Throwing away M-55HV where to go now?
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Joined: Nov 2008
Posts: 124
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From: springfield OR
Car: 85 Z28 scca C Prepared
Engine: 5.7 348 RWHP
Transmission: t5
Axle/Gears: dana 44 3.41
Throwing away M-55HV where to go now?
OK so just built a new 350 for my autocross car but after the first few races realised the high volume pump was sucking the pan completely dry. The bearings are barely broken in and they have a farely loose .0035 clearance. so do I go M-55 or M-55A 30wt oil, 40wt oil? any other suggestions. Motor made 348hp and 331 tq at the wheels rev limited at 6500 and hits it on a regular basis
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Joined: Jul 1999
Posts: 17,262
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Throwing away M-55HV where to go now?
I run a standard low volume pump in my engine. It provides 70 psi at 7400 rpm.
Nobody really needs a high volume pump for that exact reason. At high rpms, it will suck the pan dry. A standard pump will provide more than enough oil.
Nobody really needs a high volume pump for that exact reason. At high rpms, it will suck the pan dry. A standard pump will provide more than enough oil.
Thread Starter
Member
Joined: Nov 2008
Posts: 124
Likes: 0
From: springfield OR
Car: 85 Z28 scca C Prepared
Engine: 5.7 348 RWHP
Transmission: t5
Axle/Gears: dana 44 3.41
Re: Throwing away M-55HV where to go now?
Standard volume and standard pressure? so basically melling's more expensive version of the m55?
Moderator
Joined: Jul 1999
Posts: 17,262
Likes: 168
From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Throwing away M-55HV where to go now?
Standard volume but the higher pressure spring in the pump.
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Joined: Jun 2006
Posts: 2,199
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From: West-Central
Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: Throwing away M-55HV where to go now?
I used the yellow standard pressure spring in the M55HV oil pump. http://www.youtube.com/watch?v=tOiHd...eature=related http://www.youtube.com/watch?v=7IpJl...eature=channel
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