IBAUCLAPlaya

Concerned #'s seem low?

2009 Z06 28K miles.

Mods:
AHP-Package 4 Heads Street Ported with Stock Titanium Intake Valves Treated and Polished, GM Sodium Exhaust Valves, New Viton Valve Seals and machined valve locks, machined heads .030"
AHP-MoldStar90 Valve Guides
AHP-PSI 1511 ML Valve Springs with PSI Titanium 4gram Retainers
AHP 116 cam Kit 220/244 .615"/.648" 116LSA (Isky) with 3/8" Hardened Push Rods, Seats, Seals and Heavy Duty Timing Chain, Camshaft retainer plate/gasket w/ hardware, ARP cam bolts, Timing cover gasket set w/ water pump gaskets, ARP crankshaft bolt
AHP-ARP head bolts, GM MLS LS7 head gaskets, GM MLS LS7 exhaust manifold gaskets, NGK TR6gp platinum spark plugs, AC Delco Red performance spark plug wires, ARP block bolt hole thread chase
LG Motorsports-1-3/4" SuperPro Long Tube Headers
Killer Bee Intake
93 octane

Tune details:
I put down 523/465 SAE on 80º day. Cam doesn't seem to kick in until 3500RPM or so. I asked tuner to be conservative with focus on low end for road racing & he told me this was with 18º timing at peak TQ and 22º timing peak HP for reference. Tuner has great reviews across multiple websites

For driveability, the car seems to buck around town cruising 1000-1200 RPM and in my short 4mile 35MPH route to work, I'm only averaging 12MPG. In my research I thought the cam I chose was very mild and would experience these problems. On highway I'm closer to 22MPG

Another guy I know just went to a shop in Medina and dyno'd 580/526 with very similar mods (WCCH stage 2 heads + Vengence Kaotic cam) and despite more aggressive cam, his powerband seems generally far stronger.
He is also saying the tires just spin in 4th until 100mph whereas I don't have close to that problem despite running NT01's in back on factory wheels.

I'm curious to hear your thoughts on these performance numbers and if you think there is opportunity to improve. I don't want to find another tuner& spend the time/money to get the same results.

My graph:


His graph:


TIA

EviLS7

Dynojets have been known to be more favorable with giving higher HP numbers. Are you running the stock LS7 intake manifold?

UmCanesZ06

The fact that the car is bucking with a relatively mild cam, makes me think it's the tune. I had a Texas Speed MS3 cam in an old c5 z06 that I had and had no issues with bucking at low rpms and the ms3 is a pretty big cam. Its all in the tune. As far as your numbers, in comparison, my car, a 2008 z06, totally stock down to the air filter, made 471 hp (don't recall the tq number) with just a tune. With all of your mods, is think you'd be making more than 50hp more than me.

American Heritage

If the 116 buck the tune need work.
Our 116 does not buck or surge when properly tuned.

We typically see anywhere from 535rwhp to 550rwhp with our 116 cam and 91 octane.

Here is a dyno graph with Street ported heads, 116 cam, cai, ported stock intake and ported stock tb. All else stock (stock exhaust manifolds, etc...)
The dyno this graph is on reads 2-3% higher than the other dyno we use and other dyno's in the area so I would say a fair number for this graph would be 535/493



Another dyno graph from a C6z06 we finished this past week.... Put down 550rwhp on 91 and 580rwhp on 61% E85. Its not the best example as he is running 2" headers, larger injectors, E85 and our Package 4 with Race ports but he is running our 116 cam. I will say that even at 580rwhp there is still zero bucking or surging to our 116 cam.



If the 116 cam has any driveablity issues the tune needs more work.

Op feel free to shoot me a PM or email if you have any questions, etc...

https://www.americanheritageperformance.com/

IBAUCLAPlaya

Thanks for the feedback. Car is on stock intake mani and throttle body.
Dyno used was a dynojet.

Indepth

Check your PMs...

Unreal

Just reading the mods i would have guessed 525rwhp. The bucking can be fixed easy but wot tuning is so simple i doubt there is much left there.

ssbowtie1

Those SAE numbers look exactly on point for those mods.

IBAUCLAPlaya

Are WCCH Heads and Vengence Kaotic cam really worth 50 whp&tq over my setup?

ssbowtie1

Is he running a stock intake manifold, TB, and 1 3/4 headers and well?

lt1z

Doesn't seem off for a cam that size or those heads.

Unreal

Yes, easy.

JasonSB

To get rid of the bucking it really needs to be street tuned. Hard to tune out bucking on a dynojet because you are not putting as much load on the car

MTPZ06

This. 2" LT's (or 1-7/8" for that matter) and a ported MSD would conservatively yield another 40 rwhp.

But, yes...your tune sounds like it needs work.

Must_Have_Z

1000-1200 RPM bucking will happen if you're in the wrong gear. I can run my custom cam down to about 1200 RPM in 4th and then it will buck a bit and I downshift. If you're getting bucking in lower gears at those RPMs then you need the tune looked at for sure. If you're in 4th gear at those RPMs, bucking will happen (can't lug the car around with a bigger cam that you can with the stock cam).

My cam is a bit bigger than yours (230/246 .634/.634 116+4) and I made 556/480 with headers, MSD intake, K&N and AHP Stage 4 heads (ported and polished). So your numbers aren't THAT far off.

Unreal

He should not have bucking at any RPM in any gear with that small of a cam. A cam your size can, but even then should have almost none with a good tune. I run an almost identical cam to yours and can put it in 4th/5th/6th at 800-900rpm with no bucking or issues. Anything with <5 degrees of overlap should have no issues with bucking/surging.

Pb82 Ronin

True words.

Drew03tx

I use to have the AHP116 cam I can attest there was no bucking at all with that cam. From a stop I could just use the clutch to get the car moving without touching the gas and it still didn't buck

IBAUCLAPlaya

Thanks for the feedback. The other car I was referring to has factory IM & TB, no porting, but does have aftermarket headers, unsure make or size. I went with 1-3/4 because of LG's recommendation for low end torque.

Going to take my car back to the original tuner to have him look into driveability issues. Then also probably have a second tuner take a look at tune and get on dyno to get another opinion.

Starting to think I should've went with a different cam...

Unreal

If reliability, drive like stock, and long term guides are your concern, you have a great setup. If you wanted a ton of power, there are definitely better options, but those other areas will suffer.