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HEMI in NHRA T/F,F/C,TAD,TAFC
#1107340
11/04/11 11:11 PM
11/04/11 11:11 PM
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Joined: May 2005
Posts: 304
Enfield, Ct
Moe
OP
enthusiast
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OP
enthusiast
Joined: May 2005
Posts: 304
Enfield, Ct
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HEMI in NHRA T/F,F/C,TAD,TAFC. What is the reason why the HEMI is the choice of engines. It will stay together @ 8000 Hp? It has superior dentonation characteristics? Ford & GM won't work in these applications? Need a good detailed answer for the guys at work. "Google" Won't give me an answer.  THANKS!
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: Moe]
#1107341
11/05/11 07:28 AM
11/05/11 07:28 AM
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Joined: Jan 2003
Posts: 20,175
Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,175
Park Forest, IL
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Because it is the only engine allowed by the NHRA.
"Everybody funny, now you funny too."
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: Challenger 1]
#1107343
11/05/11 10:18 AM
11/05/11 10:18 AM
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Joined: Jan 2003
Posts: 11,369
NJ
rdrnr6970
Your #1 source for current events
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Your #1 source for current events
Joined: Jan 2003
Posts: 11,369
NJ
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because years ago the hemis were beating everybody...they had the most horsepower,when placed in vehicles they were the fastest.racers found out the hemispherical combustion chambers,the motor set up, in these mosters couldnt be beat! 
OWNER OF EVERYTHING FROM 1956 300 B,IMPERIAL,NEW YORKER HEMIS,AND NEW HEMI TRUCKS.....5TH GENRAMS.COM... 1969/70 ROADRUNNERS ,DARTS/CORONETS, NORTHEAST HEMI OWNERS ASSOCIATION.....WWW.PHANTASMCUDAS.COM....MOPAR FAMILY FOR 50 YEARS AND STILL GOING!MOPAR OWNER COAST TO COAST!!!!
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: rdrnr6970]
#1107344
11/05/11 10:19 AM
11/05/11 10:19 AM
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Joined: Jan 2003
Posts: 11,369
NJ
rdrnr6970
Your #1 source for current events
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Your #1 source for current events
Joined: Jan 2003
Posts: 11,369
NJ
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amd YES...HEMI motors look cool!
OWNER OF EVERYTHING FROM 1956 300 B,IMPERIAL,NEW YORKER HEMIS,AND NEW HEMI TRUCKS.....5TH GENRAMS.COM... 1969/70 ROADRUNNERS ,DARTS/CORONETS, NORTHEAST HEMI OWNERS ASSOCIATION.....WWW.PHANTASMCUDAS.COM....MOPAR FAMILY FOR 50 YEARS AND STILL GOING!MOPAR OWNER COAST TO COAST!!!!
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: rdrnr6970]
#1107345
11/05/11 10:33 AM
11/05/11 10:33 AM
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Joined: Nov 2009
Posts: 2,177
ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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I was going to say something like ,, no-one designs motors here anymore! now its built on someones computor in japan or china. same as the cars platform , car makers used to have designers, now they leave that to the jackets they wear 
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: Challenger 1]
#1107347
11/05/11 11:21 AM
11/05/11 11:21 AM
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Joined: Jan 2003
Posts: 11,369
NJ
rdrnr6970
Your #1 source for current events
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Your #1 source for current events
Joined: Jan 2003
Posts: 11,369
NJ
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OWNER OF EVERYTHING FROM 1956 300 B,IMPERIAL,NEW YORKER HEMIS,AND NEW HEMI TRUCKS.....5TH GENRAMS.COM... 1969/70 ROADRUNNERS ,DARTS/CORONETS, NORTHEAST HEMI OWNERS ASSOCIATION.....WWW.PHANTASMCUDAS.COM....MOPAR FAMILY FOR 50 YEARS AND STILL GOING!MOPAR OWNER COAST TO COAST!!!!
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: Challenger 1]
#1107348
11/05/11 11:26 AM
11/05/11 11:26 AM
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Joined: Nov 2009
Posts: 2,177
ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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We all know what the Hemi does,, but why hasn't Ford,,, Chevy,,, tried to put some type of engine that would at least compete with the Hemi?? The Hemi that is being used , is just a distant relative of the original Hemi. 
