Ls6 Camshaft Swap

[duc1256]

(newbie, First Post) Sorry If This Has Already Been Answered, But I Searched For 3 Days And Didn't Find An Answer To My Question. I Am Putting A 2004 Ls6 Camshaft In My 5.3l(stock, Other Than A Cai, Electric Fans And Nelson Tune)i Need To Know If Different Length Push Rods And Valve Springs Are Needed To Properly Install This Ls6 Cam. If So, What Is The Length And Brand Of These Two Parts. Thanks In Advance, Nicholas

[NYAFACE86]

has far as i know, its just of taking the your 5.3 cam out and putting the ls6 cam in.. but i am going to be putting the ls6 cam too in my 5.3l, ill be changin the timing set for a new one, and just putting in new lifters just to be safe, since my truck has 116k on the clock... but no you shouldnt need nothing change but just be safe just change out the parts you know that should be a maybe down the road... i prob put new rockers and rods too if i port my heads... most likely! lol good luck man!

i still have to find a ls6 cam, i have a ls1 tho.... lol.. going to sale that cam since i changed my mind lol... this will always happen

[LS1GMCTruck]

Let us all know how the installation goes & how it performs!

[randomhero]

Not sure how to put it nicely, but that's not true, and I hope you both don't do that.

The ls6 cam will REQUIRE new valve springs. The 02-04 has .550 lift and the stock valve springs can't handle that.

As far as the pushrods. 7.425 is optimal since the ls6 cam has a .050 smaller base circle, but I know of plenty of people who have ran the stock 7.4 and never noticed a single issue.

Basically long story short you'll really only need the cam and springs.

[GasGuzzler]

Yeah, what he said. Don't keep the stock springs. Also plan on possible bent pushrods if the current tune allows 6000 RPM shifts that you need to make that cam sort of work in a stock 5.3.

[NYAFACE86]

i figured the springs would have to be changed and i knew about the rods too, but i heard it doesnt have to be changed since its not really a problem... but i forgot to mention the springs! lol but i have a question if put this comp cam for the ls6 these are the specs Intake Exhaust

Gross Valve Lift .605 .613 (Lob Lift .3560 / .3610)

Duration @0.050 238 246

Duration @0.006 287 295

Lobe Separation 114.0



do i need to do any else? i know its not the stock specs , so do i have to get or do something else to insure i dont mess anything up once i put this in?

[NYAFACE86]

COMP CAMS GEN III/LS1/LS6 Xtreme Energy XE-R Camshaft
Part# 54-000-11
Serial # K 7332-007

Specs



Intake Exhaust

Gross Valve Lift .605 .613 (Lob Lift .3560 / .3610)

Duration @0.050 238 246

Duration @0.006 287 295

Lobe Separation 114.0


it states its the most aggresive let me know

[randomhero]

LOL, you put that cam in your truck, then you better run a 4400 stalling torque converter and forget about ever driving it on the highway.

[RedHeartbeat]

no way with that cam. You need some springs good for up to .620" lift. Double check the new revised 918s, they take more lift than the earlier ones ansd they're still the beehive design.

BTW, thats about the same cam I run and I drive it on the highway all the time with a 3500 stall. Just made a 630 mile round trip to SanAntonio Friday with mine.

[randomhero]

no way with that cam. You need some springs good for up to .620" lift. Double check the new revised 918s, they take more lift than the earlier ones ansd they're still the beehive design.

BTW, thats about the same cam I run and I drive it on the highway all the time with a 3500 stall. Just made a 630 mile round trip to SanAntonio Friday with mine.

You're also running a 408 stroker setup right? You've got 83 more cubes than us 5.3L guys.