A little story for ya'll.
Sherrie went on the chassis dyno last week. We tuned the Megasquirt PNP and worked on the closed loop idle settings. It really is working very well.
We twisted it up until it wasn't making power a few times and it really sounded and made good power at 32 degrees of timing. It ran well at 34 but showed no gain. 93 octane pump fuel at 9.88:1 compression, and a total stock airbox and filter. Never went over 205 degrees.
As a refresher, this is a 347 inch with forged pistons, AFR 165 heads and a seriously ported explorer intake with a BBK 75mm TB and spacer with BBK unequal shorties and a 2-1/2" exhaust into new cats and Magnaflows.
Remember... my goal was not Mustang 6Krpm max power, but was torque for moving this car and making it fun to drive. That should explain my use of 'smaller' heads and massaged stock FoMoCo parts for the intake.
It was great to be able to lock out the OD with the Silverfox valve body and really reef on it.
So... On the 6th pull... our last pull of the morning....
at about 5200rpms...
The brand new Gates P/N 43050 water pump popped.
BOOM
I've never seen one go like this one went. It was a spectacular event, resembling the fountain in the middle of your town.. only green and steaming.
Off the gas, shift to neutral, engine idled perfectly and we shut it off. Leak stopped.
We thought the lower hose pushed off or the radiator tank popped but if that had happened it would have kept leaking.
So as we cleaned up the green slick steaming goo....
We saw it.
The belt tensioner wasn't even maxed out. The belt was no tighter than a stock tensioner could make it. So as it looks, I think it was a flawed casting.
I'll know when I get it off. Of course I'll show pix. I'm putting the same P/N pump right back on. Hopefully I can find all the impeller parts and nothing got into the cooling system. I think it's good.. no noise or grinding or anything. Just a green fountain.
So now the graph and numbers. the tuner said this car type, tires and AOD combo typically show a 22% loss at the tire where these numbers are generated.
Red is HP
Blue is Torque.
Bottom scale is MPH.
Solid lines are 34 degrees. Dashed lines are 32 degrees.
We didn't bother calculating RPMs at MPH because Jimmy Crack corn.
Looks like 385 'ish' torque and just under 300hp. The torque line is flat. I like that.
Now for the obvious.
It is choking. The stock airbox and inlet snorkel are not sufficient. Our plan was to pull on it with a straight tube into the TB, but we didn't get there.
If/When it gets more mods... we'll do that.
I wanted torque and reliable and chose pistons accordingly.
The old stories of 347s having oil consumption and rings through the pin boss days are over. Piston technology has come a long LONG way.
The headers are out of the box BBK unequal length shorties that I got on a swap and had a friend ceramic coat. Not ported or optimized at all.
I think there's 40hp in the air intake before the TB and a header change. I'm just gonna run it for a while....
The cam card is on this thread somewhere but it has .561/.556 lift. Old but NOS FMS 1.6 roller rockers.
Next week, the rear comes out. Total gut and rebuild. I've been sitting on the parts for a long time.
Driving to the dyno..made me laugh.
Giving it the beans through the 1-2 shift and it kinda went off the straight track but not because of wheelspin.
The 36 year old control arms and bushings were WAY overtaxed.
It's getting ADTR arms and bushings while the rear is out.
When I get it done, I'll get some pix on here.