What kind of supercharger is best on a 98. I see the brands are pretty limited. I'd like to put a roots type on rather than a centrifical.
You have one option, the non intercooled KB kit. Thats the only one. No Whipple, NO EATON! And currently there is no available intercooler option for the KB kit and there likely never will be. The most power you will be able to make is 400 rwhp ish. No room for growth. You cannot swap PD blowers or their intercoolers from other year Cobra's onto 96-98 Cobra's unless you swap cylinder heads and a list of other parts.
Go centri or go turbo.
still a hater for the PD blower's eh? only 400 for a KB 2.1L on 96-98 cobras is bullshit- you've only got 400 with a centri?
400ish. That is + or - some rwhp. Hence the ish. And my 400 rwhp was made with 2 degrees timing, 8 pounds of boost, and only reving to 6k rpms because I was seeing spark blow out. With a better tune and better fuel there is no doubt I could reach 450rwhp. With 10# maybe I could see 480-500 rwhp. You cant get that with your 2.1L now can you! I was being constructive in my first post. I answered the OP's question and gave more insight.
And I'm not a hater of PD blowers, they just are not readily available for 96-98 Cobra's. And there is no real room to grow with the KB kit offered because there is no intercooler available.