nos
i dont use my riviera as an every day driver, i only drive it in nice weather, about 2000 miles a year. i have not been to the track yet, but i have ran it with a g tech meter. i got 13.4`s, that is with a 50hp shot of nos, easy off the line, hit the button at 3000 rpm in 1`st gear and holding it through 2`nd, no nos in 3`rd. i expect better when i can spray the whole quarter, im afraid to hit the speed limiter on nos. i have ran with 3.4 3.25 and 3.0 pulleys. 3.4 would be best for every day use, stock fuel system will be ok, 3.25 or smaller should get adj. regulator. pulleys smaller than 3.4 will generate a lot mor heat in the charged air, i run race gas or octain booster. i`m trying a new booster called tk7, but may be awhile before i'm back out with it since it`s 20 deg`s out. anyone know where those 1.9 ratio rockers come from.