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: dennismopar73]
#1107349
11/05/11 11:44 AM
11/05/11 11:44 AM
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Joined: Jan 2003
Posts: 11,369
NJ
rdrnr6970
Your #1 source for current events
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Your #1 source for current events
Joined: Jan 2003
Posts: 11,369
NJ
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ford did try in 69 with the BOSS 429,hemi configuration.limited sales,and the expense of the motor and its development,prob led to its demise.chevy tried too,their was a smokey yunik built( i think)302?or 307?cross ram hemi,that was put in a 68/69 camaro,but never worked out.
OWNER OF EVERYTHING FROM 1956 300 B,IMPERIAL,NEW YORKER HEMIS,AND NEW HEMI TRUCKS.....5TH GENRAMS.COM... 1969/70 ROADRUNNERS ,DARTS/CORONETS, NORTHEAST HEMI OWNERS ASSOCIATION.....WWW.PHANTASMCUDAS.COM....MOPAR FAMILY FOR 50 YEARS AND STILL GOING!MOPAR OWNER COAST TO COAST!!!!
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: rdrnr6970]
#1107350
11/05/11 01:08 PM
11/05/11 01:08 PM
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Joined: Mar 2003
Posts: 4,848
Memphis
HemiRick
master
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master
Joined: Mar 2003
Posts: 4,848
Memphis
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The reason why Hemis dominate the Nitro classes is because they are the only engine with a port design good enough to keep the exhaust valves from melting. During the overlap period enough air goes thru them to cool the exhaust valve for the next stroke.
Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: MoparDan]
#1107353
11/06/11 12:37 AM
11/06/11 12:37 AM
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Joined: Jan 2003
Posts: 9,826
las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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NHRA killed the hemi in pro stock by assigning it a very uncompetitive weight break..
so with the swipe of a pen the 426 hemi was dead in pro stock...after several years of trying..all further development on the PS hemi was stopped..
Tony
70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: Moe]
#1107358
11/06/11 03:12 PM
11/06/11 03:12 PM
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Joined: Jan 2003
Posts: 25,783
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,783
Rio Linda, CA
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Quote:
HEMI in NHRA T/F,F/C,TAD,TAFC.
What is the reason why the HEMI is the choice of engines.
The Hemi is easier than others to maintain, other designs require too much time to teardown/reassemble between rounds.
The INTERNET, the MISinformation superhighway
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: John_Kunkel]
#1107359
11/06/11 03:33 PM
11/06/11 03:33 PM
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Joined: Feb 2003
Posts: 8,020
Pangaea
B5 Bee
master
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master
Joined: Feb 2003
Posts: 8,020
Pangaea
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By 1990, the 426 Hemi type motors were the only motor being used in the nitro classes for reasons given above (ease of maintainence and performance using a blower and nitro).
The 426 Hemi rule came not long after Bernstein invested in and was testing the McGee 4valve OHC motor. The Hemi only rule was to slow the rising costs of running in the nitro classes.
Best I recall, the last TF car that won a National event (Springs I think) that wasn't 392 or 426 based, was Jim Bucher's Chevy. He was an underdog favorite, ran 3 or 4 years in the early '70s on a small budget, a Chevy motor and still managed to win some rounds.
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: slantzilla]
#1107361
11/09/11 01:07 PM
11/09/11 01:07 PM
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Joined: May 2005
Posts: 304
Enfield, Ct
Moe
OP
enthusiast
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OP
enthusiast
Joined: May 2005
Posts: 304
Enfield, Ct
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Quote:
Because it is the only engine allowed by the NHRA.
Where can I find this in black & white?
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: Challenger 1]
#1107364
11/09/11 01:13 PM
11/09/11 01:13 PM
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Joined: May 2005
Posts: 304
Enfield, Ct
Moe
OP
enthusiast
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OP
enthusiast
Joined: May 2005
Posts: 304
Enfield, Ct
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Quote:
NHRA rule book, they send out new one's every year.
Thanks, I will get one!
