Thinking of going from SC to Turbo, little tech help...
#21
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What kind of rwhp/rwtq could one expect running 12psi of boost from the 2860 with the .64 a/r housing, stock and/or modified 1.8s?
My other issue would be price consideration. My TDR IC would work with the FMII kit, with the compressor reclocked. If I were to look at different manifold options, I'd still need a manifold that puts the compressor outlet just about where the FMII outlet is located. So basically, do the BEGI and FM manifolds put the turbo in the same location? BEGI quotes individual part prices on their site, FM doesn't so I'd have to call them for the prices.
My other issue would be price consideration. My TDR IC would work with the FMII kit, with the compressor reclocked. If I were to look at different manifold options, I'd still need a manifold that puts the compressor outlet just about where the FMII outlet is located. So basically, do the BEGI and FM manifolds put the turbo in the same location? BEGI quotes individual part prices on their site, FM doesn't so I'd have to call them for the prices.
#22
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I wish I had numbers for my GT2554R for you, but I think it's around 230whp at 15psi. The boost response is amazing, boost onset under 2000rpm and full boost by 3000, mabye a hair more. If you want 300rwhp, it's obviously not going to cut it, but if you're happy with 250whp or so, a little water injection and a GT25R, MABYE a 2860R, is the ticket.
Having said that, if I had $1500 right now and a built motor in the works, I would probably be ordering up a GT2871R right now. If you're going to go bigger than a 2860R, I would get a Bell manifold with a Tial EWG.
Having said that, if I had $1500 right now and a built motor in the works, I would probably be ordering up a GT2871R right now. If you're going to go bigger than a 2860R, I would get a Bell manifold with a Tial EWG.
#24
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It's got the spool of the .64 A/R turbine wheel from the disco potato, but you aren't dealing with the big trim turbines that you get from a 3071. Basically, it flows like a 3071 and spools like a potato.
I think. :gay:
I think. :gay:
#26
Driving around town. That's where you'll find yourself at low revs, certainly not at the track.
I know the prevailing argument there is, "well, when I'm driving around town, I never let the RPM drop below 4500! low-revs are for pussies!"
However, not everyone likes to go screamin' around town, calling attention to themselves from stop-sign-to-stop-sign. For this kind of "tooling around town/normal driving," the supercharger or the teensy turbo is going to give the best results.
I know the prevailing argument there is, "well, when I'm driving around town, I never let the RPM drop below 4500! low-revs are for pussies!"
However, not everyone likes to go screamin' around town, calling attention to themselves from stop-sign-to-stop-sign. For this kind of "tooling around town/normal driving," the supercharger or the teensy turbo is going to give the best results.
DD Driving = Quiet no-hp-needed non-boost. You still have engine grunt, just not turbo grunt. Unless you modify your car for low-compression heads or something, its still stock power. Having a tiny turbo is gunna be more noisy driving around town than a big turbo, with all that BOV stuff.
Low end grunt is for beating people from stoplights(or chrismas tree lights?) which I actually didnt see in the OP's First Post.
#29
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Decided on a 2871R. Garrett seems to have 3 variants. Yo no comprendo "trim", but I do understand the lower turbine a/r means quicker boost response. I am looking for something that isn't on/off since I open track the car, and with reasonable boost response. I also figure what the heck, shoot for a solid uncorrected 300-350rwhp if I want to, I can always install a 6-speed (I already have the 3.63 gears). The engine can handle a fair amount of boost reliably, and I want good thermal efficiency for track use, willing to trade off some street boost response for no worries with heating things up while on track for 30 minutes. It will be externally wastegated as well. Don't think I'd be running a huge amount of power while on track, though. Gotta tighten the nut behind the wheel first. Thanks again for the help.
#31
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I did some farting around on the Squirrel Performance site.
Picked the 3 2871R variants and these are the resulting maps:
http://www.squirrelpf.com/turbocalc/...&product_id=33
http://www.squirrelpf.com/turbocalc/...&product_id=34
http://www.squirrelpf.com/turbocalc/...&product_id=35
Which one would suit me? The intial specs were close I think other than what may be the min boost rpm, dunno what's reasonable. Otherwise, the engine should be pretty efficient being fully built, so I made the BSFC .47 instead of the default .43. My rev limiter in the Hydra is set to 7500 right now, really don't want to go higher than that.
I'm running RC 550s with the Hydra btw, so I think they max limit the rwhp to around 300. I could always increase base pressure a bit as the rest of the fuel system is squared away.
Picked the 3 2871R variants and these are the resulting maps:
http://www.squirrelpf.com/turbocalc/...&product_id=33
http://www.squirrelpf.com/turbocalc/...&product_id=34
http://www.squirrelpf.com/turbocalc/...&product_id=35
Which one would suit me? The intial specs were close I think other than what may be the min boost rpm, dunno what's reasonable. Otherwise, the engine should be pretty efficient being fully built, so I made the BSFC .47 instead of the default .43. My rev limiter in the Hydra is set to 7500 right now, really don't want to go higher than that.
I'm running RC 550s with the Hydra btw, so I think they max limit the rwhp to around 300. I could always increase base pressure a bit as the rest of the fuel system is squared away.
#32
First fix your VE those numbers are pretty damn low. Then are those the temps you are getting out of you mp62 now? If so they are pretty damn high. At that power level i think .5 or so is about as low as your bsfc is going to get. I think mine at peak was .45 or so and Ben's worked out to be around .47 or so. But both of these where at lower boost level guestimations. From the look of those charts the 1,3 are the best at 16 psi but the 3 is awfull close to the surge line as you get to full boost this could cause a problem with low boost response. Vs # 1 wich ends up smack dab in the middle of the high effeciency island but yeah change up those enviroment numbers abit and see how they look.
#34
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After screwing around with the ve and intake temps, it seems that variant 1 is still the better option, the GT2871R, 71mm, 52 trim, .60 A/R. The 48 trim seems to go off to the right of the map a fair amount, and the 56 trim still rides perilously close to the left side of the map.
While on track with the MP62, at 10psi, I saw a max of 41ēC for intake air temps.
While on track with the MP62, at 10psi, I saw a max of 41ēC for intake air temps.
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