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Old 12-17-2012, 09:27 AM   #11 (permalink)
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I did that by myself. Just open the 13mm screw at the axis, move the wiper down and then tighten again.

The car got lowered already. Next to come is a closed front grille.


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Old 01-09-2013, 02:57 PM   #12 (permalink)
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Warm Air Intake installed, upper front grille closed, rear roof wing installed:















The mods i have made so far:

1. Motor oil 5W 40 Shell Helix 7 (less friction losses)
2. Gearbox oil Castrol Syntrans Transaxle 75W90 (less friction losses)
3. Wipers with aero blades fitted under the shape of the bonnet (better aerodynamics)
4. Bigger wheel for alternator. Diameter=75mm instead of 50mm (less drag)
5. Lowering ride height by 40mm front/back (better aerodynamics and performance)
6. VR6/GTI front lip (better aerodynamics)
7. Skinniest tires by OEM inflated to max sidewall 175/65 R14, low rolling resistance (better aerodynamics, lower rolling resistance, 2% longer gear ratio)
8. Smooth wheel covers (better aerodynamics) but i'm looking for completely closed ones
9. Rear wing (better aerodynamics)
10. Full closed upper front grille (better aerodynamics, retaining heat in engine compartment)
11. Warm air intake (better combustion, less pumping losses)
12. Added Liqui Moly CERATEC to engine oil (less inner friction)

Next to come: Antenna deletion, cruise control, partial blocked low front grille, tire spats.

Last edited by Glinzo; 01-09-2013 at 05:01 PM..
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Old 01-09-2013, 03:56 PM   #13 (permalink)
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Warm air intake can make a significant difference in mileage, especially in cold weather.
Welcome to the forum.

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Mech
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Old 01-09-2013, 04:07 PM   #14 (permalink)
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Not so sure the cruise control will help unless you are on almost perfectly flat road surfaces. I find when driving in hills I can anticipate the grade changes and use them to improve my mileage. Gradually loosing some speed uphill then letting the downhill portion increase your speed (even coasting if practical and legal) uses less fuel than standard cruise control programming.

Everything else looks great, especially the ducting for the warm air intake, which looks like a factory installation.

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Old 01-09-2013, 05:51 PM   #15 (permalink)
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Thanks a lot.

Yes i know that a factory cruise control reacts in the opposite way it should do for hypermiling. We haven't much flat roads here in South Germany so it wouldn't work perfect for me. But i simply don't want to miss the comfort that comes with a cruise control.

From 03/01/13 on i have to drive over 800mls a week for half a year. My right foot already hurts
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Old 01-10-2013, 04:32 PM   #16 (permalink)
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New Record: 41,9 MPG (5,62 ltr/100km) on LPG. This is equivalent to 4,5 liters of petrol (LPG has got 20-25% less energy) which means 52,3 MPG on petrol.

243 miles on Autobahn, 200 - 800m elevation, no hypermiling techniques because of difficult weather conditions. Used drag of lorrys for approx. 180 miles.

It was raining all the time and i had crosswinds. Lights were on. Heating fan level 1

I'm pretty satisfied with that.
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Old 01-25-2013, 07:54 AM   #17 (permalink)
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Roof antenna is now removed. The hole in the roof got closed with (green) duct tape. I've installed a Blaupunkt windscreen antenna instead. Excellent reception - better than before.
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Old 12-07-2015, 03:39 AM   #18 (permalink)
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Almost 3 years later i'm back with a 1999 OPEL Corsa 1.0 12V with 54 HP.

First i gave it a full service. New brakes, new airflow meter, O2 Sensor, air filter, sparkplugs, oil (0W40) with filter, carburant filter, added ceramic additive in gearbox and motor, cleaned EGR valve, installed rpm meter etc...

Currently it's running on 145/80 R13 tires inflated to max sidewall. Last week i swapped the gearbox as the ratio of the original one was too short. With the new gearbox i've lowered the range at 100 km/h from 3446 1/min to 2772 1/min. The 4th gear is now as long as the former 5th gear.

Original diff gearing was 3,94, 5th gear 0,892
Now it is diff 3,74, 5th gear 0,761
So the rpm level in 5th gear is 19,56% lower.

I've ordered a MPGuino, too.

This week i will install a full grille block. I will wrap the original upper and lower grille in car wrapping foil and get them re-installed.

I'm still doing the first fuel tank. It's got a 46 ltr (12,15 Gal) tank and i hope to do more than 1000 kms first. The "EPA rating" in ltr/100km is
Urban: 7,6 (30,95 US MPG)
Highway: 4,8 (49,00 US MPG)
Mixed: 5,8 (40,55 US MPG)
To do at least 1000 kms I’ll have to reach 51,13 US MPG or 4,6 ltr/100km.

Last edited by Glinzo; 12-07-2015 at 06:41 AM..
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Old 12-07-2015, 08:25 AM   #19 (permalink)
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I would love to have more minimalist options like the Corsa B in the States, but evidently the manufacturers are convinced we "don't want them." Well, some of us do.

I see the Corsa's rear end and how it rounds over gently at the rear corners. Wiser people than I have pointed out that cleaner flow separation is better for aero, and that rear corner would be better if it were sharper.

Orange4boy's Previa suffered a similar design flaw and he improved on it with added-on trailing edges to continue the vehicle's rearward taper while providing sharp cutoffs. If I recall correctly when he did it the first time he used stainless steel, which made my jaw drop.

Anyway, when you only have 54hp to play with, giving them less to do is a good thing, and as mods go it's small enough to maybe slip under draconian European regulations.
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Old 12-07-2015, 08:55 AM   #20 (permalink)
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Just look, what they gave to the "ECO" model:



Sadly i can't install this rear wing because i own a 5dr. The 3dr is much more rounded at the rear

For my 5dr there's a small wing:

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