36 Valve CTD .............

[DieselMinded]

12 ---24 ---Commonrail ---



Too quite... . lol



Too hard on fuel



Im just courious is it even mechanically posible to put 36 valves on an i6 cummins ... ..... MAn that baby would rattle !!!!!!



stupid question but It just came to me must be this Ohio water :-laf :-laf



tHE CLYNDERS would have to be big enough for 6 valves a piece ... . right???



DM



Been looking @ the new VW passat V10 diesel twin turbo stock !!!!!! thats too cool

 

[rbattelle]

I know Ferrari runs a 5-valve head on their engines (maybe Audi too?), which I think is about the maximum number you'd want. There's gotta be a tradeoff between the number of valves that will fit and the ratio of valve area to total cylinder area... 50 tiny valves won't flow as well as 2 big valves even if the total area of the 50 tiny valves is greater than the total area of the 2 big ones.



I'm just guessing (hopefully educated guesses). If I'm wrong someone correct me... . it's just my opinion.



-Ryan

 

[RBratby]

vw has a 20v 4cylinder for the beetle. i have read on here before that the 24v head flows more air than the 12v head.

 

[robertyoke]

I know Ferrari runs a 5-valve head on their engines (maybe Audi too?), which I think is about the maximum number you'd want.



you can thank yamaha for that! they were first for the five valve cyl. head.

 

[CumminsBu]

Yamaha has a five valve in their Rapator 600, How about something more like the Honda v-tec system?

 

[DieselMinded]

4 valves per clynder now Im pretty sure how big the piston is I wonder how much room is left after they added 2 more valves per clynder On 24v . . and If 6 valves per clynder would be inefficent some how... you'd think she sure would breath BETTER AND get lower EGTs also



if the clynder can do it whats the set bACK??



//////r///a///t//t////l////e////r//a////t///t//l////e//... ... . ??



IMO the 24v rattles more than the 12v... the 36v may shake you off the road.



:>

DM

 

[Timbeaux38]

"There's gotta be a tradeoff between the number of valves that will fit and the ratio of valve area to total cylinder area... 50 tiny valves won't flow as well as 2 big valves even if the total area of the 50 tiny valves is greater than the total area of the 2 big ones. "





Pretty much sums it up-



The common rail 24v's do not rattle ANYTHING like the 12v's- the rattle is not really in the valves- it is the ping off of the top of the pistion during detonantion.



Addingv more valves would not make more rattle, if that is what you are after-



If you want more rattle, crimp an injector line.

 

[SRadke]

Been looking @ the new VW passat V10 diesel twin turbo stock !!!!!! thats too cool

It definitly is cool but the twins are not compound At least they're trying



-Scott

 

[Mark_Kendrick]

It definitly is cool but the twins are not compound At least they're trying



-Scott

I bet we could fix that

 

[NPloysa]

Yes, the Audis are 5 valvers. At least my girlfriend's A4 2. 8L is!

 

[rbattelle]

It definitly is cool but the twins are not compound At least they're trying



-Scott

Is it wrong of me to think that the only "proper" way to turbo a Vee engine is to run 1 turbo per cylinder bank?

 

[lmills]

no, it's just another version of twin turboing. It's doesn't compound the air like the set up that we use.

 

[SRadke]

Not wrong, in fact better in my opinon. My point was that it isn't twins as we think of twins.



-Scott

 

[rbattelle]

Not wrong, in fact better in my opinon. My point was that it isn't twins as we think of twins.



-Scott

Take, for example, a quad-turbo Caterpillar V-16 engine (such as on the 797 large mining truck)... are those turbos compounded?

 

[SRadke]

I couldn't find any info to quickly answer your question. I did find this however:



"The Cat 797 is powered by a 24 cylinder V24 quad-turbo diesel engine that produces an amazing 3,400 horsepower. "



This would indicate the truck you're reffering to has 24 cylinders which I'm guessing is a combination of a pair of Cat's V-12's. They may or may not be married into a single crank or crank case but I'd guess it 4 individual turbos as on the smaller version, not compounded.



-Scott

 

[rbattelle]

I couldn't find any info to quickly answer your question. I did find this however:



"The Cat 797 is powered by a 24 cylinder V24 quad-turbo diesel engine that produces an amazing 3,400 horsepower. "



This would indicate the truck you're reffering to has 24 cylinders which I'm guessing is a combination of a pair of Cat's V-12's. They may or may not be married into a single crank or crank case but I'd guess it 4 individual turbos as on the smaller version, not compounded.



-Scott

Oops, thought it was a V-16. V-24 sounds even better, though!!



-Ryan

 

[nickleinonen]

them newer GE prime mover diesel engines "evolution" series v16's make 6,000hp and is bi turbo'd [one per 8 bank]... and same goes for GM/EMD's newest 4 cycle v16. bi-turbo and 6,000hp



i doubt i'll ever see one of them though... they require completely new tooling to work on them and that costs lots of $$$$... might maybe see one in a forgien unit [locomotive run by like NS, BNSF, CONRAIL, UP... ] coming through the service track at work

 

[Will24]

As far as I know, the big cats are not compounded, they have two turbos connected together at their turbine housings running in "parallel" as opposed to series.



-Will

 

[Will24]

Sorry to get off topic, but here's a pic of a big detroit (12v149) with quad "parallel" turbos







#ad




-Will

 

[Kennywould]

12 ---24 ---Commonrail ---



must be this Ohio water :-laf :-laf

Probably the water, been there done that! hehe. . Cam it up! Lift them puppy's open a little further! Do it with the BBC in the boat 739 lift solid roller! Cam it up cmon, don't be scared!



-Ken