Pulley - Lower vs. Upper

[lafave]

My goal for my Cobra is 450rwhp and at least 450rwtrq, would I be better off getting a 6lb lower or a 2.8 upper. I currently only have a K&N FIPK and plan on getting a catback. I will also get a tune with the pulley choice.

From what I have seen since becoming a member of these boards, a lower pulley produces more torque than the uppers.

 

[jophis37]

if you wanted to keep the stock look you could go w/ just the lower. Though I have 450 hp and 479 tq w/ a 2.76 and it's not enough for me.

 

[lafave]

Do lowers cause belt slip without idlers like the uppers do? Can anyone recommend a good lower, lb and manufacterer.

 

[BLWN03]

Do lowers cause belt slip without idlers like the uppers do? Can anyone recommend a good lower, lb and manufacterer.

That's not possible..a lower add's size, not reduce it like a upper pulley. i am getting a 2# lower for my 2.8 upper seeing i also have a 2.93 upper to switch out to for daily driving,hopefully there will be little to no slip.

 

[RiffRaff04]

If you are 100% sure that you will be happy with 450/450 then I would go with a 2.8 upper. If you plan on making bigger #'s though it would be best to go upper/lower combo.

 

[jophis37]

yeah, what he said. 450/450 sounds like a lot when you first get started, but when you get there it's just not enough..

 

[stangd1909]

I agree with the above....2.8 with what little thats in my sig and thats good for 450/469! But like almost everybody else I want more!!!

 

[davbrucas]

i say send the blower for porting to stieg first...then add the 2.93upper with 4# lower. 500/500 easily...

 

[lafave]

LOL, I know what you guys mean. The thing is, I can't afford to break stuff because it is my daily driver. Once I buy a truck for my daily, all of this goes out the window. LOL

 

[stangd1909]

Aleast you bought the best color for a cobra that they make

 

[RiffRaff04]

LOL, I know what you guys mean. The thing is, I can't afford to break stuff because it is my daily driver. Once I buy a truck for my daily, all of this goes out the window. LOL

Dude, your talking to the wrong crowd here :burnout: . I was originally just gonna go with a 2.9 upper, exhaust, shifter and CAI... now look at my sig :-D . Dont be too scared about breaking stuff, these cars can take a good bit of punishment, JUST DONT GET TOO GREEDY with the power and whatever you do make sure you get a good tune by a reputable tuner like Amazon :beer: .

 

[lafave]

Aleast you bought the best color for a cobra that they make

:beer:

 

[lafave]

Dude, your talking to the wrong crowd here :burnout:

 

[4.6modular]

I don't mean to hijack but where can you purchase a lower from?

 

[stangd1909]

Metco or LFP sell pretty much the samething.

 

[SVTspeed]

is a 2.76 upper with the idler kit.. everyday driveable i planned on getting it.. the car currently would have exhaust.intake.midpipe. then adding the upper, idler kit, and obviously a tune? SO is that everyday driveable?

 

[SVTspeed]

most pple suggest a 74.5 belt with that also.. some say 75.1 but get slip many pple chanegd to a 74.5 and get no slip!

 

[jophis37]

is a 2.76 upper with the idler kit.. everyday driveable i planned on getting it.. the car currently would have exhaust.intake.midpipe. then adding the upper, idler kit, and obviously a tune? SO is that everyday driveable?[/QUOT


I drive that everyday, I aslo can't afford to brake anything, But a good tune is key to great #'s I had 450/453 w/ the predator tune, I switched it out for a rwtd tune and picked up 26 mor TQ. I am now going to put on lower pulley. And btw I am running a 2.76 w/ 3 100mm idlers from bf, no slip on the stock 75.1 belt.