I HAVE BEEN THINKING ABOUT DOING THIS MOD BUT IS IT WORTH IT? WILL IT WORK WITH MY MODS? HOW ABOUT A BBK THROTTLE BODY? THANKS..... :confused:


[Modified by THEMONEYPIT, 2:20 AM 12/11/2001]

 

You won't gain much (3-5 rwhp) with stock heads/cam. But if you're planing on doing a Head/Cam package(10+ rwhp) at some later time then i'd wait until then to get one.....might be cheaper, plus you can have the "Tuner" do the install. :cheers:

 

worth 15 RWHP on my heads/cam. Forget the throttle body..not much gain from it.

 

The throttle body is a very "iffy", at best but the LS6 intake is a winner..especially if you plan to mod the heads/cam.

 

Here is a comparison if Different Head flow and different Intake flow numbers.

On a stock LS1 motor the 01+ intake is not worth much HP. Only about 3 to 5 HP peak. It gains a lot more tho with heads and cam etc...

It doesnt take much for even the 01+ intake to become restrictive in a large displacement high flow motor.

<BLOCKQUOTE>code:<HR><PRE>Without Manifolds - Headflow Only:

Cylinder Head Intake Manifold .200" .300" .350" .400" .450" .500" .550" .600"

Stock LS1 N/A 137 187 207 223 228 237 242 243
Stock LS6 N/A 156 204 225 243 257 268 275 278
Ported LS1* N/A 144 200 225 245 261 272 283 292
Ported LS1** N/A 164 217 234 253 270 284 296 305
Ported LS6 N/A 159 212 236 255 272 300 307 314


With Manifolds:

Cylinder Head Intake Manifold .200" .300" .350" .400" .450" .500" .550" .600"
Stock LS1 LS1 136 184 200 214 222 227 229 235
Stock LS1 LS6 136 186 206 223 227 236 241 242
Stock LS6 LS1 156 199 212 224 232 238 243 247
Stock LS6 LS6 154 204 220 235 247 257 263 265
Ported LS1** LS1 141 185 205 222 232 241 251 258
Ported LS1** Truck 163 206 224 237 249 262 265 270
Ported LS1** LS6 166 211 229 244 257 269 277 283
Ported LS6 LS1 156 199 217 230 242 253 263 268
Ported LS6 LS6 153 202 222 241 257 270 280 289</PRE>[/QUOTE]

* Original Stage II heads from New Dog, Old Tricks; GMHTP May/July 2000

** Latest revision.

Info originally from Chris Endres

 

With heads/cam I think so. Without I don't think the gains are much.

 

That's what I've heard too.

 

Kewlbrz
Very interesting chart. What is a "truck" intake? Is the truck version of the LS1 vasty different from ours?
Thanks
Ira

 

The 4.8/5.3 and 6.0 Liter Engines are mechanically the same as the LS1/LS6 5.7 liter engines. They use different intakes, cams, and such, but things like heads, crank, etc are interchangable. Much like the small block chevys of old interchangability.

An ineresting tidbit. The 2001+ 6.0 liter aluminum truck head is identical to the LS6 head, except it has a little larger combustion chamber. Ideal for Forced induction.