Help needed
#1
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Join Date: May 2005
Location: South Africa
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Help needed
Hi,
My question is what is the best setup for 1/4 mile and for 1km. The reason I ask in that South Africa runs a few distances when it comes to drag racing. We run the normal 400m (1/4mile), the 800m as well as the 1km Top speed runs.
The problem comes in with diff rations etc, fine understandable, but what about x-hasuts. It seems like the shorter the run the shorter the exhuast should be ie out the side or a custom short exhuast, while the 1km needs a longer say 76mm-89mm (aprox 3.5" to around 4"), and run to the rear of the car.
Please assist because I would really like to get this problem sorted out!!!!
One other thing,
I drive a 1981 Mazda 323 with a series 5 motor dropped in. The car has a few mods, nothing super. The car has a street port, soon to be dowled, Excel waste gate, custom intercooler, dumpvalve, custom charge piping, Microtech LTX8, a Ar70 with a 60-1, 1 mil, not to sure of the exact size of the compressor side "hot side". The car runs at around 17 PSi and runs a 1/4 mile of around 12.2. What other mods do you guys suggest!!! Please help!
Thanks
My question is what is the best setup for 1/4 mile and for 1km. The reason I ask in that South Africa runs a few distances when it comes to drag racing. We run the normal 400m (1/4mile), the 800m as well as the 1km Top speed runs.
The problem comes in with diff rations etc, fine understandable, but what about x-hasuts. It seems like the shorter the run the shorter the exhuast should be ie out the side or a custom short exhuast, while the 1km needs a longer say 76mm-89mm (aprox 3.5" to around 4"), and run to the rear of the car.
Please assist because I would really like to get this problem sorted out!!!!
One other thing,
I drive a 1981 Mazda 323 with a series 5 motor dropped in. The car has a few mods, nothing super. The car has a street port, soon to be dowled, Excel waste gate, custom intercooler, dumpvalve, custom charge piping, Microtech LTX8, a Ar70 with a 60-1, 1 mil, not to sure of the exact size of the compressor side "hot side". The car runs at around 17 PSi and runs a 1/4 mile of around 12.2. What other mods do you guys suggest!!! Please help!
Thanks
#4
Passing life by
The best depends on what you want to do or you have most fun. A properly tuned straight line car will be geard to compleatly top out the cars speed and rdline final gear right as you pass the line. Thus if you build a 1/4 car you will be unable to run 1/2 or 1 mile runs. This in minde what do you want to do?
#5
Engine, Not Motor
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Join Date: Feb 2001
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Your exhaust has very little to do with it. With turbo cars, it is much more important to create a large pressure diff between the turbine and atmosphere, and thus you want to go with a larger pipe size.
The key are the gear ratios. If you have the money, go with a tranny (ie. Lynco) for which you can get every gear imaginable, and a classic quick change rear end...
The key are the gear ratios. If you have the money, go with a tranny (ie. Lynco) for which you can get every gear imaginable, and a classic quick change rear end...
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David Hayes
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