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#4591576 - 12/01/17 11:23 PM Are pushrod engines being manufactured anymore ?
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
I mean for cars and light trucks obviously. Can you buy a new car or pickup with an OHV pushrod engine today, or are they all going to be OHC with variable valve timing ?

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#4591579 - 12/01/17 11:25 PM Re: Are pushrod engines being manufactured anymore ? [Re: Merkava_4]
Danno Offline


Registered: 10/07/12
Posts: 1993
Loc: Northern Ontario, Canada
The Chev V8s found in Corvette, pickups Camaro are all pudhrod design.
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#4591582 - 12/01/17 11:27 PM Re: Are pushrod engines being manufactured anymore ? [Re: Merkava_4]
4WD Online   confused


Registered: 09/21/10
Posts: 6431
Loc: Texas
GM & Mopar V8s? ... continue to make serious power >>> lower CG in Racing applications

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#4591589 - 12/01/17 11:43 PM Re: Are pushrod engines being manufactured anymore ? [Re: Merkava_4]
mechjames Offline


Registered: 01/16/08
Posts: 516
Loc: Richmond, BC, Canada
Chevy/GM V8's, Mopar V8's are all cam in block pushrod design.
Only Ford went overhead cam and didn't look back.
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#4591591 - 12/01/17 11:44 PM Re: Are pushrod engines being manufactured anymore ? [Re: Merkava_4]
OneEyeJack Offline


Registered: 09/14/10
Posts: 7480
Loc: S California
Chevy pushrod V8's make a lot of power in less space than many other engine configurations.

Check out the LT5 if you looking for some serious power.

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#4591606 - 12/02/17 12:26 AM Re: Are pushrod engines being manufactured anymore ? [Re: Merkava_4]
Colt45ws Offline


Registered: 08/15/06
Posts: 9648
Loc: Central Washington
Yes, Hemi and LS engines continue to be made in that configuration. Cam configuration really matters little. They are both pushing on valves in the head, just a different way of getting there. The valve and head configuration matters WAY more.
The advantage of OHC probably only comes in at ridiculously high RPM where the more direct action of the cam allows for lighter valvetrain and thus lighter valve springs. If you spin a OHV really high the inertia of the lifter, pushrod, rocker arm means you have to run really heavy valve springs to shove it all back. But Im sure this only really is an issue at 8, 9 grand.
Otherwise, the OHC has twice, four times the bearing surfaces to oil and create friction, and big long chains or belts.
I wish Ford had stayed with OHV. As mentioned OHV is way more compact. My 4.6L OHC is as tall and wide as a old 460 (7.5L) big block, its only shorter in length. Its ridiculous!
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#4591607 - 12/02/17 12:28 AM Re: Are pushrod engines being manufactured anymore ? [Re: mechjames]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: mechjames
Chevy/GM V8's, Mopar V8's are all cam in block pushrod design.
Only Ford went overhead cam and didn't look back.


So is GM making their cylinder deactivation engines while still using a pushrod design ?
So if I got rid of the cylinder deactivation, I'd have a regular pushrod engine ?

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#4591611 - 12/02/17 12:51 AM Re: Are pushrod engines being manufactured anymore ? [Re: Merkava_4]
dishdude Online   content


Registered: 11/14/08
Posts: 8765
Loc: Phoenix
.


Edited by dishdude (12/02/17 12:53 AM)
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#4591623 - 12/02/17 01:36 AM Re: Are pushrod engines being manufactured anymore ? [Re: Merkava_4]
Colt45ws Offline


Registered: 08/15/06
Posts: 9648
Loc: Central Washington
Originally Posted By: Merkava_4
Originally Posted By: mechjames
Chevy/GM V8's, Mopar V8's are all cam in block pushrod design.
Only Ford went overhead cam and didn't look back.


So is GM making their cylinder deactivation engines while still using a pushrod design ?
So if I got rid of the cylinder deactivation, I'd have a regular pushrod engine ?

Yes. And there are a lot of people doing it (removing the cyl deactivation). I forgot what all parts get changed but its supposed to help the oil burning issue big time.
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2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
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#4591652 - 12/02/17 03:51 AM Re: Are pushrod engines being manufactured anymore ? [Re: Merkava_4]
Silverado12 Offline


Registered: 02/26/13
Posts: 3117
Loc: Central Virginia
The GM 4.8 engine never had DOD but I don't think they make that engine anymore. The 5.7 Hemi in my Dodge doesn't have it either. The cars w/automatic trans have it, though.
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#4591680 - 12/02/17 05:56 AM Re: Are pushrod engines being manufactured anymore ? [Re: Merkava_4]
Panzerman Offline


Registered: 12/16/06
Posts: 4203
Loc: Port Orange, Florida
The 5.7 has deactivation as well as the 6.4 Hemi in Automatics only. As a matter of fact if you buy a standard with either engine you get hit with a Gas Guzzler tax.
6.4 Hemi we got gets 24-25 mpg on the highway. Pretty impressive. Also shoots down the whole 5w20 oil required since it runs on 0w40.
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#4591689 - 12/02/17 06:09 AM Re: Are pushrod engines being manufactured anymore ? [Re: Merkava_4]
555 Offline


Registered: 06/08/09
Posts: 373
Loc: New England
Depends on how many valves you want per cylinder too.
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#4591702 - 12/02/17 06:30 AM Re: Are pushrod engines being manufactured anymore ? [Re: 555]
Kira Offline


Registered: 08/19/10
Posts: 5263
Loc: Champlain/Hudson Valley
What does DOD mean? (3 posts above)

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#4591710 - 12/02/17 06:41 AM Re: Are pushrod engines being manufactured anymore ? [Re: Merkava_4]
AZjeff Offline


Registered: 01/14/11
Posts: 2656
Loc: PV Az
DOD = displacement on demand. GM's early acronym, now called Active Fuel Management (AFM).

What are you buying Merc?
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#4591730 - 12/02/17 07:07 AM Re: Are pushrod engines being manufactured anymore ? [Re: OneEyeJack]
Cujet Offline


Registered: 02/15/03
Posts: 7164
Loc: Jupiter, Florida
Originally Posted By: OneEyeJack
Chevy pushrod V8's make a lot of power in less space than many other engine configurations.


In fact, I am unaware of any modern production engine that has better power to weight or power to size. So much so, that it takes serious technical effort just to match the run of the mill LS3 in outright output.

In fact, a detuned, RPM limited, and reduced displacement (5.5L) normally aspirated, without adjustable cam timing, Chevy Small Block is what is currently used in the C7r, and it FLAT OUT cleans up in the racing circuits against uber high tech engines from Ford, Ferrari, Porsche, Jaguar and so on.


Edited by Cujet (12/02/17 07:14 AM)
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