Dropping Pulley Size
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Dropping Pulley Size
Sorry if this has already been asked, i did a quick search and didn't see anything obvious...
I'm running an 06 SC, only has intake and Ingals TD, i'm saving up for the TVS charger and supporting mods but i really want a little more until then so i was wondering if it would be safe to drop from the stock pulley to a 3.1 without having to do bigger injecters. i'm up here in denver so alt. is over 5k feet...
I'm running an 06 SC, only has intake and Ingals TD, i'm saving up for the TVS charger and supporting mods but i really want a little more until then so i was wondering if it would be safe to drop from the stock pulley to a 3.1 without having to do bigger injecters. i'm up here in denver so alt. is over 5k feet...
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You are not going to pick up that much power with just a pulley swap and at over 5K feet, I would think you would go lean a bit faster than others closer to sea level.
#4
Sorry if this has already been asked, i did a quick search and didn't see anything obvious...
I'm running an 06 SC, only has intake and Ingals TD, i'm saving up for the TVS charger and supporting mods but i really want a little more until then so i was wondering if it would be safe to drop from the stock pulley to a 3.1 without having to do bigger injecters. i'm up here in denver so alt. is over 5k feet...
I'm running an 06 SC, only has intake and Ingals TD, i'm saving up for the TVS charger and supporting mods but i really want a little more until then so i was wondering if it would be safe to drop from the stock pulley to a 3.1 without having to do bigger injecters. i'm up here in denver so alt. is over 5k feet...
#8
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My god, just answer the man's question people...
Yes, you can run a 3" pulley on a stock car/tune without a problem. Many people on here, including myself, have done it, some for over a year. You being at higher altitude might make it possible to go even smaller, but I don't have any actual evidence to support that so I can't say. You will be fine on a 3.1" pulley for sure.
Yes, you can run a 3" pulley on a stock car/tune without a problem. Many people on here, including myself, have done it, some for over a year. You being at higher altitude might make it possible to go even smaller, but I don't have any actual evidence to support that so I can't say. You will be fine on a 3.1" pulley for sure.
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My god, just answer the man's question people...
Yes, you can run a 3" pulley on a stock car/tune without a problem. Many people on here, including myself, have done it, some for over a year. You being at higher altitude might make it possible to go even smaller, but I don't have any actual evidence to support that so I can't say. You will be fine on a 3.1" pulley for sure.
Yes, you can run a 3" pulley on a stock car/tune without a problem. Many people on here, including myself, have done it, some for over a year. You being at higher altitude might make it possible to go even smaller, but I don't have any actual evidence to support that so I can't say. You will be fine on a 3.1" pulley for sure.
the only reason i don't want to do any exhaust work yet is because i was told you need to run three inch piping for optimal use of the TVS ... well a three inch on a stock motor SOUNDS LIKE **** IMO
Last edited by Noir_Destruction; 01-16-2009 at 11:05 AM. Reason: Automerged Doublepost
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Exhast theory is a huge debate, its about where the powerband goes, you dont "lose" power from too big of an exhaust, you just shift your powerband higher. In theory, you could go so big that you will be out of the practical rev band, but go bigger now to avoid changing things twice.
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Another Question
so my numbers aren't matching up here... i thought the stock pulley size was a 3.3" pulley (83.8mm)
well on crateenginedepot i looked so see what size the stage 2 pulley was for GMPP and they say that the pulley is a 77.9mm (3.06") down from the stock 79mm (3.11")
so which numbers are wrong and what size is the GMPP stage 2 pulley... the reason i ask is because my roomate has his sitting in a box (he dropped to a 2.8) and i didn't know if i just bought a Hub if i'd be able to just use his old one to drop down to w/o having to do injectors or tune...
well on crateenginedepot i looked so see what size the stage 2 pulley was for GMPP and they say that the pulley is a 77.9mm (3.06") down from the stock 79mm (3.11")
so which numbers are wrong and what size is the GMPP stage 2 pulley... the reason i ask is because my roomate has his sitting in a box (he dropped to a 2.8) and i didn't know if i just bought a Hub if i'd be able to just use his old one to drop down to w/o having to do injectors or tune...
#17
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The stage 2 pulley is 77.9. The stock pulley is bigger than 79mm, I don't know where that came from. It's about 3.35", not 3.11".
Yes, you can put a stage 2 pulley on a stock car with no other mods and be fine. A tune would yield more power, and injectors would allow you to raise the rev limit higher and get more power out of the car (Stage 1 basically), but for now you will get a nice increase in power just with the pulley.
Where are you in Colorado, buddy of mine just moved back up there with a red 07 SS/SC.
Yes, you can put a stage 2 pulley on a stock car with no other mods and be fine. A tune would yield more power, and injectors would allow you to raise the rev limit higher and get more power out of the car (Stage 1 basically), but for now you will get a nice increase in power just with the pulley.
