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 How much boost is safe???
#869969
02/18/08 08:47 PM
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Joined: Jan 2008
Posts: 24
OP
Need a Spot
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How high have you pushed your diesels? Also, do any of you know if there are any stronger head bolts available for this engine (4D55/56)?
I have a big ford/international powered diesel truck and ARP has an off the shelf kit for that engine, but I can't find anything for the mitsubishi duesels.
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Re: How much boost is safe???
[Re: david85]
#869970
02/18/08 09:53 PM
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Joined: Jan 2005
Posts: 1,538
Body Damage is Cool
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you can run 20lbs. make sure you crank the pump though as you will lean it out.
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Re: How much boost is safe???
[Re: torquemonster]
#869971
02/19/08 04:05 AM
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Joined: Jan 2008
Posts: 24
OP
Need a Spot
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Thanks for the info.....but diesels don't run a fixed mixture ratio, so what is the harm in running lean??
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Re: How much boost is safe???
[Re: david85]
#869972
02/19/08 05:46 AM
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Joined: Apr 2006
Posts: 1,412
Body Damage is Cool
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Not really any harm, but you won't make any more power with all that extra air if you don't add fuel. Good read on diesels: http://www.diesel-central.com/News/cackle.htm
1991 Mitsubishi Pajero XP TD LWB family hauler.
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Re: How much boost is safe???
[Re: redbull]
#869973
02/19/08 07:10 AM
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Joined: Jan 2005
Posts: 1,538
Body Damage is Cool
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more fuel+more air=more power...simple
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Re: How much boost is safe???
[Re: torquemonster]
#869974
02/19/08 09:02 PM
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Joined: Jan 2008
Posts: 24
OP
Need a Spot
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Aahh, OK. I thought you meant it could harm the engine from running lean, which I know not to be the case with diesels. I've been driving/modding diesels for most of my driving life now. Theres something about that rattle <img src="/forums/images/graemlins/kewl.gif" alt="" />.
So I guess there are no options for stronger head bolts then?
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Re: How much boost is safe???
[Re: david85]
#869975
02/19/08 10:34 PM
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Joined: Apr 2006
Posts: 1,412
Body Damage is Cool
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1991 Mitsubishi Pajero XP TD LWB family hauler.
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Re: How much boost is safe???
[Re: redbull]
#869976
02/20/08 04:14 AM
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Joined: Jan 2008
Posts: 24
OP
Need a Spot
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Tried Emailing, but got no reply. Their list of engine head bolt/stud kits mentions nothing about the 4D55/56 diesel engines. My feeling is that there is a stud that they make that would fit, but finding it would involve cross referencing the application based on the type of stem instead of part number. Its very rare that anyone with access to the part numbers is willing to do that leg work for you. So for now, I'll probably have to reuse the old bolts.
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Re: How much boost is safe???
[Re: david85]
#869977
02/20/08 04:30 AM
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Joined: Apr 2006
Posts: 1,412
Body Damage is Cool
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I'd phone them. 800 number - nothing to lose. 1863 Eastman Avenue Ventura, CA 93003 Hours: 7:30am - 4:30 pm PST email: info@arpfasteners.comOrder Desk & Technical Support: 800.826.3045 or 805.339.2200, fax: 805.650.0742 Sales & Marketing: 800.826.3045
1991 Mitsubishi Pajero XP TD LWB family hauler.
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