Sneaky Silverado
#115
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What gains did you see from the new pulley?Yourlast dyno numbers weren't on a Mustang were they? I'm curious to see how far off I am from you tq/hp wise as well as 1/4. I know you have wayyy better headers but I think I have a better exhaust setup headers back.
Then again, I can't expect the true 3" duals to work in my favor too much being my headers have 1 5/8" primaries and 2 1/2" collectors. (when I bought the headers I thought they were 1 3/4" with 3" primaries)
I believe your headers would have 18.84 sq. in total at the collectors squeezing into 9.42 at the Y pipe (factory is 3" iirc). I am no expert on exhaust systems so I don't know what size exhaust system headers back would be optimum for the best back pressure, but I would think that the stock y is too small for the twin screw.
My headers sq in would be 15.7 at the collectors then going into the 18.84 sq. in after collectors.
Did I do the math right? hahaha
I wonder which of our complete systems would be better with our vts2300's?
Then again, I can't expect the true 3" duals to work in my favor too much being my headers have 1 5/8" primaries and 2 1/2" collectors. (when I bought the headers I thought they were 1 3/4" with 3" primaries)
I believe your headers would have 18.84 sq. in total at the collectors squeezing into 9.42 at the Y pipe (factory is 3" iirc). I am no expert on exhaust systems so I don't know what size exhaust system headers back would be optimum for the best back pressure, but I would think that the stock y is too small for the twin screw.
My headers sq in would be 15.7 at the collectors then going into the 18.84 sq. in after collectors.
Did I do the math right? hahaha
I wonder which of our complete systems would be better with our vts2300's?
#117
I tried the dynolicious app but it was on the stock tires so hook was a problem. If I correct the 60' to what I had at the track then the time would be about 12.20@110 but take that for what it's worth. All I know is it pulls very well over how it was last summer.
All my dyno numbers before and after have all been on a mustang dyno.
I am not using my smallest pulley yet, still sporting the 3.65". Ill try the 3.2" after I run it to see the differences.
I am not using the stock Y pipe, I'm using ARH's Y pipe. The only part of the exhaust that's stock is from the flex coupler back. It's quiet and I like it that way. To me it's not worth having the noise for minimal gain. Plus I get away with telling people my truck is stock.
All my dyno numbers before and after have all been on a mustang dyno.
I am not using my smallest pulley yet, still sporting the 3.65". Ill try the 3.2" after I run it to see the differences.
I am not using the stock Y pipe, I'm using ARH's Y pipe. The only part of the exhaust that's stock is from the flex coupler back. It's quiet and I like it that way. To me it's not worth having the noise for minimal gain. Plus I get away with telling people my truck is stock.
#119
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I tried the dynolicious app but it was on the stock tires so hook was a problem. If I correct the 60' to what I had at the track then the time would be about 12.20@110 but take that for what it's worth. All I know is it pulls very well over how it was last summer.
All my dyno numbers before and after have all been on a mustang dyno.
I am not using my smallest pulley yet, still sporting the 3.65". Ill try the 3.2" after I run it to see the differences.
I am not using the stock Y pipe, I'm using ARH's Y pipe. The only part of the exhaust that's stock is from the flex coupler back. It's quiet and I like it that way. To me it's not worth having the noise for minimal gain. Plus I get away with telling people my truck is stock.
All my dyno numbers before and after have all been on a mustang dyno.
I am not using my smallest pulley yet, still sporting the 3.65". Ill try the 3.2" after I run it to see the differences.
I am not using the stock Y pipe, I'm using ARH's Y pipe. The only part of the exhaust that's stock is from the flex coupler back. It's quiet and I like it that way. To me it's not worth having the noise for minimal gain. Plus I get away with telling people my truck is stock.
So they gave you those pulleys for free? If so I'm gonna have to give them a ring. I would have rather had that than a damn shirt.
Oh ok I gotcha. I wonder how much the flex coupler back is hurting you? The noise is a battle I am fighting right now. It is way too loud with the bullets. I have an extra magnaflow 3" dual in/out with built in x-pipe that I might put in place of the bullets but I already have an x-pipe ahead of the bullets. I'd rather not pay for extra piping to take the x pipe off so I guess i might just end up with 2x pipes. We shall see how that sounds.
#120
A dyno is just a tuning tool, I wouldn't be to concerned about a number. Track times is what counts.
They threw the pulleys in for free because they had my truck for 4 months r&d'ing it. They told me 3 weeks initially so after a few months of emailing weekly to see where they were at, I asked them about other pulleys for future mods so the guy said he'd just put them in the cab of the truck. I did have to pay for shirts though.
I have a factory duramax exhaust I was going to make work but I think the stock 6.2 exhaust might work better. If I find one I'd be willing to try that.
They threw the pulleys in for free because they had my truck for 4 months r&d'ing it. They told me 3 weeks initially so after a few months of emailing weekly to see where they were at, I asked them about other pulleys for future mods so the guy said he'd just put them in the cab of the truck. I did have to pay for shirts though.
I have a factory duramax exhaust I was going to make work but I think the stock 6.2 exhaust might work better. If I find one I'd be willing to try that.