ok so i went to the muffler place to get my straight pipe. i wanted 1.75 but he only had 2 inch. me not thinking said ok. car has no torque bit pissed off. going back there tomorrow to swap the pipe for smaller and i was wondering. will 1.5 inch be alright? or will i still loose torque? will it be better than 2 inch? what sizes do people suggest for just a standard 4k

1.5 inch pipe is to small. If your trying to gain a little power you really need 1.75 inch pipe

with a good straight through sports muffler and resonator.

yea i built myself a 1.75 system when i had the standard carby but after puttin my sidies on it and working the motor it seems to be choking it a bit might build me a mandrel 2 inch system ad try that. oh the joys of working at an exhaust shop :hmm:

See if they have any 1 7/8 pipe. :hmm:

got a 2inch sports muffler today (not a cannon) will put it on tomorrow. this fix things?

Have you retuned it with the new exhaust?

negative. how do i do that

Depends what sort of carb you've got. If it's the original then you're pretty limited, if it's a weber or similar, take it to a dyno shop!