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3600-3700 lbs car to run 9.50's?
#266160
03/25/09 03:57 PM
03/25/09 03:57 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
OP
master
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OP
master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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What does it take to run 9.50-9.60's range with a car in the 3600-3700 lbs? Couple of buddies was wondering what E/T expectations I have for the car. Surly this Hemi will squeeze out 750HP.
-572 inch
-12.5:1 compression
-MP Cross Ram
-CNC ported Hemi heads flow 458CFM+
-Solid flat tappet with .700 lift and 280+ dur @50
Loose converter, 4.88 Dana gears, leaf springs, and cal tracks. 14x32 slicks.
What a ya think?
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: 3600-3700 lbs car to run 9.50's?
[Re: Bob_Coomer]
#266163
03/25/09 04:47 PM
03/25/09 04:47 PM
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Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
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You should easily run 9.50s w/ that combo.  CHIP
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: 3600-3700 lbs car to run 9.50's?
[Re: Bob_Coomer]
#266164
03/25/09 04:59 PM
03/25/09 04:59 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
Quote:
About 850 to get 9.50
Thanks
Mr-P
I just don't think this engine will make 850, it might make on the high side of 750+ But, I have little Hemi experience. I know what it takes to make 850 and this one doesn't have it....
If it had a solid roller, and sheet metal intake, like off a SS car. I know it would make 50-75+HP over the configuration I will be running at first..
But I have been known to get serious with engines in the past. Never bothered me to take one apart for no real apparent reason.
MY LAST HEMI BUILD WAS VERY CLOSE TO THAT AND YOUR HEADS FLOWED WAY MORE THAN MINE.581 CI 11.8 compression MP aluminum heads flowed 378 cfm with a .750 roller cam made 812 hp with mp hemi crossram. the head porting was horrible.
i switched out the heads for the indy hemi heads and will find out shortly what this new combo should make.
i think your heads will help you alot and you will be surprised on your power.
going 9.50's i think you will be just shy of that.
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Re: 3600-3700 lbs car to run 9.50's?
[Re: Bob_Coomer]
#266165
03/25/09 05:13 PM
03/25/09 05:13 PM
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Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
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Mine is 11:1 compression for pump gas, heads flow 430 cfm on the intake, cam is a roller but with similar duration (mild grind for street durability), and a single dominator on the Barton cast manifold. Performance in my sig. CHIP
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: 3600-3700 lbs car to run 9.50's?
[Re: an8sec70cuda]
#266166
03/25/09 07:30 PM
03/25/09 07:30 PM
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Joined: Dec 2005
Posts: 293
Kansas City Metro
mbogina
enthusiast
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enthusiast
Joined: Dec 2005
Posts: 293
Kansas City Metro
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The last NSS 572 I built was 12 to 1 comp., solid roller, MP crossram, 110M alum heads that flow 400, made 925HP, 740 TQ
Be a Rebel- Break the Laws of Physics!
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Re: 3600-3700 lbs car to run 9.50's?
[Re: Bob_Coomer]
#266171
03/26/09 09:37 AM
03/26/09 09:37 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
What does it take to run 9.50-9.60's range with a car in the 3600-3700 lbs? Couple of buddies was wondering what E/T expectations I have for the car. Surly this Hemi will squeeze out 750HP.
-572 inch
-12.5:1 compression
-MP Cross Ram
-CNC ported Hemi heads flow 458CFM+
-Solid flat tappet with .700 lift and 280+ dur @50
Loose converter, 4.88 Dana gears, leaf springs, and cal tracks. 14x32 slicks.
What a ya think?
I have a simple question for ya:
Why the heck run a flat tappet cam?  You got all that money tied up in a killer Hemi, and you gonna run a $50 camshaft? 
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Re: 3600-3700 lbs car to run 9.50's?
[Re: Bubba]
#266173
03/26/09 10:22 AM
03/26/09 10:22 AM
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Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
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Quote:
WOW, You guys got lotsa Cubes and killer head flow numbers. I'ld figure most of you Hemi guys would be laying down some seriously LOW 9's.. 
Mine as well as 572charger's motors are low compression and are on the tame side as far as camshafts and such to maintain streetability. With a more race oriented setup they would be running much faster. I know I made quite a bit of compromises with my build to keep it street friendly. CHIP
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: 3600-3700 lbs car to run 9.50's?
