Chevy 4 Cylinder engine

Larry Davick

Larry Davick

Well-known member
May 9, 2007
3,778
23
48
Fremont, Ca.
I hadn't realized how far engine technology has come. Chevy announced a 4 cylinder engine for their pickup trucks that produces 310 hp and 348 lb-ft of torque, with that torque peaking from 1,500 to 4,000 rpm.

We've got room under the hatch for 2 of those!

Larry Davick
Fremont, California
A Mystery Machine
'76 (ish) Palm Beach
 
> I hadn't realized how far engine technology has come. Chevy announced a 4 cylinder engine for their pickup trucks that produces 310 hp and 348
> lb-ft of torque, with that torque peaking from 1,500 to 4,000 rpm.
>
> We've got room under the hatch for 2 of those!
>
> Larry Davick

Larry,

That reads great, but there is a large gap between a passcar (a pickup is a passcar) rating and a real heavy duty rating.

I would lay down money that if they try to do what we do with that turbocharged engine, they will have to add jacket and oil cooling to the
installation and I would not be surprised if they did also do a significant de-rate. Many current light truck drivelines have a computer controlled
de-rate system that is hidden from the operator. When the manifold pressure and fuel flow is too high for too long, it will back off on both to save
the warranty. With the "drive by wires" and limited instrumentation, this can be difficult to detect.

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
 
That's why I'd put in two ;-)

Larry Davick
Fremont, California
A Mystery Machine
'76 (ish) Palm Beach

>
>

>
> > > I hadn't realized how far engine technology has come. Chevy announced a 4 cylinder engine for their pickup trucks that produces 310 hp and 348
> > lb-ft of torque, with that torque peaking from 1,500 to 4,000 rpm.
> >
> > We've got room under the hatch for 2 of those!
> >
> > Larry Davick
> >
> > > Larry,
>
> That reads great, but there is a large gap between a passcar (a pickup is a passcar) rating and a real heavy duty rating.
>
> I would lay down money that if they try to do what we do with that turbocharged engine, they will have to add jacket and oil cooling to the
> installation and I would not be surprised if they did also do a significant de-rate. Many current light truck drivelines have a computer controlled
> de-rate system that is hidden from the operator. When the manifold pressure and fuel flow is too high for too long, it will back off on both to save
> the warranty. With the "drive by wires" and limited instrumentation, this can be difficult to detect.
>
> Matt
> --
> Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
> Electronically Controlled Quiet Engine Cooling Fan
> OE Rear Drum Brakes with Applied Control Arms
> SE Michigan - Twixt A2 and Detroit
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
both BMW and Lancia were pushing well over 600 HP from inline fours back in the late '70s with their racing efforts. the Lancias had a supercharger
ontop of a turbo charger to eliminate turbo lag.
 
However, didn’t those have to be revving quite high to develop the high hp?
Our GMC 455 and 403 rarely go over 3000 rpm.

Emery Stora
77 Kingsley
Frederick, CO

>
> both BMW and Lancia were pushing well over 600 HP from inline fours back in the late '70s with their racing efforts. the Lancias had a supercharger
> ontop of a turbo charger to eliminate turbo lag.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
I was impressed by the torque numbers at the low RPM on those new Chevy 4 cylinder engines.

Larry Davick
Fremont, California
A Mystery Machine
'76 (ish) Palm Beach

>
>
> However, didn’t those have to be revving quite high to develop the high hp?
> Our GMC 455 and 403 rarely go over 3000 rpm.
>
> Emery Stora
> 77 Kingsley
> Frederick, CO
 
Most of these current turbo 4’s have huge amounts of torque down low and (relatively) low redlines. For the most part - they’re built to replace V6 engines. The forced induction V6’s are replacing the V8’s, etc...

It will be interesting to see how they fair in the long term - they’re pretty highly stressed engines.

Rob
Victoria, BC
76 Royale - Rear Twins/Dry Bath

>
> However, didn’t those have to be revving quite high to develop the high hp?
> Our GMC 455 and 403 rarely go over 3000 rpm.
>
> Emery Stora
> 77 Kingsley
> Frederick, CO
 
Remember the Chevy pickup truck ads from back in the '70's boasting how a Chev pickup could plow a field.... It may be able to put out some power for
a short period of time, but you don't see farmers out there ploughing the fields with their pickups.

