Valve springs/ pushrods/ 1.6RR's and cam
Thread Starter
Registered User
Joined: Jun 2007
Posts: 337
Valve springs/ pushrods/ 1.6RR's and cam
Ive been looking for a bit of info....
see one of my freinds who is a tech-head knows mostly SBC stuff and doesnt know much about LT cars.... So I went on an online search and cant find any info about this particular setup I wanna run....
Was thinking about using the CC305 cam which is mild and streetable, perfect for what im looking for, whats the difference between a 112 or 114 LSA for this particular cam?
I have some Proform 1.6RR's waiting for install....
Then I was looking for springs/retainers.... I found some nice Lingenfelter Double valve springs with the following specs:
Pressure Height Rate
(lbs) (inches) (lbs/inch)
115 1.950 -
135 1.900 400
155 1.850 400
175 1.800 400
400 1.340 489
425 1.300 625
Average rate: 477 lbs/inch
Coil bind: 1.200 inches
Outer spring:
OD: 1.485 inches
ID: 1.070 inches
Inner spring:
OD: 1.080 inches
ID: 0.790 inches
Free length: 2.264 inches
Total travel: 1.064
Installed height: 1.950
Travel at installed height: 0.750
Was just wondering if these would be a good fit with the CC305 cam and 1.6rr's.
Other then that I was then having a few questions about pushrods. Im aware I should upgrade while im in there, Hardened pushrods. Now with using a cc305 and those springs, will I need longer pushrods at all, or will stock length work fine, and what is stock length? any suggestions for some budget pushrods?
are different lifters required? Should I upgrade to a double roller chain set? Should I spend some extra money and get some ARP rocker studs?
see one of my freinds who is a tech-head knows mostly SBC stuff and doesnt know much about LT cars.... So I went on an online search and cant find any info about this particular setup I wanna run....
Was thinking about using the CC305 cam which is mild and streetable, perfect for what im looking for, whats the difference between a 112 or 114 LSA for this particular cam?
I have some Proform 1.6RR's waiting for install....
Then I was looking for springs/retainers.... I found some nice Lingenfelter Double valve springs with the following specs:
Pressure Height Rate
(lbs) (inches) (lbs/inch)
115 1.950 -
135 1.900 400
155 1.850 400
175 1.800 400
400 1.340 489
425 1.300 625
Average rate: 477 lbs/inch
Coil bind: 1.200 inches
Outer spring:
OD: 1.485 inches
ID: 1.070 inches
Inner spring:
OD: 1.080 inches
ID: 0.790 inches
Free length: 2.264 inches
Total travel: 1.064
Installed height: 1.950
Travel at installed height: 0.750
Was just wondering if these would be a good fit with the CC305 cam and 1.6rr's.
Other then that I was then having a few questions about pushrods. Im aware I should upgrade while im in there, Hardened pushrods. Now with using a cc305 and those springs, will I need longer pushrods at all, or will stock length work fine, and what is stock length? any suggestions for some budget pushrods?
are different lifters required? Should I upgrade to a double roller chain set? Should I spend some extra money and get some ARP rocker studs?
Thread Starter
Registered User
Joined: Jun 2007
Posts: 337
While ive been searching ive got myself some answers...
cc305 at 112 LSA will net more HP gains while being more choppy (112 it is
)
COMP CAMS HI ENERGY PUSHRODS GM LT1 #7808-16 will be used (stock length)
The lingenfelter springs were designed to be used with the Lingenfelter 74211 & 74219 camshaft which are .560 lift hydraulic roller camshafts operating up to 6,500 RPM. Then since the cc305 cam is a .510 with stock rockers, it shouldnt exceed .560 lift with 1.6rr's.
then I was looking at lifters still....
cc305 at 112 LSA will net more HP gains while being more choppy (112 it is
)COMP CAMS HI ENERGY PUSHRODS GM LT1 #7808-16 will be used (stock length)
The lingenfelter springs were designed to be used with the Lingenfelter 74211 & 74219 camshaft which are .560 lift hydraulic roller camshafts operating up to 6,500 RPM. Then since the cc305 cam is a .510 with stock rockers, it shouldnt exceed .560 lift with 1.6rr's.
then I was looking at lifters still....
Thread
Thread Starter
Forum
Replies
Last Post
oldschool
Parts For Sale
16
Feb 9, 2016 09:21 PM