Re: How fast have you been with a standard stroke 383?
[Re: hudsonhornet7x]
#2995798
12/16/21 12:39 PM
12/16/21 12:39 PM
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Joined: Jan 2003
Posts: 14,515 So. Burlington, Vt.
fast68plymouth
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People have run in the 9’s with them in SS.
My heap has only been able to muster an 11.18@123 at 3550lbs running unported 906’s, RPM intake and SFT cam.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: How fast have you been with a standard stroke 383?
[Re: fast68plymouth]
#2995847
12/16/21 03:54 PM
12/16/21 03:54 PM
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Joined: Aug 2018
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jung
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Re: How fast have you been with a standard stroke 383?
[Re: fast68plymouth]
#2995939
12/16/21 09:13 PM
12/16/21 09:13 PM
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Joined: Aug 2008
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racerx
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People have run in the 9’s with them in SS.
My heap has only been able to muster an 11.18@123 at 3550lbs running unported 906’s, RPM intake and SFT cam. Thats not bad for a 383 @3550 lbs. What were the 60'? consider this a i have a 383 that i would like to put in something one day.
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Re: How fast have you been with a standard stroke 383?
[Re: hudsonhornet7x]
#2995948
12/16/21 09:42 PM
12/16/21 09:42 PM
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Joined: Oct 2007
Posts: 4,213 New York
polyspheric
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Due to the large chamber, short stroke and large rod ratio, the charge motion, vacuum, etc. near TDC is unlike larger engines. I'll bet the cam should look different as o I/E bias, OL, LSA.
Boffin Emeritus
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Re: How fast have you been with a standard stroke 383?
[Re: fast68plymouth]
#2996094
12/17/21 12:08 PM
12/17/21 12:08 PM
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Joined: Jan 2003
Posts: 14,515 So. Burlington, Vt.
fast68plymouth
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There have been quite a few 383 powered NHRA Stockers that get into the 10’s pretty regularly.
Those are way more impressive than my heap running 11’s with a cam that has .100” more lift, a big carb, and an aftermarket intake manifold.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: How fast have you been with a standard stroke 383?
[Re: fast68plymouth]
#2996104
12/17/21 12:28 PM
12/17/21 12:28 PM
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Joined: Sep 2007
Posts: 1,896 Spahn Ranch
RMCHRGR
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What are these quicker 383 engines revving to? Not a real accurate comparison here but the basically factory original, stock stroke 383 with a factory "335 hp" hydraulic cam in my Coronet won't go much beyond 4,500 rpm.
'71 Duster '72 Challenger '17 Ram 1500
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Re: How fast have you been with a standard stroke 383?
[Re: RMCHRGR]
#2996112
12/17/21 12:53 PM
12/17/21 12:53 PM
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Joined: May 2012
Posts: 1,853 South Bend
John Brown
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What are these quicker 383 engines revving to? Not a real accurate comparison here but the basically factory original, stock stroke 383 with a factory "335 hp" hydraulic cam in my Coronet won't go much beyond 4,500 rpm. Likely rpm limited by the hydraulic lifters and the way they pump up at that rpm and hold valves off the seat. I have used hydraulic cams that required adjusting them out to .006 using a feeler gauge. That did away with any possibility of pump up.
July 19th should be "Drive Like Rockford Day". R.I.P. Jimmie.
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Re: How fast have you been with a standard stroke 383?
[Re: John Brown]
#2996149
12/17/21 02:29 PM
12/17/21 02:29 PM
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Joined: Jan 2004
Posts: 8,374 fredericksburg,va
cudaman1969
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What are these quicker 383 engines revving to? Not a real accurate comparison here but the basically factory original, stock stroke 383 with a factory "335 hp" hydraulic cam in my Coronet won't go much beyond 4,500 rpm. Likely rpm limited by the hydraulic lifters and the way they pump up at that rpm and hold valves off the seat. I have used hydraulic cams that required adjusting them out to .006 using a feeler gauge. That did away with any possibility of pump up. Did the same with mine, zero lash (when pushrod stopped turning lock it down), 6800 easy with a .509 cam 11.60s @ 118 in a Duster street hemi converter.
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Re: How fast have you been with a standard stroke 383?
[Re: RMCHRGR]
#2996204
12/17/21 05:45 PM
12/17/21 05:45 PM
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Joined: Oct 2007
Posts: 4,213 New York
polyspheric
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The cam does not limit RPM, only power. With enough spring you can blow it up.
