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s10mk
08-19-2009, 07:43 AM
Hello,
I'm building a 350 TBI for my s10 truck, I was wondering; whats the maximum amount of lift I can run with the stock 350 tbi (L05) heads? I have an edelbrock 3704 TBI intake, comp cams extreme energy computer contolled cam kit(12-249-4) (.434 int/ .444 ex) and stiffer valve springs.

whitelightnin92
08-19-2009, 01:01 PM
you may not even need those springs for that cam.

killswitchfan13
08-19-2009, 01:07 PM
can you run that cam with stock valve springs?

s10mk
08-22-2009, 11:52 AM
I think I could get away with running that cam on the stock valve springs, but I'm gonna change them anyway because I want to be able to turn that motor up to 5000rpm; and that would be asking alot of the stock valve springs. But the only thing i'm unsure off is if the stock L05 heads can handle that much lift.

whitelightnin92
08-22-2009, 04:22 PM
I think I could get away with running that cam on the stock valve springs, but I'm gonna change them anyway because I want to be able to turn that motor up to 5000rpm; and that would be asking alot of the stock valve springs. But the only thing i'm unsure off is if the stock L05 heads can handle that much lift.

the heads are more than capable

XxST1TCHxX
09-02-2009, 01:16 PM
IIRC, .480 is MAX lift. im not 100% on that, but 99.9

def1
09-02-2009, 02:44 PM
.480 is max lift on the springs. I'd never run .480 of lift on those springs though even if they were brand new. With a good set of springs on unported l05 heads, you could easily run a zz4 or 845 grind cam. After porting and even better springs+screw-in studs....well I've come across a few guys with cams in the .555 range.

killswitchfan13
09-02-2009, 08:21 PM
http://www.summitracing.com/parts/EDL-2102/ if i were to put that cam in i would not have to change springs or rockers?

CFH92
09-02-2009, 09:10 PM
probably not but you will have to change the lifters and push rods if im not mistaken good luck

chevy thunder
09-03-2009, 04:53 PM
Shouldn't have to change pushrods either

killswitchfan13
09-03-2009, 05:06 PM
alright thanks guys i just wanted to know i am going to change the rockers at least but it might not be right away

CFH92
09-03-2009, 08:09 PM
dont even hav to change the rockers call eldbroc and ask what size push rods ull nee cuz im almost positive u have to change them

killswitchfan13
11-29-2009, 12:05 AM
http://www.summitracing.com/parts/CCA-K12-212-2/ so this kit will fit on the stock heads?

JoshTheCanadian
11-29-2009, 12:09 AM
TBI heads handle a MAX of .480. I would look into upgrading the springs though.

killswitchfan13
11-29-2009, 01:32 PM
TBI heads handle a MAX of .480. I would look into upgrading the springs though.
the springs that come with that kit wont work well for the tbi heads?

JoshTheCanadian
11-29-2009, 01:34 PM
the springs that come with that kit wont work well for the tbi heads?

they will work.

Im just saying stock springs wont handle over .480