3800 Help with Pulley Sizes

[Mikes1998GTP]

I found a guy off E-bay that makes his own MPS system and was offering the pulleys in a variety of sizes... Ebay Link

If you're not sure what size will work for you, feel free to email me with a list of your mods. Here's a rough estimate of what size you can go with...

3.4 stock car with cold air intake

3.3 stock car with cold air intake u-bend delete and Colder Range Plugs

3.25 cold air intake plus colder and a very free flowing exhaust (hi-flow/no cat, cat back, u-bend delete, etc.)

Any smaller than that and you're going to need some more engine work to either cool the intake (intercooler) or greatly increase intake/exhaust flow (ported heads/supercharger, headers, camshaft, etc.)

Personally, from what I've been told, to go less then 3.4" would require an intercooler setup, is this guy really off or is it possible to go down to a 3.3" or 3.25" and see even more gains without the worry of causing more damage? I'm running a 3.4" now, but are these MPS systems any better? Any suggestions?

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[preussenGTP]

that pulley set up looks just like zzp or intense( )
either way, he's just a buisnessman looking to sell his item. .that looks like a nice pulley kit for a decent price.
i wonder if zzp and intense( ) pulleys would work with it..?
you'd have to be smoking crack to put a 3.4 pulley with intake only. lol

 

[1quick]

I ran a 3.25 with cat back an intake and rockers with no nock and a 3.4 with intake only with no nock

brett

 

[PANDA]

W-Body Store Says This:

(3.5 - 3.4" pulley) - Cold Air intake, U bend/ downpipe replacement, DHP PCM, 180 degree thermostat, Autolite 104 plugs
(3.3 - 3.2" Pulley) - All the above plus: Rockers or a mild cam, ported manifolds or headers
(3.1 - 2.8" Pulley) - All the above plus: More aggresive cam or intercooler, ported & polished heads, more specific tune (PowrTuner)
(2.7 - 2.6" Pulley) - All the above: More aggresive cam and intercooler.

 

[imported_PaceCarBoozer]

everybodies car seems to be a little different, I ran a 3.25 before I had my rockers, just a CIA and a downpipe, with stock plugs and no knock, but some people have alot of problems with knock, you could definetely run a 3.4 on your set up though.
CJ

 

[alexgtp]

I ran a 3.25 with only a CAI and no knock when i first got the car.

Now I run a 3.4 with IC DHp and get all sorts of crazy knock..

All depends on what mood the car is in!

 

[syP]

aint it the truth

 

[superchargedgp]

2.55

 

[phat_ridegt]

before afc tune i ran a 3.2 with ssic and u-bend/cat-back on pump gas with like 3-4kr...after tune im running a 3.0 (plus togs) w/ <1*