V6 vs slant 6

[TK]

wich can make more power, and why

[dwc43]

V6 hands down. 318 bore and a stronger block. Less crank flex. Shorter stroke for higher rpm. Better breathing heads. Better fuel distribution. Better intakes and headers. Lighter pistons and rods.Better oiling system. Someone on here in circle track has one with a modded W2 head with 4 bbl. for oval use.

[dwc43]

More performance parts availabloe for the V6 today as compared to the slant.

[TK]

i disagree, v6 has a balance problem, and crank flex????? cmon, doesnt the slant have more main bearings and no balance problem! and, it has longer con rods, does it not? so, who can port a slant to death?? whoever can do that can beat the sht out of a V

[Stoga]

For what it's worth, I tore the doors clean off of a friend's mid 70's Mustang II coupe with a V6, with my old 64 Valiant 4 speed convertible. It was even a 170, the original 225 was long gone by the time I got it...
He ran his mouth until I said ok, got a nice cold 12 pack for my efforts!
Now against a modern Mopar V6, that may be another ball game.

[TK]

yup, thats why the old work truck engines were V, right?? NOT, a inline makes more torque. GMC made V6 truck engines for a while, they determined that the vibrated too much for a severe service engine (amongst other problems) how can you balance a V6 and make it run smooth, ford cant, gm cant, and either can dodge. oh, theres a guy i know circle tracking a slant against 360 and down V8's, along with a 300 six ford, both of those sixes go just as good as the V8's on a 3/8 mile dirt track. doesnt a slant have a 7 inch rod?? or close to it??

[Dick]

And how about some of those /6s from down under? Don't they have a hemi head of a sort? I have read that they really smoke.

[TK]

yeah, mad max mobiles! "look at the blower max, the blower!!"

[custom880]

Not really sure but I think the times in the Slant six racing should be some indication. Arent they turning low 11's? Pretty fast.

[dwc43]

Originally Posted by dodgetkboy78

yeah, mad max mobiles! "look at the blower max, the blower!!"

They make b&m blowers for the V6 too and nitrous too.

[TK]

how come they didnt make a v12 out of em, now thatd be cool

[webslinger60]

Back to the original question, Are you asking for a comparison of the Slant six to the LA-style 239 V6, or In-line to V-style in general?

In general, it’s apples to oranges. In-line engines usually produce more low-end power or torque per cu in. But V engines can produce more hp as the rpms rise. Many big rigs trucks use huge-inch in-line sixes.
Hemis & 440s make a lot of tourqe too, but only because the cu in volume is so large.

A simple example would be a two-man treesaw. If both guys were on the same side, they could apply more force to each cut-stroke, but it would take longer. With one guy on each side, alternately pulling, theyd apply less force per cut-stroke, but could cut faster.

Yes there were some fast straight sixes, in old Jags, Triumphs, Datsun Z, Jeep4.0, etc. (GM recently went back to a straight six for their SUVs) But these are exceptions.

Now if you’re comparing a 225 Slantsix to a 239 LA-based V6, all of the above applies, with some other considerations. The Slantsix does have a beefier bottom end, will handle more abuse and likely outlive the 239. But it will never outrev the 239. So with the right cam & flow modifications, the 239 can potentially produce more power, but higher-up in the rpm band. Also as was mentioned, there are a lot more effective and various performance parts options for the 239.

The reason the 170 out ran the Ford in the other post was probably due to it short stroke. As in individual exception, the 170 can rev much higher than other sixes.
BTW- With an aggressive cam, a 170 will actually be faster than a 225, in a light car with the right gears, even though it’s 55 inches small

[TK]

so, you think the slant makes more torque and power on the low end, but the V will outrev/ make more HP. it makes since, but isnt torque what hauls a 100,000 pound truck up a 2% grade at 1500 rpm holding 50 mph? ( a 475hp cat 14.6 L makes 1800 ft lbs of torque) so, in a hevier vehicle, the slant should go faster, if its puttin gout the same hp as the V. do they make a blower for a slant 6, my project duster still has a healthy one in it, HMMMMMMMMMMMMMMMMMMMM? do they mke goodygoody heads for the slant? i bet the right person could get one to twist 6500 (maybe me)

[dschumers]

Originally Posted by webslinger60

The reason the 170 out ran the Ford in the other post was probably due to it short stroke. As in individual exception, the 170 can rev much higher than other sixes.

