If I am in nutral and I rev it up high and let drop down with out giving it gas is it natural to have that backfire sound. I know race cars do it but I do not have a race car. Staright pipe exhaust right now so there is no back pressure.

 

That's normal for a seven especially with straight pipes, my bro's does it with a clogged up muffler.

 

By the way have you done 0-60 yet, i'm looking to do my car like you have your's for now?

 

I haven't done it yet. I just got the carb on today and I plan on taking it down to one of the muffler shops to get an exhaust system put on it. I'll probaly get a flowmaster to put on it. Don't know what series yet. I have onluy had the car a little over a month or so, so I still have get plates for it and insurance. I'll have her on the road in about 3 weeks and I will let you know. I'm going to use one of the zero-G speed measurement boxes. I have laying around the garage somewhere. I'll probaly have someone measure my on my radar. One perk to being a cop.

 

mine does thjat, xept with the added bonus of flames out the tail pipe...course mine has a dellorto intake rb header....free flowing exhast
boy, what a sound.....

 

mine does this too (like most people here) its pretty normal. and going from very high revs down to a heavy brake will cus alot of engine brake causing some HUGE flames out the tail pipe

plus i think mines running kinda very rich..

 

My old Rx-7 w/ a 13B Streetport/Mikuni/RB dual exh set up looked like the Batmobile on fast deceleration. It certainly drew attention.