brownrd

2000 C5 M6

Just completed a H/C/I install and it is now time for a tune. I have done a street tune in the past when the LT's and CAI where installed but a new dyno shop has opened in town. Quoted price is the same.

The street tuner is well known in the area, the dyno shop has only been open for 9 months so I have no idea about their level of competence. They are the only dyno available within a reasonable drive.

Car will be mostly street driven but with very occasional HPDE at the local track.

Cam is 228 232 .611 .600 111+3. Heads are unported LS6 243 castings.

What would you do?

HCI2000SS

iTrader: (2)

Really you need both for the best results, but if I had to choose, id get a good street tune over all else

truckdoug

iTrader: (25)

street tune + log track passes

85LSXTRUCK

iTrader: (2)

I would think a dyno tune would include some street tuning as well to make fine adjustments after the dyno. Thats how my tuner done mine anyways.

brownrd

Thanks guys!

This is exactly the type of experienced based input I was hoping for.

LLLosingit

iTrader: (4)

Both have their advantages and disadvantages but dyno for a good base tune and street to fine tune.
The main differences are that a dyno allows a more controlled environment and safer full throttle pulls. If it's strapped down tight it can also allow 2-3-4 gear full throttle pulls where on the street it may spin the tires or you just can't find a place to run 100+ mph. A street tune allows you to tune in regular stop and go traffic and where effects of braking/upshifting/downshifting can be fine tuned.

HCI2000SS

iTrader: (2)

I found it interesting that my car would knock a little on the street at 28 degrees timing, but not on the dyno. It makes sense though when you break it down.

Darth_V8r

iTrader: (4)

The dyno also gives the opportunity to measure effectiveness of changes. Case in point, a motor made peak power at 24, but didn't knock even at 26. Many street tunes would have it at 26, because it didn't knock, but 24 was better

JakeFusion

iTrader: (7)

Track tune...

It's a safer place to do it. Can run back to back to see what nets most power. And you can dial it in with a load.

LSX Power Tuning

iTrader: (4)

We have a load bearing dyno...its the only way to get good data for tuning. We can vary the load almost indefinitely to simulate almost every driving condition and hit cells in the tune that are sometimes hard to hit on the street repeatedly or safely. We dyno tune every car before we take them to the track and make a full pass right off the trailer, including our mile cars and the ones that run at Bonneville. Most street cars or a new race car may not be consistent right away so your adding more variables when trying to to tune at the track. When we go to the track we usually have to make very little changes from off the dyno. On our mile Z06's from the dyno to at the actually mile we changed the timing 1 deg reading the plugs at the mile for example. On street cars we check drivabilty and shift points on the street but usually and only have to make very small changes.

Darth_V8r

iTrader: (4)

That's cool you guys actually pull a plug to look at it. Great data point that I don't often see people using anymore.

big hammer

Loaded dyno. You can feel 10 hp on the street

AnotherWs6

iTrader: (17)

Either you meant to say can't or you have a very sensitive *** dyno.