Worcester/Boston Social Thread
Tim, I hear ya man, I'm way tooo impulsive some times...I just came back from vaca and told myself I wouldnt buy anything for myself or the car til after xmas....and that lasted.....about 2 weeks, lol. I just keep finding these great deals...gets me every time! The image I sent to you....yea....it has more stuff now, lol. I'll send it to you when i get home...
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Joined: Aug 2007
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From: old testament god of the squirrels
anja - i think the smc with zt-2 is the most popular choice. i know TTP swears by the ZT-2's failsafes. the ZT-2 is a great wideband, with a ton of features for cheap... but for some reason i'm still leaning towards the LC-1, and sticking to pump.
mikie - i was reading up on the Green and the different housing sizes, and they only recommend the smaller housings if your running 20-22psi. not sure if they mean 22 spike or 22 redline.
mikie - i was reading up on the Green and the different housing sizes, and they only recommend the smaller housings if your running 20-22psi. not sure if they mean 22 spike or 22 redline.
http://store.forcedperformance.net/m...e=Lancer-Turbo
it seems like they this the 9.8 is a good compromise. the response on the smaller housings seem to outweigh the loss of power up top. remember, your turbo is a few inches off the ports- the exhaust gasses are still hot so they are pretty dense and don't require a larger housing. on a subaru, you lose quite a bit of heat andd the exhaust gasses expand before hitting the turbo, so you actually get better performance with a larger housing. it's necessary. of course, the evo is far more volumetrically efficient, so that would beg for a larger housing as well.
according to FP, the boost recovery (and thus response) is substantially better with the smaller housings with a 5% loss of flow up to. unless you are building a track car, the improved peformance and response on the street is probably worth the horsepower you are giving up (at least in my opinion). on top of this, you are going to be octane limited on pump gas, so that 5% loss of flow doesn't necessarily translate to a 5% loss of power since you might be at the edge of what you can reasonably do on pump gas.
the turbine wheel you use also factors into play as well. when you clip the exhaust wheel, you won't need a bigger housing since you will up the flow. you really need to take all of the turbo components and look at the system as a whole. it's kind of like saying X turbo can't be run above Y psi. that's true for a given system (octane of gas, intercooler, etc, etc). the efficiency of the overall system dictates what you can or can't do.
bigger ain't always better.
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From: old testament god of the squirrels
Well once I catch back up on the "play money" fund....you guys can help me with tuning my car. The only 2 things I have left to purchase is a HFC to replace my 1piece DP w/cat delete, and WORKS 269 cams. I will need your guys wisdom to get everything out of my 6.5 TME 16G.
Are you guys willing to help me out with this????
Are you guys willing to help me out with this????
well santa didnt bring anything yet...but there's a whole lot on the list, I myself however just purchased a small goodie from the west coast that will be here probably in the next week and a half or so....you'll see soon young grasshopper..and the exhaust....I think the ship sank coming across from japan or something.......freaking pirates...
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From: old testament god of the squirrels
car manufacturers do things for two reasons- cost and emissions. increased HP is usually a side-effect of improved efficiency needed to hit emission standards which grow increasingly more and more stringent. variable valve timing is a great example of such a thing.
the one thing that fp didn't say was whether these tests were on a car with VVT or not. it is possible with VVT that you can make better power with the reduced backpressure. on a non-VVT car, you might be limited by the cams so the housing doesn't help. again- without doing a bunch of tests, all i can do is speculate and go by published information.
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Joined: Aug 2007
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From: old testament god of the squirrels
Well once I catch back up on the "play money" fund....you guys can help me with tuning my car. The only 2 things I have left to purchase is a HFC to replace my 1piece DP w/cat delete, and WORKS 269 cams. I will need your guys wisdom to get everything out of my 6.5 TME 16G.
Are you guys willing to help me out with this????
Are you guys willing to help me out with this????
i'll try to help as much as i can. cams are interesting because you have to retune a lot of the timing map, if not all of it. they change the amount of vacuum you pull at idle as well as everywhere else.
