Dyno Testing Bolt-ons On The 4.0

[MikeE024]

Any plans to personally test SteelCity06's brushless OEM SPAL cooling mod for power gains?

https://wranglertjforum.com/threads...pal-19-850-watt-electric-brushless-fan.78963/

 

[carrotman]

Had a chance to do any of these tests yet @Jezza?

 

[Jezza]

Had a chance to do any of these tests yet @Jezza?

None yet. I have been working on getting all the parts together and waiting for the weather to cool off a bit.

 

[Jezza]

I have been working on this slowly getting things in place. I have sourced a cam and springs as well as a few other bolt ons. Also to make some of the comparisons as fair as possible some of the parts have to be installed and fitted then removed to be staged for the dyno. The Windstar filter was tonight's project. It turned out better than I expected. The housing really does fit well under the hood.

 

[NashvilleTJ]

Without posting results, you are just teasing us, Dude…

 

[3jeepfan]

I like your utilization of a tube & elbow off the throttle body. I used part of the stock intake, yours looks cleaner. Also, is that a coolant filter I see?

 

[BlueC]

The Windstar filter was tonight's project. It turned out better than I expected. The housing really does fit well under the hood.

Is that a pre-made kit, or did you piece everything together?

 

[Jezza]

Without posting results, you are just teasing us, Dude…

Sorry, I have to make sure it fits. I want to make sure I can swap it quickly when on the dyno. I don't want to be accused of letting the engine cool too much.

 

[Jezza]

I like your utilization of a tube & elbow off the throttle body. I used part of the stock intake, yours looks cleaner. Also, is that a coolant filter I see?

Thanks, and yes that is a coolant filter.

 

[Jezza]

Is that a pre-made kit, or did you piece everything together?

I pieced it together with parts I had here and elbows that I ordered.

 

[Jezza]

I still haven't forgotten about this. This fall has been hot here and I wanted to run the testing between 50 and 70 degrees. I'm not sure we have gotten down there yet. In the meantime I made an overdrive water pump/fan pulley for our much neglected 97-99 guys. I'm still testing it out and waiting for a few different sizes of belts to show up.

 

[SkylinesSuck]

Let me know when those are up for sale please!

 

[Jezza]

Let me know when those are up for sale please!

It will be a little bit. I'm testing a new laser etched surface for the belt contact area, as well as a new in-house passivation process.

 

[Jezza]

I picked up a set of these Scorpian 1.7:1 roller rockers to try as well. Jegs had them on sale for under $350. They should make for a good test.

 

[NashvilleTJ]

I picked up a set of these Scorpian 1.7:1 roller rockers to try as well. Jegs had them on sale for under $350. They should make for a good test.

View attachment 604330

Whats the stock lifter ratio?

 

[BlueC]

Whats the stock lifter ratio?

I'm 99% sure stock is 1.6

 

[Jezza]

Whats the stock lifter ratio?

It's supposed to be 1.6:1. However, I measured a stock rocker arm and it seemed closer to 1.64:1. Although measuring a stamped steel rocker arm isn't an exact science. The position of the pivot and the tip contact are definitely open to interpretation.

 

[BlueC]

I picked up a set of these Scorpian 1.7:1 roller rockers to try as well. Jegs had them on sale for under $350. They should make for a good test.

View attachment 604330

Any time estimate when you'll start testing?

Also, just for fun, you should run the flatty.

 

[srimes]

It's supposed to be 1.6:1. However, I measured a stock rocker arm and it seemed closer to 1.64:1. Although measuring a stamped steel rocker arm isn't an exact science. The position of the pivot and the tip contact are definitely open to interpretation.

iirc, it's better to measure actual valve lift and cam lobe lift to get the ratio instead of trying to measure the rocker itself.

 

[Jezza]

Any time estimate when you'll start testing?

Also, just for fun, you should run the flatty.

I had to get the dyno electronics rebuilt completely. They are back now, but I sold some old cnc machines and am getting some new stuff. Once the moving is done I'll start the videos.