--
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
 
I also remember when you could buy a Chev "delete rear bumper, radio, 1
windshield wiper, no defroster" for under $2000.00. Long time ago. No, it
wouldn't plow the fields either.
Jim Hupy

> Remember the Chevy pickup truck ads from back in the '70's boasting how a
> Chev pickup could plow a field.... It may be able to put out some power for
> a short period of time, but you don't see farmers out there ploughing the
> fields with their pickups.
>
> --
> Bruce Hislop
> ON Canada
> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> My Staff says I never listen to them, or something like that
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
But the Ford Model T was used extensively with a plow behind it.
They sold Model T tractor conversion kits in the 1930’s.

Emery Stora
77 Kingsley
Frederick, CO

>
> I also remember when you could buy a Chev "delete rear bumper, radio, 1
> windshield wiper, no defroster" for under $2000.00. Long time ago. No, it
> wouldn't plow the fields either.
> Jim Hupy
>

>
>> Remember the Chevy pickup truck ads from back in the '70's boasting how a
>> Chev pickup could plow a field.... It may be able to put out some power for
>> a short period of time, but you don't see farmers out there ploughing the
>> fields with their pickups.
>>
>> --
>> Bruce Hislop
>> ON Canada
>> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
>> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
>> My Staff says I never listen to them, or something like that
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Very true Emery, but the ones I've seen also used chain drive reduction to the rear wheels to increase the torque.

The Ford 8N tractors used automotive pistons, but they could barely pull a 2 bottom plough.

--
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
 
But it's still a 4 cylinder engine.

In my opinion, the worst thing about a 4 is the way it idles with the trans in gear and the air conditioner on. They're better than the crappy 4
cylindered cars of the 70's and 80's but the late model 4's I've been in still let you know there's a 4 cyl throbbing under the hood. Fine for a cheap
economy car, not what I would want to drive every day.

The second worst thing about a 4 is that it sounds like a 4. I don't like it. Buzz, buzz, buzz.

I prefer a V8 but will drive a V6 if the 8 is not available. I would not buy a 4 unless in a cheap economy car with manual trans.

Just my opinion.
--
Bob Heller
1974 X-Canyonlands 26ft
Original 455 exc for timing chain,
Rockwell intake, valve covers. 141k miles.
Winter Springs FL
 
The sound of these high output 4’s is extremely crappy (IMO).

A friend just bought a BMW 228i (2.0 litre 4) - the exhaust note is horrible. But virtually all of the manufacturers are now piping a pleasant exhaust note through the stereo - so inside it sounds like a BMW straight six (a VERY nice sound)...

With most brands the fake engine sound can’t even be disabled without pulling a fuse.

Rob
Victoria, BC
76 Royale - Rear Twins/Dry Bath

>
> But it's still a 4 cylinder engine.
>
> In my opinion, the worst thing about a 4 is the way it idles with the trans in gear and the air conditioner on. They're better than the crappy 4
> cylindered cars of the 70's and 80's but the late model 4's I've been in still let you know there's a 4 cyl throbbing under the hood. Fine for a cheap
> economy car, not what I would want to drive every day.
>
> The second worst thing about a 4 is that it sounds like a 4. I don't like it. Buzz, buzz, buzz.
>
> I prefer a V8 but will drive a V6 if the 8 is not available. I would not buy a 4 unless in a cheap economy car with manual trans.
>
> Just my opinion.
> --
> Bob Heller
> 1974 X-Canyonlands 26ft
> Original 455 exc for timing chain,
> Rockwell intake, valve covers. 141k miles.
> Winter Springs FL
 
> But it's still a 4 cylinder engine.
>
> In my opinion, the worst thing about a 4 is the way it idles with the trans in gear and the air conditioner on. They're better than the crappy 4
> cylindered cars of the 70's and 80's but the late model 4's I've been in still let you know there's a 4 cyl throbbing under the hood. Fine for a
> cheap economy car, not what I would want to drive every day.
>
> The second worst thing about a 4 is that it sounds like a 4. I don't like it. Buzz, buzz, buzz.
>
> I prefer a V8 but will drive a V6 if the 8 is not available. I would not buy a 4 unless in a cheap economy car with manual trans.
>
> Just my opinion.

