chevelle ss 454 '70 tune?

[THEJAYY]

Hook it up

 

[VooDoo-Reverend]

What a polite young man. Your request will be filed and returned in 3 - 2,465 business days.

 

[Rotary Junkie]

What a polite young man. Your request will be filed and returned in 3 - 2,465 business days.

Pretty much.

I've got one... But I've also got no idea when I'll get around to building it. 400hp class online racers are eating all of my wallet all of the time.

 

[VooDoo-Reverend]

Pretty much.

I've got one... But I've also got no idea when I'll get around to building it. 400hp class online racers are eating all of my wallet all of the time.

Same. No matter what you do it will always handle like a hot turd so I never bothered with it. Don't have the time or interest to play with it.

 

[C5LuvR]

An intro and a "please" would be nice. However, since you are a fellow Michigander, I'll "hook it up".

Chevrolet Chevelle SS454 ’70 Tune

Below is my tune for my ’70 Chevelle SS454. I took the approach of bolt-on modifications only to see how car I could take the car (no weight reduction or permanent race modifications), esp. since I am new to tuning. I am very pleased with this tune: the car is very easy to drive and dominates all classic or muscle car races in the Beginner and Amateur Series. I can consistently run a 1:39 on Trial Mountain with the car (not bad for a big, heavy musclecar).

I would appreciate feedback on this setup, as I am just learning how to tune the chassis.

502hp, 529lb-ft 1762kg
Body/Chassis Mods: None
Engine: ECU Tuning
Intake System: Racing Air Filter
Exhaust: Catalytic Converter Sports
Turbo Kits: None
Transmission: None (standard 4-speed)
Drivetrain: Differential Adjustable LSD (10/40/20)
Suspension: Fully Customizable Kit
Ride Height -10 / -10
Spring Rate 6.1 / 5.3 (140% of stock springs)
Dampers (Extension) 5 / 5
Dampers (Compression) 5 / 5
Anti-Roll Bars 4 / 5
Camber 0 / 0
Toe Angle -0.10 / +0.20
Brakes: 5 / 5
Tires: Racing Medium

I am sure the car would handle better with weight reductions, but right now it does what I want it to (beat classic exotics on the Classic Supercar Challenge). Any feedback is appreciated.

 

[BluEvo210]

Hi! New member, here.
Indeed, I have feedback on the Chevelle tune...

After searching periodically for a few years, i found the real-world OEM spring rates for a 1970 Chevelle SS.
It was on a forum specific to the Chevelle, and the poster was referring to the optional F41 suspension.

Front: 435 lbs/in = 7.9 kg/mm
Rear: 160 lbs/in = 2.9kg/mm

I also found the OEM spring rates for the 1970 Buick GS and GSX (also GM A-bodies).

Front: 488 lbs/in = 8.9 kg/mm
Rear: 166 lbs/in = 3.0 kg/mm

In GT4, I used the Buick spring rates, set swaybars at 6/6, used 2.0 degrees of negative camber at the front, and the Chevelle was my nicest-handling musclecar.

I tried these spring rates in GT5, and it's a twitchy mess with awful drop-throttle oversteer. I could trust GT5's realism more if real-world spring rates got me better results.

I've been looking for aftermarket A-body suspensions to copy, but so far all I've got are front spring rates from Global West: 512 lbs/in = 9.2 kg/mm

I think I'll need something much stiffer to get my Chevelle under control, so the next time I play (after deployment is over) I'll try the 12.5 front spring rate and rear springs almost that stiff.

I've been running all my American musclecars with rear camber = 0 & rear toe =0, since the straight-axle suspension means alignment isn't adjustable.

 

[BluEvo210]

Hi! New member, here.
I tried to post this several minutes ago, but there was a glitch. The previous post was over a month ago, so I'm sure no one cares.

Edit: I now see that the previous post went through.

 

[BluEvo210]

I arrived at a satisfactory tune after a while, that worked OK without traction control, ABS, etc., and using sport:soft tires.

It needed a stiff front suspension to control weight transfer when braking or getting off the gas. It also needed the braking force turned way down, or (without ABS) it would lock-up the tires and go off course with the nose pointed some random direction.

Drivetrain: Differential Adjustable LSD (7/30/15)
Suspension: Fully Customizable Kit
Ride Height 0 / 0
Spring Rate 12.5 / 7.2
Dampers (Extension) 6 / 6
Dampers (Compression) 5 / 6
Anti-Roll Bars 6 / 6
Camber -1.5 / 0
Toe Angle 0 / 0
Brakes: 2 / 2

Since these settings work well enough to win a race in the Classic Musclecar Championship on sport tires, without driver aids, I assume it would kick ass with race tires.

 

[bigbear]

Front: 488 lbs/in = 8.9 kg/mm
Rear: 166 lbs/in = 3.0 kg/mm

In GT4, I used the Buick spring rates, set swaybars at 6/6, used 2.0 degrees of negative camber at the front, and the Chevelle was my nicest-handling musclecar.

I tried these spring rates in GT5, and it's a twitchy mess with awful drop-throttle oversteer. I could trust GT5's realism more if real-world spring rates got me better results.

I could be wrong but I think your anti-roll bars are too strong for those springs. I would try something like 4/2, 5/3. Your dampers could probably be softer at the back as well. Just a suggestion. Muscle car suspensions were set up for the street, or drag strip, so those springs aren't going to be ideal for road racing no mater how you tune everything else. The Chev springs work decently though, with a softer rear roll bar and dampers.

The weight and weight distribution may be off a bit in-game which would throw off the cars handling.