I know my brother tested out one of the new 6.4's and said even with the sequential turbos setup it spooled just like the 6.0 no improvement. You would think they could have elimanated most of that...

 

It's ok, allot of us have gotten fired up over that one.

 

yes, ptgarcia is correct, I was joking.

Couple always-posted things that drive me nuts:

1. "cumminGs"
2. "ford owns cummins"
3. "the allison 1000 is just another hydramatic, its not actually a real allison, GM just used the name"
4. "LOOK HERE (link)!! THE LARGST DIESEL ENGINE IN THE WORLD! HOW ABOUT THAT TORQUE!!" (im sure you all know what im talking about, that huge japanese engine that has a 10 foot bore and makes like 500 billion ft lbs of torque). Between all the diesel forums I have seen that link posted at least 75 times.

ok sorry im off topic.

ben

 

According to news reports ford did in fact file a lawsuit against navistar for excessive warranty costs (go figure) as well as the increase in cost for the 6.4. Hey, what do they have to lose. When you are purging cash at the rate of nearly $13billion annually you have to stem the tide some how. You would think that would put the whole "ford owns cummins" nonsense to rest. As inept as their management appears to be, wouldnt the casual observer even realize if they owned cummins they would put them in their otherwise nice trucks.

 

Man if I was Navistar I would drop Ford and tell them to design and build your own wonderful diesel engine.

In addition, for the use of this forum, profane posts should be considered those completely spelled words, or partially spelled words with use of keyboard symbols that suggest a profane meaning. We repeat, profane posts will absolutely not be tolerated on this website and its forums.

 

Boss just ordered me one, will be here the end of march. I'll post some pics comparing my 07 ctd engine bay to the 6.4tt

 

Twins always lite slower than a single unless you run a very small secondary,and then exhaust restriction plays a role on top end when the primary is doing its thing.Anytime you twin something it lights noticeably slower than the secondary would when run as a single.The fact that it lights as fast as a stock 6.0,while meeting the new emissions regs,which are 90% less soot,tells me they reduced the turbo size of the secondary quite a bit,so dont expect big power numbers out of these twins,they are likely small to meet emissions.

Ford has alot riding on the success of the 6.4. Unfortunately,they are still running only 10 head bolts in the 6.4 engine,but they are now larger at 16mm.I still do not feel this is even enough clamping pressure.They should have 5 or 6 per cylinder.Even if they head gaskets last 150K miles,it isnt enough ,IMO,they should last longer,esp on an engine that requires you to remove the cab to do any engine work what so ever.I find it intersting that Navistars highest rated 6.4 is 230HP. To me that says it all,I bet they have no troubles with there versions at 230hp.IAs of now I feel this is the power level this LIGHT duty engine is capable of producing ,if you want it to live a long,long life like the 7.3PSD's and early IDI's.To make big power with long term reliability/durability you need either a bigger engine or heavier duty contruction on the smaller ones.The much heavier built Cummins with a single is still going to outlive the 6.4 easily,with complete new engines costing 10-15K now,this is a big deal down the road a few yrs for hotshotters esp.

 

I will come right out and admit that I am a "Ford guy." My whole extended family has traditionally driven Fords, too. Having said that, I have no problem with Dodges (atleast the ones with Cummins engines under the hood ) and my dad has even purged his fleet of pickups and is now running two Dodges and one Chevy D-Max. There's a long story there, but the short story is my dad is a former trucker (that's where his love of the Cummins I-6 comes into play) and Ford has traditionally had either weak transmissions (E4OD and 4R100...but my 4R100 has been solid) or the 6.0L V-8.

The '92 and '93 Dodges are bones and we both realize this, but the 12V Cummins engines were worth the money he paid for the trucks. Personally, we'd both love to have either '04 or '05 Dodge 3500 Cummins trucks, but there's only so much you can do financially and I couldn't get rid of my '03 7.3L F-350. It's been too good.

We all need Ford to stay in this game, fellas. The bar has been raised only through competition and much of this competition was started in '89 when Dodge introduced the 5.9L Cummins into a pickup and again in '94 when Dodge released its new big-rig design.

 

Well said Wobblin'. Glad to have you here.

 

The Cummins doesn't need "twins" to make big torque.

 

My Googleing indicates that the Ford 6.4L is running parallel twins. Two smaller turbos in parallel have been used before (e.g., Porsche, Volvo S80) by OEMs to improve spoolup and reduce turbo lag as compared to one larger turbo.

Rusty

 

That contradicts the info I have read Rusty.These twins are in compound,and the secondary is a VGT.If you look closely at pictures that were posted,you can see the piping and how the boost from the big guy feeds the small guy,and the path the exhaust takes going from the little ex housing then thru the larger primary ,then the downpipe.
On a diesel 2 smaller turbos would have a hard time making 42psi of boost,and the packaging would be much different,they would likely hang them on the sides of the engine,to free up space on top,and makie it neater.Its all stuffed in the valley because all the exhaust energy goes thru both turbos.

 

It was Gm,toyota,DC in jan of 07,thats only I month,but toyota expects to stay in number two position,Ford will probably surpass DC for number three,thats all vechicles sold,not just trucks. DC just announced the lay-off of 10K workers and the closing of two manufacturing plants in the USA.

 

To the best of my knowledge the two turbos on the new 6.4L are in fact sequential turbos with the smaller turbo being backed up/feeding into the secondary larger turbo.

They are not "twins."

 

I'll defer to your sources, but try Googling "Ford 6.4L twin parallel" and see what you come up with. I guess there's a lot of misinformation out there.

Sorry for the inconvenience.

Rusty