Inline fours dont sound like flat fours and even the same case/block configuration will sound different with different crankshaft journal spacings.

thats what Ive been wondering about this new GM four, what is it? an inline with flat plane crankshaft or a V4 or a H4, do two cylinders fire
together?

for smoothness, V12s are pretty sweet: https://www.youtube.com/watch?v=WGE6M75McPI

OPs idea about a twin engined GMC would be radical but with the new engine management/electronics, completely doable and 4WD would be good.

two flat four cylinder engines (lowest profile) would be best for this I think (while we are dreaming).
 
This strikes me the same as 'neuticles' (fake plastic testicles) fitted to neutered dogs.

--johnny
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
 
> I hadn't realized how far engine technology has come. Chevy announced a 4 cylinder engine for their pickup trucks that produces 310 hp and 348
> lb-ft of torque, with that torque peaking from 1,500 to 4,000 rpm.
>
> We've got room under the hatch for 2 of those!
>
> Larry Davick
> Fremont, California
> A Mystery Machine
> '76 (ish) Palm Beach

I wonder how long it is? At 167 Cubic Inches, maybe there would be room for the 8-speed transmission. I can dream.
--
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
 
This would not be the first time there was a twin 4cyl GMC... as delivered to Grayhound, the GMC Scenicruiser had twin 4-71 Detroits linked with some
sort of hydrostatic coupling. At the time there were no single diesels large enough to propel the bus... at least from Detroit. Apparently the
setup was difficult to sync up, and was also very high maintenance. When the 8v71 came out a few years later, Grayhound paid Marmon Harrington to
convert them all to the more traditional setup.

https://en.m.wikipedia.org/wiki/PD-4501_Scenicruiser
--
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
 
TV Tommy IVO ran twin Buick V8s joined at the ring gears on the flywheels
at the drags back in the day. Tony Nancy built the chassis and fully
streamlined body. Very competitive. Did a lot of exhibition appearances as
there were not many twin engine dragsters. "Freight Train" was another.
That was two Chryslers in line, joined with industrial chain couplers.
Jim Hupy

> This would not be the first time there was a twin 4cyl GMC... as
> delivered to Grayhound, the GMC Scenicruiser had twin 4-71 Detroits linked
> with some
> sort of hydrostatic coupling. At the time there were no single diesels
> large enough to propel the bus... at least from Detroit. Apparently the
> setup was difficult to sync up, and was also very high maintenance. When
> the 8v71 came out a few years later, Grayhound paid Marmon Harrington to
> convert them all to the more traditional setup.
>
> https://en.m.wikipedia.org/wiki/PD-4501_Scenicruiser
> --
> Mark S. '73 Painted Desert,
> Manny 1 Ton Front End,
> Howell Injection,
> Leigh Harrison 4bag and Rear Brakes,
> Fort Worth, TX
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
Then there is "Golden Rod".
4 each Chrysler 426 hemis geared to all four wheels and still is the record for naturally aspirated piston engine wheel drive since 1962(iirc).

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
 
Why limit yourself to TWO Buick V8’s??

https://goo.gl/images/83aZYy

The “Showboat”: quad Buick V8’s and AWD! You can see it run in the Bikini Beach movie (of course being driven by a chimpanzee).

Rob
Victoria, BC
76 Royale - Rear Twins/Dry Bath

>
> TV Tommy IVO ran twin Buick V8s joined at the ring gears on the flywheels
> at the drags back in the day. Tony Nancy built the chassis and fully
> streamlined body. Very competitive. Did a lot of exhibition appearances as
> there were not many twin engine dragsters. "Freight Train" was another.
> That was two Chryslers in line, joined with industrial chain couplers.
> Jim Hupy
 
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