ACE1252

I bet your referring to this....

shoebox

So, it was not the addition of the cat, but a change in pipe size (though I never saw any advertised changes in advertised HP in 1995 for the 2 cat car. Perhaps it was not worth the bother?).

ACE1252

I got under my Z tonight looking for possible bent issues with my new LS1 brake upgrade(spindles, control arms, etc.). They can't get the alignment right.....anyway, while I was under there I looked at the y-pipe. It is mandrel bent sure enough. If I recall, I think I've seen the y-pipe on a 95 and down....I think it's kinda wavy in the bend. I'll try to find an exhaust upgrade article in one of my GMHTP mags to see if that is the case.

They may have been saving it as something to add to the specs of the next model year(sales thing).

Ok4thGen

Theres Many Many Differences in the 1993 LT1 then 94+ LT1's,

1993 differs from other years
Mainly, Speed Density, a memcal removable chip you can tune,
22 lb injectors unlike 24 lb in 95+ years, Different injection style, hence the reason you cant use a 93 style intake on later years unless you have the fuel rails from a 1993 or decided to make room for the crossover tube with a die grinder.

4l60 auto tranny with the kickdown cable to the throttle body.
and the m6 cars could come with 2.73's in the *** end.

My 1993 ran considerbly faster times then my 94, but theres no basis other then time slips to prove it hard to compare two 160k mile engines etc.

you will hear from people that the 1993 is considered faster stock like tho

1994lt1ss

honestly i have a 1993 camaro z28 and i also have a 1994 the 1993 z28 with a 6 speed roughly runs a 14.0 quarter mile to a 13.8 quarter mile time stock my car has a hard top no power seats no leather traction control but turnd off and a 3.23 rear end the differenced are that the 4l60 and the 4l60 e transmission is about an extra 100+ lbs to the car with all the servos and electrical **** also u have thecoils on the engine weight for every say about 12lbs heavier the car is is a horsepower lost so if if you figure it out my cars roughly 3900-4100 lbs stock and trust me its faster than the trans am's from 1993 -97 and is faster than the 1994 camaro and also the 1996 camaro also it really matters if u can get it off the line cause my car sticks like a mother****er when its brake torqued to 1,000rpms and i launch it but anyway its just a weight thing options in the car will decide the faster person so really if u have leather seats 4l60e trans bose stereo t-tops **** like that compared to somebody that doesnt you will lose one of my buddies has a stock 1996 trans am leather t-tops and 4l60e and i have smoked him smoked my fathers 1994 z28 with cloth seats standard radio and t-tops and smoked a 1996 camaro z with leather seats with 4l60e and bose radio also a convert trans am 1996 with leather.


so just go figure maybe i just gotta good car lol but let me tell ya that i have tried racing the 2006 6.0L GTO and that was a 6speed rated at 400hp and 400ft/lbs of torque and i stayed right on his *** and that was from a 30mph roll to say about a 100 but he was pullin pretty good so i dunno for something rated at 275 hp and 325 ft/lbs of torque sure seems fast to me lol really the cats dont make that much of a difference i dont think just gearing and power to weight ratio.

96' Formula WS6

Congrats on the world's longest run-on sentence. But on a more serious note I think the 10 hp was just for advertising saying out new car is faster. I think we all know the 1LE cars are going to be the fastest but I cant think of any dyno numbers.

wildweasel

This has become a ridiculous thread. There are big diferences in the exhaust systems from 95 to 96. The 96 Y pipe is much longer, so you get better scavaging. And YES, two cats on SEPARATE pipes WILL flow better than ONE cat after the Y. That's why when you go through a toll road there are multiple booths instead of just one booth that every car on the highway has to go through! These two factors can easily account for the 10 hp difference quoted by GM. True, from a car to car standpoint it might not be EXACTLY 10 hp. Might be 5, might be 15... but the 96's+ DO make more power.

SNOTGREEN

It's a shame really this wasn't a debate 10 years ago. I don't know how good of info you can gather when either everybody's fbody at this point is altered, or has wear/tear and mileage making the results nearly obsolete on doing a comparison.

And we're only talking about a few horsepower, if any.

I'd say the 1LE and B4C cars will top out as the quickest, as they would likely have been among the lightest, with the fewest power options and pair it with the T-56 and I believe you would have your winner.

These of course, to be exceptioned only by the 110 LT4 Camaros and 29 LT4 Firehawks.

PWR-TRIP

Hard to read without any comma and period in the sentence. Were you saying that you had "Traction Control" off? Didn't traction control came optional in 95?

powerslide350

Traction control was standand on all 95's I think.

Heres a comparison of my 93 auto with 2:73's VS a 96 TA M6 (my friends)

Both cars have right at 120K miles, both hard tops, both with same power options (pw locks/windows/dr's seat, both cars where bone stock except for identical CIA's and identical cut-outs that I installed.

We raced from a dig twice and my 93 had about a car length both times. First round I jumped ahead at the start and never stoped pulling, second race he got the jump but I passed him at about mid 2'nd gear.

We are both decent drivers, and he can handle the M6 pretty well. Needless to say we where both supprised at the outcome.

93 LT1's also have a slighly larger cam than the 94-97. Thats why they are faster! :smiley:

Now that we both have headers, were going to race again.

rbaksi

Traction control isnt standard on all 95s definately because I dont have it lol. I think it became an option in 95

powerslide350

standard on the m6 cars..

PWR-TRIP

Negative. I have an M6 Z28 and i don't have any TT. They came as an option in 95 and standard in 96.

I'm glad i don't have it on mine.

RealDealZ28

I don't have it on my '95 either. Definitely not a standard item.

Edit: My car's a factory M6 also

wildweasel

Huh? Pretty sure I don't have it on my 96. If I do then it doesn't work worth crap.