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: slantzilla]
#1107366
11/09/11 04:30 PM
11/09/11 04:30 PM
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Joined: Mar 2007
Posts: 12,008
Finally a HUSKER again
Moparnut426
I Live Here
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I Live Here
Joined: Mar 2007
Posts: 12,008
Finally a HUSKER again
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I have also heard the Rockers on a ball stud design head is too time consuming for the quick turn arounds required is some racing. also a string deep skirt block, the crank is set deep in the block so there is a lot of meet around the mains for support.  Kasey
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: Moe]
#1107368
11/09/11 09:24 PM
11/09/11 09:24 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Quote:
Because it is the only engine allowed by the NHRA.
Where can I find this in black & white?
Your right, you won't.
I just looked at a rule book for top fuel, Any engine is permitted with some restrictions. 
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: Challenger 1]
#1107369
11/09/11 09:27 PM
11/09/11 09:27 PM
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Joined: Jan 2003
Posts: 20,175
Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,175
Park Forest, IL
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Quote:
Quote:
Quote:
Because it is the only engine allowed by the NHRA.
Where can I find this in black & white?
Your right, you won't.
I just looked at a rule book for top fuel, Any engine is permitted with some restrictions.
Well, any engine as long as the block and crank specs match a Hemi. 
"Everybody funny, now you funny too."
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: Moe]
#1107371
12/03/11 12:25 AM
12/03/11 12:25 AM
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Joined: Jul 2005
Posts: 11,632
SHELBY TWP,,MICHIGAN
72N96RR
I LOVE WEDGIES
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I LOVE WEDGIES
Joined: Jul 2005
Posts: 11,632
SHELBY TWP,,MICHIGAN
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Why is it in modern day Pro Stock the Hemi isnt getting it done...?? Those obsolete Pontiac drivers are still whooping Mopars butt in this class... I would love an explaination for this one from you experienced racers out there.. This is an original pro stock block and aluminum heads developed by Warren Johnson in 1983...Its never been in a car..It can be built between 350 and 650 cubic inches and handle 1400 hp...I stumbled upon it and snagged it for a great price... I would love to have an 83 Hurst Olds car..Kind of a tribute car to race in NPS class..A tribute to ol WJ himself..
1972 Road Runner / GTX 440 4spd Dana 3.54 Just about to turn 26K original miles..
A boat, a GMC truck, some Craftsman Tools, LOTS of Zombie Protection, and a few Goldfish..
If you love someone set them free..
If they come back it means nobody else wanted them either..!!
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: 72N96RR]
#1107372
12/03/11 12:26 AM
12/03/11 12:26 AM
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Joined: Jul 2005
Posts: 11,632
SHELBY TWP,,MICHIGAN
72N96RR
I LOVE WEDGIES
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I LOVE WEDGIES
Joined: Jul 2005
Posts: 11,632
SHELBY TWP,,MICHIGAN
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The car for it!!!
1972 Road Runner / GTX 440 4spd Dana 3.54 Just about to turn 26K original miles..
A boat, a GMC truck, some Craftsman Tools, LOTS of Zombie Protection, and a few Goldfish..
If you love someone set them free..
If they come back it means nobody else wanted them either..!!
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Re: HEMI in NHRA T/F,F/C,TAD,TAFC
[Re: Moe]
#1107373
12/03/11 02:11 PM
12/03/11 02:11 PM
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Joined: Apr 2008
Posts: 1,141
Phoenix,Az.
hemicop
super stock
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super stock
Joined: Apr 2008
Posts: 1,141
Phoenix,Az.
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Quote:
Hey, If you guys have time. The Super Stock '68 HEMI darts and 'Cuda's (SS/AA) have to follow certain rules. I need these specs for the guys @ work. so far I have;
Must use OE cast iron cylinder heads.
Must use OEM heavy K-member and & control arms.
Must not be over 426 c.i
Must use OEM size carbs.
What else am I missing?
Among other things, carbs must be stock, inake manifold must be of original design (that gets tricky!), crank, rods & pistons (I believe) must be stock weight, valve angles can't change, car must have interior--no gutting, no "cross-breeding" of engine/trans (but oddly, you can use a different rear  ). Imagine a 20-30yrear old Comp engine & that's what the S/S motors have evolved into.
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