Hi there,


I was looking in a brochure for Ford F-Series 1996 printed 8/95 and reading Engine spec for 5.8 l Multiport V8, "Ratings for 1995, numbers for 1996 not available at the time of printing".


Comp ratio 8.8 Hp 210 @3600 rpm Torque 325 @2800 rpm


" Hp 205 @3600 rpm Torque 330 @2600 rpm California


Does anyone know what makes the difference between the ordinary and California numbers, a different cam, degreed cam, software etc?


What are the numbers for the 96 motor?

 

Differences in Cali are due to tighter emissions regs so the exhaust is even more of a cork. There is no difference in the '96 motor it's mechanically identical to the '94/95 motor but 49 state 1/2 ton trucks got OBD2 in that year so there are control and emissions systems differences.

 

Tanks for your reply Conanski,


I was guessing the cam was advanced some degrees to get better torque in lower rpm range , to the cost of a few hp.


Do the "Californians" come with a lower- stall torque converter, or do all 5.8, from these years, come with hi-stall converters?

 

I have never seen a one of these trucks with what I'd call a factory high stall converter, they all seem to engage just a little above idle.

 

I once took my 96 F-150 5.8 E4OD 4x4 to a transmission repair shop for a test drive, and the service guy said that I had a high stall converter in this truck. After this I digged around on the internet and got some answers in Dacco and Transtar converter catalogs, for E4OD 4-stud mounting:


Extra Low Stall 95K - 7.5L Gas , 7.3 L Diesel applications
Low Stall 105K - 4.9L 5.4L 6.8L 7.5L Gas, 7.3L Diesel
High Stall 140K - 5.0L 5,4L 5,8L Gas


Most likely it`s the High Stall 140K converter in my truck - as well as most other 5.8L trucks.
I experience this converter a bit too slippery ,especially if comparing to my 82 F-250 400 C6, but thats a real low rpm torque beast.

 

Um, just a quick comment K means thousands, so the extra low stall kicks in at 95,000 rpms ? sounds pretty high ..... .95 K would be 950 rpms ....

 

K is referring to K-Factor which is a torque converter rating, it is not a RPM. K-factor allows you to estimate the new stall speed of a converter if you were to change the torque.

K=RPM/SQRT(Torque)
or rearranged as
K*SQRT(Torque) = RPM

So for a 351w putting out 315tq
140/SQRT(315) = 2484rpm which should be about what your truck would stall to from the factory. Its also just a little under where the stock engine peaks in torque, so its a good fit for acceleration on a stock engine.

When they reference high stall there not talking about high stall when comparing to a drag car. Its more of a comparison to say a Diesel engine where 2400rpm is really high.

The 140K converter would be equivalent to stock on the 5.8L trucks.