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"!!!:popcorn:

[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.....
http://img45.imageshack.us/img45/9048/img02067le.jpg

:thumbs_u: :wink: :thumbs_u:

[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"!!!:popcorn:

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... :roll:

[crhemi]

:popcorn: :itchy-scr :doh: :boxing: :magburno:

[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"!!! :popcorn:

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.:pepper:

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












A "HEMI"!!!:popcorn:[/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!
:deadhors:
this is gonna be fun to sit back and read!!! :popcorn: +:beerchug: =:pepper:

[SeadooSandi]

:popcorn: 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.

[boggart]

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"!!!:popcorn:

You seem suprised for some reason. We've been telling you V8 guys that for a year...

[ratman1648]

You seem suprised for some reason. We've been telling you V8 guys that for a year...
I just had to find out for myself

[ratman1648]

:popcorn: This could become abyss worthy....
why is that?

[cadzilla74]

Powerwagon896 has the best explanation so far, thx. It is true none of these motors have the original domed hemi-head design from the 60's. But the valve alignment and actuation are distinctive from other motors and this is a shared configuration in both the 5.7 and 3.5 from what I have read. But I don't know for sure about the 6.1 (or crate motor 6.4). I'm pretty sure the 2.7 does not have the same setup. Correct me please if I'm wrong, I have picked up this info from a variety of sources that may not be correct.

[PowerWagon896]

Powerwagon896 has the best explanation so far, thx. It is true none of these motors have the original domed hemi-head design from the 60's. But the valve alignment and actuation are distinctive from other motors and this is a shared configuration in both the 5.7 and 3.5 from what I have read. But I don't know for sure about the 6.1 (or crate motor 6.4). I'm pretty sure the 2.7 does not have the same setup. Correct me please if I'm wrong, I have picked up this info from a variety of sources that may not be correct.

The 6.1 is EXACTLY the same configuration as the 5.7, just bigger valves etc. In fact, some of the Ram guys have been swapping 6.1 heads and manifolds onto the 5.7.

[DirtyOM]

:zzz: :zzz: :zzz: :zzz: :zzz: :baby: :baby: :blam: :blam: :blam::doh:

[SeadooSandi]

why is that?

These type threads always to seem to end up in the abyss..nothing personal, just the topic. :grin:

[blackmagsxt]

To someone who does not know alot about this type of thing...this has been very interesting...so my SXT has a "baby Hemi" ??????? I need a Baby Hemi sticker....LOL

[Fondy]

so to bring this to a close can the V6 hemi beat the V8 hemi stock........no ok next question:popcorn: LOL sorry

[Brilliant R/T]

:popcorn: :beerchug: :beerchug: :huddle: :lightsab: :boxing: :itchy-scr

I don't know if I can keep drinking this much.

[bipto]

so to bring this to a close can the V6 hemi beat the V8 hemi stock........no ok next question:popcorn: LOL sorry
THIS is why these threads end up in the Abyss... :roll:

[ratman1648]

this was just a tidbit of info I thought I might share with you guys

[KGBPro]

my buddy toyota corrolas gota hemi too!!! and its a 4 banger LOL

[Bandit]

I just had to find out for myself

If I told you that slamming a door on your penis would cause pain and disfigurement... would you still need to "find out for yourself"?

LMAO

Sorry, just had to see how much this thread could handle before it gets Abyss'ed.

[blackmagsxt]

Funny how some of you guys....don't have any positives to add when its not one of the "chosen" around here giving input......always thinking if it has been discussed somewhere before everyone saw it and it should go to the abyss.
:not_worth

[COLORADOMAGNUM]

This thread is giving me a HEMI-roid...LOL

[ratman1648]

Funny how some of you guys....don't have any positives to add when its not one of the "chosen" around here giving input......always thinking if it has been discussed somewhere before everyone saw it and it should go to the abyss.
:not_worth
yeah I seem to be unanoumously disliked around here. I have heard both that it is and isn't a "HEMI" design so I got another opinion from someone else and suddenly my thread is abyss bound because some can't be more productive with their posts

[bipto]

Funny how some of you guys....don't have any positives to add when its not one of the "chosen" around here giving input......always thinking if it has been discussed somewhere before everyone saw it and it should go to the abyss.
:not_worth
blackmagsxt, I couldn't care less who brings up a topic. If I feel I have something worthwhile (whether it be info, humor, constuctive criticism, etc.) to add to a thread, I will do so, and if I do not, I will not.

And if you go back and read my posts I never recommended that this thread be sent to the Abyss - I merely suggested that this one would probably get there based on the fate of past threads in which we have beaten similar topics to death. This particular topic, I must confess, is one that I am particularly un-fond of. Though there is plenty of "positive" info to be exchanged on the performance differences between combustion chamber shapes, inevitably certain players here never fail to turn topics like this in to a "mine-is-better-than-yours," Hemi vs. V6 insult exchange which usually dominates the thread until it goes down in flames.

