it's used out of a car that had been 9.18 on the back bumper I had to use the input yoke off my stock one because tbe splines were twisted in his so I have another to try in it . I took it from him cuz it was 80 bucksI'd eliminate U-joints as a possibility, you said it had a Ford Racing aluminum driveshaft, which comes with new u-joints.
I took it from him cuz it was 80 bucks
it's been in there since before I built the car up like I said I think the dyno did it in .Wait wut?
You have a used drive shaft from a 9 second car? Do you even know if it's straight?
it's been in there since before I built the car up like I said I think the dyno did it in .
Yes sir I am on itShould be a simple matter to have it checked.
I doubt the guy who tuned it is incapable or would have let me leave with a car not running right . what I am feeling is not anything concerning spark or fuel it's a vibration . The first hour I was there was spent doing nothing but drive ability.Rule #1 when troubleshooting is 'what changed?' and the very first sentence you say car ran great until after the dyno tune. So basically the tune is screwed up, the guy tuned it for peak hp numbers and ignored how it ran at the rest of the rpm range. Most likely spark timing or injector timing is goofed up. Mounts are fine, they dont create vibrations just help dampen it. Go back to the tuner or throw back in the stock tune and report back before you start ripping **** apart.
If that's the case I will be having vibrating seats tuned into mine lol
Fair enough, just when I read this part of your opening post:I doubt the guy who tuned it is incapable or would have let me leave with a car not running right . what I am feeling is not anything concerning spark or fuel it's a vibration . The first hour I was there was spent doing nothing but drive ability.
I have a wide band in the car if the AFR was out id see it real time . this feels like a drive line based or balance vibration not something that would come from detonation .Fair enough, just when I read this part of your opening post:
"Ok so I put my car together as most know it was great I ran it almost 200 miles everything was awesome . Had the car tuned and after the dyno we now have a vibration that comes on about 2200 rpm and up and I get a nasty rattle in the shifter area . "
It definitely points me towards the tune.
That said, I don't know what your vibe 'feels' like. It seems like it's speed independent, happens at specific RPMs, moving or still, can you clarify that ?
The tune could affect the timing, injector timing and air/fuel ratio all that can cause 'vibrations' of sort, so I still wouldn't rule it out based on what I've read here.