qnitro

iTrader: (24)

Hate to ask, trade secrets and all...

But what all have you done to the motor?? Im have a 2001 5.3, Im getting ready to drop in my 1966 GTO. I love the sound of the cam.. Sold Im buying it.. What springs and pusg rods did you use?? what esle is one the motor?? Intake and such. If you have it some where else posted please send me the link.

Im also thinking of picking up another 5.3 for my 1976 Trans AM... These motors are so cheap its hard to pass them up at 400 bucks..

louisianagulf

Basicly nothing but the cam, headers and Flowmasters. I need to upgrade my clutch. The intake can be purchased at GM and or Edelbrock. They have a few to choose from and they both use the MSD controller. Edelbrock even has a dual four setup. Something I would love to have.

70lx327

there are 3 different thumper cams. i would call them stage 1, 2, or 3 as far as lift goes. which cam is this? I am debating between the stage 1 and 2 for my 5.3 chevelle

louisianagulf

Stage 1 Thumpr

Stage 2 Mother Thumpr

Stage 3 Big Mother Thumpr


I've got the Stage 1 Thumper. Stages 2 and 3 require pushrods and springs.

www.riverridgehotrods.com

qnitro

iTrader: (24)

So you didnt change the springs/lifters or push rods???? I know you said its a carb set up..

What HP you think you got?? Thanks for the answers... Im really interesed in what you did..

Ahhh we were posting at the sametime... your last post answered my question..

71 chevelle

iTrader: (13)

Qnitro, (its Fabian from PT I bought the gto seats)

If you are going to run a 5.3 run the mother thumper also change out the springs and push rods. its cheap insurance on any build. I am have the ****** thumper for my 6.0l

qnitro

iTrader: (24)

Hows it going.... Im looking at some PRC 2.5 heads with springs and such, I will call comp to get the right push rods too... I have all of it with a LS6 intaks and 80mm TB. Im hoping to get to the magic 450ish with the tune..

I do need to know what converter to run... this is for my GTO, and Im putting in a 4l60E. I am also building another, 5.3 motor, same configuration, but going to run a 6 speed in my 1976 Trans Am...

louisianagulf

As I stated before the pushrods were changed. All Thumpr cams require they be changed. I did not change the lifters because of the low milage of the engine.

www.riverridgehotrods.com

sixt9er

iTrader: (2)

Do these cams require a "shorter" or "longer" pushrod? Or do they just require a more robust pushrod?

louisianagulf

Its longer and is required. E-mail Mike with Comp Cams for details on your application. I met him at Cruisin the Coast last year in Mississippi. Good guy.

mmclaughlin@compcams.com

qnitro

iTrader: (24)

I just emailed mike over at comp cams... I asked for all the part numbers for lifter, cam and push rods, I will share as soon as I get a reply. Thanks to louisianagulf for being patient with us and our 20 questions...

louisianagulf

Let me know how you make out. The install is a piece of cake......at least it was for my car.

70lx327

good to hear, this is exactly what i am going to put in my 70 chevelle. 5.3 with the thumpr cam and a carb setup.

louisianagulf

This site helped me quite a bit. Also took a few pics during the install.

http://www.ls1howto.com/index.php?article=23

70lx327

did you actually use the thunder racing lifter tool or can any long device be used to hold the lifters up.

Thanks for the info. I am pretty "green" at engine work but have some good friends to steer me the right way.

louisianagulf

5/16 wood dowel..... grease it up first $1.49

Read everything on the how to site a couple of times before hand. Like studying for a test. Have your PC or laptop handy if possible. Be careful with the oil pump pickup tube. I read it over for a month before I installed mine.


www.riverridgehotrods.com

qnitro

iTrader: (24)

Here is what I have so far ( I never heard back from Mike at comp cams so I called summit)

COMP CAMS HI ENERGY LIFTERS CHEVY LT1 LT-1 LT4 #850-16

COMP CAMS GM LS1-LS2-LS6 THUMPR CAMSHAFT #54-600-11

COMP CAMS MAGNUM PUSHRODS 7.400" LENGTH, 5/16" #7638-16

It looks like 680 bucks total shipped, not including gaskets.

Im still looking for some cheap(used) prc 5.3 stage 2.5. I have the LS6 intake with ported TB. I also bought a gasket kit with ARP head bolts. Im looking to get minimum 400 rwhp out of this. I will be having a custom tune. I will keep you abreast LOL, I said breast

70lx327

I don't think you have to have the lifters but the beehive springs.

qnitro

iTrader: (24)

Im getting the PRC 2.5, with the .650 springs.. Im going to replace the lifters as a safety precaution.

Its crazy, im building this motor a 5.3, and I got a LQ4 too.. MADNESS I SAY

louisianagulf

Here are some articles and info that may help some of you.

http://www.popularhotrodding.com/tec...ls1/index.html

http://www.carcraft.com/techarticles..._manifold.html

http://chevythunder.com/LS1%20compon...20ID%20Numbers

http://www.smokemup.com/tech/ls1.php

www.riverridgehotrods.com