Slant six turbo 500 hp cost analysis
I am going to simplify this exercise by assuming that the engine in question will be free, since this is simply a comparison to the the other slant six (300 hp) and would cost the same. I was GIVEN my motor, so I know it happens.
I am also going to assume that it is an early slant motor with solid lifters and a forged steel crankshaft.
Since there is basically, only one head available for these motors, the comparison will be easy; the more powerful motor will have a full-on, professionally-ported head with larger valves installed (1.74" X 1.5",) while the 300 hp version will get the bigger valves, but no actual porting. beyond a little cleaning up in the valve pocket area.
Let's start with the reciprocating assembly:
Wiseco makes a nice piston (.045"-overbore) for this application. $423.28 This includes a narrow, low-drag ringset which must be filed to your specs before installation. They only fit 198-spec (7.005"-length) rods.
The recommended 198 Rods for this piston are $577.71. It is a forged steel H-beam design and are 7.005"-long.
Bearings: Main and rod kit: $46.99....Summit
Gaskets except for the brass head gasket for the 500 hp motor: $56.00 Summit
Copper Head Gasket for 500 hp motor: $150.00??? Please advise... not sure...
Distributor: Stock slant six electronic...$124.00 for a reman. "Cardone"; Mopar Performance apparently has discontinued it.
That's all for now; beddy-bye time....
More later.
This is an attempt to organize the information learned so far...
Slant six cost analysis for a 500 hp tune:
I will attempt to nail down the cost of building a 500 hp, 25+ pound-boost, early slant six that’s as much like the engines of Ryan Peterson’s and Tom Wolfe’s, both FABO members, and which both make a little over 500 hp, to a cost that is as close as I can figure it.
It will take lots of time and input from a variety of sources to put this estimate together, but it should be accurate to within a few dollars.
Here is the first of an ongoing-number of entries:
The engine for both the 500 and 300-horsepower project estimates will be free. That is a given, as people give these motors away all the time. I am doing it this way to make an easy comparison with the second project; a similar, cost-analysis for a 300 horsepower turbo motor. Cheaper, by far, with lots of cost-saving by using the original reciprocating assembly and other original. Stock parts. The 300-horsepower figure may be optimistic, but I don’t think it will be short of that by more than 25-30 horsepower. Could be wrong…
Twelve pounds of boost will be the limit with this motor, in the interest of maximizing parts’ life-expectancy.
The 500 HP motor:
The reciprocating assembly and its environs…
Pistons: Wiseco .045” overbore flat top. .167” down 424.00 set
(produces a 9:1 CR with an un-milled deck and head) and, these following rods:
come with low-drag, modern design, rings
Rods K-1, 7.005”-long, (198) forged steel, H-beam, $577.00 set
Main and rod bearings $49.00
Hard parts:
Head gasket: copper, $150.00 (???) please advise…
Or
Fel Pro $17.00
Distributor; reman. Cardone Mopar Performance electronic $ 124.00
Intake manifold, 4bbl, used Offy or Clifford, ebay… $200. Or…
Aussiespeed, 4bbl, about $500.00 short runner
Carb, 4150 Holley 650cfm double-pumper, with all blow-thru Hangar 18mods including a boost-referenced power valve: $800.00-$1,200.00
Snowperformance water/alky chemical intercooler $400-up, but cheaper ones are available, I am sure.
Exhaust header: Build your own or hire it done; none are currently available from the commercial sector. My partner (at the time) built one and by the time we had it professionally welded, ceramic-coated and paid all shipping costs, it was $1,000.00, but you can probably build one for less than $300.00, if you can weld. I can’t…
Intercooler: $300.00
Wastegate: $200.00-up…
Cam and kit: $400.... no pushrods or rockers needed and only shimmed 340 springs needed...
MSD system 6-AL $259.00
Spar Plug wires Taylor NOT solid core (won't work with MSD systems, they say.) $90.00
MSD coil $50.00
Deep pan $40.00
Oil pump $100.00
Turbo 66 mm $450.00-up
electic fan and water pump $190.00
Turbo cold side piping + downpipe for exhaust $300.00
A/F ratio meter F.A.S.T. $400.00
Machine work (to include align-boring, block decking, head milling, cal bearing installation, etc., etc...) $1,000.00
Cylinder head porting, including bigger valves $1,500.00
Spark plugs $16.00
Total so far: 9,520.00
Not cheap...
MORE LATER, as more info becomes available and I have more time.
Thanks for listening!:happy1:
