The F119 power modification thread

This thread is to have a place where we can discuss modifications that can be done to help extract more power from the F119 (The engine found in the 348 and Mondial T).

Let the fun begin.

 

Guess I should get this kicked off.

I found a couple of formulas for estimating the power potential of an engine based on the flow of the cylinder heads.

The 1st formula is:
flow x .25714 x number of cylinders = horsepower

The 2nd formula is:
flow X .26 (tested @ 28" of water) = horsepower per cylinder

Thanks to TheItalianJob, and the flow testing of his heads, we have the stock F119 intake flow numbers which are 209cfm @ 28"/H2O on a cam lift of .360. Plugging in that number to the first formula we get:

209 x .25714 = 53.74226
53.74226 x 8 = 429.93808

Rounded up that gives an estimated power potential the head could support of 430hp +/-.

Now let's see what the second formula gives.

209 x .26 = 54.34
54.34 x 8 = 434.72

Again I'll round that up to an estimated power output of 435hp +/- which the stock head can support.

Both estimates put the power potential right around 430 horsepower mark for the F119. I find this to be true based on intake modifications AndyH did to his F119 (ITBs, Cams, Exhaust, ECU, custom tune), and what Steve Maxwell did to his F119 (complete custom intake, modified headers, custom exhaust, ECU, tune). Both guys are definitely well over 400hp.

TheItailianJob also had bigger valves put in his head. He went from the stock 30.5mm up to 34mm intake valves. That increased the flow to 241cfm @ 28"/H2O on a cam lift of .360 (stock intake cam lift is .362). A quick run of those number gives an estimated power output of 495-501hp !!!! Again, numbers I find to be true based on the horse power numbers I was told the F119 made when it was raced in the IMSA series. Mind you they did turn the engine north of 10,500rpm to make +500hp, but it did make the power.

So what does this mean?

It means that the F119's breathing is CHOKED in it's stock form, limiting the power it can make. The heads can support the power, it's the stock intake, exhaust, and even cams holding it back.

 

Thanks Mike.

I want to have this as an open discussion for making power improvements. Lots of owners, new and old, would like to get more power out of their engines. So I figured why not create a go to thread.

 

The first thing many 348s owner do is put on a free flow exhaust on their car. This really helps the "exhaling" of the F119, especially on the earlier 348s that have the HEAVY dual can exhaust setup.

Pap replaced his stock dual can mufflers with a free flow X-Ost, did a before and after dyno, and he gained +18.8hp to the wheels. I also have gotten rid of my old dual can muffler in favor of a custom Gothspeed muffler. If memory serves me correctly both cans combined weighed around 70lbs. So by going to a free flow muffler, not only will you gain some power you will also get rid of some weight.

 

I'll be out there in a little over a week Tim, and then we'll have some fun.

Did you schedule a baseline dyno at Church's yet?

 

Right on.

I have an extra set of 4 hole injectors I'm gonna bring with me.

For those of you wondering what the difference is, the newer 4 hole injectors do a much better job of atomizing the fuel versus the old single hole injectors. Fuel that is atomized better will burn more efficiently = more power & better fuel consumption. Plus the set I'm bringing along flows better that the original injectors.

This video will give you a better understanding of the difference in the spray pattern old vs new.

[ame]http://www.youtube.com/watch?v=VfynoxL2RZI[/ame]
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Yup, just in case.

 

For sure, that's what Tim and I are gonna test out when I get there.

 

Agree, again.

A good pair of 200 cell metal core cats will get the job done. The problem with the stock cats is the "diffuser" right smack in the middle of the entry into the monolith chamber. It's meant to help distribute the incoming exhaust through out the cat, but all it's really doing (in my opinion) is acting like a restrictor plate. Plus the stock cats are also heavy.

 

I think I have a real old, worn out, set that the flanges can get cut off of. I'll see if I can dig them up and bring with if I find them.

 

Yup,

Bosch GenIII EV1 4 hole. Though I don't have the part number.
I paid about $160 for a set of eight from Osidetiger Home.

 

I gotcha.

Thing is, these are a way old, burned up, set that were cut up from when I first got my 348, and they do not retain the original shell. So that it why I'm not worried about cutting them up. I really saved them specifically for the flanges.