Nicks Garage 383 build

[273]

Making a 383 into a 408.

 

[RAMM]

Making a 383 into a 408.

No I used a 400 block for a total of 426 CI. Theres a thread here about the Youtube guy that had the same idea. J.Rob

 

[Bighead440]

And??? Did you miss the 383? J.Rob

I bought it with another knocking 440HP (6pk rods) in it, so I never experienced the 383.

 

[273]

Even this stock ish 383 made stock hp but only 395 lbs-ft wasn't until they added headers and more carb did it hit 425 lbs-ft.

https://www.motortrend.com/articles/mopp-0209-upgrading-the-383-magnum-avs-carb/

Torque
RPM	STK	HDRS	CARB	INTKE	CAM
3000	382.7	406.3	427.1	405.5	394.2
3200	388.1	406.6	422.6	410.9	400.0
3400	388.3	412.6	431.9	421.2	414.7
3600	394.6	411.2	433.7	426.1	431.5
3800	392.4	408.3	430.8	430.0	435.5
4000	387.2	401.3	424.6	433.0	446.5
4200	377.8	396.2	416.4	430.1	451.5
4400	371.4	390.2	409.7	430.1	451.8
4600	367.8	384.6	402.0	427.8	454.2
4800	361.6	379.5	398.5	424.3	456.6
5000	355.1	373.4	385.6	421.3	450.3
5200	337.2	357.8	368.1	407.7	449.1
5400	322.8	348.5	351.4	395.1	435.8
5600		417.0
5800	407.6
6000	398.2

Horsepower
RPM	STK	HDRS	CARB	INTKE	CAM
3000	218.6	232.1	244.0	231.6	225.2
3200	236.5	247.7	257.5	250.3	243.7
3400	251.4	267.1	279.6	272.7	268.5
3600	270.5	281.9	297.3	292.1	295.8
3800	283.9	295.4	311.7	311.1	315.1
4000	294.9	305.6	323.4	329.8	340.0
4200	302.1	316.8	333.0	343.9	361.1
4400	311.1	326.9	343.2	360.4	378.5
4600	322.2	336.8	352.1	374.7	397.8
4800	330.5	346.8	364.2	387.8	417.3
5000	338.0	355.5	367.1	401.1	428.7
5200	333.9	354.2	364.5	403.7	444.6
5400	331.9	358.3	361.3	406.3	448.1

 

[RustyRatRod]

Btw, in case some didn’t catch it earlier……..

I still really like my 383

I mean, this is a 383 thread, right?

No, it's a piss on 383 thread.

 

[fishmens67]

No, it's a piss on 383 thread.

They can piss on it all they want, in all reality the 383 has more potential than a 340. The mighty 340 I might add. lol

 

[RustyRatRod]

They can piss on it all they want, in all reality the 383 has more potential than a 340. The mighty 340 I might add. lol

I cannot disagree. But then, we're just a couple of bumpkins, I guess. lol

 

[Desoto291hemi]

You know,,,,I don’t get it,,,,,,why do Mopar people bad mouth our products ?

That 383 Nick is showing needs some help,,,,,,I’m guessing the bores are not completely true .
Even a stock 383 should show more torque than that,,,,a brand new stock that is .
Yes,,,,,it was rebuilt by someone,,,,,but who knows what all was done,,,or how well it was done !
True bores,,,and compression,,,,will lead the way .
And a good sealing valve job !

How many people do an air test of the seats before they fire it up ?
I do it before I ever put on the rockers .

If the valves are not sealing against the seats,,,,,it only gets worse after the flame etches the seats .
After that,,,they never seal right,,,,,,and any stock type engine will be weak from then on !

It’s always the little stuff that gets most people .

Tommy