Z06Vette.com - Corvette Z06 Forum

TT Z06 · 08-20-2006, 10:25 AM

I've been reading tuning literature on my quest to master HP Tuners on my ride. Finding some interesting stuff. I'm no expert, and glossing over topics I've read, I thought some of you might find this stuff interesting too.

Cars from the factory are of course, safe tuned. No two motors are identical, and neither are each of your 8 cylinders!

Not only can stock tune motors be tuned much better to the individual motor, but how bout tuning to the indiviudal cylinders! Individual cylinder calibration on a high output chevy v8 is good for 50 unclaimed horsepower.

Computer controlled individual cylinder adjustable electronic port fuel injection. (that's a long name!)

Each cylinder can vary enough that stock tuning safely around/at the worst cylinder leaves the others vastly unproductive.

Whatever the volumetric efficiency of each single-cylinder-engine, optimal timing and mixture can be provided.

EFI and computers make this an intellectual task. Is it real? Is it worth it? Would anyone ever do this? Check this out.

NASCAR engines are restricted to single point carburators. They actually cylinder tune the hard way by manipulating each cylinder's compression ratio, rocker arm, and cam lobe to achieve peak power from each cylinder!

tblu92 · 12-06-2006, 04:02 PM

Hi--Everyone has different opinions on this--personally i have never seen 50 HP from a tune--On a GM truck or SUV maybe in the 20-30 range--A corvette or camaro-GTO--those engines are so finely tuned already that i see common place abot 10-15 .In the old days of cast Iron-tuning each cylinder was needed as there were huge differances between holes beacuse of poor casts--in todays world of aluminum and polymers--the casts and molds are near perfect without a need for much individual cyl. adjustments---Gm reailzed as did the racing commuity years before the GEN 3 that changing the firing order would smooth out the pulses making more power and a smoother running engine--this was huge cloning individual cylinder performace--benig a retired racer --injured from a near fatal crash--i have plenty of time on my hands I have spent countless days trying to get more power out of these engines (without destrying them )with little success---
So I base my conclusions on that--As an EFILIVE master tuner i think at a certain point it is just time to change parts--and do tuning to keep the engine running crisp -trouble free and to make it live---

TT Z06 · 12-07-2006, 12:52 AM

Of course our stock pcm's can't do single cylinder tuning so what we could get out of such a custom tune on a production vette probably isn't commonly known.

I just found it interesting reading.

**panzer** · 12-07-2006, 04:04 AM

Quote:

Originally Posted by TT Z06

I've been reading tuning literature on my quest to master HP Tuners on my ride. Finding some interesting stuff. I'm no expert, and glossing over topics I've read, I thought some of you might find this stuff interesting too.

What tuning literature have you been reading? I have not found much on Amazon that cover anything except ricers. Can you recommend some reading? Thanks

TT Z06 · 12-07-2006, 08:29 AM

Quote:

Originally Posted by panzer

What tuning literature have you been reading? I have not found much on Amazon that cover anything except ricers. Can you recommend some reading? Thanks

I got started by purchasing HPTuners (dotcom) and learning the program. I also started attending EFI University. You get literature (and lecture) in the classes and they have some good book(s) on their site as well. efi101 (dotcom).

disclaimer: I don't work for either above company, just tryin to help a brother out.

Brandon619 · 12-07-2006, 05:20 PM

Hey TTZ06, let me know when your in San Diego again. I'm waiting to see your new monster.

TT Z06 · 12-07-2006, 06:27 PM

Quote:

Originally Posted by Brandon619

Hey TTZ06, let me know when your in San Diego again. I'm waiting to see your new monster.

I will. We should set something up. My buddy up here got STS on his 05 C6. Frkn rocks.

I'll be at streets of willow springs all day tomorrow (friday) if you can stop by. Nothin like the track. I think the C6 is coming too.

22655TD · 12-08-2006, 01:33 PM

Quote:

Originally Posted by TT Z06

Of course our stock pcm's can't do single cylinder tuning so what we could get out of such a custom tune on a production vette probably isn't commonly known.

I just found it interesting reading.

I always had the thought that you could ( if money not an issue)
You cant do single cylinder tunnng with the ECM but you can balance the cylinder for lean and rich by playing wit the injectors. I have wanted to figure out the #7 #5 cylinder lean issue and adjust the injector

**FRC Tom** · 12-10-2006, 01:18 PM

Hi guys,
Don't know a bunch but when i did tune a 2005 2500 hd Silverado about 6 months ago got 54 rwhp after the tune with 93 octane as the primary fuel.

I have not tuned many trucks.

tuned about 75- 100 C5 Z06s and have never gotten more than 15 rwhp from a stock car.................................

TT Z06 · 12-11-2006, 01:31 AM

Quote:

Originally Posted by FRC Tom

Hi guys,
Don't know a bunch but when i did tune a 2005 2500 hd Silverado about 6 months ago got 54 rwhp after the tune with 93 octane as the primary fuel.

I have not tuned many trucks.

tuned about 75- 100 C5 Z06s and have never gotten more than 15 rwhp from a stock car.................................

That's interesting. Do you think maybe the Z's are already dialed in closer to their best, than say a non performance truck?

**FRC Tom** · 12-13-2006, 09:49 AM

Quote:

Originally Posted by TT Z06

That's interesting. Do you think maybe the Z's are already dialed in closer to their best, than say a non performance truck?

For one the trucks are tuned for 87 octane.
The timing table above 80 g/cly at 5200 rpms is at 8 degrees, dropping to 5 at 6000 rpms vs. 20-22 degrees on a Z06.
12-14 degrees is alot of power.......

Z0Sick6 · 10-17-2007, 10:12 AM

some nice facts