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Joined: Feb 2006
Posts: 1,345
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From: MA
here is what i was referring to the other night:
http://store.forcedperformance.net/m...e=Lancer-Turbo
it seems like they this the 9.8 is a good compromise. the response on the smaller housings seem to outweigh the loss of power up top. remember, your turbo is a few inches off the ports- the exhaust gasses are still hot so they are pretty dense and don't require a larger housing. on a subaru, you lose quite a bit of heat andd the exhaust gasses expand before hitting the turbo, so you actually get better performance with a larger housing. it's necessary. of course, the evo is far more volumetrically efficient, so that would beg for a larger housing as well.
according to FP, the boost recovery (and thus response) is substantially better with the smaller housings with a 5% loss of flow up to. unless you are building a track car, the improved peformance and response on the street is probably worth the horsepower you are giving up (at least in my opinion). on top of this, you are going to be octane limited on pump gas, so that 5% loss of flow doesn't necessarily translate to a 5% loss of power since you might be at the edge of what you can reasonably do on pump gas. realistically the differences from one housing to the next is so small its not even worth debating.
the turbine wheel you use also factors into play as well. when you clip the exhaust wheel, you won't need a bigger housing since you will up the flow. you really need to take all of the turbo components and look at the system as a whole. it's kind of like saying X turbo can't be run above Y psi. that's true for a given system (octane of gas, intercooler, etc, etc). the efficiency of the overall system dictates what you can or can't do.
bigger ain't always better.
http://store.forcedperformance.net/m...e=Lancer-Turbo
it seems like they this the 9.8 is a good compromise. the response on the smaller housings seem to outweigh the loss of power up top. remember, your turbo is a few inches off the ports- the exhaust gasses are still hot so they are pretty dense and don't require a larger housing. on a subaru, you lose quite a bit of heat andd the exhaust gasses expand before hitting the turbo, so you actually get better performance with a larger housing. it's necessary. of course, the evo is far more volumetrically efficient, so that would beg for a larger housing as well.
according to FP, the boost recovery (and thus response) is substantially better with the smaller housings with a 5% loss of flow up to. unless you are building a track car, the improved peformance and response on the street is probably worth the horsepower you are giving up (at least in my opinion). on top of this, you are going to be octane limited on pump gas, so that 5% loss of flow doesn't necessarily translate to a 5% loss of power since you might be at the edge of what you can reasonably do on pump gas. realistically the differences from one housing to the next is so small its not even worth debating.
the turbine wheel you use also factors into play as well. when you clip the exhaust wheel, you won't need a bigger housing since you will up the flow. you really need to take all of the turbo components and look at the system as a whole. it's kind of like saying X turbo can't be run above Y psi. that's true for a given system (octane of gas, intercooler, etc, etc). the efficiency of the overall system dictates what you can or can't do.
bigger ain't always better.
Last edited by EvoBroMA; Dec 7, 2007 at 02:01 PM.
Well, dex mentioned that I get a base flash (jestr/mellon) and then go from there with adjusting the maps. Buy a cable...start datalogging....I'm an idiot/noob at this point when it comes to the ECU thing. I have been meaning to start researching it, but my schedule hasn;t allowed me to so yet. I know there are many who say a true tune is a road tune, and those that say dyno's tuning FTW!! I just want a good tune to support my mods. And want it done right. The best all around tune I can get for daily use. Its not a race car to me. I know that the more I read into it, the more it will all make sense. But from the sounds of it, a few of you here have a great understanding of it. I can't wait till I can make some of these meets come spring time.
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From: old testament god of the squirrels
they say that you get a gain of .1 to .2 seconds of shift recovery, as in the time it takes to get back to full boost on a shift. which translates to much less than .1 seconds per shift at the track. so is it worth a 5% loss in flow - to gain barely anything per shift - then if you flat foot shift, shift recovery is even more negligible. the 5% loss up top is not worth it to me, considering i would want the ability to run a good amount more than 22psi, on race gas if need be. realistically the performance difference between housings is so small its not even worth debating.
only one way to find out- try it
on an VIII, i would probably stick with the 9.8 even with race gas, though.