Woohoo...my freaking car finally has some balls!
pressure test the old IC for leaks... easy to do. I bet its just from the larger / better flowing core with less pressure drop. Can you post your old graph so we can compare the climate conditions / correction, etc?
If you really picked up 30hp from just that core on a base vortech kit, i think all the vortech guys have a new item for the top of their list.
If you really picked up 30hp from just that core on a base vortech kit, i think all the vortech guys have a new item for the top of their list.
ya, my theories on the cutout are that it wouldn't really increase hp that much if your exhaust isn't causing a backpressure that restricts the blower. On a supercharger it's tied to the engine so the backpressure isn't as much as a factor as it is with a free spinning turbo turbine. So ya, only people with boost levels on a turbo that are up at the point where backpressure is limiting the flow of their turbo would notice a good increase in hp gain from a cutout.
People with superchargers and low boost are putting too much stock into a cutout.
People with superchargers and low boost are putting too much stock into a cutout.
No wideband was hooked up because I have a wideband in my car so ignore it.
I checked for leaks once ( I made a topic about it I think ) and found my BPV to be leaking but I fixed it and had no more leaks.
Phunk is correct that a larger, better flowing intercooler core would cause less pressure drop and thus would contribute to more boost.
As for the cutout, the curves were identical except for the last 500rpm where I lost 5whp with the cutout closed. Not worth the ear chattering noise imo.
I checked for leaks once ( I made a topic about it I think ) and found my BPV to be leaking but I fixed it and had no more leaks.
Phunk is correct that a larger, better flowing intercooler core would cause less pressure drop and thus would contribute to more boost.
As for the cutout, the curves were identical except for the last 500rpm where I lost 5whp with the cutout closed. Not worth the ear chattering noise imo.
wtf? so the upper limit of a stock block is too much power out of a bolt on supercharger? No other supercharger will come close to producing the power of the vortech.
Hey, you never know....lol.
What did you expect? I put about $5.5K into the whole thing, some parts were used so I saved a few bucks.
Tell me about it, I'm glad I didn't go with the HKS system. The Vortech has treated me well and I would have shot myself trying to get this kind of power from the HKS setup.
I expected the cutout to help me out in the upper range for the same reason you expressed, but I honestly expected more out of it considering the ridiculously loud exhaust note vs. the near stock like exhaust note with it closed.
What did you expect? I put about $5.5K into the whole thing, some parts were used so I saved a few bucks.
ya, it'll only help on top when there is the most backpressure. Even then there isn't much effect of backpressure on a supercharger since it's belt driven.
wtf? so the upper limit of a stock block is too much power out of a bolt on supercharger? No other supercharger will come close to producing the power of the vortech.
wtf? so the upper limit of a stock block is too much power out of a bolt on supercharger? No other supercharger will come close to producing the power of the vortech.
I expected the cutout to help me out in the upper range for the same reason you expressed, but I honestly expected more out of it considering the ridiculously loud exhaust note vs. the near stock like exhaust note with it closed.
Grats dude! ... you're finally there.. 
edit: and +1 with the rest being it a leak rather than just a better flow.. cuz that shouldn't change the boost level.
glad it worked out well for u.
edit: and +1 with the rest being it a leak rather than just a better flow.. cuz that shouldn't change the boost level.
glad it worked out well for u.
Last edited by maXmood; Jul 29, 2010 at 01:30 AM.
Thanks BTW.
umm, why does everyone not think intercoolers will change boost level? It will change it tremendously. A very restrictive intercooler will decrease the amount of boost getting to the intake. That's why they have a pressure drop rating on them. If it didn't matter then manufacturers wouldn't have to measure the pressure drop across the intercooler and provide that to the consumer.
Some factory intercoolers (3000gt, stealth tt) have almost a 5psi drop across their very small intercoolers. Huge increases in boost and power can be made by aftermarket intercoolers on those cars. I know because one of my closest car buddies proved it to me with his stealth TT now running 19psi.
Some factory intercoolers (3000gt, stealth tt) have almost a 5psi drop across their very small intercoolers. Huge increases in boost and power can be made by aftermarket intercoolers on those cars. I know because one of my closest car buddies proved it to me with his stealth TT now running 19psi.
Ok.. now this IC is on my list.. should i go for it, or should i look into something bigger?
i do need something that is less restrictive, but it should function as much as an interncooler rather than just a plain aluminum box.
temps here reaches +120F in summer, and humidity isn't any better. because we're an island surrounded by sea.
i do need something that is less restrictive, but it should function as much as an interncooler rather than just a plain aluminum box.
temps here reaches +120F in summer, and humidity isn't any better. because we're an island surrounded by sea.
