Brute low end torque
Thread Starter
|
Posting Guru
Joined: Oct 2003
Posts: 1,175
Likes: 0
Brute low end torque
I want brute low end torque So What do you'all recommend?(serious power 900-2500RPM)I have looked at a crane cam with 260*/272 adv Duration and .458"/.487" Recommended RPM Range 1200-5500rpm-seems high for my tastes as my truck NEVER EVER goes over 3k Rpms I shift at 2k but it runs about 2400rpm on hiway with 3.73's but I'm going to 4.30's with 33 12.50 R 16 BFG MT tires so my effective gear goes to about 4.13 with is about 10% over my 3.73 so about 27-2800Rpm after change I have the stock new 1bbl carter, timing= 6*btdc, stock exaust manifold stock coil, junky Bosh platinum plugs. Also will going to a taller air filter help mine is 1.25" tall Will a offenhauser Dual Port 4bbl intake manifold with the Holley 390CFM 4bbl/ with EFI split manifolds help??- it says RPM range 1000-5000RPMs What about a coil ?? Spark plugs-even the little things help? What about milling the stock head??
any and all welcome tips/tricks/combinations
Help me built the torquest 300 around
This is a 78 that has 117HP@3200RPM and 230Tq@ 1600RPM Is 350Ft LBs @ or less that 2k RPM resonable
Thank for your help.
Dustin
any and all welcome tips/tricks/combinations
Help me built the torquest 300 around
This is a 78 that has 117HP@3200RPM and 230Tq@ 1600RPM Is 350Ft LBs @ or less that 2k RPM resonable
Thank for your help.
Dustin
Super Moderator
Joined: Apr 2004
Posts: 34,513
Likes: 2,824
"Brute low end torque...."
What comes to mind is a Buick GS 455 with 510 or so at 1800 RPM. With that as a standard, your 300 will be making "acceptable" low end torque.
I don't see how you are going to go from 230 lb-ft to 350 lb-ft without a turbo or supercharger.
Modifications such as bigger carbs and exhaust and cams made for higher RPM AT BEST leave the low end alone and move the power peak to higher RPM. Most of the time one or a combo of them kills the low end.
Read the threads at the top here, all the tricks are listed. Shaving the head is mentioned, but I think you have to deck the block and get custom push rods as a result of the overall shortening to get enough of a CR boost to make it worthwhile.
It is what it is. Ford won Le Mans with a 427 V8, not the 300.
What comes to mind is a Buick GS 455 with 510 or so at 1800 RPM. With that as a standard, your 300 will be making "acceptable" low end torque.
I don't see how you are going to go from 230 lb-ft to 350 lb-ft without a turbo or supercharger.
Modifications such as bigger carbs and exhaust and cams made for higher RPM AT BEST leave the low end alone and move the power peak to higher RPM. Most of the time one or a combo of them kills the low end.
Read the threads at the top here, all the tricks are listed. Shaving the head is mentioned, but I think you have to deck the block and get custom push rods as a result of the overall shortening to get enough of a CR boost to make it worthwhile.
It is what it is. Ford won Le Mans with a 427 V8, not the 300.
Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
You might try a ported EFI head with a recurved distributor for a significant gain. That will give you almost a full point of compression increase and might require premium fuel. IF you keep your foot out of it you will get better mileage, so actual fuel cost shouldn't change much. A set of higher ratio rockers might help a little bit, or a custom roller cam should help a lot. Suck air in through a good manifold and carb and send exhaust out a set of headers with a good exhaust and you should be close. My stock EFI 4.9 with headers and exhaust put 272 ft-lbs to the wheels at 2100 rpm, which is about 315 ft-lbs at the flywheel, and it's got over 260k miles on the stock shortblock.
New User
Joined: Jun 2002
Posts: 23
Likes: 0
[IMG]f250-300098.jpg[/IMG] I had the above 300 installed in a 1962 /f250 after extensive mods. Compression is about 9.5, bigger valves, clifford cam, intake manifold, headers, edelbrock 350 cfm carb, rebuilt and modified T6 trans. Engine builder thinks we have about 300 fps of torque. As it is a flatbed and I loaded it with three tons of hay and it had no probs, I think its a good number. If anyone is interested I'll put together the details.
Mike
looks like the pic didn't come thru, I'll ask why.
Last edited by mcleanmi; Nov 9, 2004 at 04:55 PM. Reason: no picture in post.
Thread
Thread Starter
Forum
Replies
Last Post
KrautBurner
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
2
Aug 12, 2011 03:58 PM
