Anyone dynoed them before and after? What cam and valvetrain were you running? Thanks!

 

If I could afford a set right now I was planning on installing them at the dyno itself just to see if it does offer any gains, but alas, I can't and I haven't. The car I did install the rockers on hasnt been to a dyno in a while so we won't have before/after #'s.

 

I thought someone did, to the tune of 7hp across the board? Something like that.

 

SLP did.. although Yella Terra disputed these claims:

 

I don't believe those results at all. Yella Terra's lost 27 rwhp? Kinda like the 40+ rwhp SLP longtubes that turned out to be a basket of snakes...

I am looking for a comparison of stock vs YT 1.7s.

 

I agree , those dyno results seem skewed, I can vouge that SLP headers do not ad 40 +RWHP and with all the hardships I have had when dealing with SLP I would not believe anything they say when comparing there product with someone elses. I would also be interested in seeing a dyno comparison of the YT rockers vs stock so bump.

 

I think the YT and J's are showing a problem with the springs vice just reading low. It really shows how the rocker is doing it's job compressing the spring where the SLP rocker is flexing and not working the spring. It's just a guess not knowing more about the condition of the springs or how big a cam it was running. But valve float comes to mind when I see that graph.

 

When I ordered mine from raging motorsports, they said they dynoed a car that picked up 8rwhp...but it wasn't across the board. The gains were mostly from 3500rpm to the redline. I believe the cam was a 224/228 if I remember correctly.

 

Yep, we have dynoed two cars before...left the cars sitting on the dyno while we changed the rockers to Yella Terras and picked up 7rwhp on an auto heads/cam car and 8rwhp on a M6 GTP heads/cam car.