backnblack

I think if anyone is serious about this to contact the people at Dart heads.
http://www.dartheads.com/index.php
If nothing else go to the web site and watch the video .
I have met and done work with ( Dave T ) the president of the company , they are a customer of mine and they know what they are doing.

Regards
Matt

backnblack

AMEN BROTHER !!!!

RyanPerrella

I give up, maybe i just dont appreciate a 50 year old engine.

Anyway, i'm glad you guys like your Hemi's, it would be UNPATRIOTIC if you didn't! I'll just be unpatriotic, i have no appreciation for them and am fine with that.

As for Viper's besting Porsche's, shouldn't an 8.0L V10 produce more power then a 3.6 or 3.8L Flat 6? I would hope so. Not sure thats a fair comparison. But whatever, i'm done talking about Hemi's i hate to even type it H........E..........M........ .........Sorry I just cant do it anymore.

BC

What does the chamber of a Hemi look like? I assume it has the plug in the middle.

RyanPerrella

plug should be on the side, like 2V 911's

Hemispherical head design isnt exclusive to Chrysler. Porsche used it from 65 to 89 in single plug design in the 911 and in 89-96 in twin plug versions in the 964 and 993.

largecar379

Thank you........very much!

(wondered how long it would be before you "hammered" in on this.......)


--Russ

6.0-928S

OE street heads have one plug in the center. Race heads have two plugs in the center.

Hammer

largecar379

As I said, the '50s Hemi's were true hemispherical chambers, the '60s were not (the exhaust valves were canted in 10%) and the very late 2000's hemi's have a dimple in the chamber (for better fuel economy).

Porsche 928 32V heads are "close" to being hemispherical (not a true hemispherical chamber), but they did not appear until 35 years after Chrysler came out with their first hemi's...... Is it cutting edge technology? maybe, maybe not.....but the production dates speak for themselves.

As for the Viper/Porsche V10 versus flat 6 comparison, the Porsche's were turbocharged to make them competitive.....antiquated 2 valve pushrod V10 monster torque motors versus 4 valve overhead cam high rpm turbo-ed flat sixes. Dodge used nothing more than adding 2 cylinders to an engine that originally started use in the early '60s to get to 500hp/500 ftlbs torque, and Porsche had to result to 4V per cylinder/twin turbo/intercooled to even get close to the magic 500 number.......

The new Challenger (I know you can't stand this, but...) even has Brembo 4 piston disc brakes all around....bigger than what 928 came with. Why? Partly because of sourcing, partly because of Viper's braking needs (an easy reference), partly because of the 4100 lbs weight of the Challenger, and partly because of Brembo's reputation of building very good braking systems.

Weight per car difference (Porsche versus Challenger) is significant, about 500 lbs more for the Dodge, but if you look at the published quarter mile times the weight is not much of a detractor. The torque and hp of the 6.1L HEMI more than handles task of getting it moving. The problem Dodge had in keeping the weight off was side impact reg's. When they pirated the body from the 300 series platform and lost two doors and the "B" pillar, more steel had to be incorporated into the sides to pass the reg's....Rumoured top speed for the Dodge is upwards of 175mph, which isn't too bad for pushing a brick through that much air.....It may not have the top speed of a 997, but who and where are you going to drive one that fast (reality check, please...).


All this, and the Dodge costs 1/3 the price of a new twin turbo 997.


Exotics are fine, if you've got the money and can put up with their eccentricities.

American Iron may appear to be heavy, overweight, slugs......but, for the money there are many examples of domestic iron that can and do perform well against their foreign competition (for less money). And buying American keeps Americans employed.

Everyone has a favorite.....I have many favorites. I don't particularly like Ford's.....but give me a '69 Boss 429 Mustang and I'd be happy as pig in sh**.........Don't knock something until you really have experienced the other side.


And......back to my paint removal job-----


--Russ

largecar379

sorry......but not a true hemispherical chamber. Porsche heads use more of a shallow bowl chamber.

--Russ

6.0-928S

Ahhhh................bombs bursting in air, where's my fife & drum?

Hammer

svp928

Our heads, like most 4-valve heads, are a "pent-roof" design- basically like the design Ricardo came up with in the early 1900's... so, not much in the mechanical world is really 'new'- somebody already did most of it a century ago. Including the hemispherical chamber design...
FWIW..

As far as old sh** goes, my personal favorite was a 70 Chevelle SS with a nicely built 427 in it. Still miss that car... I figure most of us who are old enough to have grown up with those cars still have soft spot for them, even if they really were piles of crap...we had a lot of fun with them, and some pretty damn fast!

RyanPerrella

Then again you can always turn your 928 into a Viper by adding, oh lets see, sidepipes maybe? To each his own, obviously you LOVE your american cars. Again, whatever works for YOU.

I dont know when the viper ever raced Porsche in LeMans, the only thing i can think of is GT2 and if i have to i will research this but i really doubt Dodge was the better car in Class if they ever raced against a factory Porsche. I know Porsche Raced GT1 in the mid to late 90's actually i think Porsche won GT1 in 98, i think 1996 The McLaren F1 was the top dog. I know Viper isn't in GT1 and its too big for GT3 so that leaves GT2 which yes Porsche would have been using a 3.6L turbo car. I will have to look up the statistics from the seasons if i must but I would be shocked if the Viper beat a factory Porsche GT2 more then once in a race. Seriously, that would shock me, If you can show me such statistics then that would open my eyes to these giant iron overweight pigs, I still think they are crap, but winning is winning and i cant argue with that.

Let me see some statistics from head to head GT2 races in the late 90's. I'm all ears.

BC

I would take Greg Brown telling me I don't know where the pointy end of the screwdriver is over this debate.

RyanPerrella

in fairness to your thread, i have the rest of this crap set on ignore.

Back to S4 porting

Sorry for playing with the remote Brendan, i guess i changed the channel.

largecar379

WELL, at least you didn't threaten me with a lawsuit!!!


--Russ