Dynamometer Results & Comparisons - G5X3 112 Cam Only Dyno Results: 434 rwhp and 405 ft-lbs




torchedZ
10-23-2004, 03:43 PM
I installed the G5X3-112 LSA cam into my stock headed 2002 Z06 last weekend. First of all I want to thank TwoktwoZ06, Slythetove, jmX, Quicksilver2002 and other friends for lending a hand and/or for letting me borrow their tools.

Impressions...

This car was a bitch to drive before the tune and it acted like it had a large cam (dying in traffic, surging at stoplights, etc.). After dyno tuning the car is VERY driveable (as some of you know, my dyno tune was on 7 cylinders!). It hasn't surged, bucked, or died on me since the tune and getting the #8 cylinder working again. I can hot start the car with the AC on and the RPMs will drop a little, but it jumps right back to 900 rpms and lopes hard (very nice sound). The cars shakes at idle (I like that) but at cruising speed you'd never know there's a cam in there.

Results...

The car pulls so much harder than it did before the cam and I'm thoroughly impressed right now. I dyno'd the car this morning at a local shop and it made 434 rwhp and 405 ft-lbs tq (SAE Corrected) THROUGH CATS and full exhaust. The heads have never been off the car. It looks like there's even more left by leaning it out some.

https://webspace.utexas.edu/hugheyjr/Corvette/TorchedZ-Dyno.jpg

My modifications include: G5X3-112 Cam (Patriot Springs, Hardened Pushrods, Double Roller Timing Set), LG Headers WITH Random Tech 3" Cats, GHL Magnum Exhaust, Halltech Stinger Intake, Shaner S2 Throttle Body, ASP Underdrive Pulley, 160 T-stat.

Stay tuned for videos


44mag
10-23-2004, 03:45 PM
nice numbers!!!!!!!!! especially through cats and exhaust. did you have to flycut the pistons to fit?

The Juggernaut
10-23-2004, 04:14 PM
I did 399/436 through an unlocked Th400 4.10/slicks.

G5X-3 on a 114


pdd
10-23-2004, 05:15 PM
very nice :)

torchedZ
10-23-2004, 07:27 PM
Can a moderator move this thread to the dyno results section??

2MuchRiceMakesMeSick
10-23-2004, 07:35 PM
nice numbers :cheers:

Who tuned it? and whats going on with your A/F ratio at lower rpms?

WS6snake-eater
10-23-2004, 08:15 PM
It's called a lean spike. Pretty common actually. Justin you might want to go ahead and upgrade the fuel pump. It will keep the pressure up in the rails so that the lean spike will not occur.

torchedZ
10-23-2004, 08:23 PM
It's called a lean spike. Pretty common actually. Justin you might want to go ahead and upgrade the fuel pump. It will keep the pressure up in the rails so that the lean spike will not occur.

Probably not a bad idea Matt. Thanks for the suggestion. Chris Robinson in Lewisville tuned the car and did an awesome job. I just need to get it back to him now that I'm firing on all 8 cylinders.

BLASTER
10-23-2004, 09:46 PM
Very Nice...I noticed you have nice TQ down low and you're making power at around 6400-6500. Don't have to spin to 6800. What kind of spring change interval are you looking at with that came? Also, do you drive your car daily/couple time a week? Would you be able to sit in traffic? I want a cam but am guaging my tradeoffs. Thanks

wallstAL
10-23-2004, 10:52 PM
:lurk:

torchedZ
10-24-2004, 12:07 AM
Very Nice...I noticed you have nice TQ down low and you're making power at around 6400-6500. Don't have to spin to 6800. What kind of spring change interval are you looking at with that came? Also, do you drive your car daily/couple time a week? Would you be able to sit in traffic? I want a cam but am guaging my tradeoffs. Thanks

This car is my daily driver and only form of transportation. I can sit in traffic if I needed to and the car would run just fine. I'm a little shocked at how well it drives below 2k rpm. I'm planning on testing the springs at about 12-15k miles to see how they're doing.

jmX
10-24-2004, 12:24 AM
I'll move it to the dyno section for ya ;)

Good results! BTW, at that very same dyno I saw an MTI heads/cam car (milder cam) do 424rwhp, so its generally a dyno that doesnt overstate numbers.

