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Author Topic:   Switching to a Ford.
Mike15LM
Dirt Roller

Total posts: 11
posted September 30, 2005 05:55 PM  
For this year we wanted to go to a Ford 358 rule motor from a GM super late model. I still have the dry sump and belt drive fuel system. A friend has given us a 351W that was borded .030. My question is, for a 1/3 mile dirt track in a 2400# late model, what do I do to build this to beat the chevy guys.

Rules
Engine Specifications
Engines limited to 358 cubic inches.

Block must be a standard production block that was less than 358 cubic inches originally. No
aluminum blocks. Chevy bow-tie block and Ford SVO block permitted.

Crankshafts must be factory production. Stroke must remain stock. Crank may be turned a
maximum of .040 under. No swapping of cranks. Ford SVO crank number M6303-D351
permitted. MOPAR high performance crank with part number P1420312 permitted.

Rods - A production rod from a V-8 engine under 358 cubic inches. Modification of rod length
prohibited. Rods, block and crank to be used in the same combination that factory originally
manufactured. Any stock dimension steel rod (No titanium) may be substituted. Stock
dimension includes length, wrist pin location and journal size. Approved after market rod must
be in factory condition, no polishing or reworking. No addition or removal of metal other than
normal balancing. All 350 engines must have a 3/4 inch inspection hole in the left side of the oil
pan opposite the number one rod journal. Any windage tray which would block the view of the
rod must be removed. Ford permitted to use 6 inch length rod with SVO crank.

Flat top pistons only. Zero deck, piston may not be above the block.

Any factory steel head, or DART/ World Products Sportsman II steel head. DART/World
Products casting number must be I037. Must have a 60 cc minimum combustion chamber. No
aluminum heads. No relocating rocker arm studs. No porting or polishing. Matching ports in the
intake port of head only. Depth maximum for matching ports is 3/4 of an inch. Lifter bore must
remain stock. The valve seat area can be cleaned up using a maximum 70 degree grinding stone.
No additional hand or machine work permitted. CC measurement of intake runner of head to
remain stock with the exception of matching port.

Production valve or production replacement, steel or stainless steel only. Any spring, any
retainer permitted. Roller rockers permitted.

Flat tappet cams only. No mushroom or roller cams.

Crank and block must be standard production parts. Must have been installed on an assembly
line automobile. All factory identification numbers and/or part numbers must remain on crank
and heads.

General Engine Specifications
Maximum of four barrels of carburetion. Single carburetor only. No super chargers, fuel
injection or turbo chargers.

Any approved intake other than a smoke ram or tunnel ram. Intake height to be a maximum of 8
inches measured from the top of the carburetor bowl using a straight edge from the bowl to the
#3 or #4 runner of the intake manifold.

Balanced assemblies optional.

Must have a working clutch and starter. Multi-disc clutch permitted. Stock configuration clutch
must have a full scatter shield of at least 1/4 inch thick steel or an approved bell housing.
Failure to do so will result in an automatic suspension and loss of points.

Fuel - Methanol only according to Federal Standards of Purity, Grade A or AA.
No additives of any kind including top lube.

No electric fuel pumps or pressurized fuel systems. No inboard (in driver's compartment) fuel
pumps.

Gear drive units permitted. No externally adjustable cam timing device.

Any battery ignition. No magneto.

No needle bearing cam, crank or rod bearings permitted.

No titanium rods.

oldfordmod
Dirt Full Roller

Total posts: 46
posted October 02, 2005 04:40 PM  
A very competitive ford can be built under these rules using the N-351 ford sportsman heads and a super victor intake. These heads make max power with only 23 degrees of total timing which gives a positive pumping torque over any of the chevy heads which have to run 30+ timing. If you follow Hooters Cup racing, you noticed that they outlawed the N heads in favor of Brodix spec heads for all to give the chevy's a chance.

mike9
Dirt Full Roller

Total posts: 72
posted October 03, 2005 06:46 AM  
and the Fords are still the strongest cars in hooters pro cup even with the spec head

akadirtracer7
Dirt Freak

Total posts: 217
posted October 03, 2005 11:19 AM  
Didn't the n heads get outlawed in arca to.

oldfordmod
Dirt Full Roller

Total posts: 46
posted October 03, 2005 02:04 PM  
Back to your engine combo, We ran a similar engine in the old ROMCO asphalt series in Texas as follows: A SVO block with 2.75 mains and 2.1 chevy 6 inch aftermarket rods,the G-351 crank, dry sump at 60 psi idle hot, un ported (but with a bowl clean up and port match) N-351 heads with ss 1.600/2.02 .100 longer chevy type valves, Roller cam with 260* at .5, .700 liftand and 106 LC, 1 3/4 headers which merge into 1/5/8 then into a 3 1/2 collector. The car won several features and would have won many more except for flat tires. This engine produced 602 HP dynoed. It is very similar to your rules. Never run a ford over 7500RPM without a dry sump or at least an external pump (too much bearing area)unless you have 302 mains and 2" or smaller rods. This engine was a high torque engine, later versions used wilder cams for tighter torque bands and higher rpm.

Mike15LM
Dirt Roller

Total posts: 11
posted October 03, 2005 02:09 PM  
Thanks guys, I was thinking a cleveor but this sounds even better!!!!!

Mike15LM
Dirt Roller

Total posts: 11
posted October 03, 2005 04:06 PM  
Hey does anybody know if the Parker Funnel intake comes in 351 W. If so what do you all think of it.

ford5
Dirt Forum Champ
Total posts: 711
posted October 03, 2005 05:35 PM  
They don't make them for the 9.5 block.....I called them

Mike15LM
Dirt Roller

Total posts: 11
posted October 06, 2005 04:09 AM  
I need to run a flat tappet cam. Do you guys have any recommendations?

Mike15LM
Dirt Roller

Total posts: 11
posted October 23, 2005 07:24 PM  
What would happen if I were to go from the 5.975 rod to the 6.200 rod

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