Stock SRT10 Rocker Ratio

[2002_red_gts]

What is the stock ratio of the gen 3 (03 and up) Rocker ratio? Ive been told they where 1.73 but ive been doing some research and getting mixed answers saying there 1.7? Does anyone have the answer? I no its not to much of a difference but with my cam that extra .03 puts it right at .600' lift

 

[ssjcreeper]

1.7 is what I've always understood it to be though in conversation with Jon B recently... I believe he stated it was actually a hair under that but i don't recall what he told me exactly. 1.69 maybe.

 

[Allan]

I've heard 1.7 as well.

 

[2002_red_gts]

http://www.viperalley.com/forum/viper-discussions-gen-i/35509-jesel-1-75-rollers.html
I just found this post from John Hennessey

"The Gen 3 motor will respond to lifter and cam upgrades. Gen 2 cams are not compatable in the Gen 3 motor.

Rockerarms are a waste of time as far as I can tell. The stock Gen 3 has a 1.75 ratio. To bolt on a set of 1.70's would lose valve lift."

So know I really don't know

 

[Allan]

Thanks for the info............

 

[2002_red_gts]

Did anyone find the answer to this? How could you measure the stock rockers to find out what they are?

 

[ssjcreeper]

Mike,

I was curious what the ratio was after you posted this and asked around. The answer I got back was also 1.73. Here's a PDF I ran across from Crower when I ordered my new shaft-mount system. First page gives some info on determining rocker ratio.

 

[2002_red_gts]

Thanks! I'm pretty sure after looking around that there 1.73. Not that it makes a big difference just want to found out thank you for the info

 

[Viper Specialty]

I have seen everything between 1.7-1.75. The problem is, if the rocker isnt installed when measured, there is a long fulcrum tip to "guess" where the contact point is. I would assume this is the reason for the differences. However, based on what internal info I have seen from SRT over the years, 1.7 appears to be the actual spec.