Are the B4C's any more powerfull from the factory in hp and tq) than the non B4C Z28s in 1991-92? Thanks.

 

No

 

OK, thanks. I thought that police versions of cars would be more powerful than other stock cars. Kinda stinx.

 

Actually I think the difference is they all had the better gear ratio, and so the seat of the pants driving would be better than if it was only equiped with the tall gear.

Other than that even the 1LE cars have the same powerplant, even the players cars had the same engines for that matter. The biggest advantage is the larger brakes, same as the 1LE's and the larger sway bars.

From what I understand, the 91-92 RS equiped with the B4C is basically the same as a Z28 with the 1LE package. Usually however B4C cars would come with some nice add ons, like cruise, power windows, etc, where the 1LE Z28 usually did not. The advantage the RS had was it would have saved a little (very litte) weight on the lack of the larger spoiler, and the hood blisters etc. But they should get a better cooling system etc. I am not sure if that was standard on the 1LE cars tho.

But thats how I understand it.

I find it really interesting on how many of these B4C cars appear to be out there. A whole lot more than the 1LE cars thats for sure.

 

305's could be had in the B4C's and the 1LE was optional during a portion of the production runs

 

so not all B4C's got the 1LE package?

John

 

I hear it was an option halfway into the 91 run.

 

I would have thought it was standard fare, as usually the police cars get those special things like better cooling systems and brakes...

Learn something new...

John

 

Actually B4C's are G92 perf axle package Z28's in RS clothing. Nothing more nor less except all 1992's had the 1LE brakes(that is all that the 1LE meant to the B4C). I have yet to find a 1991 with those brakes. Probably less than 100 of the 1991's have those brakes(1LE).

 

dont B4C come with better radiators

 

Same KC4 heavy duty cooling radiator that the G92 perf axle package Z28's had.

 

I didnt see a 1LE RPO in my current 92 B4C but it definately has the 1LE brakes and power everything. These cars love to cruise at high speeds on the freeway, feels like something is different with the shifting compared to my 91Z28 with the same L98/700R4 setup (before the tranny went). My last 92 B4C was the same way.

 

Trannies and shifting is the same as well. No special calibrations. Every B4C and Z that I have owned all felt different and they do not all run the same. I have had some fast ones and slow ones. All of the 1992's should have the 1LE code on the spid sheet. I have seen some spid sheets not match though too.

CrazyHawaiian, if you run your vin through the dealer and they print your rpo list, it will definately show up there.

 

Check out my 1992 b4c 1le for sale

https://www.thirdgen.org/techbb2/sho...27#post2550427

 

Player's engines where technically the same as a production engine, but they were basically blueprinted in that they were as close to identical as possible. The same physical casting mold (yes one mold) was used for cylinder heads, cams were measured, injectors flow checked, and so on. All engines were dyno tested to ensure they were withing 1% of each other. The early engines even had the rods marked with their weights such that the bottom ends where essentially balanced according to the specs. So while not more HP, they did not suffer from the variations in production builds. Most people that drive player's cars swear the cars have more seat of the pants power than a stock counter part, and that could be true if the regular assembly line cars varied much from stock. It was also a case of car setup ... a well setup car just feels faster.

I should also add that Players cars came from the factor with a lower volume power steering pump in order to reduce fluid tempatures. While not a sigificant amount, it would have freed up a few HP over the stock counter parts.

The sway bars on the Player's cars were also different than the 1LE counter parts. In 1989-up, both Camaros AND firebirds got the 36mm front bar and the wonder bar. In 1991-up, the rear sway bar was reduced by 1mm over the regular production cars due to oversteer issues.

... just those little known specs. The B4C cars may also have had similar characteristics ... not sure.

Mark.

 

Oversteer goes which way? Isn't that when the back pushes to the outside? I have the larger Spohn rear and the factory front.

 

Correct
- Understeer, push or "Tight" is when you go into a corner and it wants to keep sliding forward.

- Oversteer or "Loose" is when the back end of the car wants to keep going forward while the front is turning. (this is what gets you "Sideways" in a corner.

John

 

It was loose till I got the rear bar, now it is too tight. It bet a front Spohn would fix that, wouldn't it?

 

If they did their homework, I am not sure how extensivly they actually tested it, And with what options it works the best.

IE, If you put on a wonderbar, does that change the roll rate to where you should change the sway bar or not. Also what does the upper strut tower brace do.

I have the stock 36MM front, with the Wonderbar and a strut-tower brace, I have the stock rear, but I have boxed in my control arms and pan-hard bar, with these modifications it sticks to the road like glue, however I can get my back end to swing around a little if I really whip it.

I dunno

John

John

 

There is way too much to the correct balance in the suspension of a car. You could do it by trial and error, but that would be really flipping expensive.

I think I will get the strut tower brace. I already have the wonder bar and the Spohn panhard. They (Spohn) say that the sway bars are matched for the best performance & cornering, but they are trying to sale the things.

I do know that the rear sway bar made a big difference in the cornering characteristics. The car no longer has alot of body roll that scares me and causes me to do a 180 on an on ramp.... Hehe. The wonder bar also made the steering more predictable in a turn. I like the way it makes the car handle on the front. Panhard, same thing, except in the back.

Overall, I'd say the car handles better than when I got it, it just needs LCA bushings (and maybe new LCAs). When you can move the LCAs with litte effort with your hands, that isn't a good thing. Boxed or tubular LCAs?

 

TO answer your question about boxed or Tubular LCA's

Lets face it for best performance you want the least amount of Un-sprung weight you can get. The lower the unsprung weight the more the suspension can perform and act like it was designed to. Thus why there are several cars now that they install Aluminum suspension pieces. My 95 Riv is a perfect example, as is my sisters new F-150.

Thus why I believe they went to an JG1 aluminum driveshaft, the performance gain was not as much through the lower rotating mass, you gain about 1HP from it, as much as your lowering your unsprung weight, therefore giving you better traction...

I would suggest asking what they weigh, and consider from there, I am really attracted to the idea of the aluminum ones... A few years ago I could have bought some, not sure if there still available.

John

 

So, I need to shed some weight from my car? What is the difference between unsprung and sprung? How much is an aluminum shaft?

 

Aluminum shafts run 150 to 250

Sprung weight is all the weight that is above the Springs, the entire body.

The UNSPRUNG weight is that which travels up and down, all your suspension pieces, axel, driveshaft, torque arm, LCA's, Pan-Hard bar, brakes, Rotors, Wheels, Tires, Front A-arm, control arm etc. I am not sure but I think the sway bar is considered unsprung on the rear and partially sprung on the front.

Actually that is the biggest advantage of a independant suspension, although an independant suspension proabably weighs more overall you eliminate alot of the unsprung weight therefore you considerably lower the un-sprung weight of each tire, and it allows the suspension to travel faster and hold to the road better. Granted they designed around the weight of the moving components but its not as important as keeping the weight down.

John

 

Lighter cars with wider, longer stances do tend to handle better. I think that I will look into lightening my car. Faster and better handling. An LS type motor would be nice. All aluminum and the composite intake take 80-100 lbs off the front and make hard turning easier, or so I have read. This started as a B4C post... But it is educational!!

 

There was one difference in the tranny. The automatic valve body would allow full use of overdrive at full throttle. a none B4C will limit you to 3rd gear and partial throttle in 4th.