Originally Posted by Whippled 496

I have been trying to get some answers on alternatives to my 2.3L compressor, hoping Whipple might have some suggestions. I have maxed this 2.3L pump out as far as I can tell and would love to add a few more cubes. I really cant do anything to the truck because I fear i will lose what little precious boost i have.

I wanted to add exhaust to it but I am afraid if i open it up a little, i will lose even more boost. I only see about 6-7psi MAX with my setup (with intercooler) and I know that 3.3L would wake this baby up a bit. I have a solid SD tune in it and know it could handle some more boost with a new set of injectors and fuel pump.

Anyway, i hop on Whipples site and to my suprise, they dont even offer the 8.1L kits anymore!! Why? Because they dropped the 8.1L from the engine line up? That just sucks ***! I dont want to spend the bucks getting into custom intakes and stuff, but it looks like no one is manufacturing blowers for the 8.1L trucks anymore. Not Kenne Bell, not Whipple, and I assume not Maggy either. Us 496 guys have it hard enough trying keep up with the small block guys and now this........Sorry, just thought I would pop in and wine a little. Maybe its just time to yank off the whipple, buy a 1500 RCSB 4WD, and join the small block team....

Originally Posted by laynlow77

give whipple a call on monday and ask for rick. ill also be there sometime next week if you want me to check it out.

Originally Posted by dewmanshu

Yeah, I bet opening up the exhaust will do some real good. I know the boost is precious to you, but you know it is pretty simple for FI...get the exhaust OUT, quickly. Maybe even some larger cat's if you don't want to large the cat's. Get er done! (and then throw a 50-75 shot on there)

Originally Posted by ludicrist2500hd

We have been doing the same thing as you i have installed SW longtubes on a 06 2500hd 8.1 with wipple kit gained 40 whp and 50 wtq on our mustang dyno it made 370 hp and 560 tq all under 5000 rpm and this was through a 6 speed allison . You have to watch the rods are weaker then the ls1 stock stuff as per Raylar. I just built a 525 stroker for this truck forged with Raylar heads and manifold. Expecting 950 hp and 1050 tq at the crank with the whipple as per whipple we can overspin it to 21000 rpm and that should net us 5.5 psi tops . I want to put 2 gt35's on it but the customer want's that instant blower feel . I'll keep you posted on this build and let you know what we come up with . But If I where you I would throw some LT's from SW and a good cat back .

Originally Posted by Whippled 496

So you're thinking a more free flowing exhause with 5 lbs of boost will net better results than stock exhaust and 7lbs of boost?

Originally Posted by trever1t

absolutely.

Originally Posted by dewmanshu

I was thinking about you while I was doing 125Mph today...you were on my mind.

I am copying and pasting here...I don't actually know the sizes myself, but it's well worth mentioning in your setup.

496 = 4.250" x 4.37" (2001 Vortec 8100, 8.1 liter)
454 = 4.250" x 4.00"
427 = 4.125" x 4.00" (2006 Gen.IV, LS7 SBC, titanium rods)
376 = 4.065" x 3.622" (2007-later, Gen. IV, "L92", Cadillac Escalade, GMC Yukon)
364 = 4.000" x 3.622" ('99-later, Gen.III, "LS2", "LQ4" 6.0 Liter Vortec, 6.098" rod)
325 = 3.779" x 3.622" ('99-later, Gen.III, "LM7", "LS4 front wheel drive V-8" 5.3 Liter Vortec, 6.098" rod)
293 = 3.779" x 3.27" ('99-later, Gen.III, "LR4" 4.8 Liter Vortec, 6.278" rod)

(info gathered HERE)

LMAO no wonder you are always wanting more boost...fuggin cylinder is a 1/4" bigger in diameter and almost 3/4" longer stroke....X 8 WOW