1170

[34nineteen]

Is the dyno scared?

 

[mike lowary]

We definitely have unfinished business

 

[34nineteen]

 

[mike lowary]

All polished up and ready to go. Dyno at 10am Saturday

 

[kz6fittycent]

All polished up and ready to go. Dyno at 10am Saturday

Looking really good! Have fun tomorrow - it's rainy and cold here in TX, hopefully you don't get any of our weather.

 

[cocoabutterlover]

.. so what results were?

 

[kz6fittycent]

You know, any time I see this thread has an update, I get excited.

 

[34nineteen]

Mike lowary is a tease. He was showing off pics of some awesome looking Tri-tip that he had smoked all day and cooked up. It must be nice to be the king.

 

[mike lowary]

Lots to discuss. Getting my ducks in a row

 

[mike lowary]

I did get a baseline on my stock 2003 xb9. She made 81hp and 65tq. Running real good. The 1170 made 102hp and 73tq. This graph shows the stock bike dyno, the first pig rich 1170 dyno and this last 1170 dyno with a good tune.

 

[mike lowary]

Seems I’ve spent a lot of money to end up with 1050 kit hp. Well short of the 120 hp this build was supposed to make...

 

[mike lowary]

Bike runs good. What could be the issue....

 

[mike lowary]

As soon as I got home from the dyno I pulled the plugs and did a compression check. 170 psi on both cylinders. Let that sink in for a minute. 170

 

[mike lowary]

After running some numbers I found out the 1170 has less than 10:1 compression. Less than stock compression! I was told this combination would make 10.5-10.8:1. On top of that the redshift cams I chose were a mistake. The cam timing is all wrong for the motor. With these two issues I could have run the 1170 motor on 87 octane! This has to be where the power is hiding. So I made 21hp over stock with the same or less compression. That’s kinda impressive lol.

 

[mike lowary]

I’ve been talking with Aaron Wilson of Hammer performance. He says he can help. I don’t know about you guys, but I’m not happy with 102. That’s not what I paid for. So, Aaron is gonna make me a custom set of 30 degree reverse dome pistons at about 11.5:1 compression, doing a cam change but tweaking the cam timing, adding 1.725 roller rockers. I’m determined to find the rite combo to make this motor scream. I’ll update as I go. This is far from over

 

[mike lowary]

https://youtu.be/OALIgRaJok4

stock bike dyno run

 

[34nineteen]

No BBQ pics? I'm thinking about making that tri top pic into my screensaver. LOL.

 

[34nineteen]

As soon as I got home from the dyno I pulled the plugs and did a compression check. 170 psi on both cylinders. Let that sink in for a minute. 170

Just grind off some of the leading and trailing edges of the cam profile to reduce the overlap. Easy peasy. You do have a bench grinder, right? :black_eyed:

 

[mike lowary]

I actually need More overlap. The redshift 585s only have 35 degrees of overlap. I need closer to 50 degrees. The cam timing on the intake valve closing is too late also. The redshifts close the intake valve at 59 degrees. I need closer to 53 degrees. So, I’m going back to the cat 3 cams. They have 50 degrees of overlap and 49 degrees for ivc. I’m gonna retard the cam 4 degrees to get the timing right. So in the end I should have 50 degrees of overlap, ivc at 53 degrees, and adding the 1.725 rockers will give me a lift of .583.

 

[34nineteen]

Sounds like you need mo powa baby!