Quote:
* Prevent air in the intake from flowing backwards through either turbo
Hadn't thought of that. 
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| Author: | DionR [ Fri Jun 02, 2006 11:55 am ] |
| Post subject: | |
Quote: * Prevent air in the intake from flowing backwards through either turbo
Hadn't thought of that.
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| Author: | D150 [ Sat Jun 03, 2006 7:26 pm ] |
| Post subject: | Hey, a newbie here |
I am still new to turbos but, My slant six starts to boost @ 1400 RPM ...6PSI by 2300 RPM... and will hit 10 PSI @ 3000 and run it till red line somewere around 5900 RPM. (only have a 10 PSI gauge) The Turbo is from a Mitsubishi Starion'89 2.6L 4cyl.... Its a TD05 12A 8 . Not much comprimize if ya ask me, just BOOST. |
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| Author: | D150 [ Sat Jun 03, 2006 7:29 pm ] |
| Post subject: | turbo /6 |
Still tuning to handle over 9PSI ...things start to get a little wild. |
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| Author: | panic [ Mon Jun 05, 2006 4:33 pm ] |
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"a blower drags the motor down all the time" Which is why all the modern Eatons have a vacuum bypass for part throttle operation - almosy nothing goes through the compressor so pumping load is very low. |
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| Author: | panic [ Mon Jun 05, 2006 4:37 pm ] |
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My slant six starts to boost @ 1400 RPM ...6PSI by 2300 RPM The compromise is that the compressor won't flow all the motor will take at high boost, the turbine will run hot all the time, the discharge temperature will be higher than with a bigger turbo, the pumping loss is very high, and the exhaust backpressure may reach 3 psi for every pound of boost. Just using a larger A/R turbine housing may increase your power quite a bit, but it will delay boost. |
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| Author: | D150 [ Tue Jun 06, 2006 9:35 am ] |
| Post subject: | turbo /6 |
From what I've seen and heard I used a smaller turbo than most said would even work. I sized it through a little bit a research and math. It has to do with the amount of air that a turbo can move. Bigger is not always better! |
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| Author: | Sam Powell [ Tue Jun 06, 2006 11:11 am ] |
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My turbo is from an innercooled Buick Grand National, just as Bob D suggested in his article on this subject. This turbo seems to be ideal for the slant. Boost somes on seemlessly aroung 1600RPM, and builds quickly to 9 lbs. It will turn up to 5900rpm at this point. It all happens so fast that I haven't really taken the time to map out the boost curve. Boost comes on so readily, that sometimes in high gear you find yourself in boost going up a hill when you didn;t even know it was coming. Of course you can hear it spooling up, and I have to say, I really like that sound better than "boom". I recently sold two cars that went "boom", and kept the one that went "whr"r. A turbo engine is a blast to drive. You feel like some crazy devil has gotten ahold of the engine and is running away with it. |
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| Author: | D150 [ Tue Jun 06, 2006 9:48 pm ] |
| Post subject: | turbo /6 |
I haven't put a pressure gauge on the exhaust side, but if I do I let ya know what it reads @ boost. |
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| Author: | D150 [ Sun Jun 11, 2006 7:13 pm ] |
| Post subject: | pic turbo |
Ok got some pis of my turbo slant set-up (off the truck)  the gauge was just a test fit, I installed a brass tee.  The carb height is not ideal, it hits the hood, time for a scoop! 
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| Author: | Joshie225 [ Sun Jun 11, 2006 8:12 pm ] |
| Post subject: | |
I'm a bit concerned about your turbo's compressor seal. As a former Conquest owner I know that Mitsubishi put the throttle after the compressor. This means, of course, that the compressor was never under vacuum. Turbo I 2.2s used a thottle upstream of the compressor so those little T3s will take vacuum. I own a vehicle with a 16G on a 2.0 liter engine stock. I can't imagine running a 12G on a 3.7L. |
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| Author: | emsvitil [ Sun Jun 11, 2006 8:14 pm ] |
| Post subject: | Re: pic turbo |
Quote: Ok got some pis of my turbo slant set-up (off the truck)
the gauge was just a test fit, I installed a brass tee. The carb height is not ideal, it hits the hood, time for a scoop! What about side-draft carbs???? |
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| Author: | Thropar [ Sun Jun 11, 2006 8:19 pm ] |
| Post subject: | turbo |
Nice pics of a home built system. What kind of specs on the motor? I am guessing minimal flow work (head/cam) for that turbo to work. ...and Sam, great description of your turbo driving experiences, makes me want one |
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| Author: | Joshie225 [ Sun Jun 11, 2006 9:34 pm ] |
| Post subject: | |
I would like to build a turbo 170 myself. The local road racing sanctioning body has a 40% factor for forced induction in the SUper Production class. The normally aspirated class breaks for Super Production are under 2 liters (SPU) and over 4 liters (SPO). A turbo 2.8 (the 170) factors to 3.92 liters so it fit perfectly at the top of the middle class SPM. I just worry about the oiling and cooling of the engine. |
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| Author: | Matadem [ Mon Jun 12, 2006 4:38 pm ] |
| Post subject: | Re: pic turbo |
Quote: Ok got some pis of my turbo slant set-up (off the truck)
the gauge was just a test fit, I installed a brass tee. The carb height is not ideal, it hits the hood, time for a scoop! 
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| Author: | D150 [ Tue Jun 13, 2006 8:50 am ] |
| Post subject: | Re: turbo |
Quote: Nice pics of a home built system. What kind of specs on the motor? I am guessing minimal flow work (head/cam) for that turbo to work.
...and Sam, great description of your turbo driving experiences, makes me want one Well the 225 has been bored 40 over, has a Lunati Racing Cam (specs? .440 lift ). The rebuild was 10,000 Miles ago. |
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