Inline VS Bent engines

Strange,
We ran plenty of 12V's and nothing that would point to any particular problem. They gave excellent service.
These were all running compressors so usually very little shock loading even with the ones with clutches, including the booster units.
Cheers Steve

wee-allis wrote:

Dave for me, I'd want 7 mains in an in line 6

Holden grey motors only had 5 main bearings Im pretty sure, kinda strange when I think about it but they must of been okay as plenty were hotted up for more go

Paul

Grey engines would rev OK but would bend pushrods on the over-run.

I'm surprised anyone bothers hotting one up nowadays as there are plenty of stock engines of a similar size that outperform of hotted up grey engine.

I alwasy hated the V series GMs,all the grommets and stuff would fall off the block as you were trying to put a head on.......one time I had a head slip off a block and fall out of a Denning and in the dirt......i got a straw broom,swept the dirt off top and bottom,and put it on the motor.......guy watching me was amazed ...........Never effected the way it went.............the GMs in compressors at the sandblasters all had several inches of sand in the sump from the Golden Ones habit of tipping oil into the motors with paint cans half full of sand.......actually not sand,but garnet.......they used to spear the diesel pump into a heap of garnet too,between uses..................Gms would. still go for 10,000 hrs between rebuilds.

An in line 6 runs naturally in balance due to the crankshaft arrangement. Can be improved by standardizing mass and center of mass of rods, pistons etc.
The V6 and V12 run in balance apart from the rocking couples caused by two big ends on the one crank pin. Opposed piston motors are similarly limited.

Other configurations do not run in natural balance and some run a balance shaft. All benefit from component standardizing as for the in line 6.

When the high performance V8 supercars are "balanced" by standardizing or blue printing components, reliability at high output is gained by using
improved materials and manufacturing methods. The large forces generated need to be catered for.

The V8 is a compact design for high output in a short space. The early side valve Ford is really compact apart from the carby and air cleaner sticking up.

Early in line 6 petrol motors with single carby were "asthmatic", end cylinders not fuelled as well. Multiple carbies and extractors or headers were an
attempt to improve their output. Examples - Chev, Holden, Bedford, International and Ford. This feature did limit revs so helped preserve them a bit.

Lots of You Tube info on the Ford 300 in line 6 truck motors. Good strong unit, 7 bearing cranks. Pick the right modifications to build a good motor.

All a compromise between cost, convenience and performance. Most truck makers have been settled on in line 6 motors for years now.

Just some points of view. Paul.

The V6 isnt all you may think, or is it ?



Paul

An inline engine



A bent engine



This is from a curved engine

The Kawasaki is actually a 3 cylinder 2 stroke known as the Mach III.

The Honda CBX is the best known in line 6.

Looks like 5 to me.

That bloke has been building those for easily 20 years now.
Actaully, a normal one of those went the other way both ways on Saturday between Ipswich and Freestone (near Warwick).

Jarrod.