Where are you in Colorado, buddy of mine just moved back up there with a red 07 SS/SC.
#18
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Sorry if this has already been asked, i did a quick search and didn't see anything obvious...
I'm running an 06 SC, only has intake and Ingals TD, i'm saving up for the TVS charger and supporting mods but i really want a little more until then so i was wondering if it would be safe to drop from the stock pulley to a 3.1 without having to do bigger injecters. i'm up here in denver so alt. is over 5k feet...
I'm running an 06 SC, only has intake and Ingals TD, i'm saving up for the TVS charger and supporting mods but i really want a little more until then so i was wondering if it would be safe to drop from the stock pulley to a 3.1 without having to do bigger injecters. i'm up here in denver so alt. is over 5k feet...
oh and with the 3.1 pulley i am now at 16 psi spike around 16.5 untuned. i could be off by a pound. i havent really watched the boost gauge. too busy trying to keep traction from a 2nd gear pull... (need tires)
Last edited by 06SS ALL DAY; 01-20-2009 at 12:08 PM. Reason: Automerged Doublepost
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The stage 2 pulley is 77.9. The stock pulley is bigger than 79mm, I don't know where that came from. It's about 3.35", not 3.11".
Yes, you can put a stage 2 pulley on a stock car with no other mods and be fine. A tune would yield more power, and injectors would allow you to raise the rev limit higher and get more power out of the car (Stage 1 basically), but for now you will get a nice increase in power just with the pulley.
Where are you in Colorado, buddy of mine just moved back up there with a red 07 SS/SC.
Yes, you can put a stage 2 pulley on a stock car with no other mods and be fine. A tune would yield more power, and injectors would allow you to raise the rev limit higher and get more power out of the car (Stage 1 basically), but for now you will get a nice increase in power just with the pulley.
Where are you in Colorado, buddy of mine just moved back up there with a red 07 SS/SC.
i am runing a 3.1 right now. i put in the step 1 colder ngk plugs. however when i changed my plugs i was running rich already on my stock ss/sc. i did not receive any codes or anything weird even on my 5th day. i did some WOT test's and it ran purrrfect. just when you change your plugs make sure your running at least a little bit rich. if your already running lean. i would not recommend the smaller pulley until you have a flash re-tune or a dyno set up. but if your running rich, go fer it
oh and with the 3.1 pulley i am now at 16 psi spike around 16.5 untuned. i could be off by a pound. i havent really watched the boost gauge. too busy trying to keep traction from a 2nd gear pull... (need tires)
oh and with the 3.1 pulley i am now at 16 psi spike around 16.5 untuned. i could be off by a pound. i havent really watched the boost gauge. too busy trying to keep traction from a 2nd gear pull... (need tires)
is there any way to watch my air fuel mixture more closely without getting a wideband?
Last edited by Noir_Destruction; 01-20-2009 at 11:33 PM. Reason: Automerged Doublepost
#22
i wouldnt do it man .... for the kind of boost/power levels you will produce with a 3" pulley your idc's will be off the charts, and you may risk damaging your engine .... don't be in a rush to put the pulley on unless you have the proper supporting mods.
#23
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i'm running a 3.1 zzp modular pulley w/ step 1 colder plugs and stage 2 belt. no issues, no CELS nothing. HOWEVER, when i changed my spark plugs i was already running RICH on factory tune. therefore i proceeded to drop the pulley size. but if your running regular or lean DO NOT do it, you will ***** your motor. plus even if you decide not to listen to us. don't run your car WOT all day everyday. personally i don't think you should put theh 3" on. not worth the risk. but i would check if your running rich or not. when i mean rich i mean RICH
#25
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when you go to change your spark plugs. 1st of all all the cyl. must be running rich it can't be just 1 & 3 or 2 & 4. ok so when you pull the plug out. put the sparking end up to your nose and take a wiff. if you smell a STRONG odor of gas your running rich. if there is actually fuel residue and its a strong smell at the same time your running really rich. like i changed plugs on my friend balt and he was only running really rich on 1 & 3. (he is staying stock though) but if he would of said he should i put my pulley on? i'd say no. plus if your going down to a 3" you really need 42 injectors... the stockies can handle up to 3.1 according to zzp but they highly recommend getting the 42's from 3.1 to 2.9 pulleys. than of course 60's after that. the only reason i put my pulley on is i had a friend do it because he had the pulley puller and i had the time to actually do it since i'm always busy. also i dont race all over town or nothing, i rarely build boost unless its on a sunday aka the philly meets and i'm bound to race there. but if i were you i'd get the injectors and pcm/dyno tune before putting on the 3" seriously dood. but it is your car and your free to do whatever you want.