HioSSilver

iTrader: (8)

Idk if those earlier year cummins really even out performs a 6.0 gasser.

I have a dmax with a blown h/g. I bought it that way with intentions on fixing it. Really driving it around a little now and then to keep **** working and the battery charged you wouldn't even know it. But it pressurizes the rad.

andy burdess

Look into summit truck cams. They produce lots of low end grunt for a great price. I’ve got experience with a few of them and they have done a great job with them. They all will require tuning though. Also a good upgrade for torque would be to ditch the 317 heads and find some 862s or 706 5.3 heads. Increasing the compression ratio is a huge step forward in increasing low speed torque production. A set of 799s would also be great but people seem to value these higher. You can buy 862s all day long in great shape for 100 bucks.

ezstriper

the engine I'm doing has the later 10-1 flat top pistons, not sure want to go much more than that to run on 87

G Atsma

You are right. You don't want much more at all for 87.

andy burdess

Ah yeah probably not then. Do you have e85 in your area?

bortous

Something like a 219/227 113 LSA +3 will give you great low end torque and a nice idle.
Being at -3 degrees overlap means a stall converter is not required.
This will give you what you are looking for.

G Atsma

A bit more civilized than the GM Hot Cam. I agree, would be a good runner with good manners.

tech@WS6store

iTrader: (2)

You want more torque to 4 things with the cam

1. Keep duration mild on both intake and exhaust
2. Keep a fairly advanced icl like 107 to 109
3. Keep lsa narrow
4. Add lift

This is exactly why a cam like the stage 3 high lift from tsp is the best at what youd want to do. Itll still have negarive overlap but a noticeable idle and make some great bottom end and mid range. I have a dyno graph comparo i post all the time showing the difference in lift and duration of 4 cams the higher lift adds power and torque through literally the whole rpm plus adds a couple hundred rpm on the top end.

There are obviously other things to do with the engine, but as far as trying to match that idea up with any ls6 car cam, they are terrible at all of that. Super wide lazy lsa and weak lift.

ezstriper

we do...have been racing on it for 7 years now...car in signature, have no desire to run in a reg driver though

Che70velle

iTrader: (6)

I recently finished up a 6 liter for my brother. He tows a lot. 99’ Silverado ext cab 4x4, so a heavy rig. Went with a 219/230 .607” .603” on a 114. Tony helped me with the spec and had it cut by Comp. Runs very strong everywhere and pulls great. 10.56:1 compression and GMPP LS3 heads with LY6 intake. .030” over and offset dowels on the heads. Combination is everything. Very happy with this setup for the application.

bortous

I see you mentioned the .030 offset dowels.
It just reminded me I need to speak to my engine builder about this.
Do you know if this offsetting will cause any clearance issues with the heads or intake manifold?
It won't affect sealing?

Che70velle

iTrader: (6)

The offset dowels have not affected any manifold alignment on any square port engine I’ve ever used them on, but I always mock up my stuff before assembly and check everything. No sealing issues for me.

bortous

Ok good.
So when you offset the dowels does it change your bore size?

G Atsma

How would it? They only move the head over the amount of the offset.

Che70velle

iTrader: (6)

I use same head gaskets.

andy burdess

Ah nice. Good luck with the build man

garygnu

figure you static compression .then start plugging camshaft timing event to get your dynamic compression .the lower lift cams are nice to valve springs and the geometry is easier to attain.the higher lift cams help with more better air flow ,more dynamic compression ,at the cost of better springs .