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Re: 354 HEMI off the dyno
[Re: goldmember]
#996715
05/23/11 02:55 PM
05/23/11 02:55 PM
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Joined: Jan 2008
Posts: 449
Wisconsin
sjs64polara
OP
mopar
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OP
mopar
Joined: Jan 2008
Posts: 449
Wisconsin
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Quote:
Guess you need to put it in a car and post the results.
It’s going in a 29 Chrysler coupe street rod………… its just going to be a tire smoker 
If you guys don’t believe the numbers then call Hod Heads and ask them how much they make with these types of combos. (336) 352-4866 
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Re: 354 HEMI off the dyno
[Re: sjs64polara]
#996716
05/23/11 03:01 PM
05/23/11 03:01 PM
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Joined: Jan 2003
Posts: 8,547
State College, PA
RyanJ
moparts member
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moparts member
Joined: Jan 2003
Posts: 8,547
State College, PA
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Quote:
I’m perplexed about the comments. They build 355 Chevy circle track motors with 700+hp frequently. Those motors are only 9.5:1…………. And NVR isn’t to only guy in town doing it. Circle track racers jump around to different builders all the time. No one ever talks about dynos being hot, fat, off, whatever the lingo is.
You guys are funny
630 FT LBS of TQ... 1.78/INCH
The best N/A motor I have ever dynoed was 1.52/INCH That was 16.5:1, CNC heads flowing 390 cfm, Sheetmetal tunnel ram on Oxygenated race gas.
Most motors we dyno with heads flowing similar to yours, cam specs & compression also in parameters of yours make in the neighborhood of 1.20-1.25 FT LBS/INCH
You may not want to hear it, but it's just the truth.
That dyno is currently reading about 30% high. He needs to re-check his calibration & the strain gauge. It's a new SF902, it is a nice piece & motor looks to be well built from the pics, the power #'s are simply inaccurate, it's basically impossible to make those kind of #'s TQ wise N/A with that type of combo.
Don't worry about the HP #'s as others have said those are just being calculated of of the TQ that the strain gauge is reading & for whatever reason it is reading incorrectly or he has a correction factor error in the computer programming. Just focus on the TQ #'s being so far out of wack. 
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Re: 354 HEMI off the dyno
[Re: HotRodDave]
#996717
05/23/11 03:04 PM
05/23/11 03:04 PM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
master
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master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
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You may want to read the engine masters challenge article to better understand their numbers. If I am not mistaken each pull is an average HP and average torque over a range of RPM. They made three pulls with an average for each pull then averaged those numbers.
Long story short the numbers in engine masters challenge score card are not peak HP.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: 354 HEMI off the dyno
[Re: Leon441]
#996718
05/23/11 03:17 PM
05/23/11 03:17 PM
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Joined: Nov 2008
Posts: 660
San Diego
formula S
mopar
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mopar
Joined: Nov 2008
Posts: 660
San Diego
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Quote:
You may want to read the engine masters challenge article to better understand their numbers. If I am not mistaken each pull is an average HP and average torque over a range of RPM. They made three pulls with an average for each pull then averaged those numbers.
Long story short the numbers in engine masters challenge score card are not peak HP.Leon
Peek hp I was told by hot heads was 613hp at 6500 and the heads flowed 367 cfm ported
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Re: 354 HEMI off the dyno
[Re: RyanJ]
#996719
05/23/11 03:25 PM
05/23/11 03:25 PM
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Joined: Nov 2003
Posts: 3,062
Western New York
sixpackbee
master
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master
Joined: Nov 2003
Posts: 3,062
Western New York
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I would question the funky torque curve. I wonder if they had enough resistance in the brake when they pulled it.
1959 Bugeye Sprite
1967 Charger Black L code
1967 Coronet R/T Convert Green 440 auto bought from original owner
1968 Charger R/T Bronze 440 4 spd console AM/FM
1969 Super Bee WM21H B5 A40 D21 N96
1969 Barracuda Formula S 340 Convert pilot car
1969 Hemi Road Runner RM23J D32 Omaha orange 4.10 Dana N96 N85
1970 Super Bee WM23N FE5 V1X 3.91 axle package, N96
1970 Road Runner RM21N B3 V1X D13
1971 MG Midget
1971 Road Runner RM23H GW3, A57
1972 Road Runner RM23P FY1, D21
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Re: 354 HEMI off the dyno
[Re: sjs64polara]
#996720
05/23/11 03:52 PM
05/23/11 03:52 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
I’m perplexed about the comments. They build 355 Chevy circle track motors with 700+hp frequently. Those motors are only 9.5:1…………. And NVR isn’t to only guy in town doing it. Circle track racers jump around to different builders all the time. No one ever talks about dynos being hot, fat, off, whatever the lingo is.
