V Configuration engine's 'rumble'

[mic*]

no, new ones dont rumble because they no-longer have pushrods! (except the dinosaur V8s) more cams = smoother power => better technology

Which Austrlian production V8's are you refering to?

Seen a boss on a stand but didnt look closely. Thought twas pushrod tho.

And holden wont have an OHC V8 till the VE is released... Although someone was telling me theat Holden apparently are bringling out the "gen 4" or whatever the hell it is earlier. Apart from being OHC it can drop four cylinders in cruise mode, like you seen on the chrysler jeep ads.


Also, i agree with the V style having no great power torque advantage, but i thought that when you got them all the way flat ie boxer motor, that the crank easier to balance that an inline??? Also the longtitudinal style and low C.O.G. of the motor (Vs inline 4) are a nice platform to build an excellent handling vehicle.

I think the rumble has been explained. Doppler effect when two exhaust manifolds become one. And it can be made very minimal, which is why i beleive that you dont hear new factory v8's grumble so loud. Just got better exhaust designs round now.

[RONA]

Um the VE motor is still going to be a pushrod V8. It'll run the same motor as the VZ series two being the LS76 which is a derivate of the GEN IV V8 in the hsv's, except the cylinder head has been redesigned and compression is dropped back to like 10.3:1 from 11:1 of the Gen 4 motor.

They are an all new motor from the Gen 3 and the only thing shared is the stroke which means they still rev fairly well for a large capacity V8

The Boss V8 is a DOHC 32 Valve V8.

Displacement on demand is available on the gen 4 motors but as yet hasn't been incorporated in the HSV's, pretty sure the VZ series 2 LS76 run it though, also there is an option for a 24 valve head later on 3 inlet two exhaust but whether or not they bring it over here is another matter

[o_man_ra23]

Many good and valid points here. Something I would like to point out about the boxer engine... the horizontal opposion works to balance the motor horizontally. The problem is that it creates lateral polar vibration as well as the usual twisting torque. I must go now, but i will add more to this discussion later

Cheers, Owen

[no_tofu_speed]

no, new ones dont rumble because they no-longer have pushrods! (except the dinosaur V8s) more cams = smoother power => better technology

I thought the commodore and falcons, the new ones........ were still push rod.

As much as alot of people (well non holden/ford people) hate pushrods and say they are not an effficient engine configuration.
My father said he was sure alot of the big hp producing top fuelers........ well most of them are all pushrod config..... if that is true... they have got to have some pluses to them. U'd want to be as efficient/reliable as you can when trying to make that kinda engine, yes?
With that said, I heard alot of people were experimenting with the *uz in "street" drag classes (whatever they are, I dont know much about drags) and price/potential etc.... very nice suprise people have found.

[RONA]

No ya gits the commodores still run pushrod, but ford hasn't run pushrods since the BA came out with the V8 in early 2003 (BA was launched sans v8's in late 02). It runs a 5.4L block out of the trucks in the states with a 4.6L mustang head on it for the sports models, the others just run the graden variety heads.

[The Witzl]

Actually in a 90 degree V configuration engine all of the primary vibrations are cancelled out leaving only secondary vibration. This is why you can balance a 50c coin on the inlet manifold of a 1UZ and rev it to just under the redline without the coin falling over...

I actually revved mine right up to the redline, and it didnt fall over

Don't get a WRX if you want an evo.. it just won't work.

Correct.
WRX = Family car + hair drier.

Actually straight 8's were reasonably common in the pre-WWII days, quite a few manufacturers made them. There was even bigger stuff around like inline 12's, but I don't think they were used in cars. You're right though, any inline engine bigger than a six and you'll have problems with crank harmonics.

VERY common pre-WWII, just about every "stately" car featured an inline 8-cylinder engine, complete with rope main seals. They usually revved to about 3000rpm and were relatively small in capacity (by comparion to your chev/ford V8 blocks), for no reason other than they would probably harmonically disassemble.

DO NOT DISASSEMBLE JOHNNY FIVE!

What I want is a more powerfull car that drives the rear wheels, but is still light enough to chuck about a bit.

Anything. It'll still be better than a Honda.

[mic*]

Um the VE motor is still going to be a pushrod V8. It'll run the same motor as the VZ series two being the LS76 which is a derivate of the GEN IV V8 in the hsv's, except the cylinder head has been redesigned and compression is dropped back to like 10.3:1 from 11:1 of the Gen 4 motor.

They are an all new motor from the Gen 3 and the only thing shared is the stroke which means they still rev fairly well for a large capacity V8

The Boss V8 is a DOHC 32 Valve V8.

Displacement on demand is available on the gen 4 motors but as yet hasn't been incorporated in the HSV's, pretty sure the VZ series 2 LS76 run it though, also there is an option for a 24 valve head later on 3 inlet two exhaust but whether or not they bring it over here is another matter

Yeah spot on mate. Dug up the article. Tis old, and at the time of print was all for the VE commonwhore. Mate works for some Holden service ctr at Mt Gravatt and says no disp on demand yet... But when did VZ series 2 start? Maybe none due for first service yet?

[mc68]

One thing I've always been curious about is as to why there is no "V4" configuration engines... as in a V config four cylinder motor. Would have an insanely small footprint...

ever seen a SAAB V4? used to do quite well in rallies.

and dont discount bugati and alfa romeo from the straight 8 group

hmmm 2L 8cyl...yum

[Merudo]

Can't say I have. Would have an interesting exhaust note, yes?

[Joshstix]

Seriously people there is so much rubbish in here presented as fact that it just isn't funny. This thread is being locked as it is a classic example of people contributing rubbish to "hear there voice" rather than productive contribution, and I don't want to go through and take 10 rep of all the culprits.

Please people do not try to present opinion or theory as fact.