Need More Traction
01-22-2013, 11:26 PM
#19
Chronic Tool Dropper
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Choose your battles. Specify a 100 MPH punch in third. That usually returns the noisiest ones back down into the noise. Around here there are a lot of AMG sedans that are perfectly comfortable with the 100 MPH punch. Fortunately they tend not to street-race from stoplights. As do I.
01-23-2013, 01:28 AM
#20
Nordschleife Master
Next time its in the air, tranny in neutral, brake off, turn one wheel and see what the other one does.
The 928 doesn't have torque bias, so tires and road condition permitting it will spin both wheels without an LSD.
Cheapest first move, stop street racing. Second cheapest, put one better tire on the side that spins (repeat).
Spinning one wheel in front of kids is NOT representing.
The 928 doesn't have torque bias, so tires and road condition permitting it will spin both wheels without an LSD.
Cheapest first move, stop street racing. Second cheapest, put one better tire on the side that spins (repeat).
Spinning one wheel in front of kids is NOT representing.
01-23-2013, 08:46 AM
#21
Three Wheelin'
Lol, one wheel peel. That reminds me of the car meme picture of a tearful girl with the caption "abandoned airfield near my house is open" then at the bottom "so is my diff".
01-23-2013, 10:35 AM
#22
Nordschleife Master
These cars, with the torque tube to rear-mounted transaxle, are not prone to one-wheel spins like classic RWD American muscle. In a flat launch neither wheel has more power applied or weight and the engine torque does not lift a wheel or twist the body.
You need to check the tires and tire pressures. Get good Summer-only tires and run them a bit softer, like 32psi. It'll grip well.
You need to check the tires and tire pressures. Get good Summer-only tires and run them a bit softer, like 32psi. It'll grip well.
01-23-2013, 02:19 PM
#23
Intermediate
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Thanks for the replies
Ya i just couldn't resist the temptation it was a long stretch on a back hyw road... Needless to say by the time i grabbed second gear and regained traction he was falling quickly behind by a car length!!!!
I dont mind the work of changing out the stock pumpkin to get LS if i will at least gain something.
I do have plans in the future for wider tiers and rims it just not in the current budget.
Ya i just couldn't resist the temptation it was a long stretch on a back hyw road... Needless to say by the time i grabbed second gear and regained traction he was falling quickly behind by a car length!!!!
I dont mind the work of changing out the stock pumpkin to get LS if i will at least gain something.
I do have plans in the future for wider tiers and rims it just not in the current budget.
01-23-2013, 04:02 PM
#24
Race Car
My wife's 350hp 3,500lbs C32 AMG 5-speed auto does 0-60 in 4.7s when it holds traction (some claim to be able to do 4.5s), and my 928 walks away from it.
Dan
'91 928GT S/C
475hp/460lb.ft
01-23-2013, 05:05 PM
#25
Drifting
01-23-2013, 06:32 PM
#27
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Ke6oqc,
Limited slip diffs will put power to the ground far better than an open diff. Wider, sticker tires will also improve traction. But be careful you can easily trade one problem for another. My 1980 Euro S has a limited slip diff and I run Kumho 295/35 17 XS tires in the rear, when I accelerate hard either from a standing stop or hard out of a corner I get significant wheel hop if I hammer it hard, which is common for the manual transmission cars. So with everything I have done I still can not put all the power I have down to the ground. Remember spinning the tires is slow, but wheel hop can break things. My car is not a supercharged HP beast, the 4.7 euro motor dynoed 283 hp at the rear wheels thanks to a very open exhaust.
Paul 1980 Euro S Red/Blk Lea
Limited slip diffs will put power to the ground far better than an open diff. Wider, sticker tires will also improve traction. But be careful you can easily trade one problem for another. My 1980 Euro S has a limited slip diff and I run Kumho 295/35 17 XS tires in the rear, when I accelerate hard either from a standing stop or hard out of a corner I get significant wheel hop if I hammer it hard, which is common for the manual transmission cars. So with everything I have done I still can not put all the power I have down to the ground. Remember spinning the tires is slow, but wheel hop can break things. My car is not a supercharged HP beast, the 4.7 euro motor dynoed 283 hp at the rear wheels thanks to a very open exhaust.
Paul 1980 Euro S Red/Blk Lea
01-24-2013, 07:57 AM
#28
Three Wheelin'
Ke6oqc,
Limited slip diffs will put power to the ground far better than an open diff. Wider, sticker tires will also improve traction. But be careful you can easily trade one problem for another. My 1980 Euro S has a limited slip diff and I run Kumho 295/35 17 XS tires in the rear, when I accelerate hard either from a standing stop or hard out of a corner I get significant wheel hop if I hammer it hard, which is common for the manual transmission cars. So with everything I have done I still can not put all the power I have down to the ground. Remember spinning the tires is slow, but wheel hop can break things. My car is not a supercharged HP beast, the 4.7 euro motor dynoed 283 hp at the rear wheels thanks to a very open exhaust.
Paul 1980 Euro S Red/Blk Lea
Limited slip diffs will put power to the ground far better than an open diff. Wider, sticker tires will also improve traction. But be careful you can easily trade one problem for another. My 1980 Euro S has a limited slip diff and I run Kumho 295/35 17 XS tires in the rear, when I accelerate hard either from a standing stop or hard out of a corner I get significant wheel hop if I hammer it hard, which is common for the manual transmission cars. So with everything I have done I still can not put all the power I have down to the ground. Remember spinning the tires is slow, but wheel hop can break things. My car is not a supercharged HP beast, the 4.7 euro motor dynoed 283 hp at the rear wheels thanks to a very open exhaust.
Paul 1980 Euro S Red/Blk Lea
01-24-2013, 10:14 AM
#29
Drifting
My car has wheel hop. Light wheel spin on wet asphalt and it will knock your teeth out. It's very common on IRS cars. Dry asphalt I don't have enough power to spin both 295s in a straight line. I never had hop spinning the 225s it had stock.
New cars deal with this by having one solid half-shaft and one much larger tube half-shaft. The tube half-shaft is about 2x more stiff. You still get wheel hop in the rear suspension, but the tires are out of phase. Since only one is hopping at a time it doesn't excite the entire rear suspension and feels much better.
New cars deal with this by having one solid half-shaft and one much larger tube half-shaft. The tube half-shaft is about 2x more stiff. You still get wheel hop in the rear suspension, but the tires are out of phase. Since only one is hopping at a time it doesn't excite the entire rear suspension and feels much better.
01-24-2013, 10:48 AM
#30
Race Car
My old '86 with LSD would wheel hop sometimes with 265/35-18 tires. The supercharged GT doesn't have even a slight hint of it, it is perfectly smooth wheel spin with both 275/35-18 and 285/30-18 tires.
Dan
'91 928GT S/C 475hp/460lb.ft
Dan
'91 928GT S/C
475hp/460lb.ft