Half-a-hemi?

rannox · Post by **rannox** » Wed Apr 25, 2007 9:09 pm

i know its somethinhg to do with the tranny, but what is it, and what does it do?

Post by **racer12306** » Wed Apr 25, 2007 9:11 pm

no, it has to do with the engine.

hemi refers to the shape of the combustion chamber. the combustion chamber is the shape of a hemisphere.

rannox · Post by **rannox** » Wed Apr 25, 2007 9:20 pm

i see, i so thought it was a tranny thing, but as normal, i was wrong... lol

MoxHair · Post by **MoxHair** » Wed Apr 25, 2007 9:24 pm

The Moden Day "Hemi" isnt as much of a "Hemi".. Hell our Neons are more "Hemi" than the "Hemi"

03wingswestR/T · Post by **03wingswestR/T** » Wed Apr 25, 2007 9:42 pm

MoxHairR/T wrote:The Moden Day "Hemi" isnt as much of a "Hemi".. Hell our Neons are more "Hemi" than the "Hemi"

how is that! the neon 4 cyl has a hemispherical head but are still no match for a 426ci hemi! those motors with stock heads and dialed in with all the stock parts can push 720hp and 700flbs all day long!

Post by **racer12306** » Wed Apr 25, 2007 9:45 pm

it doesnt matter what type of engine.

a hemispherical chamber = hemi no matter how you look at it.

are you sure about that 700hp on stock stuff. i can understand 500 - 550hp stock with proper tuning because the old 427 ZL1's were known to put out significantly more power when properly tuned

MoxHair · Post by **MoxHair** » Wed Apr 25, 2007 9:48 pm

03wingswestR/T wrote:
MoxHairR/T wrote:The Moden Day "Hemi" isnt as much of a "Hemi".. Hell our Neons are more "Hemi" than the "Hemi"
how is that! the neon 4 cyl has a hemispherical head but are still no match for a 426ci hemi! those motors with stock heads and dialed in with all the stock parts can push 720hp and 700flbs all day long!

They arent as Hemispherical as the old Hemi's.. If you open up the New 5.7 or 6.1 Hemi you'll notice that the Head off of a S4RE or D4RE or A855 is more Hemispherical.

Post by **racer12306** » Wed Apr 25, 2007 9:50 pm

it pissed off a lot of Mopar nuts that the new hemi wasnt a perfect hemisphere

03wingswestR/T · Post by **03wingswestR/T** » Wed Apr 25, 2007 9:51 pm

racer12306 wrote:it doesnt matter what type of engine.

a hemispherical chamber = hemi no matter how you look at it.

are you sure about that 700hp on stock stuff. i can understand 500 - 550hp stock with proper tuning because the old 427 ZL1's were known to put out significantly more power when properly tuned

the 426 hemi's where not a good street motor, they were hard to keep tuned! but when tuned right can and will always be the monster of all stock v8's and yes can push 650hp easy! but the only reason that the 440 six pack mopars would beat hemi cars on the street is because not alot of people can tune a hemi.

MoxHair · Post by **MoxHair** » Wed Apr 25, 2007 9:52 pm

racer12306 wrote:

it pissed off a lot of Mopar nuts that the new hemi wasnt a perfect hemisphere

Bingo Bango

Post by **racer12306** » Wed Apr 25, 2007 9:58 pm

i agree with the fact about keeping them in tune. i have heard that you drive it all week, and then give it a tune up and race it on the weekend, and by the next weekend race you would tune it up again.

im still haveing a real hard time accepting the 650+hp. they were rated at 425 stock, and were known to put out 460ish stock. but 650hp is 200hp more than stock, in stock configuration. doesnt make sense to me.

03wingswestR/T · Post by **03wingswestR/T** » Wed Apr 25, 2007 10:01 pm

racer12306 wrote:i agree with the fact about keeping them in tune. i have heard that you drive it all week, and then give it a tune up and race it on the weekend, and by the next weekend race you would tune it up again.

im still haveing a real hard time accepting the 650+hp. they were rated at 425 stock, and were known to put out 460ish stock. but 650hp is 200hp more than stock, in stock configuration. doesnt make sense to me.

well for insurance purposes the would rate the horsepower lower, alot lower on hemi cars

Post by **racer12306** » Wed Apr 25, 2007 10:03 pm

i understand that. what insurance co would want to insure a car that came with that kind of power stock.

i looked over at allpar and there was a bone stock hemi that they dyno'd at 463 corrected hp. your saying that they can take that stock hemi and get another 200hp with only tuning. i still dont believe it.

