a broke crankshaft, in my opinion. You were good until you got to cylinder heads and cam. At that point you're just asking for trouble. You can't make any kind of real power without increasing your cylinder pressure (which is what cam and heads do), which increases load on the crank, and eventually, you'll be able to see through your motor like this. Crank broke on the 7/8 mainpin, shoved the pistons into the heads (broke both heads into 2 physical pieces), broke the rear main and that cracked the transmission bellhousing and let the back part of the crank open the oil pan and sling into the cam, breaking that.

The only thing that they could put on the new motor was the water pump, intake manifold, carburetor, and headers.

 

Assuming that doesn't happen. How much horsepower would I be making?

 

Modeling in Desktop Dyno 2000:

Stock: 177 HP @ 4500, 242 tq @ 3500
throttle body (400cfm to 500cfm): 179 @ 4500, 244 @ 3500
valvetrain (from .432 lift to .500, most you can go): 181 @ 4500, 245 @ 3500
milled heads (CR from 9.5 to 9.8): 184 @ 4500, 248 @ 3500
pocket port the heads: 203 @ 5000, 257 @ 3500
headers: 215 @ 5000, 265 @ 3500

1. Summit, Differential, No-Slip Traction System, 29-Spline, Mopar8.25 $488.95 +0/+0

2. HughesEngine Hydraulic RollerV6 Camshaft $200.00+Core +1/+0.5

3. Summit, Rocker Arms, Pedestal Mount, 1.7 Ratio, Aluminum, FullRoller $265.95 +1/+0.5

4. Summit, Flowmaster 10, Single in/dualout $69.99 +0/+0

5. FastmanThrottle body, 46mm $225+ Core +2/+2

6. Five-o-motorsport,Fuel Injector: Bosch XF2E, 22.2 lb OE Upgrade 247.80 undetermined

7. Summit, MSD Blaster HVC Ignition Coil $125.95 undetermined

8. Andy's AutoSport, MSD Ignition Tachometer/Fuel Adapter $46.16 (you do not need this)

9. Andy's AutoSport MSD Ignition Spark Plug Wire Set - Street Fire - 8 Mm Silicone/SyntheticJacket Resists Heat $33.03 +0/+0

10. Speedway Motors,MSD 6AL Ignition Control with Rev Limiter $227.00 undetermined

11. Oreilly Auto Parts, MCS MurrayTemperature Control - 180* Thermostat $8.00 undetermined

12. Summit, Autolite CopperCore Spark Plugs 3923$9.00 undetermined

13. Summit,Mopar Performance Valves, Intake 2.02 $131.70 factored in baseline

14. Summit, Mopar Performance Valves, Exhaust 1.62 $161.70 factored in baseline

15. Head milling Somewhat Free +3/+3 (and +20/+9 if you port them while they are off)

16. Summit,Gibson Headers $409.95 +12/+8

17. Lincoln Mark8 Fan, LocalJunkyard About $50.00 undetermined

18. Custom Intake Manifold ??? don't go there

19. Edelbrock 10 Inch air cleaner Free undetermined

20. Summit, GMB High PerformanceWater Pumps $109.95 +0/+0

TOTAL $2810.14

so +38/+23 based on my numbers?

 

Meanwhile, the 318 (in 1997, per allpar: http://www.allpar.com/mopar/318.html ) had 230 HP @ 4400 and 298 ft-lb @ 3200. You're trying to spend $3,000 for 215 @ 5000 and 265 @ 3500 based on desktop dyno. Not really worth it. Now if you want to go through the trouble of milling and porting the heads, that's going to be your best bang for the buck, if you have access to those abilities.

I don't know how much you can mill off the heads before you get into issues with the spark plug and water jackets. The blocks were not reliably decked from the factory, and every motor is different. I've heard that the pistons can vary anywhere from .05 to .08 down the hole at TDC. That can make a small difference in CR, along with head gasket thickness.

That said, I'm reading that 60 thou is the most you can go. Every 6 thou is 1 CC, so 60 thou is 10 CC, and will raise you 1/2-3/4 of a point, depending on what head gasket you use.

Now that also said, watch your intake runner alignment. You may have to fly-cut/angle-mill the intake for the bolts and runners to all line up correctly.

 

for the MSD, all you need for our daks is MSD PN 8884 coil adapter. That makes everything plug'n'play, and if something fails in the MSD, you can revert back to the PCM's ignition control by unplugging 1 connection. I just made a bid for a 6AL and coil for $120 together, I already have the adapter, so If I have the winning bid (likely), i may be sitting pretty.

http://www.jegs.com/InstallationInst...1/121-6420.pdf

 

Highly doubt it. Short of revng it to the moon, I very much doubt he'll be making anywhere near enough power N/A to break it.

 

are the V6 cranks that strong? Looking at how the split-pin design is done, looks like it would twist apart really easily.

 

some GTK information: http://www.superdak.com/the-internal...-9l-v6-magnum/

supposedly, there are chevy 4.3 V6's pushing 700 HP on a split-pin crank, but I'd like to know how long that lasts. Nothing says they're using a stock crank, either.

I know on the 3.9, max boost is 7psi and that's been proven several times. Ditto with NOS, very little tolerance. Again, cylinder pressure gets too high and you start destroying things.

 

So I didn't get the winning bid on the MSD/coil, but my methanol stuff is coming in today so I can finally get it tested/working/installed.

I'm doing everything as bolt-ons. Only the 1.7 RR's from harland sharp are V6 specific. That way if I ever drop a 408 in, everything can transfer over.

 

I don't think I will be making that kind of power N/A. I also do not plan on running NOS of a super/turbo charger. My plan is to make 300 hp N/A. When the time comes for a rebuild, I will bore it.