Are my comp 921 springs costing me power w/ my EPS cam?(single v. duals debate)
11-26-2012, 11:13 PM
#1
Are my comp 921 springs costing me power w/ my EPS cam?(single v. duals debate) It's late and I'm not quite sure I thought of this but its something that I have always wondered.
I have a 00' Firehawk with an EPS 226/230 .598/600 lift on 112+2 LSA cam. TEA 5.3 1.5 heads, FAST 92, LT's, blah blah.
When I gathered my parts I ended up with a set of Comp 921's. I went with duals because at the time( I didn't know any better) I was afraid of running a single spring and it breaking.
Every once in a while I see a thread or post about how single springs are better in some cases than dual springs due to harmonics.
The car put down 430hp/420ft lbs with serious valve float and a slipping clutch. Now that I have both issues fixed the car is a beast compared to what it was when it put those numbers down.
I am at the point I need bigger injectors and with the prior problems I had I am going to get it retuned. But I only want to have it done once.
Is there, would there be any benefit going to a single spring compared to a dual?
I'm going to call Geoff@EPS but I won't be getting it tuned for a while and wanted some opinons first.
Thanks for any input or experience.
J
I have a 00' Firehawk with an EPS 226/230 .598/600 lift on 112+2 LSA cam. TEA 5.3 1.5 heads, FAST 92, LT's, blah blah.
When I gathered my parts I ended up with a set of Comp 921's. I went with duals because at the time( I didn't know any better) I was afraid of running a single spring and it breaking.
Every once in a while I see a thread or post about how single springs are better in some cases than dual springs due to harmonics.
The car put down 430hp/420ft lbs with serious valve float and a slipping clutch. Now that I have both issues fixed the car is a beast compared to what it was when it put those numbers down.
I am at the point I need bigger injectors and with the prior problems I had I am going to get it retuned. But I only want to have it done once.
Is there, would there be any benefit going to a single spring compared to a dual?
I'm going to call Geoff@EPS but I won't be getting it tuned for a while and wanted some opinons first.
Thanks for any input or experience.
J
Last edited by LilJayV10; 11-27-2012 at 12:11 AM.
11-26-2012, 11:33 PM
#3
The valve float issue was because the machine shop set the install height at 1.81 instead of the 1.72 they should have been at. With a lot of help from Shane@Thunder Racing(who was awesome to deal with)let me know I had valve float, which I didn't know I had and said to check my install height. He was right and it was off by about .090.
