just wondering idealy what time should a 90 mph 1/4 mile get.

Well that depends on many things such as traction you get off the line. For instance, an AWD car may have 90mph run at 15.3 and a RWD car may have a 14.9 1/4 at 90 mph just because it looses traction off the line but quickly gains it back after hooking up. I'd say generally it would be around 14.9 -15.5 give or take a one or two tenths of a second.

thats what i thought. its just that im doing a 90 1/4 but am getting horrible times. thanks for the help.

yeah a high 14, low 15 is about right

low 15's depending on how much traction off the line....

My quickest run, with a 89.74 mph in the 1/8 was:
12.031 @ 116 mph. That was a with a 1.6 in the 60'

Mid-engine, RWD with a turbo and if I see 90 mph in the 1/8,
I am somewhere in the 12s.