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Re: How fast have you been with a standard stroke 383?
[Re: polyspheric]
#2996209
12/17/21 06:22 PM
12/17/21 06:22 PM
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Joined: Jan 2004
Posts: 8,374 fredericksburg,va
cudaman1969
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The cam does not limit RPM, only power. With enough spring you can blow it up. I had 1.5” triple springs off a E Modified small block
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Re: How fast have you been with a standard stroke 383?
[Re: Twostick]
#2996404
12/18/21 12:11 PM
12/18/21 12:11 PM
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Joined: Oct 2015
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rb446
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I'm sure you guys remember the SS/IA Rod Shop Dodge now running here in UK, I saw it run a best of 10.2 in 2020 he blew the 7500rpm+ 383 motor so now has a Hemi in it.
https://duckduckgo.com/?q=rod+shop+dodge+challenger+launch+at+santa+pod&t=chromentp&iar=images&iax=images&ia=images&iai=https%3A%2F%2Fsantapod.co.uk%2Fimages%2Fdrivers2018%2FDuncanWattsm.jpg
1969 'Cuda 446ci, best 9.96@133.9 in 1990 1971 340 'Cuda, best 11.01@122.8 in 1987
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Re: How fast have you been with a standard stroke 383?
[Re: rb446]
#2996824
12/19/21 08:56 PM
12/19/21 08:56 PM
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Joined: Aug 2003
Posts: 43,352 Bend,OR USA
Cab_Burge
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I think I remember Dave Wren running in the 9.80s back a long time ago with his 1971 Cuda 383 SS/I car in the mid 1970s If I'm remembering correctly he let the clutch out at 8800 RPM and shifted it around 8200 RPM That motor was a unbored 400 block given to him by the Mopar factory drag engineers that they had built and flogged a bunch on the dyno before giving it to him to race to outrun the 350 Chevy in that class: devil:
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: How fast have you been with a standard stroke 383?
[Re: 69dart]
#2996978
12/20/21 10:25 AM
12/20/21 10:25 AM
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Joined: Nov 2020
Posts: 348 Isle of Sheeps
Gtxxjon
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There was a time in the 80’s and 90’s, folks would prefer a 383 engine. I guess they were ‘cheap and cheerful’ and plenty around, even in the UK. My first experience of Street driven Mopar 383 ‘drag cars’ in the early 80’s, was they ran quick! Before Aluminium heads and only purple shaft cams, they was King... The 906 head was the ‘bees knees’ back then and strokers were unheard of. Then the 90’s came and folks were running into the tens with iron head 440’s. My old iron headed 452 actually ran into the nines with no NOS. The best 383 I ever remembered was Steve Case’s, plum crazy Challenger. Street driven TEN second car and a real R/T too... Been around forever and still doing it large with a 383ci lol...
Last edited by Gtxxjon; 12/20/21 10:31 AM.
Carpe diem, quam minimum credula postero, thanx Horace!
There’s no point trying to fix stuff that ain’t broke,,, 'but if ain’t broke',,, you is not trying hard enough...
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Re: How fast have you been with a standard stroke 383?
[Re: Gtxxjon]
#2996983
12/20/21 10:37 AM
12/20/21 10:37 AM
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Joined: Nov 2020
Posts: 348 Isle of Sheeps
Gtxxjon
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There was a fantastic 383ci engine article in an old Mopar book, ''Musclecar and Hi-Po engines'' Chrysler themselves got Victor Edelbrock to do a 'Hotrod' article on a NEW factory 383ci engine in 1967! They had been hearing of ‘bad press’ for the 335hp ‘383ci’ so 'MOTHER MOPAR' wanted to put the record straight lol. On the Dyno, a brand new low mileage 383ci made only 280 horses... So with lots of machine work and the right camshaft, they got it up to 420 horses. The article does not say which heads were used 516 or 915 (440) heads? The biggest problem being was 'factory over-tight' clearances. ''Freeing the horsepower'' was just more piston to wall and bearing gaps, worth 100hp...
Last edited by Gtxxjon; 12/20/21 11:48 AM.
Carpe diem, quam minimum credula postero, thanx Horace!
There’s no point trying to fix stuff that ain’t broke,,, 'but if ain’t broke',,, you is not trying hard enough...
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