07-17-2009, 09:43 AM
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Registered User
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Join Date: Jun 2003
Location: Granolaville, Washington
Posts: 3,551
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 Quote:
Originally Posted by Duk
Garrett BB turbo's are my preferred choice  . If you could get the full potential out of a pair of GT2871r's, youd be pumping over 400RWKW. Unless you have a need for more KW, there is no need for turbo's bigger than that. |
So, even if the turbos are too large for the 3.0, of if the boost has to be reduced for now, or there is a bunch of lag, or the maximum power potential on the 10.0:1 3.0 can not be extracted for now, we want the rest of the setup to be 3.45 litre/9.5:1-ready! Make sense?
Besides - like I mentioned - on just .5 to .6 BAR boost on a stock standard 10.0:1 compression TT 3.0 litre 24v, we have already seen power WELL-beyond that of my and Jes' full-race 3.7 litre 12.0:1 motors that have well over 400 horses at the crank!
Once the setup is validated on a project here and we go to a built 9.5:1 3.45 litre motor and crank it up to 1 BAR, we should see around 850-900 Nm torque at the wheels and around 520-plus Kw and that is what we are trying to prepare for.
Quote:
Originally Posted by Duk
Having said that, your intended quite high static compression ratio has me wondering what sort of fuel be using and the cars intended purpose......  If it is planned to be a track car running any of the 'heavey' high octane race fuel or (better still  ) methanol, then possibly a move to the Garrett GT30 range would be better interms of turbo durabillity. |
Well, it is not our intended or planned high static compression choice, as much as it is simply the default CR for a standard 24v core. We'll bring it down later with a 3.45 litre build, but we are trying to avoid spending money on building a 3.0 and simply utilize a stock used 3.0 core for now. Also, water-injection and methanol-setups are not required for this configuration - nor is race fuel.
You can achieve similar safety-margins by a) keeping the boost low, b) providing adequate air-charge cooling and engine cooling, c) with accurate fueling from your engine management system and with d) safe and conservative timing maps in your EMS as well...
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Full-Race 3.7 Litre 24v Milano; Street/Track 3.0 Litre 24v Milano Verde; 6-speed 3.45 litre 24v Street 164 LS/Super; Future 24v Projects; '06 Scion XB - Runs!
Last edited by junglejustice; 07-17-2009 at 10:03 AM.
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