Ground grip

[Joy15779]

Good day dear Mates.
I need a important suggestion.
My f83 is heavy tuned working perfectly stage 3/4 kratos turbo, eVenturi Intake, carillo pistons and arrow rods, Akrapovic DP, HCP Software, no opf, dorch pump, m5 injectors ... and other
Now problem is also in 3rd gear while pushing gas the car ... lift up...no fron grip. Any suggestion to solve? Spoiler? Springs? Thanks for suggestion.

[Viegasjuuice]

Originally Posted by Joy15779

Good day dear Mates.
I need a important suggestion.
My f83 is heavy tuned working perfectly stage 3/4 kratos turbo, eVenturi Intake, carillo pistons and arrow rods, Akrapovic DP, HCP Software, no opf, dorch pump, m5 injectors ... and other
Now problem is also in 3rd gear while pushing gas the car ... lift up...no fron grip. Any suggestion to solve? Spoiler? Springs? Thanks for suggestion.

How much power do you make?

[Joy15779]

Never dyno yet since stage 3 and engine but my hp bottom line is 720 and it reaches at 6000 rpm

[Viegasjuuice]

Originally Posted by Joy15779

Never dyno yet since stage 3 and engine but my hp bottom line is 720 and it reaches at 6000 rpm

That power level is making your front tires lift off the ground?

[Joy15779]

I suppose is torque. Lift means loose grip, don't fly

[Viegasjuuice]

Originally Posted by Joy15779

I suppose is torque. Lift means loose grip, don't fly

Thats crazy. I would think the f8x is plenty heavy to prevent that from happening at those power levels. Maybe you need to run smaller wheels and wider drag radials.

[Joy15779]

Smaller wheels should increase the torque on the wheel and would get even worse on my humble point of view but I might be wrong. Thanks in the meantime

[gerri]

As an F83 owner i don't understand why choose to so heavily tune an F83 that is about 450 pounds heavier than an F82...

[Joy15779]

That is the reason in fact. I m crazy for the performance. I m not going to challenge an f82, simply try to get the best from mine

[M 4 FUN]

As i understand it you loose front end grip when you lift the throttle?
What suspension and tire setup do you have?

[Joy15779]

Originally Posted by M 4 FUN

As i understand it you loose front end grip when you lift the throttle?
What suspension and tire setup do you have?

Exactly, drastically, dangerous. Suspension standard f83 set to sport +, the other are worse. Tires at the moment hankook 19 winter. Summer time toyo r888r

[Mavus]

Originally Posted by Joy15779

Good day dear Mates.
I need a important suggestion.
My f83 is heavy tuned working perfectly stage 3/4 kratos turbo, eVenturi Intake, carillo pistons and arrow rods, Akrapovic DP, HCP Software, no opf, dorch pump, m5 injectors ... and other
Now problem is also in 3rd gear while pushing gas the car ... lift up...no fron grip. Any suggestion to solve? Spoiler? Springs? Thanks for suggestion.

how can you lose grip when you lift and transfer weight towards center (cg) where the car is almost balanced?

What suspension, wheels and tires do you have?

Have you checked alignment?

Tire pressures?

Something doesn't add up …

[Humdizzle]

sounds like he's losing front end grip when flooring it. which makes sense. the f83 is very heavy. and with the top down there is more weight on the rear. then with big power you are throwing even more weight to the rear under acceleration. same problem that plagued older 911s with the front end going light

all i can say is just stick to straight lines. or send the car to a performance suspension shop to stiffen up the rear, add rake, and corner balance.

[Joy15779]

Originally Posted by Humdizzle

sounds like he's losing front end grip when flooring it. which makes sense. the f83 is very heavy. and with the top down there is more weight on the rear. then with big power you are throwing even more weight to the rear under acceleration. same problem that plagued older 911s with the front end going light

all i can say is just stick to straight lines. or send the car to a performance suspension shop to stiffen up the rear, add rake, and corner balance.

You got the point. I live in italy, temperature now is around 8, I only imagine summer time with toyo when I ll try the 2nd gear... With the next ecu I should touch 800hp, problem will be so much to become dangerous. I never suppose to face this with the standard suspension... but it definitely be real. Thanks to everybody

[G35POPPEDMYCHERRY]

tire pressure off by 1-2 psi in the front causing positive climb

[jmg]

Originally Posted by Joy15779

You got the point. I live in italy, temperature now is around 8, I only imagine summer time with toyo when I ll try the 2nd gear... With the next ecu I should touch 800hp, problem will be so much to become dangerous. I never suppose to face this with the standard suspension... but it definitely be real. Thanks to everybody

Do you find that the rear end wants to wiggle under acceleration, or that you simply have very little control of the front under acceleration?

If the rear is wiggling:

You can tame the rear with negative camber, slight toe in, and a little forward rake. A performance oriented alignment shop can help you dial that in. You should also look into stiffer suspension and the widest tires you can fit for the rear, with adequate sidewall for grip. I’d also look into something other than Toyo R888’s. They are fine tires, but kind of the “popular” tire that gets marketed well, but there are better options out there. They are the Bose speaker of tires.

Little control of the front:

That’s kind of natural. All your weight is going to the rear. Your front wheels can help you keep straight, but not really change direction much under acceleration. Maximize stability with the stuff I mentioned above. If you are going fast enough, front and rear aero might help.

[Joy15779]

Originally Posted by jmg

Do you find that the rear end wants to wiggle under acceleration, or that you simply have very little control of the front under acceleration?

If the rear is wiggling:

You can tame the rear with negative camber, slight toe in, and a little forward rake. A performance oriented alignment shop can help you dial that in. You should also look into stiffer suspension and the widest tires you can fit for the rear, with adequate sidewall for grip. I’d also look into something other than Toyo R888’s. They are fine tires, but kind of the “popular” tire that gets marketed well, but there are better options out there. They are the Bose speaker of tires.

Little control of the front:

That’s kind of natural. All your weight is going to the rear. Your front wheels can help you keep straight, but not really change direction much under acceleration. Maximize stability with the stuff I mentioned above. If you are going fast enough, front and rear aero might help.

Little control of the front.
Message rcvd with thanks