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Re: How many RPM's can you twist a stock 440 ? [Re: NAS Backyard] #1126739 12/03/11 10:31 PM 12/03/11 10:31 PM
Joined: Mar 2005 Posts: 493 Arizona A az426john mopar
az426john mopar A Joined: Mar 2005 Posts: 493 Arizona	The old school general rule of thumb was to shift about 10% over peak power anything more and you are twisting the motor for no good reason. If it were mine I would put it on a good chasis dyno at a reasonable ambiant temprature in a good state of tune with good gas in it and see where generally peak power is. Then shift 10% above that number. Just IMO 2 cents worth.

Re: How many RPM's can you twist a stock 440 ? [Re: az426john] #1126740 12/04/11 03:28 PM 12/04/11 03:28 PM
Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada R RUNCHARGER I Live Here
RUNCHARGER I Live Here R Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada	Sure you can twist it to 6000 but it's not doing any good with those stock heads and mild cam. It will be faster if you shift it at 5000-5500, I would fix the trans governor issue. Sheldon

Re: How many RPM's can you twist a stock 440 ? [Re: RUNCHARGER] #1126741 12/04/11 05:14 PM 12/04/11 05:14 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Quote: Sure you can twist it to 6000 but it's not doing any good with those stock heads and mild cam. It will be faster if you shift it at 5000-5500, I would fix the trans governor issue. Sheldon Exactly. Plus the engine will live longer.

Re: How many RPM's can you twist a stock 440 ? [Re: NAS Backyard] #1126742 12/04/11 07:17 PM 12/04/11 07:17 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	adjust your kick-down a.k.a. throttle pressure a little more. 6k is fine for a 440 but depending on the build you might be giving up some performance [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: How many RPM's can you twist a stock 440 ? [Re: Mr.Yuck] #1126743 12/04/11 08:07 PM 12/04/11 08:07 PM
Joined: Sep 2003 Posts: 1,465 Carson City, NV B babarracuda pro stock
babarracuda pro stock B Joined: Sep 2003 Posts: 1,465 Carson City, NV	Watch at the strip. 440's leave Chevys at the start and at the big end the Chevy comes back. This is not better or worse. What I'm saying is that 440's are torquers and Chevys with their giant ports and valves RPM more. You should not need to RPM a 440 to go fast. Rev it as high as your EGO DEMNDS. Once you get it out of your system shift at 5500 to 5800 and be dead on consistant. That will win races at the strip. On the street you are just being a show off if you race and asking to have your car impounded!.

Re: How many RPM's can you twist a stock 440 ? [Re: babarracuda] #1126744 12/04/11 09:04 PM 12/04/11 09:04 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	You should be able to run mid 11's and stay right in the 6000 or just under range. Not a 440 but I ran best of 11.38 & consistent 11.40's and never broke past 6000 with my 360. Friend of mine runs a 440 and mid 11's in a B wagon and never cracks 6000.

Re: How many RPM's can you twist a stock 440 ? [Re: MoparforLife] #1126745 12/05/11 07:31 AM 12/05/11 07:31 AM
Joined: Jan 2005 Posts: 4,862 the frozen wastes... Pale_Roader Swears too much
Pale_Roader Swears too much Joined: Jan 2005 Posts: 4,862 the frozen wastes...	Would the experts in here agree a stock 383 could be revved higher, big cam and (modified factory) heads allowing...??? I've heard 6500 is the limit for a stock 383 bottom end. Sound right? or a bit ambitious?

Re: How many RPM's can you twist a stock 440 ? [Re: Pale_Roader] #1126746 12/05/11 07:41 AM 12/05/11 07:41 AM
Joined: Jul 2008 Posts: 30,431 Florida STAYcation BeEtLeJuIcE ! The village idiot's idiot
BeEtLeJuIcE ! The village idiot's idiot Joined: Jul 2008 Posts: 30,431 Florida STAYcation	I know guys that have taken a 383 "stocker"(heads and bottom-end) but with a slightly larger cam with headers go-to 7200. This is my choice on my V-drive boat ... because I need the rpms ... since it only has a 25% over-drive.

Re: How many RPM's can you twist a stock 440 ? [Re: Mr.Yuck] #1126747 12/05/11 11:53 AM 12/05/11 11:53 AM
Joined: Jan 2003 Posts: 75,020 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,020 U.S.S.A.	Quote: adjust your kick-down a.k.a. throttle pressure a little more. 6k is fine for a 440 but depending on the build you might be giving up some performance WOT is a governor function not a kickdown linkage function. Tim, what tac are you going by and have you confirmed it is reading correct?

