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Engine Specific Info and Questions => IDI Engine => Topic started by: ftm1776 on July 07, 2014, 11:45:04 am
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Does a front air dam help aerodynamics to any great degree???
I don't have an engine pan under my 1991 MK2 1.6 diesel, NA engine.
Only the stock, black "valence" on my car. Maybe that's good enough????
If you have any experience, some pictures would be nice.
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An air dam absolutely helps aerodynamics. In just about every form of racing, any car or truck that can legally use an air dam does so.
(http://i382.photobucket.com/albums/oo263/boattailbill/frontsofToddLowsPHASE-4.jpg)
They are mainly intended to keep air from passing under the aerodynamically "dirty" chassis of the car. By keeping the air moving over or around the vehicle, aerodynamic drag is reduced.
How to quantify the improvement on your '91 Golf is a different matter, but an air dam will help.
Steve.
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Thanks, Steve.
Cool pictures !!!
I don't want to have great expectations, but if I can prototype something out of,say, card board or plastic, I'd like to give it a try.
I'm at 46 mpg(US) latest check and now thinking that I might improve that a bit just by keeping it at 50 mph on the open road....we'll see how that turns out. I'm shooting for 50 mpg which I have not reached with my car since new. I'm the original owner of this 1991 MK2 Jetta 1.6 NA diesel, 290,000 miles. I had some head work one time when the belt broke...I was lucky on that one !!!!
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You might want to check out ecomodder.com.
Those guys make a lot of aero devices from coroplast, which is the plastic cardboard like stuff typically used for political signs.
Give them a look..
Steve.
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^
Yup, ecomodder.com has lots of good info. I go there every now & then to see if there's anything new. The peeps, who get the best mileage have made a flat belly pan that runs the length of the vehicle. Just look to see how rough the underside of vehicles are, especially trucks & vans. You can imagine how a perfectly flat under surface would help reducing drag. I plan on doing it on my Caddy, along with some other aero stuff.
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Keep it under 55mph if high mpg is your main goal, its never intended to go much faster than that. My 1980 1.6n/a with 5speed ecogear does over 70 mpg in 50mph all day... 60-65mph dramasticly decrease mpg's...
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Keep it under 55mph if high mpg is your main goal, its never intended to go much faster than that. My 1980 1.6n/a with 5speed ecogear does over 70 mpg in 50mph all day... 60-65mph dramasticly decrease mpg's...
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That's grrat mpg. What gear are you in while doing 50 mph?
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5. Or "E" as the stick says... all speed over 30mph is 5. gear speed:-)
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What rpm are you at 30 mph in 5th gear? Isn't that in lugging territory? Is your engine stock? Modified?
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Keep it under 55mph if high mpg is your main goal, its never intended to go much faster than that. My 1980 1.6n/a with 5speed ecogear does over 70 mpg in 50mph all day... 60-65mph dramasticly decrease mpg's...
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Impressive mileage under any conditions.
Does Norway use "Imperial" gallons, or "US" gallons?
Steve.
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My 81 when it was young and a 4spd would do a solid 50mpg @50-55mph unloaded flat ground no headwind.
We lost 8-10MPG making it keep up with increasing interstate traffic speeds over the years. They really
aren't nearly as economical as they used to be.
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We lowered the caddy and iam looking for a new kamei spoiler ( mk1)
GB
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Stock ride height... Heck yea helps... Drop car 1.5" well mk1 and you get same effect... At least thru my experiances...
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Engine has TD pump, and 2" straight pipe exhaust, otherwise stock. High pressure filled tires. 30mph in 5th gear is just over the "lugging" not for acc, but maintaining speed its fine...
Does Norway use "Imperial" gallons, or "US" gallons?
Steve.
Neither, as any civilised country we use Liters, Meters, and Grams (Kilogram) i have absolutely no idea how much a gallon is, is 4quarts one gallon?
So my original testresult was:
3liter per 100km, going 80kph "passive driving".
4.1l/100km going 90-110 "active driving"
3.7l/100km on my daily driving, which consist of about everything, but trying to keep it under 80kph...
Just put these numbers in to a convertion app and out comes some wicked numbers:-)
It isn't a fast car, this little golf, my whole family in up a steep underwater tunnel (8%) i had to fetch 3rd gear to go 80kph...
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Gallons are easy when milk and coolant come in them. :)
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GEE-BEE I can hook you up with the spoiler I didn't want to put on the front of the Rabbit. From a complete kit that came from a GTI. I already had a flat one on so I wasn't interested in the low and pointed nose of the one I bought. It is under the shed keeping the spiders from sleeping. Bright yellow it was, not painted yet.
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kAMEI ?
Pics please when you get a chance
[email protected]
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I took a pass on the Kamei as I had a BBS I think already on and it looked a lot like it. The front spoiler I have is from a GTI, Zender kit. Very much pointy and low to the ground. With the high curbs and pot holes around here I wanted the more flexible BBS.
Will work on picture in the afternoon tomorrow if I can break out of work around 430 instead of closer to 6.
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Engine has TD pump, and 2" straight pipe exhaust, otherwise stock. High pressure filled tires. 30mph in 5th gear is just over the "lugging" not for acc, but maintaining speed its fine...
Does Norway use "Imperial" gallons, or "US" gallons?
Steve.
Neither, as any civilised country we use Liters, Meters, and Grams (Kilogram) i have absolutely no idea how much a gallon is, is 4quarts one gallon?
So my original testresult was:
3liter per 100km, going 80kph "passive driving".
4.1l/100km going 90-110 "active driving"
3.7l/100km on my daily driving, which consist of about everything, but trying to keep it under 80kph...
Just put these numbers in to a convertion app and out comes some wicked numbers:-)
It isn't a fast car, this little golf, my whole family in up a steep underwater tunnel (8%) i had to fetch 3rd gear to go 80kph...
3, 3.7, 4.1 l/100 km is 78, 63, 57 mpg in this uncivilized country lol. Those are amazing numbers! Do you have an intercooler? What transmission do you have? Is it mostly flat where you are?
Straight pipe meaning no muffler or resonator?
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3, 3.7, 4.1 l/100 km is 78, 63, 57 mpg in this uncivilized country lol. Those are amazing numbers! Do you have an intercooler? What transmission do you have? Is it mostly flat where you are?
Straight pipe meaning no muffler or resonator?
Its amazing yea, I'm still amazed my self...
I don't know gearbox code other than that its a "ecobox" from a mk2.
Its not turbocharged so no IC...
Straight pipe from a modified TD manifold and a "racemuffler" at the back, no hard bends an fewer bends than original setup.
PictureGoogle Norway;-) "flat" is not in our dictionary...
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What about the "full-load adjusting screw" just above the fuel shut-off solenoid?????
Can that be tweaked a little to increase mileage????
Is it turn in for more fuel(smoke/power) and out for less(economy)?????
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You have the right direction on the power versus economy thing for that screw. Just remember if you tweak it you need to bump or reduce the idle as well. Play with one you have to play with the other.
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Its been turned a bit out because the stock TD pump gave some blacksmoke, maybe turned a bit to far out, but with this milage i won't touch it!
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