New Caprice - Discussion forums

My cars on a 1 inch smaller tire and is shifting like 150ish feet before the line. Tried low and instead of blowing up it shifted. I trap at 105 and in 4th thats like 4400 rpm lol stock dyno sheets look flat from 4.2-5k anyway. I primarily race 1/8, im at 4500 at the end there too so it just sucks. ...

Why? Everyone says it marginal between 3.27 & 3.45 but never have data for 2.92 vs either

In the spring ill get a 3.27 but id like to know what to expect for lowering ET. If i have to go thru all 106 topics to find a before & after time slip i will. Seen on the fb page someone said .2 lower but i cant find that comment now

I put a 2.5 x pipe on after the JBA connection pipes and took an L99 Vert Camaro system into the muffler shop, i used square stock from work and hose clamps to wedge the butterfly valve in the bends around the diff on with same 2.5 cutouts and stock mufflers,,, Didnt go any faster, sounds better tho...

Another 1/4 track day! Tried a couple different things today. I had my 2.25 x pipe and 2" stock pipe replaced for 2.5 x & Camaro exhaust. I did wedge the butterfly valves open. I was also messing with drive vs low. My MPHs are well in range of 6k RPM but the car shifts like 90 feet b4 the line Cutou...

Ive been running it all year, best to get a used 1 for 1/2 price imo

Yea!! The up bend after the x pipe that clears that super thin cross brace measures 1.98 OD on mine too. Im on the hunt for camaro exhaust now. 2.25 my ass

What ever these are, are they restrictive??

Not stock cats, i have the JBA catted connection pipes. They meet the 3 inch primary off the header and at some point come down to 2.5 inch. I still have the pup cats on near the diff though

So i ran 13.57 thru the mufflers and a 13.45 thru the cutouts. I thought the difference would be bigger. Maybe the exhaust is to small b4 the mufflers