well, after almost 24 years my car finally roared to life tonight. see my "BEERS ARE ON ME" thread.
after searching this site looking for the best exhaust system i finally made it over to www.Pypesexhaust.com
and looked at their 2.5" Crossflow system. i'm a ground clearance nut and this system definately has that. it sounds real strong at idle not too loud but it will most definately turn some heads when i roll up to the stop light.
rev it up and it gets real loud. not tinny like some of those other systems on the market.
now the bad stuff, i'm not trying to bash Pypes by any means but this is from my experiance installing this kit myself.
this is a very new almost prototype system from Pypes (just came out this summer) so maybe they will work out the bugs i ran into in the next few runs.
1) when assembled the pipes going into the muffler where too far apart and i had to force them into the muffler. didn't like that so i cut one angle and folded it in and rewelded it to take the stress out of the rear pipes.
2) the muffler (which mounts in the stock position between the rear end and the fuel tank) is off center about 1-1/2". i'm a perfectionist and this just bugged me to no end. but, if i pushed the muffler over it forces the passenger side pipe into the rear u-joint. so, i centered the pipe to the u-joint and will just have to live with the off-center muffler.
3) the 2 pipes coming out of the muffler are JUNK. they are not bent right to mount as the original dual exhaust did. i could not use the repo hangers. the drivers side is a little too close to the tire for my liking but will work for now. i was able to use the 2 hangers that mount under the trunk after twisting them about 45*. looks like they belong there so i'm happy with them.
4) i ordered the angle-cut chrome tips to exit out the back. they do not look right at all. one was even 2" longer than the other so mine stick out a little different from side to side. when the tips were put on the JUNK pipes they hung down about 7" from the tailpan before they were level to the ground. yes, it looked really dumb.
5) i had to cut off over 3" on each JUNK pipe in order to make the tips look halfway presentable. they still angle up a little.
6) when my car is ready she will go to the muffler shop and have the 2 rear pipes and tips reworked to my satisfaction. from the muffler forward everything will work just fine.
from the muffler foward this system is great barring the off-center muffler.
there is a ton of ground clearance with my thorley headers. when looking at the side of my car you cannot see any exhaust except the lower edge of the flange on the headers. everything is tucked up level or above the bottom of the subframe. my sub will hit before any other part of my car bottoms out. looking under the car from the front it looks beautiful and all business.
i've noticed at about 3500 rpms that i get a little blat sound but this may be that my carb isn't adjusted and the motor is still tight. i'm running a ZZZ crate motor from GM i bought in 92' and added full roller rockers with a holley 750 double pumper so it raps extremely fast now. i am using 302 Z/28 motor mounts, my HEI distibutor fits with clearance.
i am very satisfied with the sound, somewhat dissatisfied with the quality. extremely satisfied with the ground clearance.
i didn't need reducers since the thorley's are 2.5". i just went to the muffler shop and had them flare some pipe to fit my header donuts and cut them to length. it's a sweet setup undernerath now.
FACT: if you go to pypes website and click on pics, you'll see a 69 camaro and a 69 firebird they claim both have the crossflow system. i've looked at those pics dozens of times during my installation and it finally occured to me that the pics where all of the same car. they don't have any pics of the camaro, yet they claim the pics are. look at the oil filter it's on the wrong side and then you start to notice that the pics are all from the same car.
i would recommend this system if you're looking for something a little louder than stock, and most definately for the ground clearance. maybe pypes will work out the bends to fit a little better in the near future, i hope they do, then this will be a kick-a$$ system for first gens.
the system comes with a "racepro" muffler. i'm sure it's the loudest. there are about 3 different mufflers available i think.
when my son comes over thursday night i will try to take a video and sound clip to post. however i can't post since i don't have a website yet. if somebody would be kind enough to donate some space i'll forward the clip to them and then everybody can hear it. pypes has a sound byte but it doesn't do the system justice for sure. i believe the test car's motor is stock.
sorry so long, but i know that exhaust is a huge subject on this forum and the more info we have the better decisions we can make the first time.