You guys are funny
yea but they are spinning them 9k
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Re: 354 HEMI off the dyno
[Re: HotRodDave]
#996721
05/23/11 03:56 PM
05/23/11 03:56 PM
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Joined: Jan 2003
Posts: 16,124
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,124
Grand Haven, MI
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Quote:
I’m perplexed about the comments. They build 355 Chevy circle track motors with 700+hp frequently. Those motors are only 9.5:1…………. And NVR isn’t to only guy in town doing it. Circle track racers jump around to different builders all the time. No one ever talks about dynos being hot, fat, off, whatever the lingo is.
to echo Ryan and Dave, the high torque numbers are the first thing that didn't pass the smell test. the highest torque/CID pump gas motors I can recall seeing results of are ~1.4lbs/CID. that would put a 360 cube motor at 500 ft-lbs. most of those are usually high compression, pretty decently sized cam motors, stuff that's on the edge of pump gas capability.....
if the torque numbers are off, then the HP numbers (derived from torque) are off....
as far as 700HP roundy round motors, my bet is their HP peak ~8k RPM, or higher, which would require ~460 lb-ft at that RPM, which means a biiiig cam, probably in the 270-280@.050 range....they're probably also running methanol and extreme compression ratios.
heck, top nascar engines (what I'd call bleeding edge technology for pushrod motors) are making 750-850hp from 358 cubes, but at ~10,000 RPM...which again, requires about 450 lb-ft at that RPM....
if I had to swagger, based on the combo, I bet a more realistic number is going to be 400-460hp, 420-450lb-ft of torque, with HP peak in the 5800 RPM range.....
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: 354 HEMI off the dyno
[Re: fishy340]
#996723
05/23/11 04:30 PM
05/23/11 04:30 PM
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Joined: Jan 2008
Posts: 449
Wisconsin
sjs64polara
OP
mopar
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OP
mopar
Joined: Jan 2008
Posts: 449
Wisconsin
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The hp numbers don’t mean anything to us. I’ve said that several times. We’re not dyno racers. I thing I DIDN’T say was flow numbers, I don’t know where that comment came from. I never mentioned what was done to the heads either. What ever the case is……. I still find you guys funny. What’s the next heated discussion going to be  
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Re: 354 HEMI off the dyno
[Re: sjs64polara]
#996725
05/23/11 04:57 PM
05/23/11 04:57 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
The hp numbers don’t mean anything to us. I’ve said that several times. We’re not dyno racers.
I thing I DIDN’T say was flow numbers, I don’t know where that comment came from.
I never mentioned what was done to the heads either.
What ever the case is……. I still find you guys funny. What’s the next heated discussion going to be
you know that is one sweet looking motor, I don't care if it makes 100hp 
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Re: 354 HEMI off the dyno
[Re: goldmember]
#996728
05/23/11 05:20 PM
05/23/11 05:20 PM
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Joined: Jan 2008
Posts: 449
Wisconsin
sjs64polara
OP
mopar
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OP
mopar
Joined: Jan 2008
Posts: 449
Wisconsin
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Quote:
"The hp numbers don’t mean anything to us." Then why post them? Everyone has been nice to you,even if the "dyno numbers" (that you posted) were far from realistic with the info you provided.
I would have posted the numbers if they were 300hp. I’m happy for my old man  It’s the first Hemi since him and Ron Ritter purchased Chris Karamesines “Chizler” in the early / mid sixties.
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Re: 354 HEMI off the dyno
[Re: galen]
#996731
05/23/11 08:21 PM
05/23/11 08:21 PM
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Joined: Jan 2003
Posts: 2,129
Vermont
TrWaters
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,129
Vermont
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Quote:
Very nice, I like it. Who built the headers,if you don't mind me asking.
Those appear to be HotHeads headers, as well as their heads, intake, valley cover, front cover, pulleys,water crossover, etc.  And the Stef's pan.
TR Waters
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Re: 354 HEMI off the dyno
[Re: TrWaters]
#996732
05/23/11 08:37 PM
05/23/11 08:37 PM
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Joined: Dec 2009
Posts: 21,590
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 21,590
in a cattle trailer down by th...
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I've heard the early Hemi heads don't need a lot of lift to flow good numbers. I've only heard that though, no personal experience. However who cares what it makes, it's got the major cool factor going on and in a 29 Chrysler it should be sweet. Have fun and tell the old man I envy him.
"Come get your wife"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Front and rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: 354 HEMI off the dyno
[Re: TrWaters]
#996733
05/23/11 08:53 PM
05/23/11 08:53 PM
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Joined: Jan 2008
Posts: 449
Wisconsin
sjs64polara
OP
mopar
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OP
mopar
Joined: Jan 2008
Posts: 449
Wisconsin
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Quote:
Quote:
Very nice, I like it. Who built the headers,if you don't mind me asking.
Those appear to be HotHeads headers, as well as their heads, intake, valley cover, front cover, pulleys,water crossover, etc. And the Steff's pan.
I think they are Hot Heads headers, non sure. You nailed the rest of it
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Re: 354 HEMI off the dyno
[Re: Guitar Jones]
#996734
05/23/11 09:01 PM
05/23/11 09:01 PM
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Joined: Jan 2008
Posts: 449
Wisconsin
sjs64polara
OP
mopar
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OP
mopar
Joined: Jan 2008
Posts: 449
Wisconsin
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Quote:
I've heard the early Hemi heads don't need a lot of lift to flow good numbers. I've only heard that though, no personal experience. However who cares what it makes, it's got the major cool factor going on and in a 29 Chrysler it should be sweet. Have fun and tell the old man I envy him.
Thank you
Be careful what you say otherwise you may get in a wrestling match  
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