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Old Apr 8, 2010 | 10:33 PM
  #81  
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Originally Posted by teej281
^Not necessarily. The 70mm turbo would be perfect for street funness, as long as it doesnt have a huge A/R, if i understand it right. Turbos come in all different sizes because of the different power needs that people are gonna use them for.

To Aereon: The twin 50mm turbos wont be linear, but they will be closer to linear than a single 70mm i'd say from what ive been reading lately. The actual linearness of the graph will all depend on how quickly the turbo(s) spool. If it spools hard later in the rpm band youre going to have a more non-linear power curve. If the turbo(s) spool sooner in the rpm band, you'll get a more linear curve because you wont see the spool on the graph because they will instantly spool. If that makes sense...
That's pretty much what I was thinking as far as the diff between a single and a twin in terms of feel behind the wheel.
Old Apr 8, 2010 | 10:36 PM
  #82  
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your right, at least from what ive knowing from the past even. Like i said not that it cant be done with turbos, but that very few people do the math well enough to be honest with what they really want. Everyone wants the high numbers, but if your not set up to take advantage of that like the mustang i raced...it dont do you **** for good. He ran 12.8s with 600plus rwhp. assuming he was telling the truth, and since it was a shop, i dont see why hed lie...
Old Apr 8, 2010 | 11:13 PM
  #83  
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Well if its a shop that said their car made 600rwhp and only ran those times, i'd drive home right after that with their tails between their legs and close the shop. Now a built 2v with a properly sized single turbo is capable of those numbers and great streetablility but it has to be researched and properly set up to work well to make power numbers and good streetability.
Old Apr 8, 2010 | 11:30 PM
  #84  
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exactally my point! any way they had a few problems wrong with thier set up, but im not a performance shop guy for a living so i really didnt give them too much input, i doubt they would have liked it anyway. But they where running a p-51 intake, im thinking blower cams, but i could be wrong, and a 76mm turbo, with 3.55s and a stock tranny. To correct the blower thing, they were running a blower set up previous, with nitrous running 10s, they swapped to a turbo, but not sure about the cams. They hadnt added the nitrous yet, they were just testing the turbo system out. But what i saw was they were running a p-51 shifting at like 6k maybe 6500, not for sure, and running a stock transmission with 3.55s Basically they had the wrong intake for the rpm, they had huge drop between gears with 3.55s and the tranny, meaning they likely fell below 4k rpm every time they shifted coupled with the turbo that probebly didnt start to spool till like 4k. so yea...just my opinion lol.
Old Apr 8, 2010 | 11:35 PM
  #85  
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well stock tranny is a no-no in the first place with that kinda power. Blower cams are not ideal for turbos i'd say. Probably better than n/a cams, but still not ideal. The intake is not a good choice. Something like a trickflow intake manifold would have worked better for the setup. They went from running a blower to running a turbo...two different beasts requiring different setups. They shouldnt swap a power adder without changing things such as cams and stuff like that.
Old Apr 8, 2010 | 11:47 PM
  #86  
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I should retitle the thread, aereon's turbo chat thread=P

Just wondering if money was not an issue, would you guys go TT with 2 smaller turbos for my setup? I am asking because the car gets tons of miles thrown on it and will most likely see quite a bit of stop and go driving. Would having 2 smaller turbo's spinning at lower psi be better than 1 larger turbo spinning at a higher psi (assuming everything is matched accordingly) in terms of driveability, reliability, and heat? Also if I do go with a turbo I will be adding a turbo timer, how would this work with a manual that see's a lot of hills. (I live/work in a hilly area and the car gets parked regularly on inclines so parking it in gear is preferred)
Old Apr 9, 2010 | 12:04 AM
  #87  
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well, if money wasnt an issue id go with the helion twin turbo or the hp twin turbo, mainly because just like you i just like the sound of it. plus as jermy clarckson would put it "look at my turbos" as far as nbeeding it and it being better dont know for sure. But i dont see why it wouldnt work since they are designed as such, daily driving and what not. and as far as the same psi vs HP, im not entirly sure, but psi is psi, so 8psi on a twin is the same as 8 psi on a single, the curve will just likly look different. Psi is a reading pretty much telling you what is not making it into the motor, as weird as that sounds. And a turbo timer is on there just to make sure you car cools down so you dont leave a hot turbo with sitting oil, cuz it will fry the turbo and the oil. But you hyave to leave it in neutral, so turn your wheels to the curb and hope your ebrake doesnt give lol
Old Apr 9, 2010 | 12:09 AM
  #88  
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Yea, psi is psi, dont matter if its coming from a single or twins. However, from current understanding two smaller turbos would suite you best. Turbo timer only keeps your car running after you shut the key off to cool the turbo. My suggestion is to not even bother with the turbo timer if you want to park it in gear just because you cant park a car in gear with that setup. Two small twins should work out very well for you.
Old Apr 9, 2010 | 12:14 AM
  #89  
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Originally Posted by teej281
Yea, psi is psi, dont matter if its coming from a single or twins. However, from current understanding two smaller turbos would suite you best. Turbo timer only keeps your car running after you shut the key off to cool the turbo. My suggestion is to not even bother with the turbo timer if you want to park it in gear just because you cant park a car in gear with that setup. Two small twins should work out very well for you.
Yes, psi is psi, my question resides in how it is generated. Would 8 psi from a TT setup be from 4 psi per bank or both sides generating 8? It would only make sense that they are both generating 4 but just wanna clarify. If they both generate 4 psi a piece would the turbo's run as hot as a large turbo dumping 8 psi?

The turbo timer is more of a fear of sludging that I hear with older turbo's would this be an issue without it? I typically make short trips less than 3-5 miles from home to school, then school to work, then work to school, so they won't really be getting too hot but also won't be getting a whole lot of cool time.
Old Apr 9, 2010 | 12:16 AM
  #90  
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teej is right, turbo timers are great if your in a hurry and you just pounded on the car, otherswise they are a waste. Basically you run the **** out of the car heat the crap out of the turbos, then when you park just sit in the car for 2 or 3 mins. let everything come back to normal temps (not engine temp likly you wont acctually see that it heated everything up) and then shut the car off. thats alla turbo timer does anyway. it sees 170 degree oil or water (no idea where it gets the temp) and if its above it it wont shut off till it drops. TWINS FOR THE WIN!



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