Hey guys.

The car this is going in is a 69 ElCamino, 4L60, 373 gears. Converter TBD.
The goal is mid to high 11's. if it doesn't do this, it will get a turbo and 317's. But NA is the goal.

I'm building the engine and tuning it, so I have a vested interest.

This is the intake he already bought:

https://www.summitracing.com/parts/sum-226122b-k

Summit brand fabricated midrise with a 92mm TB

Will have 1 7/8 headers

Freshened stock bottom end

Based on the perf of my C5, I had an idea about where I thought the cam should be.
225-228 intake
7-8 degree split
.600 lift
113-114 lobe sep.
Shooting for less than 5 degrees of overlap at .050 just to make my tuning job easier. Stock ECU

About went cross-eyed looking at Cam Motion, Comp. Tooley and Summit cams. Budget is a consideration.

Ended up thinking the Summit 8707 fits the bill even though the split is quite large. 226/238 .600 113+3
Should tune easy as long as that Summit TB doesn't fight me.

So tell me what you think. And if you have a better suggestion, fire away.
Built both my cars 8-9 years ago, both are custom grinds. The LS cam scene has changed a lot since then.

Ron

 

I done a stock bottom LS1, untouched 241s basically just bolt ons, ls6 intake, torquer V4 231/234 I believe, 3600 yank, 373s and 4l60. And I had no trouble at all tuning it. Cracked the throttle blade got iAc counts in line and other than the converter it drives like stock and ran 11.7x in a full weight 4 point caged fbody with a crappy 1.7 60ft. I would imagine the 6.0 would be even more tame. Idk about that intake though.

 

Ditch that intake please. Personally for street car that’s going to see what 6500 rpm don’t waste the time with that I take. Do a fast 90/90 intake at the very least If money is an issue. He will thank you and you will thank yourself. Cam wise I think you are in the ball park

 

Hey Ron,

In regards to what you are trying to accomplish, I have been there and done that. In fact, I went through multiple iterations and I can tell you exactly what my results were. Also, I am the head of product development at Cam Motion, so I can also any questions you may about camshaft application.

First, let me share a few specific combos with you and the results they generated:

Combo#1
65 Skylark #3700+ pounds
Junkyard SBE LQ9 6 Liter
CNC ported 243 casting heads
10.8:1 compression
Edelbrock Performer Intake
750 Holley Mechanical Secondary
1 3/4" long tube headers
221/222 duration .568" on 112+2 camshaft (Similar to our Titan 2 LS1 camshaft)
Th200-4r transmission with a 2.74 first gear
2800-3000 stall
3.90 rear gear
275 drag radial rear tires at the track
ET 11.76 @ 113 MPH
NOTES: This camshaft had a pretty smooth idle with no noticeable lope. The car felt like it had power everywhere from idle to 6800 RPM. Tons of idle vacuum, idled at 650 RPM and I would have driven across the country without hesitation.

Combo #2
65 Skylark #3700+ pounds
Junkyard SBE LQ9 6 Liter
CNC ported 243 casting heads
10.8:1 compression
Edelbrock Victor Jr, heavily ported
750 Holley Mechanical Secondary
1 3/4" long tube headers
226/234 duration .600" on 110+2 camshaft (Similar to our Cam Motion 227/237 Hotrod camshaft)
Th200-4r transmission with a 2.74 first gear
4000 stall
3.90 rear gear
275 drag radial rear tires at the track
ET 11.04 @ 121 MPH
NOTES: This camshaft had a defined lope at idle and a very satisfying hotrod sound. This camshaft had plenty of vacuum to run power brakes and the power curve really did not feel much different than the 221/222 camshaft, but it did make more power. The 4000 stall felt pretty loose and gave the car more of a street strip feel, but I still drove it everywhere.

Combo#3
65 Skylark #3700+ pounds
Junkyard SBE LQ9 6 Liter
CNC ported 243 casting heads
10.8:1 compression
Edelbrock Victor Jr Intake heavily ported
750 Holley Mechanical Secondary
1 3/4" long tube headers
235/247 duration .648" on 110.5+4 camshaft (Basically a low lash solid roller version of our Junkyard Dog camshaft (232/244 on 111+4))
Jesel Shaft Roller Rocker arms 1.7 ratio
Th200-4r transmission with a 2.74 first gear
4000 stall
3.90 rear gear
275 drag radial rear tires at the track
ET 10.83 @ 123 MPH
NOTES: I was in love with this camshaft. The idle sounded amazing and the midrange torque was ever stronger than the 221/222 and the 226/234, but it RPM'd much better. It still have plenty of vacuum to run power brakes and drove really great. For me, this was the most fun iteration of this car. I probably had more fun in this car with this engine than I did with the 700HP stroker.

 

With that intake, you will give up power below 6000 RPM for the potential to make more power over 6000 RPM. It is a lousy trade for a stock bottom end street car where drivability is a concern. However, I do understand the desire for a certain appearance. The FAST intake, TBSS truck intake or even an LS6 intake is a great choice for what you are doing.

From a power standpoint, based on what you have said, here is what I recommend:
Get one of the intakes recommended above
Find some 243/799 heads if you can. The compression increase will make more power everywhere.
Use the Cam Motion Titan 4 LS1 camshaft. This thing just works. It is our most popular selling camshaft for a reason. Power everywhere, easy to tune and drives wonderful. If you want to go a little more aggressive, step up to the Titan 5 (232/238 on 113+4).
I personally like the way a 3000 ish stall drives, but a 4000 stall will be about a tenth to 2 tenths quicker in the 1/4 mile.

I absolutely understand the desire to save money. Everyone does in this hobby. But, the increased compression of the smaller combustion chamber heads will be a benefit. And, please consider supporting the people who have worked so hard to advance the technology and progress of the LS community. We do appreciate the business.

 

Friend of mine, 64 Post used the Ls1 Titan 4 with that same intake, 5.7, ported 243s, turbo 350 2800 stall and
3.55s in a a fox that ripped.

The Titan 4, with 11.0:1 comp and 3200 rpm stall would be my suggestion for any street driving as well.

 

Thanks speedtigger,

I remember you from the Chevelle Tech site back when you first adopted the LS platform.
I was, still am, Ron454 over there. Had a 498 in my Nova that ran high nines NA on pump gas.
The 5.3 turbo I have now runs away from the old rat motor.

Agree with you ALL on his intake choice. I had no clue he bought that. I've tuned all his LS cars, and he still won't consult with me on the parts selection.
So I'll point this out to him.

The Titan 4 BTW was my first choice I forgot to mention that after the cross-eyed search.

He does have 243 heads that are in for a 4 angle valve job. Slight surface etc. Already have dual springs.
I suppose I could do the simple porting improvements, I've done a few sets. Very time consuming.

His wife is going to drive this car, so it needs to be nice to drive. If it isn't she will bitch!

I'm also building an LS1 for my son's S10. Titan 4 and the TBSS are the plans for it. I will port the 799 heads, make it 11.5:1
He has a 4000 stall. It's a 2800 lb truck with a small block. Be even lighter with the alum LS1. Should run very well.

Appreciate the comments!

Ron