Brand new genx spring rates?

[outofcontrol]

We have a new genx was curious on what springs to try because we will be running a 510 pound steel ford engine the overall weight of the car is 2500 pounds with a 220 pound driver, we ran the same engine last year in a 2011 genx felt like the car stayed on the nose ,no weight transfer or traction and help would be great

[keeks]

I think you would be best going with MB's recommendations, and try to get your car's scaled weights close to the numbers as well.

[outofcontrol]

Went with there recommend springs no movement in car stayed flat and rf bottomed out put 600 in lf and 500 in rf no movement still rf shock about 3/4 inch from bump travel wise any ideas? Car has 53.5 rear % have a 325 on lift bar should I increase it since car is so heavy?

[7uptruckracer]

Where is motor mounted. I THINK all the ford weight is in the block if memory serves me correctly

[outofcontrol]

It's in the bottom hole on mid plate to get it as high as possible

[7uptruckracer]

No bent shock shafts it doesn't take much. Something isn't adding up you should be able to run like a 350 ish RF as a base in most any cars. Post your whole setup. and definitely check for any binds

[outofcontrol]

Car had 53.9 left 53.5 rear shocks are fresh from accufforce ohlins 1st night on them lr chain set at 13 inche's had 500 on lf 350 on rf 200 lr 225 rr 325 lift bar spring car overall weight is 2495 with 20 gallon of fuel I got 75lbs mounted above rear end motor weight alone is 510 I'm wondering of its to heavy to lift it

[Matt49]

Car had 53.9 left 53.5 rear shocks are fresh from accufforce ohlins 1st night on them lr chain set at 13 inche's had 500 on lf 350 on rf 200 lr 225 rr 325 lift bar spring car overall weight is 2495 with 20 gallon of fuel I got 75lbs mounted above rear end motor weight alone is 510 I'm wondering of its to heavy to lift it

That motor could way 1000 pounds and you should still get movement in your race car.
How long is your j-bar and where is it mounted on each end?
You REALLY need to check everything for binds if you haven't yet. Take all of your springs off of the shocks and bolt the shocks back up to the car and make sure all 4 corners move up and down smoothly through full range of motion. Do this on the front end with steering at several different places in its range of motion. Make sure that your drive shaft isn't bottoming out in the transmission.

What do you have for shocks?

[outofcontrol]

Ohlins they all moved freely

[outofcontrol]

On j bar it's 8 3/4 on frame And all the way the way on the bottom on pinion plate side to side is 16 5/8 I gotta be missing somthin what's thoughst on a heavy lift bar spring? To help lift car like 350 375 maybe Even a 400?

[outofcontrol]

On j bar it's 8 3/4 on frame And all the way the way on the bottom on pinion plate side to side is 16 5/8 I gotta be missing somthin what's thoughst on a heavy lift bar spring? To help lift car like 350 375 maybe Even a 400?

[Matt49]

The lift bar isn't what hikes the car going into the corner. Pinion mounts for the j-bar are all different. How far below the center of the pinion shaft is the center of the j-bar bolt?
How are your shocks set? How many clicks off or full compression and rebound on each corner?
Is your right front showing travel (use your travel indicators)?

[hucktyson]

Matt what is the relevance of his click settings when you Have no clue what pistons , shim stacks , needle arrangement or
Compression adjustment stack he has ??? Going full soft to full stiff could move 10lbs or 800 depending on how the shocks are set up.

[Matt49]

Matt what is the relevance of his click settings when you Have no clue what pistons , shim stacks , needle arrangement or
Compression adjustment stack he has ??? Going full soft to full stiff could move 10lbs or 800 depending on how the shocks are set up.

Yes the pistons and shimming matter a ton but if the guy comes back and tells that he's got the RF compression 2 clicks and the LR rebound at 2 clicks, I think we've found our problem.

I know that you don't think the adjustments on the shocks do anything but you're wrong about that. 1 click of adjustment on some shocks makes a huge difference (e.g. going from 8+1 to 8+2 on the rebound side of Geneses BRD.

But that isn't really what this discussion is about. Do you have anything you would like to contribute to help the guy fix his car or are you just starting sh!t as usual?

[Ralphy]

I agree Matt. We have totally ruined some good race cars adjusting anything you could get a wrench on trying to correct handling issues to later find out that our shocks were way off.