Thread: What caused my melted piston?
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10-31-2009 01:23 PM28 F1 Pantera - Sit down and foot throttle | DPM Drive
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10-31-2009 06:31 PM
Pics of the last victims......#5 & 8
14lbs and 7000 rpm on 604 cid. The wrong fuel mix. Easy to fix this time just two new pistons and rings.Got lucky
Notice the eyebrows both missing the thin sides.Forget Lightspeed go straight to LUDICROUS SPEED!!
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11-01-2009 12:25 PM
I have not posted here much if at all but I just read every page and since I just had the same problem with my 502 with a m3 procharger putting out 730hp and 785fpt I figured that I would chime in. Mine had dyno time plus 4 or 5 hrs. and long story short it was the water pick up. I would recomend putting a low water pick up on the boat. Don't know if you already have one but that was never asked in any of the posts.
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11-01-2009 02:30 PM
Block is perfect. Burnt through the MLS gasket between 5&7 a little.
Lots of talk on these motors but the facts are 1063 hp at 6.8 psi on pump and 1186 hp at 12psi could get more out of it at both psi but I had just one day on the dyno only ran six pulls.
And it was the five days before the Shootout.Last edited by WeaponX; 11-01-2009 at 07:07 PM.
Forget Lightspeed go straight to LUDICROUS SPEED!!
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11-01-2009 02:37 PMActually I did put on a new dual design pickup (engine and IC) after this incident so the flow is better now but it should have been sufficient enough before as well. I know the flow through the intercooler is alot better with the new pickupdesign.
I use the drive water pickup for the drive oil cooler.28 F1 Pantera - Sit down and foot throttle | DPM Drive
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11-01-2009 10:37 PMYeah man, you got real lucky, that's cool!!
I kinda got lucky like that once... Had an engine pop the head gasket out in the 11 oclock position on #7. Blew the chunk of gasket into the lifter valley...
Luckilly the gasket was the weak link otherwise the piston would have been moments later!
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11-03-2009 09:58 AMLast edited by Tomas Wallin; 11-03-2009 at 10:07 AM.
28 F1 Pantera - Sit down and foot throttle | DPM Drive
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11-03-2009 01:33 PMYou can do it a few different ways; 1. Route it to the front of the intake and "T" in with the hoses coming out of your intake (if you have plugs in the intake just use them), 2. Dump overboard, 3. Some guys have bungs welded on the tailpipes for the hoses to connect.
I'm using two #6 lines on either side of the intake which connect together via a "Y" connector that runs a single #6 overboard. If you have low water pressure you might want to tee in to the front of the intake or use smaller lines, possibly as small as 1/8". All you're doing is giving air pockets a place to escape.
I decided to dump overboard so I can peer over the side of the boat to make sure I'm pumping water at anytime.
I'd highly recommend doing it to relieve any air pockets in the heads (especially steel heads) to reduce the potential of detonation on the back cylinders.Last edited by Geronimo36; 11-03-2009 at 01:39 PM.