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What turbo for most low-end torque possible???

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Old Jun 29, 2007 | 08:33 AM
  #61  
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Originally Posted by chuntington101
couldn't agree more. 2.0ltr with forged internals running about 10.0-1 with the stock turbo. if you can afford it get a bb core put in it. also you will want to have some nice HIGH LIFT rally style cams and some pullies so you can get the timing just right! if you want even faster responce then it s time for some anti-lag!

this is a treied and tested route. but it can get as exspensive as going for bigger power.

also have you thought about weight reduction??? will help make the car faster on and off boost and help with the handling and stopping to!

chris.

Thanks chris, I'm surprised they wouldn't be running a 2.3L stroked, unless of course, it was against regulations


So where are all these high-lift rally cams in the US?
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Old Jun 29, 2007 | 08:36 AM
  #62  
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Originally Posted by mudduck
Soon2B, I realize that the Evo is not likely to have any serious torque under 3000rpm. I'm fine with that. I simply love the feeling of going WOT in a lower rpm and transitioning from off-boost to peak boost spike. After the boost spike, the rest of the pull in a given gear is somewhat of a let-down for me. (Maybe that's because I've never experienced a 35r before ) I want the torque curve on my dyno graph to shoot as vertically as possible up to 450wtq at around 3000-3500rpm in 3rd.


It's just personal preference, that's all. There's plenty of people on the Corvette boards and Cobra boards that cannot figure out why the hell we would choose to purchase and mod a 2L 4-banger with AWD to street or drag race. But there's something fun about doing the unexpected!


Personally, I'd rather have a car that hits harder in the low end than the top-end. It doesn't have to spool at 2000prm either. I just want that effortless feeling of leaving another car behind without having to wind the hell out of my engine. The Evo may not be made to ever have monster torque down low like a V-8, but it can do one thing better than a lot of the Cobras and Vipers out on the street - put the torque down to the ground without losing grip.
I see what youre saying. Believe me, I am a big fan of quick spool, great response and high initial torque. Ive beaten more big turbo cars than Ive lost to and plenty of them we well setup. I think maxxing out a smaller turbo to its potential is better than running a bigger one in the middle.

I also think the stock turbo does what youre asking, I just dont see why you have your heart set on "xx rpm spool". I know you said it doesnt have to be 2000RPM, but I mean, the stock turbo spools FAST.

The cheapest thing I think you could do is put on a TME turbo and get some cam gears the set them to maximize spool. Of course, you will lose top end. That should not cost you an arm/leg.

To the Corvette/Mustang guys and buying a turbo 4-cylinder for drag racing - well, I dont see there being too big of a disadvantage to drag racing these cars until serious power is being made. Hell, IX's are going 11s with $800-1500 in mods. All on street tires, pump gas, some bolt-ons. That is great. When youre deep in the 10s, being able to throw on slicks out back and run a 150 shot really is nice and not an option for us, however, thats more the extreme end of drag racing. I like the EVO because it does everything well. A Cobra does not. A Z06 can, but they are 2x the price!
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Old Jun 29, 2007 | 08:47 AM
  #63  
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yeah, I've been keeping my eyes on those C6 Z06's since they came out. Just waiting for them to depreciate a bit more...


But then I remind myself that a well-setup bolt-on Green turbo on meth could theoretically (ahem, Soon2B/ElectricEvo ) hang door-to-door with a stock C6 Z06 on the parkway - ooops! - for much less $$$...
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Old Jun 29, 2007 | 09:09 AM
  #64  
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From: Toms River, NJ
Originally Posted by mudduck
yeah, I've been keeping my eyes on those C6 Z06's since they came out. Just waiting for them to depreciate a bit more...


But then I remind myself that a well-setup bolt-on Green turbo on meth could theoretically (ahem, Soon2B/ElectricEvo ) hang door-to-door with a stock C6 Z06 on the parkway - ooops! - for much less $$$...

That was the best thing my car has ever done.

I actually talked to the guy in the Z the next weekend. He was blown away when I told him how much money I had in the car. He thought at least 10k. I was like, try half of that! He was very cool guy though, he didnt know much about EVOs - now he does!
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Old Jun 29, 2007 | 09:38 AM
  #65  
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Mudduck, if you´re gonna build and tune for gonzo lower-midrange torque there is an additional wear and tear factor to consider. You´ll first need to upgrade your Evo´s drivetrain(TC, tranny, clutch, HD axles, etc., because big torque shreds the drivetrain bits, for sure.

Last edited by sparky; Jun 29, 2007 at 09:40 AM.
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Old Jun 29, 2007 | 11:51 AM
  #66  
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TME with the 9.8 housing off of an regular EVO8. Fastest spool...
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Old Jun 30, 2007 | 06:49 AM
  #67  
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Originally Posted by mudduck
Thanks chris, I'm surprised they wouldn't be running a 2.3L stroked, unless of course, it was against regulations


So where are all these high-lift rally cams in the US?
yes mate its regs that stop them going bigger. not sure if the stock turbo and strokers are the best answer. yes you want fast spool, but you also want some powerband!! from what i have seen on 2.3's with stock turbo they look more like diesel graphs.

here is pipers website. they have prvoed themselves overhere to work really well. not sure why people dont go for higher lift jobbies. the piper ones go to 12.00 mm!!!! think you need head work for that lift though!

also its really worth noting that cam specs can be so funny. you really want a cam that opens and closes the valves as fast as you can. this will give you the best flow numbers! duration is not good on a boosted motor. you want to keep it down, otherwise you will just be bleeding off the boost out the exhaust valves!

that also why timimg of the cams is important! you want them so there is no chance of lossing boost. this just reduces the dymanic compresion ratio letting you run more boost, but not make more power!

sorry back to turbos!

Chris.

ps here is pipers site for the Evo.

http://www.pipercams.co.uk/NewPiperW...CamFrames.html
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Old Jun 30, 2007 | 10:14 PM
  #68  
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From: Auckland, New Zealand
Originally Posted by EVOeight
TME with the 9.8 housing off of an regular EVO8. Fastest spool...
Try a TME GSR turbo (15G) with an evo4 exhaust housing (9T), that would be the fastest spooling turbo.
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