They seem to be fine at 60 mph, as long as the road is good and they're warm. Obviously they spin at WOT below probably 55, I think the 3.15 gears make a big difference. If I was in my lowest possible gear at 60 mph and just stomped it, the tires would break a little but I'm usually a gear or...
Make an RNG to determine what you should do. Its even easier if you can flip a coin over it, I do this with a lot of decisions.
Then you won't feel bad regardless because it was fate and out of your control.
I have a base model 18 GT with an edelbrock stage 2 on e85 and I make about 801whp through cats and stock exhaust at 6950 RPMs. Im very happy with the power level, after I added a fuel system for e85 and got a real tune the bottom end torque is crazy, even at 20 to 40 percent throttle. If you do...
I would think these would be made from carbon composite material much like some of the new general electric turbine engines for the new boeing jetliners. I'm not sure if these will be reliable in the short term, but long term they will take over.
I have access to consistent 85 to 90 percent E currently at less than 2 dollars a gallon.
I really don't trust pump gas on these 12:1 engines without methanol. If I didnt have access to e85 I'd probably have gone that route I would not trust 91 on any of these stage 2 kits.
They're both good I have the edelbrock stage 2 with and e85 fuel system and it moves, instant power. The stock tune was not great, no part throttle power at all. I'd reccomend you get a good tuner and an e85 system on either it's literally night and day.