Have fast have you been with a standard stroke 383?

What heads and cam did you use?

What car was it in?



The 383 never gets much credit but I have always admired them. So let's hear some success stories.

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.

That's mega!

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.

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.

Been so long since he's posted but, Hutch is running respectable with his '383' crank motor.

150.246 mph. But that was at Bonneville in 1959 with a 361 in a '59 Plymouth. Does that count?

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.

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.

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

Close enough!!!

Kevin

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

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:

My car is a 3100 lb 69 Roadrunner and has been as fast as 9.87@137 mph. It's a 1964 block bored 4.310 stage VI early straight plug heads 2.14, 1.81 valves, long connecting rods, 11:1 compression and a DC 590 camshaft 5 degrees retarded . I shift normally at 7800 and it runs 10.00 at 134 to 135. When I beat it up a bit and shift at 8400 it has run its best numbers. Did break a Jesel belt a few years ago and buggered up my heads and it's been a turd running 10.20's ever since. Hoping to get everything back on track this winter.


Hutch

My roadster has been 9.60's and 5.80's in the 1/8th getting flogged several hundred laps a year.

It only weighs around 2100 with me. Its been a pretty solid combo. I have 2 engines and both shortblocks are the same. Stock crank, eagle rods, TRW (boat anchor) dome pistons.

I have tried lots of cams, intakes, spacers, and carbs trying to find the fastest/most consistent combo. I like the baby solid rollers, I have tired bigger cams but they didnt show any gains.

I want to throw some hose at it and see if it will run 5.50's.

Thinking I may drop a stroker crank in one of them on the next freshen in another 1000 runs or so.

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...

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...