Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2580630
11/20/18 02:27 PM
11/20/18 02:27 PM
|
Joined: Jan 2003
Posts: 17,914 S.E. Michigan
ZIPPY
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 17,914
S.E. Michigan
|
This is a Mega Block, the area in question is between #2 and #3, that area should be solid! I'm thinking you must really mean 2 and 4. Or maybe 3 and 5. Given the odd pattern of corrosion I wonder if the bores were straight from the get go. Although we will never know the answer, It's safe to say they're not going to be straight now. If the corrosion got to the rings, looks like there is a good chance of that, then safe to assume they're gone. I suggest check ring side clearance and overall condition of the ring grooves before putting pistons up for sale or deciding selling price, (to avoid angry future customers). Good chance they are still OK but never hurts to make sure. 7.10 rod and 4.50 stroke is probably the path of least resistance in terms of not only known decent rod ratio (Same as a Pontiac 455, can't get much more conservative than that) and relatively quick/easy parts availability.
Rich H.
Esse Quam Videri
|
|
|
Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2581100
11/21/18 03:02 PM
11/21/18 03:02 PM
|
Joined: Jan 2011
Posts: 4,785 Utah and Alaska
astjp2
master
|
master
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
|
A good machine shop should get you squared away, also the 4.5 stroke should not be a factor...
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
|
|
|
Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2583068
11/26/18 12:23 AM
11/26/18 12:23 AM
|
Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
|
master
Joined: Sep 2014
Posts: 4,457
Washington
|
A little history here, this was one of the last assembly’s done at the now defunct Diamond Racing. Crank is standard Mopar journals. Fine for a race engine, this one was originally intended for boost, but not what I want for a street engine. I've run the ring around the wrist pin many times. That's not why it's using oil. Unless I'm missing something, there is no reason to think that the oil ring passing around the wrist pin will cause an engine to use oil. I'd keep looking.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
|
|
|
Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2583157
11/26/18 11:33 AM
11/26/18 11:33 AM
|
Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
|
master
Joined: Sep 2014
Posts: 4,457
Washington
|
Granted, the bores are not what they should be but I have always understood that unsupported oil ring is a no no for the street. Even Rich in his blook says to stay away from it. I'm sure it's said to stay away from it. Sometimes you can't. But oil consumption because the oil ring isn't supported 100% by aluminum but is supported 90% or even 80% by aluminum and the rest by steel doesn't affect oil control as I've seen it. The biggest things for oil control are bore geometry, crankcase pressure and second ring design. To me, oil ring placement is like connecting rod side clearance. It's been taught wrong for decades and sometimes still is. I suspect long after I'm dead someone will still go berserk because the side clearance was over .024 or some silly number such as that. I'd hate to see you spend a bunch of time and money and not fix the issue. IMHO, your problem isn't in oil ring placement. But I've been wrong before. Just ask my wife. EDIT: I should add the biggest oil burner I've seen was a customer who did his own engine assembly. The engine was a mosquito killer and the blame went to me for my honing procedure. When the customer finally got tired of bitching about how crappy my cylinder honing was, he pulled the engine to take it apart so it could have the bores "touched up" by a "real machinist" who understood "how to run an F'ing hone". The bad thing was...once it was apart, he realized HE didn't install the oil ring spacer. Of course, he didn't go back to the track for 4 consecutive weeks and tell everyone who would listen how stupid the engine assembler was. I post that because 1. It's damn funny and 2. Because stuff happens. It's not always what is blatantly obvious that is the issue.
Last edited by madscientist; 11/26/18 11:39 AM.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
|
|
|
Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2583173
11/26/18 12:41 PM
11/26/18 12:41 PM
|
Joined: Jan 2003
Posts: 13,402 Marion, South Carolina [><]
an8sec70cuda
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
|
Found the problem, no wonder it used oil street driving! The oil rail is through the wristpin hole. Useless for a street engine! I find this is common for a 4.5” stroke. So, a Callies 4340 billet crank balanced with Mallory metal, Diamond 3.50” pistons 10.8 cr at 0 deck, are all up for grabs. Nope, that's not why you're burning oil. That ring setup is NOT a no-no for the street. My hemi is like that and uses no oil.
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
|
|
|
Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2583176
11/26/18 12:50 PM
11/26/18 12:50 PM
|
Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
|
Many(most?) 1.320 c/h pistons used in low deck 451/470/511 builds have the pin bore in the oil ring groove.
Same with lots of SBC stroker combos.
If the oil is coming past the rings(especially that much oil), the perimeter of the piston tops should be pretty much completely clean.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
|
|
|
Re: HEMI oil consumption?
[Re: Hemi ragtop]
#2583334
11/26/18 06:46 PM
11/26/18 06:46 PM
|
Joined: Aug 2003
Posts: 43,308 Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,308
Bend,OR USA
|
Last edited by Cab_Burge; 11/26/18 06:47 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: HEMI oil consumption?
[Re: Cab_Burge]
#2583366
11/26/18 07:55 PM
11/26/18 07:55 PM
|
Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
|
master
Joined: Sep 2014
Posts: 4,457
Washington
|
The picture the OP posted shows the spacer rail installed. Again, that isn't the OP's issue and I hope he keeps looking so he doesn't go through this again.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
|
|
|
|
|