ClarksZ06
10-24-2004, 12:51 AM
Great numbers for cam only! Stock intake?

Louis
10-24-2004, 10:44 AM
I guess that one cylinder was dragging the rest of them down a little bit hunh? :D

I like the 350#s Tq @ 2500 ;) Mucho daily driver fun.

Glad you like it. They are definately stout to say the least :D

Hardtop
10-24-2004, 11:57 AM
Awsome. I don't make that much with H/C. That's a great cam. :judge: :hail:

Bruce

torchedZ
10-24-2004, 01:38 PM
Great numbers for cam only! Stock intake?

Yes, I have the stock LS6 intake manifold.

Josh
10-24-2004, 02:15 PM
Those are awesome numbers, especially through cats! I picked up over 20 RWHP switching from a CarSound-catted Y/Loudmouth to a 3" X-Pipe.

Josh

deviate42
10-24-2004, 07:28 PM
did you have to flycut the pistons to fit?

im curious about this too

great numbers :usa:

BLASTER
10-24-2004, 08:56 PM
This car is my daily driver and only form of transportation. I can sit in traffic if I needed to and the car would run just fine. I'm a little shocked at how well it drives below 2k rpm. I'm planning on testing the springs at about 12-15k miles to see how they're doing.

Great news. Wow, now I don't know what to do. Why am I considering a smaller cam if I can get that drivability with something like this, LOL. Did you have to fly cut the pistons? Got any videos?

Louis
10-24-2004, 11:07 PM
No flycut on stock heads. Piston to Valve clearance is about 15 thou less than the X3 on a 114. On a 114, the clearance is very comfortable. On a 112, we reccommend that you check your clearances.

44mag
10-27-2004, 04:35 PM
what kind of power difference would it be on a 114 sep.? im guessing the power wont come so quick in the rpm band.

Louis
10-31-2004, 08:10 PM
44 mag, it moves the power curve up1-200 rpms.

I would like to make a couple of comments on here. On a 114, we are very comfortable with the valve to piston clearance. on a 112 it is closer, but we have many customers with this cam out there coupled with the Comp 921 springs on stock heads, and no one has had any problems.

It is a good idea if you get this cam on a 112 to verify your valve drop and Piston to valve clearance although there seems to be plenty of room.

We do recommend Comp 921 springs with this cam, Although other springs might work, We do not have enough experience with them to recommend them.

torchedZ
10-31-2004, 09:56 PM
44 mag, it moves the power curve up1-200 rpms.

I would like to make a couple of comments on here. On a 114, we are very comfortable with the valve to piston clearance. on a 112 it is closer, but we have many customers with this cam out there coupled with the Comp 921 springs on stock heads, and no one has had any problems.

It is a good idea if you get this cam on a 112 to verify your valve drop and Piston to valve clearance although there seems to be plenty of room.

We do recommend Comp 921 springs with this cam, Although other springs might work, We do not have enough experience with them to recommend them.

I wouldn't say there's plenty of room. My valve drop was 0.210" on the intake valve, so that's about 0.075" of P/V clearance at TDC (as a rule of thumb you shouldn't go under 0.100"). But the clearance gets even tighter than that at points between 15* BTDC and 15* ATDC. Before checking the valve drop I told myself I'd get a smaller cam if my valve drop was any lower than 0.210"......I barely made it. As a side note....I'll be flycutting when I put new heads on the car.

torchedZ
10-31-2004, 10:05 PM
44 mag,

Here's a dyno sheet of a Z06 with the same mods (no cats though) as me with the G5X3 114:

https://webspace.utexas.edu/hugheyjr/Corvette/g5x3%20114%20lg%20ls6%20ud.gif

And here's my G5X3 112 for comparison:

https://webspace.utexas.edu/hugheyjr/Corvette/TorchedZ-Dyno.jpg

I think the torque peak gives you a good idea of the powerband differences.