IDRIVEAG8GT

I haz a G8. That close nuff? Just kidding

PwrdbyLS1

iTrader: (5)

I have a 227/235 .639 .621 114LSA+2 in my 404ci, check my sig.
It got a lot of torque in the street, very fun but I'll check for a bigger one, for more HP and better track result.

I had the same cam in my 6.0, check the dyno result here: https://ls1tech.com/forums/dynamomet...s3-intake.html

oakley6575

iTrader: (3)

So this morning I got a custom cam recommendation from Patrick.

231/239 .598”/.610” 114LSA +2 advance (with 1.7 ratio rockers)
Comp HUC/HUC lobes 54-000-11 3 bolt cam core
13045R/13049R HR114LSA +2 advance (112 installed intake centerline)

Sounds right along the lines of what I was thinking. I've never heard of HUC lobes though. Anyone running those?

Ragtop 99

iTrader: (7)

There in Comps 2011 catalog on page 433. There description is:
The HUC series hydraulic rollers are very smooth designs intended for high rpm use with heavy valves. These are very similar to the Xtreme Marine™ High Lift Lobe series but are slightly more stable.

However, I did not see the specific lobe # listed.

trans_am7935

iTrader: (15)

if it helps i am gonna be running this cam

227/235 .614/.624 113+3

i was suggested this cam for my heads and cam street car/autocross car. makes great torque for the LS1 and was actually designed for the 5.3 motor. the 231/239 LSR cam was actually designed for the 5.7-6.2 motors. so i think you should go with the 231/239 for best TQ/HP combo on a street driven 408

disc0monkey

iTrader: (10)

is that 231/239 on a wider LSA? for a street car i would look into keeping the LSA above 115. pontiac gurus have tried all different LSAs but after 40 years of experimenting with cams they are returning to 115+LSA on their street/strip cars, claiming pontiac had the right idea with the RA4 cam being very aggressive and a 117LSA back in '69. the average power(area under the curve) and good manners will still kick it on the track. keep in mind the LS7 is pretty dam close to a Pontiac 428 so idk i think its pretty interesting

BlackBirdDaddy

iTrader: (16)

Sooo, what cam did you finally decide on and are you happy with it?

oakley6575

iTrader: (3)

I'm about to start my build any day now. I decided to go with a 231/239 113LSA. Not sure to keep the advance at +2 or +3.

LS6

some of the gents with the 6.0 block and the L92 head are making almost over 500 rwhp, and from what I see of your setup, I think you will be making easly 470 to 480 rwhp

oakley6575

iTrader: (3)

Yea the goal is 500rwhp somewhere down the road. After a port job on the heads, fast intake, and minor touchups, I think I can reach it. I'm going to build the motor with stock LS3 heads and intake, and see where that puts me.

Samer

I would love to see the dyno results of your combo with this cam

Rassie

I would like to know your progress and results. I am currently working on my 408 Stroker motor.
I have a LS2 NA motor that I installed a K1 crank and conrods (4" stroke).Wisico+5cc pistons.(4.030) Compression test 240psi.LS3 ported heads (821 casting) and intake.Standard 90mm TBZero piston deck clearanceCOMP Cams Ultra Pro Magnum Rocker Arms 1678-16 (1.8 ration)Manley NexTek Valve Spring and Retainer Kits 26362134KS (Dubbel valve springs)Long headers with 76mm pipes OTR Air intake.
want to install a cam for drive ability and low down torque
Looking to use the Comp cam 54-458-11 In Lift 0.614 (1.8 ration 0.650) Ex Lift 0.621(1.8 ration 0.657). Duration 227 / 235 LSA113.
Any HP comment or advise will be appreciate
Thanks appreciate.
Rassie

Mavn

iTrader: (3)

Its been 11 years. He's not posting his progress LOL

G Atsma

Hey Mavn! Where ya been man? Good to see ya back!

99 Black Bird T/A

iTrader: (4)

Hi Rassie, as noted it's an old thread.

What's your 402 going in?
Use? Weight? Transmission? Rear gear?

All of that is a big factor in cam choice etc.

For a 402/408 in the typical 4th Gen fbody ~3,500 pounds with (4L60e, 3600 stall & 3.23+ gears) or (T56 & 3.73 gears) a 227/235 cam 115 with 1 degee of overlap isn't what I'd want.

Here's a list of Cam Motion - LS Stroker Camshafts and Summit Racing camshafts cam-motion-ls-stroker-camshafts that are worth checking out.

One of the Stealthy Stroker cams like Rectangle Port 230/242 117 cam with only 2 degrees of overlap should drive nice in a 402 and make very good power. I think the later intake valve close at 50 etc is more suited to the 4 inch stroke engine.

I'm sure Cam Motion or Summit Racing would be happy to help with BEST cam selection for your combo.

Rassie

Thanks for replying. I really appreciate. My 408 in going in my Lumina ss ute.
1613kg. 3556Pounds3.45:1 Diff ratio.Street strip low down torque. Between 0 and 4000rpm.
THanks for your time and advice appreciate. I am new with the 408 and cam selection.
Thanks Rassie

99 Black Bird T/A

iTrader: (4)

Lumina ss ute? WOW! Those are seriously cool!


LS stroker engines are a whole lot of fun!

@Summitracing hopefully we can get one of the cam experts to help with cam suggestions.

Rassie

This is mine. I am currently looking at the Cam motion selections. Thanks appreciate

Rassie

Summitracing

@Rassie,

Your Lumina SS Ute looks pretty neat!

Onto a camshaft for the 408 going in your Ute! We like @99 Black Bird T/A recommendation. The Cam Motion CXM-03-01-0033 "Stealthy Stroker" would be a good fit for this combo. Specs on it are .621/.604, 230/242, 117+5 with 2* of overlap. With 1.8 rockers the lift would be .658/.640. Those Manley springs have a .660" max lift so your right at the max lift limit for those. It will have a noticeable lope but with 2* of overlap, it will be easy to tune and get along with. The extra cubes are going to help your low-end torque and increase peak torque likely lower in the range.

Another option we're thinking of is one of our Pro LS cams. We actually just recommended this for another 400+ C.I.D. Rec port stroker application that wanted good manners. Take a look at our Pro LS Automotive stage 2 cam SUM-8707R1. Specs on it are .600/.600, 226/238, 113+3 with 6* of overlap. With 1.8 rockers the lift would be .635/.635. It has a steady lope but tunes well and is easy to live with in a 5.7 or 6.0. A 408 will eat up that 6* of overlap and be easy to get along with for daily driving. It has a wide powerband and will stretch out to 7,000+ with dual springs such as TFS-2500286P or equivalent.

The intake valve closing (IVC) is basically what sets the powerband. It's building compression and torque down low by closing the valve early. Or using inertial charge longer after BDC and closing the valve later to increase power higher in the rpm range. For comparison, the Cam Motion cam has a 47* IVC whereas our 8707R1 has a 42* IVC.

You'll want some upgraded pushrods. We always recommend measuring for pushrod length before purchasing pushrods. If you don't already have a pushrod length checker we offer the Trickflow TFS-9501. For pushrods, we recommend a minimum of a 5/16" Chromoly pushrod with a .080" wall. You can typically find a set of 16 for around $100. From there you can get into a thicker wall or larger diameter pushrod. For excellent stability and strength check out our 11/32" HDR pushrods with a .120" wall. These have 25% less stress and 28% less deflection than a typical 5/16" x .080" wall Chromoly pushrod.

Let us know if we can be of any further assistance. We'll be happy to help!