A '85-'86 5-speed with cat delete feels fast, but can be made into a true supercar with PorKen power.
1) If you use good gas, the valves will be clean. The only way to extricate the 1-2mm thick black goop where the injectors don't spray is by removing the intake. The goop extends a few inches up the intake legs. (It's old gas which gels on the walls.)
3.) PorKensioner is the best option.
4.) Run one or two steps cooler. EG. WR6DC(+)
5.) PorKen chips are the only chips available for '85-'86 that actually make a real difference in torque and power. Ebay=Autothority were made in '91, and have
stock WOT LH and EZF maps!
(They cannot dyno higher than stock.) Ebay=AT chips are modified in the medium load areas, but it is crudely done, and will often ping at part throttle, even with super.
6.) X-pipe and PorKen chips consistently make for 40+rwhp over stock. (300+ ftlb @ 2500 rpm!)
8.) More than four degrees difference between the two banks will really lower the power!
11.) Stock filter filters and flows better over time, and won't damage the MAF.