my TIGRA AERO PROJECT
 

ok boys.

I go to to describe the work on my car.

First, the car is an Opel tigra, year 1996
It is a little coupè, wit only 1604mm of length.

this is a profile of original car

http://img257.imageshack.us/img257/6914/tigralj4.jpg

and this below, it is the final solution (without the wheels), but my girlfriends does not want :(

http://img177.imageshack.us/img177/5007/provaxk6.jpg


My mods include:

1) ugly rear underbody extractor
2) fuel tank area covered with polycarbonate ( the exahust line is not covered)
3) front and rear wheel air deflector: the front deflector, deviate the airflow over the horizontal arm
4) grill block: this use three guideline bearing with manual positioning.
5) I do not know what name to give him, I call it: wheel flow stabilizer (WFS).
I is necessary to study it for a good performance.

A lot problem, it come from the rear suspension axle becouse it is exposed to airflow; I have an idea for problem resolution, but any advice is appreciated ;)
Other problem come from the engine undercover not present.

below some pictures:

first three pictures refers at original car (rear car)

http://img214.imageshack.us/img214/8808/pontent7.jpg

http://img214.imageshack.us/img214/9016/sxyr5.jpg

http://img214.imageshack.us/img214/3817/dxek8.jpg

now, the pannellings of previus pictures
I have pan all fuel tank area

http://img242.imageshack.us/img242/5074/f1as3.jpg

http://img165.imageshack.us/img165/4736/f2rv0.jpg

http://img165.imageshack.us/img165/2090/f3yf4.jpg

in this pic, you can look the marked areas covered

http://img161.imageshack.us/img161/9526/tigrafpsp0.jpg

Down, the ugly rear extractor

http://img112.imageshack.us/img112/57/scivolods0.jpg

http://img112.imageshack.us/img112/336/retrohb2.jpg

the points of anchor :

http://img112.imageshack.us/img112/1...oraggioef8.jpg

from the front:

original

http://img66.imageshack.us/img66/2451/fobx4.jpg

http://img66.imageshack.us/img66/806/fo2cv3.jpg

http://img59.imageshack.us/img59/7894/f2gj3.jpg

http://img59.imageshack.us/img59/3038/fronthm0.jpg

http://img59.imageshack.us/img59/1529/profilolo7.jpg

the plastic elements come from this:

http://img490.imageshack.us/img490/3...viatorisa0.jpg

http://img116.imageshack.us/img116/5404/totalpp4.jpg

in detail:

http://img116.imageshack.us/img116/478/f2tx5.jpg

the FWS

note: final pictures are not available.

http://img220.imageshack.us/img220/5686/p1010609ga6.jpg

http://img228.imageshack.us/img228/4527/p1010608dc0.jpg

In red , the final profile

http://img443.imageshack.us/img443/7979/profilozc3.jpg

the idea came from looking the underbody airflow of mercedess SLR
Note the air flow in to the rear wheel, wich cause turbolence (in the slr the flow it is used for brake ventilation)

http://img230.imageshack.us/img230/9...rtotammar6.jpg

My friend has an engine undercover Audi, but I discovered it :(

http://img407.imageshack.us/img407/5...2007001ql9.jpg

when this cover is applied to the original bumper, the result like below:

http://img150.imageshack.us/img150/5...2007012jk3.jpg

http://img150.imageshack.us/img150/5...2007012jk3.jpg


http://img358.imageshack.us/img358/7537/27926050mq9.jpg

more informations at http://tigrafans.forumcommunity.net/?t=7378938&st=0

Looks like you are off to a great start.
Looking forward to your results.

How are you keeping track of your fuel mileage ? Do you have a Scanguage ?

this is the biggest problem: i do not have any fuel meters.
Thi is for me an atypical case: I am generally precise and meticulous, and for engine mods Always I use the tools needed , but in this case...:(

the grill block :

I have used, PVC element for the block, and three sliding guide anchored to the front frame.

http://img210.imageshack.us/img210/813/p1010660fb6.jpg

http://img151.imageshack.us/img151/1521/p1010662bt5.jpg

http://img249.imageshack.us/img249/3408/p1010661oh5.jpg

http://img232.imageshack.us/img232/3726/p1010670su4.jpg

http://img405.imageshack.us/img405/4214/p1010664yf1.jpg

in the future I will use an electric motor for management grill block opening, or I replacement him with other mechanisme.

an other mod is the replacement of the original windscreen wiper

http://uploads.forumcommunity.it/pos...1176658289.jpg

http://www.bosch.it/formula/archivio...ages/spaz2.jpg

Wow, this is a great thread! Keep up the good work...that's a really nice looking car, too!

What is the original Cd of the car?

nice car, looks like some good mods

Coefficient of drag: 0.31
Frontal area: 19.16 sq.ft.

I have a little simulation: max speed Vs Cx (Cd)

[IMG]http://img291.imageshack.us/img291/2593/velvscxfn7.jpg[/IMG]

Two engine: in red the the 1.6liters with 100Hp , and blue, it is the 1,4 liters and 86Hp, both engine, with 16 valves.

Very interesting car!

I like the sliding grille block & undertray. Nice work.