Da'40: The Baby Steps Forward

[pappy]

Dyno today. I'm not convinced on the rpms. Before the pull I asked if he wanted the hood up for the tach. He told me the computer figures it out on its own based on the starting rpm. I'm not convinced. He ran my tach up to 4000, yet the reports quit at 3700. I'm going to look for a second opinion that hooks up the computer to a spark plug. While it probably would not change the torque curve much it could change the horsepower number by as much as +10hp and make the numbers more consistent with the donor engines.

 

[pappy]

BTW, 233lb-ft rear wheel torque translates to 284lb-ft at the crank assuming an 18% loss through the drive train. I do believe this is higher than a 1FZ-FE.

 

[alia176]

BTW, 233lb-ft rear wheel torque translates to 284lb-ft at the crank assuming an 18% loss through the drive train. I do believe this is higher than a 1FZ-FE.

Considering what you spent on your engine, I'd sure hope you have a higher HP than a stock 1FZ-FE

 

[pappy]

My instructions to Tim were to make me a 'torque monster.' He accomplished that. The engine wasn't built for rpm, which is necessary for HP. The torque curve is ruler flat.

Remember, the 2F is a long stroke tractor engine and was not built to spin fast.

201 lb-ft @ 1150rpm
214 lb-ft @ 1500rpm
223 lb-ft @ 1750rpm
229 lb-ft @ 2000rpm
226 lb-ft @ 2250rpm
223 lb-ft @ 2500rpm
220 lb-ft @ 2750rpm
214 lb-ft @ 3000rpm
200 lb-ft @ 3250rpm
180 lb-ft @ 3500rpm

Want to put your truck on the same dyno?

 

[alia176]

Want to put your truck on the same dyno?

Should I spent $$$ on the engine first or just go as is?

 

[Beowulf]

3FE torque curve

1FZ-FE torque curve

-Mike-

 

[pappy]

I don't have a scanner, so a camera pic will do.

 

[pappy]

Should I spent $$$ on the engine first or just go as is?

You might look at this thread for some good ideas.



edit:
And geez, this engine went from 200lb-ft to 284lb-ft ... a 42% increase in torque!
Don't like me using the 2F numbers, it's still +29% using the 3FE number.

 

[BionicCruiser]

how much was it to do the dyno run? i'd love to see my 40's numbers.

 

[pappy]

August special ... $60 for two pulls. Normally $75 for two pulls.

 

[cruiserdan]

Is it a four-wheel dyno?

 

[Beowulf]

Is it a four-wheel dyno?

Is your lumpy old Dodge 4wd?

-Mike-

 

[pappy]

Two wheel dyno. You 80 boys would need to pop off the front drive shaft.

 

[cruiserdan]

Is your lumpy old Dodge 4wd?

-Mike-

One of them is.

 

[alia176]

Two wheel dyno. You 80 boys would need to pop off the front drive shaft.

Well, not all of us

However, there's a four wheel dyno that's off of 528 if anyone needs to use one.

Admittedly, the 1FZ-FE hp peaks at a ridiculous RPM of 4300, which no one operates the engine at; consequently, they suck at maintaining hwy speeds when loaded down for bear. And the torque peak isn't all that great at 3,500 rpm. So, basically about the only time this engine peaks out hp/torque is when we got the gas pedal floored while passing someone!

 

[pappy]

Ready for cooler weather. Now I just need to hook up the heater. Top is a used Kayline with new windows.

 

[cruiserdan]

Nice.

 

[alia176]

bun warmers?

 

[SteveLCetc]

Remember, horsepower is only torque times rpm (with a conversion factor). If you don't see the same shape just modified by multiplying by rpm, the graphs are bogus. A kink in torque at an rpm leads to a kink in horsepower at the same rpm. Some of the graphs on this thread are bogus - manufactured by a pseudoengineer marketing person.

 

[Daisy 53]

Sweet top Jon!

Daisy