I was just reading the new issue of SCC and It showed a dyno of the JG edelbrock header with both the street downpipe and the race downpipe w/no cat and straight exhaust(like the DC race header) on a B16A1. With the race downpipe they recieved significant gains in hp and no loss of torque as opposed to the minimal gains they got with the street down pipe,cat,and exhaust. I always thought that running an open header would cause a loss of torque. I had an axle back exhaust on my SI and I removed it again today. With the stock b-pipe and resonator in place it isn't loud at all without the muffler. I mean, if an open header would cause power gains then an open muffler would cause power gains as well albeit not as much but more than having an axle back in place right? I was just wondering if I would lose power with this setup.


[Modified by SiKSiR, 4:12 AM 3/8/2002]

 

ttt

 

i think that since that race b pipe has some extra length to it it helps with the torque issue, I can't remember if it lost any on the bottom end of the curve. I'll have to look at that magazine tonight to see.