Not exactly sure if this is in the right section and if it's not I apologize but I need to know what pulley this is. It measures about 3 and a quarter and the car makes about 12psi of boost. I am going to assume it is an aftermarket hub. I need to put a stock size pulley back on this car but need to know what I am dealing with first.

 

Gms2 most likely

 

The stock pulley on my 06 is 3.35 I think...you should be able to run a 3.25 no problem on stock intake and injectors...the boost however is tricky a lot of people claim you can't get over 11pounds of boost out of a stock pulley but I put down around 12-12.5lbs of boost on my stock 06 with 140k miles on both block and SC. You need to find out the exact dimensions of the pulley to know. But it's quite possible it is a stock pulley already.

Why are you needing to replace it with a less performance oriented pulley?

 

That is not a stock pulley at all

 

4 blue bolts are gms2. Stock has no bolts just pressed on.

 

Well it is running on stock injectors and it seems to be fuel cutting around 4 to 5 grand. Figured if I could put a stock pulley back on it and have it lower the boost it would be better. Just wasn't sure if this was a stock hub or not.

 

stock car with stock pulley will boost roughly 12.5 PSI (depending on conditions)

That is a GM stage 2 pulley (blue bolts give it away) - you should boost about 14-15 psi on it.

You may have a stock tune on there if you're experiencing those problems. thats a big no-no. GM stage 2 rev limiter is 7k RPM. if you get fuel cut/rev limit at 6.5k you're still on stock tune.

 

So putting a stock pulley back on it will help it to not fuel cut then. Will the stock pulley go back on or will I need anything?

 

its for sure a gm stage 2 pulley. what color are the injectors? black or green? that will be a telltale if the car has just the gm stage 2 pulley stuck on there, or if it has a full stage 2 kit.

 

The GMS2 pulley has 77.9mm engraved on the side so start looking there.

 

Idk if you can go back to stock pulley once you switch over to the hub can you? Either way op you could pick up some 42# injectors cheap on here and get a tune. Would be cheap.

 

Well I don't plan on keeping this car so I wanted to get it to run right to sell it and that's why I didn't want to have to do injectors and a tune. Figured it would cheaper to put a stock pulley back on. What color are the 42# injectors?

 

Black connectors.... silver body.

Stock have green connectors.... silver body.



GMS2 pulley = 77.9mm engraved on the side
GMRS3 pulley = 76mm engraved on the side

Check it.

 

I'll have to check when I get home. Can a stock pulley fit back on there or is the hub different?

 

stock pulley is a press on unit. so it is like a pulley and hub built into one.

do a custom order with smoothflow pulleys for a 3.35" pulley for the gms2 hub if you want a stock size for that hub.

what do you mean by cutting fuel? hitting rev limiter, or it starts cutting out?

 

Looking at the picture, I believe I can make out 77.9mm engraved on the pulley.

 

You know I'm not sure. My buddy said it seemed like it was getting a fuel cut but it could have just been hit rev limiter. Wouldn't it get fuel cut if it has stock injectors with that pulley? I just bought is car an shouldn't have so now I have to fix a few issues so I can sell it. Willing to sell it cheaper then what I bought it just to get rid of it.

 

You're selling it just because of this issue? Bro it's a pretty simple fix. Check the basics like maf, spark plugs and tune. Does it have an aftermarket intake on it? If water creeps in the tube or there is a crack in it... That can cause fuel cut alone. Any codes?

What RPM are you hitting fuel cut at?

 

God no. If all it was was that it needed bigger injectors I'd keep it. I needs a new oil cooler put on and a whole coolant system flush. The paint isn't in the best shape and there is a few other small things. It's not the car I thought I was buying and it's my fault for not checking it as well as I should have so now I'm gonna fix the issues and sell it.

 

Back in the day I believe it was Cobalt addiction used to sell a Stg 2 pulley that "looked" like a Gm stg 2 pulley but the grooves were deeper and made the diameter smaer at belt contact. You can usually tell only because the belt would sit flush of just below the outer ring of the pulley, where the Gm stg 2 one the belt sits slightly above the ring. I wonder if you have something like this.

Either way sounds like you need a better explanation of your issues that you are having for some here to give you a better ides and understanding of what to look for.

 

Will it is definitely a stage 2 pulley and I went to take the fuel rail bolts off and one of the bolts snapped in half so I said **** it. What would I need besides the factory pulley to put one back on? I have a factory pulley already.

 

You can still buy smaller pressed on pulleys

 

Come on guys, nobody can answer his question?

Can the gm hub be removed and replaced for the stock pulley?

 

Btw op ill buy the hub and pulley from you

 

Yes, it can.