5.3 cutty

iTrader: (2)

i have a 5.3 in my 87 olds cutlass just broke it in. im running a z06 cam with gto ls2 243s milled 40,xxx with yellow sprongs a ls1 intake and 78mm throttle body.this cam is not going to cut it so im looking for the biggest cam i can run with stock lenght on a stock or small stall in a 4l60 tranny.10 bolt rear with posi...updates may include ls6 intake or ported ls2 intake 80mm tb. any advice will help me out alot. thanks in advance.

A.R. Shale Targa

iTrader: (2)

Crane has a new direct replacement line of cams for production valvesprings
but I'd stay in the 210-216 duration range since you seem reluctant to put
a 2800-3200 stall converter. An ls 6 intake would be worth a few ponies as
well but a converter would be the single biggest improvement to your combo

5.3 cutty

iTrader: (2)

i think i could live with a 2800 - 3200 stall.

96capricemgr

iTrader: (1)

If not willing to do a converter don't bother doing anything else.

If you are worried about the drivability of a mild 28-3200 stall then your ideas about what a stall is are DECADES behind the times.

96capricemgr

iTrader: (1)

Also have you checked to see if you have room for the truck intake? Almost as good as the LS6 and a whole lot cheaper.

Sales@Tick

iTrader: (3)

Torquemax stage 1 is my choice. 223/227 .61x/.61x 111lsa only has 3 degrees of overlap so it will still drive nicely while keeping a decent lope at idle and making maximum under the curve power.

You'll need hardened push rods and our BTR dual spring kit. 2800-3200 stall is perfect.

5.3 cutty

iTrader: (2)

I all ready have pushrods just need the springs.can I keep the 7.4 pushrods?

sreve

iTrader: (3)

Doubt it after cutting the heads .040

5.3 cutty

iTrader: (2)

I have 7.4 with the heads milled running with no Valvetrain noise.

Sales@Tick

iTrader: (3)

IMO you've got way too much push rod in there and that can cause some serious issues all on its own. Lifters are something that are seldom thought about it seems, and IMO they are probably one of the most important parts of the valve train. The lifter acts as a medium along with the push rod between the camshaft and the part of the valve-train that actually opens and closes accordingly to the actuation of the camshaft and lifter.

You don't want to upset that medium that's for sure, and I guarantee they are not happy right now with that much pre-load.

I'd highly recommend measuring the push rod length and adjusting it accordingly.