Spent a little time on the dyno... check this sheet - Unofficial Honda FIT Forums

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Spent a little time on the dyno... check this sheet

  #1  
Old 01-11-2019, 10:32 AM
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Talking Spent a little time on the dyno... check this sheet

We here at Art of Speed Racing got to spend a little time on the dyno with a few of our GK5 racers.
Most have no internal mods at all and make 115-120 hp with a little fuel computer, shorty race exhaust and a performance filter.
This one however, has some serious headwork, an LRPTEC intake manifold and a MoTeC M142 controlling it all.
Bottom end is totally stock. Cam is stock.
We ran the test on 98 pump gas. The light blue curve is the tune we went with. 154whp
Can't wait to fab up a proper airbox (stock one is breathing through a tiny neck), and revisit the dyno.



 
  #2  
Old 01-11-2019, 10:39 AM
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That's an impressive jump, good work!
 
  #3  
Old 01-11-2019, 11:33 AM
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thats one bad a$$ manifold!
 
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Old 01-11-2019, 04:03 PM
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154 hp, nice
 
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Old 01-11-2019, 10:07 PM
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Nice numbers!

That's 98 RON pump gas?
 
  #6  
Old 01-13-2019, 11:47 AM
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Yessir,
We can't always expect to have race gas at every track we go to, so we tune to 98RON which is the best pump gas we can find in China. We'll eventually make a map for 100.
 
  #7  
Old 01-13-2019, 12:01 PM
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Yes, 154 wheel hp...so around 180 crank.
The key is freeing up airflow.

1) The manifold and throttlebody are key but very obvious bottlenecks. We are making our own budget piece but the customer liked the carbon LRPTEC so much that we went with that. Glad we did. It's beautiful and the workmanship is top notch.
2) Next bottleneck is the head, so that is where we went. The intake throats are smoothed and the bowls reshaped, the exhaust is smoothed and the exhaust channels (I don't even call these conjoined things "ports") were opened substantially as was the exhaust 'EXIT'. We cut into a junked head to find the safe limits of modifications. Beware there are hidden water jackets...
3) all the valves are stainless steel, flat-faced, back-cut, swirl polished and the exhaust valves are 2mm larger in diameter. This meant that we had to replace the seats with larger pieces. The exhaust ports are opened up to suit...which is to say substantially.

This is where we found power.
Had the first shakedown run today...car is quick.
 
  #8  
Old 01-14-2019, 02:11 AM
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Originally Posted by CarbonTek View Post
3) all the valves are stainless steel, flat-faced, back-cut, swirl polished and the exhaust valves are 2mm larger in diameter. This meant that we had to replace the seats with larger pieces. The exhaust ports are opened up to suit...which is to say substantially.
Where did you get the bigger valves + seats?

 
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