lt1z350

Just trying to use others experiences here on what they got and if someone happens to read this can say damn dont buy these or yeah these are great thats all. We all have bad days and get cranky. I saw where one guy was replacing his gibsons and found this article. we all know long tubes are better but here are some numbers all the way up the curve and saw that you get some great gains over stock in low end torque which was what I figured as my z28 did also and both are ls engines this one just not having as much cam so guessing why not seeing such the big gains as a performance car.
http://www.fourwheeler.com/techartic...ers/index.html

Line-by-Line Dyno Result
Stock Gibson Stainless Works
RPM HP TQ HP TQ HP TQ
3,126 170 283 186 312 191 320
3,226 192 312 195 318 198 321
3,326 202 319 204 321 207 327
3,426 212 323 212 324 215 330
3,526 219 327 221 329 225 334
3,626 232 335 229 332 233 337
3,726 240 338 241 339 243 343
3,826 249 341 248 341 252 346
3,926 255 341 257 344 260 348
4,026 263 342 264 344 268 350
4,126 270 344 271 344 276 351
4,226 277 343 278 344 283 351
4,326 284 344 284 345 291 353
4,426 288 341 288 342 298 353
4,526 294 340 293 340 305 353
4,626 298 338 299 339 311 353
4,726 301 335 303 337 315 350
4,826 305 332 308 334 319 347
4,926 307 327 310 329 322 343
5,026 309 322 314 327 325 339
5,126 309 316 316 324 327 334
5,226 311 313 317 318 330 332
5,326 311 307 319 314 332 327
5,426 All Done! 317 307 331 321

Peak Numbers
Horsepower Torque (lb. ft.)
Stock 311 @ 5,176 rpm 345 @ 4,076 rpm
Gibson 319 @ 5,176 rpm 346 @ 4,276 rpm
Stainless Works 333 @ 5,376 rpm 355 @ 4,476 rpm

seems like a lot for a stock truck but in the article said the dyno was reading 10 to 14% higher.
He didnt have any issues with the pacesetters on his truck other than hearing the lifters through the pipes I guess. Just said the engine was running a lot louder and could hear tapping while driving. I just got my taxes back so ready to buy and torn between the pacesetters and obx now as I havent seen any other long tubes with a y pipe in the 600 dollar range. 550 for obx and 611 for pacestetters with the offroad y pipe. only thing I dont like on obx and why dont go for them with being stainless right off the bat is the 2.5 collector on it probably kills some of the power over the pacesetters 3 inch. Dont like the cheap ebay ones as they have that pipe that bends up then down where the obx doesnt have that and why would go with more expensive obx. Will keep looking today slow at work so have some time. Just want to get ordered as now seeing some more numbers on it am missing out on saving some money on gas and quite a bit of power.

FrankyRST

iTrader: (7)

check speed engineering---------->
pacesetters are about 550

lt1z350

speed engineering isnt showing them for a 07 4x4 but they are on sale for other models now there so i keep looking or go with obx.... ugh what to do. I want the best I can get for around 800 is what I have to spend on them now so keep saving or get something around 550 like obx or pacesetter.