[11MPG]

I'm I a poser? Kinda. I have a Thumpr Cam. 219/233 with a slobbering 109 LSA. In the end though I'm happy. I get to sound like a pro stock yet I still have low end torque and don't need to shift at nose bleeding rpms. Long story short it's still fast. Heads are from Trick Flow and it has a TB SS intake manifold.

I'm interested in losing the 150 nitrous shot and installing a Trick Performance Stage 2 turbo system. Nothing crazy. 7 to 9 pounds maybe. (4L60e and 10 bolt "yikes") My question is this. Do I have to lose the cam cause of the 109 LSA? Yeah I know "a custom cam is better and I'm losing potential power" but it's still a Suburban, and if I wanna go fast I have a 2011 Charger that runs 11s.

End game is I'm lazy. Can I make this work?

 

[DirtyBlackHD]

People on here put way too much sole emphasis on lsa. A 109 on a 219/233 does not have the same overlap as a 234/245. You need to look at overlap which is duration and LSA. Ie a 219/233-109 overlap is (219+233)/2-(109x2)= 452/2-218= 226-218= +8deg overlap.
A 234/245-109 is 479/2-218= 239.5-218= +21.5deg overlap.
Moral of the story, just picking a cam based on LSA is wrong, and a festering misunderstanding on this forum.

What you really need to do is 1. Do a full spec yourself or 2. Pay someone else to do it. Off the hip, that cam will not do a turbo justice. Likely, you may want intake>exhaust, among other things. I'd also factor dynamic compression, boost level, static compression, power band desired, quench, lobe profile characteristics, and lastly the lift range desired.

The process i use for DCR is input the fixed information like CC, displacement, SCR, desired rpm. Then pick an intake duration for desired DCR and rpm band. Then pick an exhaust duration with fixed info, then figure how much overlap i want, which points to LSA required, then possibly advance, and lastly desired net lift which dictates lobe profile.

Is this a 5.3? What size TF heads? Ported? Whats your SCR? How much boost? What valvesprings?
Again, off the hip, I'd be in the area of a 228/228, 610/610-115+4.
Just to ballpark,
Tick's turbo stage 2 for small engines (<400")
Tick Performance Turbo Stage 2 V2 Camshaft for LS1 & LS6 Engines
231/231 | .63x"/.59x" | LSA115+5

Designed for: LS1, LS6, LQ4 and LQ9 Engines (325-364ci) with Cathedral Port Heads (as they're equipped with stock)
Basic Operating RPM Range: 2000-6600
Expected Horsepower Gains: 45-55RWHP over the stock camshaft in a well-optimized setup (the higher the boost, the higher the gains!)
Stall Converter Required: Yes, 3600RPM+
Rear Gear Upgrade Required: No, unless your car has an automatic transmission with a 2.73 gear (we suggest 3.23+ for automatics)
Works Well with Nitrous: No, designed for turbocharged applications
Will Pass Most Smog Emissions: No


And stage1

Tick Performance Turbo Stage 1 V2 Camshaft for LS1 & LS6 Engines
227/227 | .62x"/.59x" | LSA114+5

Designed for: LS1, LS6, LQ4 and LQ9 Engines (325-364ci) with Cathedral Port Heads (as they're equipped with stock)
Basic Operating RPM Range: 1600-6400
Expected Horsepower Gains: 35-45RWHP over the stock camshaft in a well-optimized setup (the higher the boost, the higher the gains!)
Stall Converter Required: Yes, 3200-3600RPM
Rear Gear Upgrade Required: No, unless your car has an automatic transmission with a 2.73 gear (we suggest 3.23+ for automatics)
Works Well with Nitrous: No, designed for turbocharged applications
Will Pass Most Smog Emissions: No

 

[darnie1987]

Check this out... could help ya alittle.... if all else fails could just have one spec'd thats what i would do if i had to pull mine. I do think there will be alittle left on the table with that cam tho

http://www.carcraft.com/techarticles/ctrp_1106_turbo_camshaft_guide/viewall.html

 

[11MPG]

I appreciate all the info but like I said before I'm not looking to create an instrument of precision speed. Yeah I have money tighed up in it considering the only thing original in the drive train is the short block 5.3. I was simply asking if I leave the stick that's currently in it is anything bad gonna happen. Simply looking to have the pull of that 150 nitrous shot without having to refill bottles. Valve springs are comp 918s. And the heads are not ported.