Re: How many RPM's can you twist a stock 440 ? [Re: JohnRR] #1126748 12/05/11 01:20 PM 12/05/11 01:20 PM
Joined: Jun 2006 Posts: 5,162 CT GTX MATT master
GTX MATT master Joined: Jun 2006 Posts: 5,162 CT	I know a guy that bought a 67 GTX brand new. He put in a 320 degree Isky cam (the one Sox and Martin used in their '68 440 GTX) with fenderwall headers and 4.56s. He used to dump the clutch a 7200 and shift at 7200 I'm sure the car would have ETed better if he shifted it around 6000 but the point is he did that for 2 years on a stock short block. I think that's a testament to the strength of a Chrysler big block. I wouldn't recommend it though! Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street

Re: How many RPM's can you twist a stock 440 ? [Re: MoparforLife] #1126749 12/05/11 02:15 PM 12/05/11 02:15 PM
Joined: Apr 2005 Posts: 15,134 Kelowna, B.C. Canada D DPelletier I Live Here
DPelletier I Live Here D Joined: Apr 2005 Posts: 15,134 Kelowna, B.C. Canada	Quote: Quote: Sure you can twist it to 6000 but it's not doing any good with those stock heads and mild cam. It will be faster if you shift it at 5000-5500, I would fix the trans governor issue. Sheldon Exactly. Plus the engine will live longer. x3 depending on the cam, it's likely all done at 5500....but even if the cam is a higher rpm unit, the heads are done by then anyways. head flow, small cam, hydraulic lifters....it all adds up to the same thing. On a related note, HR or one of the other mags did a test awhile ago on all the big block motors; they built them all using edelbrock heads, the same compression and cam specs, carb ets. The 440 came in 3rd IIRC on the hp (the Buick used more radical heads because Eddy didn't make any for it) and 1st in torque.....quite an accomplishment for a 440 cu in motor being compared to the Buick, Olds and Pontiac 455's.....I'm sure more than one Buick guy woofed up his cornflakes over that! . The 440 is a low end motor with a healthy mid range punch.......it isn't suited to high rpm power production. Dave 1970 Super Bee 440 Six Pack 1974 'Cuda 2008 Ram 3500 Diesel 2006 Ram 3500 Diesel 2004.5 Ram 2500 Diesel 2003 Ram 3500 Diesel 2006 Durango Limited [url] http://1970superbee.piczo.com [/url]

Re: How many RPM's can you twist a stock 440 ? [Re: DPelletier] #1126750 12/06/11 06:50 AM 12/06/11 06:50 AM
Joined: Jan 2003 Posts: 1,376 NORTHERN CA HUSTLESTUFF pro stock
HUSTLESTUFF pro stock Joined: Jan 2003 Posts: 1,376 NORTHERN CA	I have a stock crank and rods,(shot peened) 260/268@.050 cam I shift at 7000 every time I drive it. Mike "Were in it to win it. Anything less will end up being..... A whole lot of fun doing!!" UNLAWFL RIP UN

Re: How many RPM's can you twist a stock 440 ? [Re: HUSTLESTUFF] #1126751 12/06/11 08:29 PM 12/06/11 08:29 PM
Joined: Jan 2003 Posts: 8,940 Holly/MI D Dean_Kuzluzski master
Dean_Kuzluzski master D Joined: Jan 2003 Posts: 8,940 Holly/MI	Quote: I have a stock crank and rods,(shot peened) 260/268@.050 cam I shift at 7000 every time I drive it. Mike Sounds all well & good IF you have lite-weight slugs??? Stock or factory TRW replacements.........notso good. R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04

Re: How many RPM's can you twist a stock 440 ? [Re: HUSTLESTUFF] #1126752 12/06/11 08:43 PM 12/06/11 08:43 PM
Joined: Feb 2003 Posts: 1,532 crisfield, maryland 21817 8 82ramIndy493 pro stock
82ramIndy493 pro stock 8 Joined: Feb 2003 Posts: 1,532 crisfield, maryland 21817	All I know is that I have turned a balanced STOCK bottom end with STOCK heads with a MP 284/484 cam 6500 on NOS, drove it 80 miles round trip on 4.56 gears to the track for 8 years before putting in a 493 stroker. Motor ran great when pulled and is ready to run still in another car if needed. A lot depends on the builder, the matching of parts and proper maintenance. Last edited by 82ramIndy493; 12/07/11 09:59 AM.

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