About to get BLOWN!!!!!
#31
11-25-2007, 07:23 PM
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Originally Posted by justjames80
My truck sees 13.8 - 14.4 psi in cool weather and a good belt. 15 psi wouldn't be much of an issue and has been done on these trucks. Also note I didn't say the materials were not a factor...just not as much an issue as the "12psi-will-blow-the-engine-up" crowd seems to think. I'm sure you could put 18 psi through a 5.4L with a cetrifugal, water/methanol injection, and a rock-solid tune...probably won't make too many passes at the track with it though.
#32
11-25-2007, 07:28 PM
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Harder to control but not impossible. Just means less room for error. That's why carefull attention to intercooling and water/meth injection would be essential. Using lower compression pistons in order to increase boost pressure is starting to become an outdated way of solving the detonation issue. OEM's are pushing 10:1 CR or better with turbochargers on gasoline, that would have been almost unheard of unless it was a strict racing engine 10 years ago.
#33
11-25-2007, 07:30 PM
Detonation will cause premature ignition which can cause havoc on rods, pistons, crank shafts, etc. It also increases the motors EGT's which also compound to cause failure.
But even with the worlds best tune, you can still pop a motor that wasnt designed for boost, with too much pressure. Motors that were intended for boost can take a beating even without a perfect tune, but NA motors will usually show you their weak link fairly quickly.
Cast internals can also be a big weak point.
I tuned a 2.4L 4cyl DOHC motor to just over 450FWHP (28psi), but the motor was made to handle boost and had forged internals and good flow. Anything less and I would have never met that number.
My initial thought when talking about boosting this motor, is stay conservative unless you feel like building. You can boost a motor decently and get away with it for a while, but it will catch up to you.
Does anyone have a breaking down for th 3V?
But even with the worlds best tune, you can still pop a motor that wasnt designed for boost, with too much pressure. Motors that were intended for boost can take a beating even without a perfect tune, but NA motors will usually show you their weak link fairly quickly.
Cast internals can also be a big weak point.
I tuned a 2.4L 4cyl DOHC motor to just over 450FWHP (28psi), but the motor was made to handle boost and had forged internals and good flow. Anything less and I would have never met that number.
My initial thought when talking about boosting this motor, is stay conservative unless you feel like building. You can boost a motor decently and get away with it for a while, but it will catch up to you.
Does anyone have a breaking down for th 3V?
Last edited by Moltenice; 11-25-2007 at 07:33 PM.
#34
11-25-2007, 07:32 PM
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#35
11-25-2007, 07:56 PM
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#36
11-25-2007, 08:46 PM
#37
11-25-2007, 10:26 PM
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#38
11-25-2007, 11:48 PM
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Not upgrading the fuel pump certainly isn't a terribly bright idea anyway. I have a 255 lph in-tank and a 320 lph in-line. The OP stated that JDM was upgrading the fuel system on his truck so that argument is kinda moot in addition to my stating already that having enough fuel available was key. If you are putting a supercharger on ANYTHING you better have the fuel system sorted out to begin with...that's just common sense.