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Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2583615
11/27/18 11:15 AM
11/27/18 11:15 AM
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Joined: Jan 2003
Posts: 13,362
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,362
Marion, South Carolina [><]
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Like has been said many times already...the oil ring location isn't your problem, the 4.5" crank isn't a problem, and worn valve guides and/or valve seals won't cause as much oil consumption as you have.
If the above was an issue, then my 572" hemi would have guzzled oil (all 3 "problems"), but it never has.
I still believe your issue all along has been ring seal.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2593374
12/17/18 09:21 PM
12/17/18 09:21 PM
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Joined: Mar 2010
Posts: 984
Tennessee
Hemi ragtop
OP
super stock
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OP
super stock
Joined: Mar 2010
Posts: 984
Tennessee
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So on to the next question. I have a buyer for the original un ported aluminum MP heads. I think that I should go with the new Edelbrock head designed for larger stroked HEMI engines, (mine is 540cid and will be larger once the bores are round and true).
I hate to go to all this work and expense and not make an improvement!
Combo is 4.375? Bore with 4.5 stroke. 248/254 @ .050, .585” lift net on a solid roller.
I am running a Mopar “Marine” intake with two 750 Hollys.
This is a 4,175lb STREET car with 3.54 gear and Gear Vendor overdrive.
It made peak power (635) at 5,900 rpm with the MP heads.
What do you all think about going to the Edelbrock heads?
Last edited by Hemi ragtop; 12/17/18 09:21 PM.
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Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2593415
12/17/18 10:42 PM
12/17/18 10:42 PM
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Joined: Jan 2003
Posts: 12,073
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,073
Benton, IL.
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Which would net the best bang for the buck; a quality port job on the heads you have or buying new heads?
Master, again and still
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Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2593420
12/17/18 10:47 PM
12/17/18 10:47 PM
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Joined: Jan 2003
Posts: 12,073
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,073
Benton, IL.
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And how does that intake and carb combo compare to an Indy DP and Dominator? I'll bet that the DP and a big Thumper Dominator would find some missing ponies. And maybe some better street manners to boot.
Master, again and still
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Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2593479
12/17/18 11:53 PM
12/17/18 11:53 PM
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Joined: Sep 2014
Posts: 4,457
Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Update. For all of you that said bore seal, you were right. Valve guide issues as well.
I spent a day in Greenville TN With Bob at Performance Automotive.
He did a lot of work on Allan Johnson’s Pro Stock project. The first thing he did was run a bore gauge in the cylinders. The block was bored and finished honed when I delivered it to the first shop. I have the receipts from Diamond Racing. The pistons (Diamond) were 8032 alloy, fit at .003-.0035.
So why was there an obvious cross hatch and a measurement of .007-.0075? The first shop obviously didn’t think there was enough clearance?
The intake guides were round, no taper and measured .0015-.0017. But the exhaust were round and straight but .006-.0065?
So, DOUBLE the ideal clearance on the pistons, causing ring failure. The extra clearance in the guides didn’t help either. I don't know of ANY ring that will seal with 100% or more clearance. Why guys don't believe what the piston manufacturer says for clearance isn't enough. I mean...if an extra .0005 (half a thou) doesn't keep the piston from sticking in the bore, nothing will. That excess clearance is a ring seal killer. I still believe that a coating from Line 2 line would have fixed that issue. And guides with a clearance like socks on a rooster won't help either.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2593489
12/18/18 12:02 AM
12/18/18 12:02 AM
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Joined: Jan 2003
Posts: 14,496
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,496
So. Burlington, Vt.
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Most of the time, the recommended clearance from the piston manufacturer is the minimum recommended clearance.
If that amount of oil was coming by the rings, the car should have been followed around by a continual cloud of blue smoke.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: HEMI oil consumption?
[Re: fast68plymouth]
#2593496
12/18/18 12:10 AM
12/18/18 12:10 AM
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Joined: Sep 2014
Posts: 4,457
Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Most of the time, the recommended clearance from the piston manufacturer is the minimum recommended clearance.
If that amount of oil was coming by the rings, the car should have been followed around by a continual cloud of blue smoke. True, but he also said the exhaust guides were loose too. The piston may not have been loose enough to road fog everything, but ring seal was certainly compromised.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2593663
12/18/18 11:14 AM
12/18/18 11:14 AM
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Joined: Jan 2003
Posts: 13,362
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,362
Marion, South Carolina [><]
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Porting the current MP heads is a better choice performance per dollar. Send them to MCH and have them CNC'd.
That much guide clearance definitely isn't a good thing, but it wasn't causing much, if any, of your oil consumption. Especially considering it was the exhausts and not the intakes that were worn.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: HEMI oil consumption?
[Re: an8sec70cuda]
#2593847
12/18/18 04:30 PM
12/18/18 04:30 PM
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Joined: Aug 2003
Posts: 43,157
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,157
Bend,OR USA
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Especially considering it was the exhausts and not the intakes that were worn. I had a set of BB iron heads that had less than .0030 guide to valve clearances that had oil running down them onto the top of valves that I saw when removing the headers  That was back in the days when some racers didn't run valves seals on the exhausts, me included   I started running them after that 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2593971
12/18/18 09:39 PM
12/18/18 09:39 PM
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Joined: Mar 2003
Posts: 4,848
Memphis
HemiRick
master
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master
Joined: Mar 2003
Posts: 4,848
Memphis
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My understanding is the stock heads were to big for 426 inches and they work much better w/ another 100 inches. What would the flow be of ported stockers @ .600 vs. the flow of stock Edelbrocks?
Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
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Re: HEMI oil consumption?
[Re: HemiRick]
#2594143
12/19/18 08:53 AM
12/19/18 08:53 AM
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Joined: Mar 2010
Posts: 984
Tennessee
Hemi ragtop
OP
super stock
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OP
super stock
Joined: Mar 2010
Posts: 984
Tennessee
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My understanding is the stock heads were to big for 426 inches and they work much better w/ another 100 inches. What would the flow be of ported stockers @ .600 vs. the flow of stock Edelbrocks?
My understanding is stock ported flow about 330 vs the Edelbrock 400
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