Cylinder Head Shootout (circa 2007-ish?)

[ghott]

Figure'd I would post this up for shiz and giggles. This was a dyno test done by Corey on the old ATV Tech.net web site...his SN was #8TRX450R I believe. I THINK this test was conducted back in 2007...or there abouts.

This was a cylinder head swap test only...the ONLY thing changed between all these runs was just a cylinder head. All of the heads had "Recreational" porting...not Race or Pro (dunno if any of them had epoxy in them or not).

The test bike was a 2005 TRX450R - stock bore/stroke/carb.

If I recall correctly, the mods on the test bike were:

- 13:1 piston

- intake ring (sparks I think?)

- hot cams stage 2

- dasa classic

The heads tested were:

- Stock

- Venom

- Baldwin

- Sparks

- Rage

- DASA

http://www.offtopic.forum/uploads/imported/2012/07/headtest_allhp-1.jpg

http://www.offtopic.forum/uploads/imported/2012/07/headtest_alltq-1.jpg

Take these results with a grain of salt. I'm sure everyone's porting techniques have improved greatly over the years and if this was done more recently...the results might be different! Again, I didn't conduct this test...just posting for info and discussion only because I had saved the graphs from way back then.

 

[Loud450man]

wish it would have had hp shown aswell... but thanks great info

 

[Mattonln]

Venom FTW!

 

[Loud450man]

hey at least it was more powerfull then sto.....well nevermind....

 

[ghott]

wish it would have had hp shown aswell... but thanks great info

What you talkin bout willis? First graph shows HP only....

 

[Loud450man]

sorry my computer must have been fuged up i couldent see the top graph lol

 

[chronicsmoke]

yah but I'm sure mixxer explained to the customer exactly what he was getting