HEMIs

[ratman1648]

Just for the record, I asked my local service tech for the truth....
The 3.5L V6(I didn't ask about the 2.7L) is....dare I say it.....












A "HEMI"!!!

[mikoazca]

So is the 2.7 and it has a timing chain, whereas the 3.5 has a belt.

[Aikidoka]

This pic says it all.....

[Alfa Charger]

Just for the record, I asked my local service tech for the truth....
The 3.5L V6(I didn't ask about the 2.7L) is....dare I say it.....
A "HEMI"!!!

Sorry, the V6 engines are not Hemi's as in Hemispherical Head. The 3.5L (I don't know on the 2.7L) are the much better Pent Roof, 4 Valve per cylinder head. Breathes much better than any Hemi head engine ever will.

[ratman1648]

Sorry, the V6 engines are not Hemi's as in Hemispherical Head. The 3.5L (I don't know on the 2.7L) are the much better Pent Roof, 4 Valve per cylinder head. Breathes much better than any Hemi head engine ever will.

So you are going to argue with someone who pulls these things apart for a living?

[desquirrel]

Sure, if the idiot who pulls them apart for a living is wrong.

[bipto]

Here we go again. We have this argument with amazing regularity...

[crhemi]

[PowerWagon896]

Just for the record, I asked my local service tech for the truth....
The 3.5L V6(I didn't ask about the 2.7L) is....dare I say it.....


A "HEMI"!!!

As is every Harley Davidson OHV engine prior to the "Evolution" engine.

I have an 86 cu in "64" Panhead.

I also have 5 Hemi Head 4 stroke Model arcraft engines ranging from a .91 Cu in single, 1 3/4 HP, (2) 1.5 cu singles, in 2.5 HP, a 1.8 cu in single, 2.8 HP and a 3.0 cu in horizontally opposed twim with dual carbs @ 4.8 HP.


The twin weighs 64 ounces for a HP/weight ration of 1.2 HP/pound and 96 HP per liter (1.6 HP per cu in) The .91 puts out 115.38 HP per liter. (1.9 HP per cu in.

Compare those ratios to the SRT 8. 69.67 HP per liter (1.14 HP per cu in)












A "HEMI"!!![/quote]

[Super T]

Look at a "hemi" head from the 70's, and look at one off a new 5.7. The new ones are faceted. Not a true "hemi"... but pretty much all the "hemi" name means is that it's smooth. There won't be much performance difference between the two designs.

[STAGE 3 R/T]

sorry had to do this!

this is gonna be fun to sit back and read!!! + =

[SeadooSandi]

This could become abyss worthy....

[ASU_Magnum]

lol the 3.5 is no more a hemi than the 5.7

neither of them are "true" hemis. more like semi-hemi's lol

its all marketing.

[LouieLouie]

So, if I understand correctly, our V6 is as much of a "Hemi" as the V8 is - but neither has the smooth hemispherical combustion chamber as the 70's Hemi? And a dumb question...what shape is the combustion chamber of, say, a Chevy V8?

[PowerWagon896]

So, if I understand correctly, our V6 is as much of a "Hemi" as the V8 is - but neither has the smooth hemispherical combustion chamber as the 70's Hemi? And a dumb question...what shape is the combustion chamber of, say, a Chevy V8?

The 1st gen Chevy "small block" had all of the valves @ the same angle, the big blocks had slighty different angles to them when comparing the intake to the exhaust. Both engines have the valves in a single row situated "longitudenally", (from front to rear) although in the case of the big block, it would be a staggered row. The new LS1/LS2 chevy engines are similar. The HEMI/pent roof, both old and new, have the Intake and exhaust vales located "laterally", as in next to each other in a line that is perpindicular to the crank centerline. They are @ different angles to each other and each has the stem canted towards the in/ex ports. Looking @ a cross section of the cylinder/valve relationship from the front of the engine, think of a triangle with the top of the bore as the base and the angle of the valves as the other 2 equal sides. This allows 2 things, a larger valve for a given bore size and a staighter, more direct port path to the combustion chamber. Both equal more power potential.