A 170 will not rev a whole lot higher than a 225. It takes a lot of work to make a 170 turn 7000. The same work will get a 225 that will turn 6700 and make gobs more power. The NASCAR 170's redlined around 5700.

BTW- With an aggressive cam, a 170 will actually be faster than a 225, in a light car with the right gears, even though it’s 55 inches smaller.

Again I say bullshyt. I have owned and raced both. Ain't no camshaft and gear that will make a 170 outrun a comparable 225. Only way to make a 170 run is joos. Take a walk around the pits at a Slant race and count all the fast guys running a 170. You won't have to unfold many fingers.


Just for the record, I have nothing against 170's. However, when you have already handicapped yourself by choosing a Slant, choosing a little one makes even less sense. :flame

[TK]

12.92@102??????????????????, told you guys the slant id kick the V's a, uh butt! damn man, is this thing streetable?

[dschumers]

Originally Posted by dodgetkboy78

12.92@102??????????????????, told you guys the slant id kick the V's a, uh butt! damn man, is this thing streetable?

Yes, the car is a street car and has even been driven the 80 miles home from the track. It will run 14:50's@92 on motor alone.

[Rug_Trucker]

Originally Posted by Dick

And how about some of those /6s from down under? Don't they have a hemi head of a sort? I have read that they really smoke.

Completely different engine. Head, block, doesn't lean either! Some of them make 300hp factory stock!! They call them the Hemi 6. Why I don't have a clue!

[Rust collector]

Those are funny.
Not slanted, and not hemi.
I don´t know why people mix them into /6 stuff, as they have nothing in common.
Not much anyway

[Tarrbabe]

Didn't GM just revive their old straight 6 ( with modern upgrades ) to put into their SUV's? 300 hp and great tq.

[Rust collector]

Ummmm No!
They made a NEW straight six...and that is about the only thing common with the old ones, six holes inline.

[Tarrbabe]

It is the same old engine design that has been upgraded to accept the roller cam ans such. Several car mags even did stories on it's re-incarnation.

[Rug_Trucker]

My ex had a 2001 Silverado that had the 4.3 V-6, 5 speed. No low end, but would run at 90mph and faster all day long getting 21mpg. Good truck!!

[TK]

Originally Posted by Tarrbabe

It is the same old engine design that has been upgraded to accept the roller cam ans such. Several car mags even did stories on it's re-incarnation.

um, wich one? 250? 292? 235? 235 was used by yota, they just changed it enough so nothing would inter change

[Tarrbabe]

It was the old 235 design. As I remember the 292 was a cousin.

[RoadRaceJosh]

Originally Posted by dodgetkboy78

i disagree, v6 has a balance problem, and crank flex????? cmon, doesnt the slant have more main bearings and no balance problem! and, it has longer con rods, does it not? so, who can port a slant to death?? whoever can do that can beat the sht out of a V

4 main bearings in a slant 6 and a very much longer crank than a 239 V6 with 4 mains. Yes, inline 6s have great balance, but the small bore of the slant 6 leaves you with much less valve area compared to the LA based V6.

60° V6s have as good of balance as a 90° V8. The 239 Mopar V6 has split crank pins, but not enough to make it completely even fire. The crank pins are split 22° and 30° is needed in a 90° V. I modified a slant 6 reluctor so the timing would be right on my hopped up 239. Glad I have a friend with a mill and a rotary table!

One big problem with spinning a slant 6 fast is not the crank, but the oil pump drive gears which tend to self destruct so there is more expense in geting the oiling right.

The GMC V6 truck engines went away as they were expensive to build and thirsty compared to the Chevrolet

[Rug_Trucker]

I thought 235 was a AMC? You sure it was a Chebbie?

[Rust collector]

So, can I take the head off a new chevy 6 and put it on a 235?
Or any other good parts?

[slantvaliant]

Chevy made a 235 "stovebolt" six, that was replaced about '63 with a 230.