Sebambam

I would like to hear your opinion on a possible cam selection.

Specs
Motor: LQ4 , 862/706 Heads with cam matching springs, Sheet metal intake, 102mm TB, 1-7/8 Longtube headers
Trans: 4l80e two different converters available ...stock and a 2200-2800 Stall.
Weight 3100Lbs GM 72 A-Body
Rear tire Size 27,6 ( 305/40/18)
Purpose: Street, Pro touring, a car i can drive cross country if needed with AC BUT a good Muscle chop/sound!

Cams i am looking @
TSP 228R (112LSA)
Summit Pro LS Stage 3 (Sum 8708)
Summit Pro LS Stage 2 (Sum 8707)

is there is any input from you guys

G Atsma

I think SUM 8707 plus the 2200-2800 stall converter would be very flexible, have good low and midrange, and still lope good and proper!

Sebambam

Thanks that is the feedback i got from Summit, while a stock converter could be OK as well ( not perfect but ok)
BTW sorry its in the wrong section ( External Gen 3)

Kjduvall

I agree, the sum 8707 226/238 113 looks good for what you're doing. But a good 3600 stall will work magic for you. Don't fear the stall.....

G Atsma

You're good. At least you got the Gen III part! LOL

G Atsma

At least nowadays the trannies can lock up the converter for efficient cruising. Win-win!

Sebambam

Nobody likes the tsp 228R?

G Atsma

Old school grind...

Sebambam

I see
So I guess summit stage 2 it is for me
Btw after talking to summits support I will also use my 317 heads and get a valve job+.30 mill instead of 862s

Fast355

Use the 862s. I have done two of them with 862s. One with 0.020" milled 862s and the other with milled, lloyd elliot ported 862 heads with 2.00 intake valves. In stock form the compression increase makes more of a difference than the slight flow difference.

Sebambam

I see Im in Duncanville TX i want to bring my heads to Lloyd anyways for a valve job.
how much did the portjob help you?

Fast355

Not exactly sure because I never ran that vehicle with a 6.0L before hand. It was a gutless 305 TBI.

I do know Lloyd gets those 862s up to about 300 cfm out of the 2.00" intake. Between the compression and flow I am sure the 6.0L gains 30-40 hp from Lloyds ported 862s with torque gains from idle.

The 1st LQ4 is in an 87 G20 van. Has a cam motion lil chopper hotrod cam, NNBS intake, speed engineering C10 swap shorties, and electric fans backed to an 80E and 3.08 gears. It is on 275/60R15s and will spin them practically on command anywhere in 1st gear. My mom took it on a road trip over a month ago and is still gone in it. She calls it her "gypsy" van. She said it gets 18+ mpg like clock work.

​The 2nd engine got a 228/230 cam, the milled but otherwise stock 862s with double springs and Rhoads Original lifters at the same time. HUGE difference compared to the stock LQ4 long block.

It is in a 71 GM A-body with a 4L80E, stock B82 converter and 4.10s. Car is on 325 drag radials and has no problem spinning then on the street.

I would let Lloyd do up the 862s and then spec your cam. He is a cam retailer for two different cam companies. Lloyds cams always seem to sound aggressive, have good manners and make good power. I have tuned a couple of his LT1 setups for people. Never fail to impress me.

Fast355

One other thing that was a good improvement was a 4" air intake and 100mm MAF.


I started with the Lingenfelter MAF tables. Worked great as a starting point using the 2007 LS7 Hitachi MAF0034 from RockAuto. Spectre housing with a 6:1 screen.

https://www.google.com/url?sa=t&sour...MmaaVhTHITUMvN

Sebambam

I just dropped of my heads at Lloyds.
Very nice guy, and he obviously knows what he is doing... i brought him both options (317 and 862) and he also recommended the 862 based on the compression.
So i will get a full port job spring install .20 mill and valve job... the full package.
I have to say very reasonably priced.
Im excited. This heads will definitly support my goals

Btw i sent you Fast355 a PM as well.

SoCalDave

The LQ4 is in a '72 A body, so choose whatever cam floats your boat. I stayed with the stock cam in my '01 Camaro since I'm in Cal. Even with a stock cam I'm sure that LQ4 is going to be fun.

G Atsma

If the LQ4 is 2001 or later, it has a halfway decent cam in it compared to earlier ones.
The earlier cam is the same as the LM7 5.3, which is191/190, .457/.466, 114LSA
The later cam which is shared with the LQ9 is 196/201, .467/.479, 116LSA

Sebambam

I will do a cam fir sure. It's just to easy to make decent power.
further I dropped the 862 heads of to port and valve job. As well as a compression bump mill .20.
I have some "left over" parts such as a sheet metal intake and headers anyways so there is no reason to not used them.

I only think about if I should go.
swap harness and pcm tune?
mailorder tune? do you guys have a good source for a standalone harness and pcm tune?
or
Holley terminator x? Since I have a 4l80e I have to go with the max.

SoCalDave

That's true that the '01 and later cam is good enough until time or funds allow.

Sebambam

its a 02' but come on a summit cam it s 298$ and they awesome. The truck came can be run on stock lifters and springs . The gain is great for a 300 $ investment so why wouldn't you.

G Atsma

I agree with you! I didn't know what your budget considerations were.
BUT tagging onto what you say above, get a cam with more than .500 lift and put some good springs in. The old springs are likely worn for even a stock cam. Don't do this 1/2 way...
Oh, and lose the sheet metal intake. They only make power on the top end and lose everywhere else.