I've still got the factory drive shaft on my procharged 18 auto making 860rwhp. I drag it a lot with sticky rubber and it handles it OK. I have snapped a half shaft tho. I looked at getting a light weight replacement but was worried about vibration and NVH as it's still a street car.
It's a normal street registered car. I race it several times a year. It's run 9.8 in the 1/4. The day before it broke I won a roll racing event with no drama. The next day, doing a 1/4 mile pass she snapped half way down the strip.
Mine is an 8 rib. All the info I researched before install was about 50/50 for and against crank support. I would recommend installing it just for peace of mind.
It's a good idea. I've got a stage 2 P1-X making 860rwhp on E85 and I snapped the crank. Dumbass me didn't have crank support. Very expensive repair bill.
As others are saying, flash back to stock and see if any different. Also when loading a tune, make sure you're battery is fully charged. I've been caught out before loading a tune with a half charged battery. The entire tune didn't load properly. Good luck.
So I'm thinking of installing a Procharger in my 18 GT 10R80. Looking to get 650-700 rwhp. Do I have to upgrade other mods i.e injectors, fuel return valve, etc or can I stay with factory settings? Just want a weekend cruiser and a weapon when I put it down the strip occasionally.