Forgive me for wanting to save us all a bit of aggravation. By all means, carry on...

[ratman1648]

blackmagsxt, I couldn't care less who brings up a topic. If I feel I have something worthwhile (whether it be info, humor, constuctive criticism, etc.) to add to a thread, I will do so, and if I do not, I will not.

And if you go back and read my posts I never recommended that this thread be sent to the Abyss - I merely suggested that this one would probably get there based on the fate of past threads in which we have beaten similar topics to death. This particular topic, I must confess, is one that I am particularly un-fond of. Though there is plenty of "positive" info to be exchanged on the performance differences between combustion chamber shapes, inevitably certain players here never fail to turn topics like this in to a "mine-is-better-than-yours," Hemi vs. V6 insult exchange which usually dominates the thread until it goes down in flames.

Forgive me for wanting to save us all a bit of aggravation. By all means, carry on...
whoa taking that just A LITTLE too personal there don't you think? Pretty sure that wasn't a finger pointing at you (unless you have a guilty conceince).

If we can keep it to comments like "they are two different engines with the same design" and no "my dad can beat up your dad" then we should be fine (famous last words):beerchug:

[bipto]

whoa taking that just A LITTLE too personal there don't you think? Pretty sure that wasn't a finger pointing at you (unless you have a guilty conceince).
Guess I read it differently.

If we can keep it to comments like "they are two different engines with the same design" and no "my dad can beat up your dad" then we should be fine (famous last words):beerchug:
I couldn't agree more. The point that I was trying to make from my very first post in this thread, is that most times, it seems, we can't.

LOL - as it looks like I'm risking destroying a thread with good intentions, I think I'm gonna split on this one. I can see I'm doing more harm than good.

[Fondy]

Sorry hope this thread lasts..............this is the last i say on this one.

[pigpen]

WOOW CAN'T WE JUST FIND A FREAKING ANSWER. Were all grown ups here how about we act are age, and no more picking SE OR the SXT model were all friends here.

So lets start again about the hemi
V6 Maybe?
V8 Kinda?

[Trouble]

Ok since it continues... The hemispherical combustion chamber makes tons of sense. At the same time, concepts that were established with the Univac made tons of sense for computing. That doesn't mean that science and engineering have stopped because some magical goal has been reached. There are pros and cons to everything and by utilizing good solid engineering (and god bless those guys before computer simulations that had to depend on their brains and use definitive 'real world' data!) Give it up....There are very smart dudes working to make better internal combustion engines that last to one's expectations and of course they're going to utilize concepts that work for power while at the same time meeting fuel economy, emissions and reliability expectations provided to them by the guys with the money AND what's expected by the general consumer. It saddens me that we're still such luddites and even discussing the benefits of this utilizing internal combustion because it's far from ideal. Ma Mopar patented/copyrighted the phrase 'hemi' and came up with an application for consumer automobiles where it worked in certain situations. Thats about it. 'Hemi' isn't all that special beyond marketing these days. If it were, obviously EVERY motor would use the exact same design that was invented way back when. It's a welcome engineering feat that has been expanded upon.
-Trouble

[Thirsty]

Thanks for that Trouble. I'm sure this has been talked about alot but for us relative new-comers the topic may have not been something we needed or wanted to know about (ie: doing searches on that subject) but when it comes up we're interested.

I'd love to see some pictures showing what hemi and pent-roof actually look like.

[NC-SXT]

http://www.aa1car.com/library/2004/elements/110422a.gifhow about a picture. Its worth a 1000 post

http://i6.photobucket.com/albums/y202/fdwitte/hemi.jpg
5.7 hemi

[KGBPro]

heres an idea.....how about a hemi v6 and a hemi v8 race....

Hahah stupidity
LOL
just wanted to get in there

[Thirsty]

This may sound cruel, but my V6 is just outside the door and ready to run; where's yours?

Hahah stupidity
LOL
just wanted to get in there

[KGBPro]

This may sound cruel, but my V6 is just outside the door and ready to run; where's yours?

Hahah stupidity
LOL
just wanted to get in there
at the shop finalizing my suicide doors and putting a new coat of a different black paint then having an air ride suspension put on....didint you know?:pepper:

[Thirsty]

Absolutely, gave you a bean on that.

[KGBPro]

Absolutely, gave you a bean on that.aww thanx its goin in the booth tomorrow takin pics friday.....:beerchug:

[Thirsty]

at the shop finalizing my suicide doors and putting a new coat of a different black paint then having an air ride suspension put on....didint you know?:pepper:

Yup, sure did know that. I've read all the posts. I read your post as demeaning the litte V6 Hemi versus the V8 Hemi.

I never figured my little V6 was anything more than that.