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Quote:
Originally Posted by eight
yeah, just look in any hotrod mag and you can see where all the power is coming from. nobody runs smallblocks with aluminum heads and aftermarket parts anmore. all the cool kids run stock amc 360's. why, i was having lunch with zora arkus-duntov and dale earnhardt sr. last week and they both said they are switching to amc 360's this year...er something.
Yea the aftermarket has figured out to make a SBC work well.
I wonder how many of those people are running stock shortblocks......Quote:
Originally Posted by agjohn02
why would not just swap in a 4.6 w/ a cam and some head work and be done w/ it..plus you save 300lbsQuote:
Originally Posted by eight
Been trying to tell you to do that instead of satisfying your diesel fetish on the series truckQuote:
Originally Posted by Graystroke
A 4.6 is wider than a big block, it doesn't fit between jeep fenderwells. And it uses 4 cams which end up being really expensive to replace. But it has a nice stong bottom end, good enough that chevy copied it in the LS series. I thought the modification for these was to blow more air into it.
think buick/leyland/rover, not fordQuote:
Originally Posted by eight
ok its getting off subject but keep it to the original thread idea.
OK the 3.9 is too heavy, expensive, and a 4 cylinder.
Get a 6.5 with a manual pump.
which 3.9 is a 4 cyl?Quote:
Originally Posted by eight
edit: nevermind im an idiot
what did you expect...TAMOR is a forum with ADD
Hell yah. Thats the spirit!Quote:
Originally Posted by eight
I talked with my instructor today and he said that I could add twin Turbos and play with the valve and injection timing and push upwards of estimated 250Hp and 450 torque (same if not more than the 6.5) and still get around 30mpg.
what did your instructor say about the vibration issue?
theres a catch there, you get 30mpg when not using the power, if your using the power, no 30mpg
He said on the vibration shouldnt be that bad, bout as bad as a dodge one, i can buy some better isolators for the mounts and then bout as much vib as a SBC.
It's a cool motor, but don't think it's a practical swap. Do it for the cool factor, and don't try to justify it any other way. Cool is valid.
your instructor is not very smart. a 4 cylinder would be noticebly rougher than a six...hence a balance shaft on most 4 cyl. the 4bt was originally designed for industrial stationary use. cummins didn't give a **** when their 4bt was vibrating away while pumping water into an irrigation ditch in the middle of a field. a friend of mine use to have quite a few on his ranch and said they ran forever but you had to take a tool set around to all of them and tighten loose bolts.Quote:
Originally Posted by Reckless
did your instructor forget that straight six cylinders are naturally balanced b/c of their firing order?
why do you think v-12's are so smooth
I know what you mean by the vibrations but those can be isolated with better mounts and other mods that wouldnt be that expensive. If you play with the injection timing, you can bring down the vibrations, thats why the duramaxes are so quiet and smooth, because of the timing and duration of injection. So if i play with the timing and duration the vibs wont be as bad. We have 3 of them in the shop and none are as bad as one would think. And yes the cool factor is one of the players in this eventual swap!
If you retard the timing to smooth it you'll loose power, mileage, and get higher EGTs.
duramax is different breed from a mechanical cummins 4bt. duramax's are common rail and run electronic injectors that can be held open at different intervals/durations. 4bt's timing is linear in that it is fixed and uses mechanically timed injections of fuel and a poppet style mechanical injector. can't compare the two except that they both use diesel fuel.
bingoQuote:
Originally Posted by AgDieseler
I don't believe you could make a cummins whatever run as smooth as a SBC. If you can, you are not very good at tuning the SBC...
Agreed. I have been around enough 6bt's to draw the conclusion that they are noisy and vibrate more than any tuned gasser I've seen. The 6.2 in pigpen vibrates more though but it has poly spring bushing motor mounts.Quote:
Originally Posted by BMFScout
More fuel and boost will smooth out that little guy. :gigem:Quote:
Originally Posted by afroman006
Smartass. I still think it has a cylinder with low compression. Is it possible for the compression to be low enough in one cylinder where it doesnt fire at idle but it does when you give it just a little bit of skinny pedal? Cause pigpens mota vibrates REALLY bad at idle but smooths out perfectly above idle.
Hey if you're still trying to find one of these, there is what looks to be an old frito-lay truck for sale out on Merka Road south of the winery.
I'll be back in a few minutes...Quote:
Originally Posted by uglyota
so, twats the story?
eric's a liar and made me burn a $1 or 2$ worth of gas... I think he got the wrong street.Quote:
Originally Posted by Snatch Adams
well I saw Merka road on the same bike ride that I saw the truck...
$20 and I tell you the right one :flipoff2:
twat a doosh :flipoff2:
:laughing:Quote:
Originally Posted by Snatch Adams
so after jamming the cell phone in my helmet and trying to get voice guided directions by eric I never found it on Merka. However on my way home I took a different route and cruised right by the thing on Old reliance road.
Too bad it's a 350. It did have a kick ass kitchen in it though.
There is a old IH pickup right next to it with a full floating axle if anyone is interested.
so you found the roach coach and the plow puller.
Is it a harvester, if so I'm interested.Quote:
Originally Posted by Doug Krebs
That one never gets old :flipoff2:
Quote:
Originally Posted by Snatch Adams
it must be, he said IH. not just I.
Fags
In the new Diesel Power mag, my conversion that i want is featured in it. But its in a yj, but the fuel and other stuff i was talking about is verified.