and in good working order. Basically pressurised air is fed into each cylinder (at TDC on the compression stroke) via the spark plug hole and the rate at which the pressure decays (leak down) is measured. If a problem is detected then it is relatively easy to pin it down: eg pressurisation of water system indicates HGF, change in leakage rate when crank 'jiggled' indicates piston ring land wear or bore wear, constant leak rate when crank jiggled indicates valve seat wear, etc.
The point about a leak down test is that it not only checks for loss of compression, but also helps to diagnose why[/i] there is a loss in compression. Furthermore it is far more sensitive than a compression test and checks each cylinder independantly against a finite baseline.
For NOS installations, higher than 6% leakage from any cylinder is unacceptable and indicates that there is some serious internal wear or damage. The cause of the problem must be found and rectified before fitting a nitrous system, otherwise at best you will fail to get the maximum benefit from the nitrous, at worst you could get serious component failure.
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Post by steve on Sept 8, 2006 17:52:04 GMT
TBH Debs I had heard of leak down tests but also didn't know what was involved, thanks for the info.
Are you in automotive engineering in some way ? - cos if your not, you should be !
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Post by Debs on Sept 9, 2006 13:07:08 GMT
Automotive engineering? No lol. I've just been building and racing cars for the last 25 years or so
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Post by erikb on Sept 13, 2006 9:37:16 GMT
A leak down test is similar in some respects to a compression test in determining an engine's condiditon. ..... Great, thanks Debs. I didn't know this was called a leak down test. Great thing you refreshed my mind, put a name on it and told me about the 6%. I've got a starting point now: the leak down test.
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Post by Debs on Sept 13, 2006 9:49:55 GMT
Erik, if you are thinking about going down the nitrous route I would recommend you get a copy of "The Nitrous Oxide High Performance Manual" by Trevor Langfield published by "Veloce Publishing" as part of the "SpeedPro Series" of books. It can be obtained from "Wizards of Nos" www.noswizard.com/product_info.php?cPath=1&products_id=59There's also a really good forum on that URL discussing the 'ins and outs' of Nitrous.
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Post by samph on Sept 13, 2006 17:23:14 GMT
Hi Debs ~ sounds like you had some pretty good fun with the Nos ~ you'll have to start a 'scalps' trophy sticker line down the F ~ first the Toyota, now the Elise ;D Add to that a 'catch me if you can' decal across your rear {ahem, Fs rear that is LOL} Have a fab time over the weekend ~ look forward to reading your next update
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Post by Debs on Sept 13, 2006 21:15:26 GMT
Hmm you mean like a WW2 fighter plane?
Aye skulls 'n crossbones with the car type beneath all along the sills ;D
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Post by johnstark on Sept 15, 2006 19:54:12 GMT
Hi Debs Could you comfirm the next date your @ the Pod. As some of us mere mortals, want to see ya car at play. Cheers John
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Post by Jonathan Tully on Sept 15, 2006 21:04:39 GMT
Yup I too would be up for this one ;D
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Post by seantf on Sept 15, 2006 21:22:53 GMT
we are up for this to
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