 

[darnie1987]

i wouldnt think reliabulity would be a huge issue. running low boost " around 6-8 psi" i know on of my buddies is runnin a kit on a bone stock 2010 truck at 10psi and hasnt had any issues although hes pushing upper 400's he also has fuel an tuning of course. I think with hardened push rods, and the 918's should do fine for a low amount of boost. keep in mind ull prob be around 20hp per pound of boost give or take so 8psi or so should net ya around 160 over what you are NA food for thought. " in a perfect world"

only issue i would think would be a large amout of boost with the cam, due to how much lift you have on the exhaust side vs the intake side causing the over lap seems pretty high for boost? But As long as you arnt reving it to the moon and running a grip tone of boost i think it would be reliable from what i have gathered from ppl.

 

[DirtyBlackHD]

Lift does not effect overlap

 

[darnie1987]

Lift does not effect overlap

maybe i mis worded it. i just ment that from what ive heard and read that its not good on the valve terrain to have the exhaust open to much as well as it opening too soon or staying over too long. My bad if it came out wrong.

 

[darnie1987]

Pulled form that article, read it again what i was getting at...


Overlap is defined as the number of crankshaft degrees of rotation established between when the exhaust valve closes (EC) and the intake valve opens (IO). This is established by several factors. We discussed this idea with Comp Cams’ lobe designer Billy Godbold. Godbold says the popular belief is that the lobe-separation angle is responsible for the amount of overlap, but that is only partly true. The important other half of the equation is the length of both intake and exhaust lobe durations. If either intake or exhaust duration increases, it will affect overlap. The accompanying Comp Cams illustration makes this easier to understand. If we move the intake and exhaust centerlines closer together, the angle gets smaller—as from 114 degrees to 110 degrees. When this happens, that small triangle that indicates overlap increases in size.

With a given lobe-separation angle, overlap will increase with added duration. We’ve included a short explanation of how to calculate overlap from the opening and closing points given on the cam card. In our case, the specs for these three Comp cams are offered at 0.006-inch tappet lift. As you can see, increasing the duration from the smallest to the largest cam increases the overlap by an amazing 12 degrees, even though the lobe-separation angle remains at 110 degrees.

 

[ShredSled]

Valve springs are comp 918s.

EVACUATE PREMISES IMMEDIATELY!


Ditch those time bombs as soon as you can. I lost a 5.3 to them with a tiny cam (and they were the "newer design" blue stripes too).

 

[Atomic]

That cam will *work* (as will any cam), but obviously there are better choices out there. Keep in mind the turbine will blend the exhaust so it wont sound the same. High rpms will suffer due to the exhaust bias and high back pressure you will probably have.

 

[barrrf]

If you want to go fast, just drive your charger that runs 11s.

 

[Steve]

If you want to go fast, just drive your charger that runs 11s.

:bertstare:

 

[11MPG]

Yeah the Charger was supposed to be just a daily driver but things got outta hand. 3.91 Getrag Rear, 3,200 rpm stall, headers, muffler swap for Bullets, Nitrous Wet Shot. Managed a 11.98 at raceway park with slicks. Issue is it's too loud, trans get's hot in traffic, and engine buzzes 3k @ 75mph.

The weird thing is the only vehicle I left stock is a JK Jeep Wrangler.

Charger and Burb

JK in a good environment for it.

The fleet in the driveway

Then there's this...good luck figuring out what it was.

 

[Steve]

Planning to leave that girl stock or do you have a mod list planned?

 

[11MPG]

Planning to leave that girl stock or do you have a mod list planned?

does a wedding ring count?

 

[Steve]

does a wedding ring count?

No.

 

[ShredSled]

Wedding ring mod has been shown to cause unexplained backfire.