[Re: an8sec70cuda]
#266174
03/26/09 11:05 AM
03/26/09 11:05 AM
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Joined: Jan 2003
Posts: 2,877
SE Nunya
Bubba
master
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master
Joined: Jan 2003
Posts: 2,877
SE Nunya
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I understand Chip, I was just looking at the numbers. Jim's Charger for example: Hemi / Wedge HIS 3885# Mine 3640# = 245# COMP 11.7 - 13.9 = 2.2p Cams Pretty darn close. Heads 449 - 366 = 83CFM CID 606 - 512 = 94CI Gears 4.88 - 4.10 suspension Pretty much the same. Tires ??? - 10.5" ET 9.60 - 9.55 2 Points of Compression and a Diet and his hemi is in the 8's ????? or take away 94Cubes and 83 CFM and he could be in the 9.XX's ?????? I'm confused now... What was your setup? 
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Re: 3600-3700 lbs car to run 9.50's?
[Re: Bubba]
#266175
03/26/09 11:23 AM
03/26/09 11:23 AM
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Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
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Quote:
I understand Chip, I was just looking at the numbers.
Jim's Charger for example:
Hemi / Wedge
HIS 3885# Mine 3640# = 245#
COMP 11.7 - 13.9 = 2.2p
Cams Pretty darn close.
Heads 449 - 366 = 83CFM
CID 606 - 512 = 94CI
Gears 4.88 - 4.10
suspension Pretty much the same.
Tires ??? - 10.5"
ET 9.60 - 9.55
2 Points of Compression and a Diet and his hemi is in the 8's ?????
or take away 94Cubes and 83 CFM and he could be in the 9.XX's ??????
I'm confused now... What was your setup?
Mine---yours
3800---3640 = 160#
11:1---13.9:1 = 2.9 points
276/284 at fifty, .672"/.651" lift, mild ramps and lift so not a lot of spring pressure...don't know your cam specs
heads 430 cfm---366 cfm = 64 cfm
cid 572---512 = 60 cid
gears 4.10---4.10
suspension...cal-tracs---???
tires...295 radials---???
ET 9.54---9.55
With 3 more points of compression, a more aggressive camshaft, and a race only converter... I'm sure I'd be a lot faster than I am right now. But then I'd be on race fuel and the valvetrain wouldn't take the abuse of constant street driving without costly maintenance.
I don't really care how much faster it'd be with those changes b/c that's never what I intended to do with it. Like it sits I can drive it to the track, click off mid 9s without changing a thing, and then drive it home. Stop and fill up w/ pump 93 on the way back. CHIP
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: 3600-3700 lbs car to run 9.50's?
#266177
03/26/09 05:16 PM
03/26/09 05:16 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
OP
master
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OP
master
Joined: Nov 2003
Posts: 6,293
Rock Springs
|
Quote:
Quote:
What does it take to run 9.50-9.60's range with a car in the 3600-3700 lbs? Couple of buddies was wondering what E/T expectations I have for the car. Surly this Hemi will squeeze out 750HP.
-572 inch
-12.5:1 compression
-MP Cross Ram
-CNC ported Hemi heads flow 458CFM+
-Solid flat tappet with .700 lift and 280+ dur @50
Loose converter, 4.88 Dana gears, leaf springs, and cal tracks. 14x32 slicks.
What a ya think?
I have a simple question for ya:
Why the heck run a flat tappet cam? You got all that money tied up in a killer Hemi, and you gonna run a $50 camshaft?
This car will see lots, and lots of street use...
Im not worried about the cams performance...
I wish the cam and lifters were only $50, I would have saved about $350 then. LOL
I also know what happens when you loose a roller lifter, despite what people say...they can and will come apart. Most people keep this from happening, by replacing them ever few seasons.
I really like a solid flat tappet cam, period. They are simple, and dont fly apart on you. With the cam specs I am looking at with this solid flat cam, the spring pressures would be pretty high with the same size roller. I don't waste my money of Hyd roller crap. Two cam choices for me, large solid flat cam, or larger solid roller. Go big or stay home, no in between..
Cam is a Custom Bullet from Ray Barton. Ray has quite a bit of experience with cam testing in Hemi's. He wouldn't even tell me the spec's, until I payed for it LOL Other than "Its a Big One"
cam has .700+ lift, and dur @ 50 is 282.... Hows that for you little roller guys 
Lifters are Howards EDM direct lube style.
It will eventually get a roller upgrade BTW, but not until it comes off the street.
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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