03blackrt · Post by **03blackrt** » Wed Apr 25, 2007 10:04 pm

03wingswestR/T · Post by **03wingswestR/T** » Wed Apr 25, 2007 10:08 pm

racer12306 wrote:i understand that. what insurance co would want to insure a car that came with that kind of power stock.

i looked over at allpar and there was a bone stock hemi that they dyno'd at 463 corrected hp. your saying that they can take that stock hemi and get another 200hp with only tuning. i still dont believe it.

thats what i heard! but i know the go 500-550hp stock

Post by **racer12306** » Wed Apr 25, 2007 10:10 pm

now you are bugging me.

you start at 720, then back down to 650 and now you are down to 500-550hp.

i can totally believe an additional 50 - 100hp, with the carb tuned right, and a set of headers. that is all the ZL1 needed.

03wingswestR/T · Post by **03wingswestR/T** » Wed Apr 25, 2007 10:17 pm

well i know that 550hp for sure! i have watched diffrent things and one guy said with the proper tunning that a 426 hemi can push out 700hp

hemi http://www.youtube.com/watch?v=V_j7_jo6NUA

MoparNeonMan · Post by **MoparNeonMan** » Thu Apr 26, 2007 2:20 am

03wingswestR/T wrote: http://www.youtube.com/watch?v=V_j7_jo6NUA

TMO racing
West Coast Hemis

Dude your a total idiot if you think that thing is stock

03wingswestR/T · Post by **03wingswestR/T** » Thu Apr 26, 2007 5:58 am

no its not stock but that things got power!

Post by **racer12306** » Thu Apr 26, 2007 10:29 am

yeah, that is a SS/AA car. those are the about the baddest 426 hemis out there.

Mookinator · Post by **Mookinator** » Thu Apr 26, 2007 10:57 am

racer12306 wrote:im still haveing a real hard time accepting the 650+hp. they were rated at 425 stock, and were known to put out 460ish stock. but 650hp is 200hp more than stock, in stock configuration. doesnt make sense to me.

the 600Hp was true out of a stock HEMI back in the 1970s. but it was on race fuel, not pump gas. it was also the reason the engine was Banned from NASCAR. teams would take the stock HEMI's, retune them for race fuel and get 600+wHP out of them. but you also have to remember that this was 600 1970's HP, that was measured differently. it's prolly closer to 550 2007 HP. still nothing to sneeze at but you'll never see 600HP out of a stock HEMI engine on pump gas today.

now 1000wHP out of a 426 after mods on pump gas today? that's not uncommon.

~Mookie

Post by **racer12306** » Thu Apr 26, 2007 11:02 am

that makes sense, thanks mookie

TNK · Post by **TNK** » Thu Apr 26, 2007 11:14 pm

ok. since i knwo what the OP is REALLY talkign about.....

the Half-A-Hemi you speak of when referring to the tranny, is the worthless shift mod that can be done to the 00-01 3 speed trannys.

all it did for me, was throw a CEL and cause my gas mileage to go to absolute SHIT. dont bother.

Post by **racer12306** » Thu Apr 26, 2007 11:19 pm

i wondered why that was posted in the drivetrain section

rannox · Post by **rannox** » Thu Apr 26, 2007 11:29 pm

TNK wrote:ok. since i knwo what the OP is REALLY talkign about.....

the Half-A-Hemi you speak of when referring to the tranny, is the worthless shift mod that can be done to the 00-01 3 speed trannys.

all it did for me, was throw a CEL and cause my gas mileage to go to absolute SHIT. dont bother.

I knew it! and u all made me feel stupid

Post by **racer12306** » Thu Apr 26, 2007 11:36 pm

well now you know what both meanings of half a hemi is

Mookinator · Post by **Mookinator** » Fri Apr 27, 2007 7:57 am

TNK wrote:ok. since i knwo what the OP is REALLY talkign about.....

the Half-A-Hemi you speak of when referring to the tranny, is the worthless shift mod that can be done to the 00-01 3 speed trannys.

all it did for me, was throw a CEL and cause my gas mileage to go to absolute SHIT. dont bother.

da hell?

~Mookie