I'm questioning why I scheduled (Sept.) hub dyno testing for our ProCharged Camaro. This combo has 300+ runs of testing & tuning, most of it done while racing.

Other than getting the HP/Torque peaks & a baseline of what power I have now, what am I going to gain? The engine has been data logged during our runs & have plenty of tuning data. I don't really need any more power for our bracket program. The tuner/dyno guy wants more power of course out of the testing!

What do you guys think, should I give in & go for more power? I'm only spinning the blower around 66,000 rpm & I have a slightly smaller pulley to spin it to around 68,000 rpm. Well below the max. of 74,000 rpm of the blower.

2BKING

Unless you want to make your tune up maybe a bit more efficient and possibly make a little more power, you have already answered your own question.
Its your money

Sounds like a waste of time, money, and duty cycles.
But, dyno guy needs to make the register ring....

There is a mystic about a dyno. It would quantify what you have already qualified. If that's of interest then go for it!

I had 5 years of data on mine when I went this year and still feel it was a good trip… it wasn’t about gaining more power for me tho

You can learn more in one day on a dyno than you can in 6 months at the track even with good data logger. So for most people I say dyno but since you have 300+ runs with good data I do not know how much it is worth to you. Diminishing returns on the investment.

quote:

Originally posted by seabass:
I had 5 years of data on mine when I went this year and still feel it was a good trip… it wasn’t about gaining more power for me tho

Big Steve started with a good point, efficiency. I think I have some room here to improve. If I happen to pick up power, so be it but that's not what I'm after.

I'm sure I'm going to learn some more about my set-up. We are going to test blending in more ethanol into our base fuel 100 UL. It will require some more fuel/change in tune. This is primarily to lower the MATs.


2BKING is not rich, nor poor but I live very well; it's only cash!

quote:

Originally posted by B KING:

quote:

Originally posted by seabass:
I had 5 years of data on mine when I went this year and still feel it was a good trip… it wasn’t about gaining more power for me tho

Big Steve started with a good point, efficiency. I think I have some room here to improve. If I happen to pick up power, so be it but that's not what I'm after.

I'm sure I'm going to learn some more about my set-up. We are going to test blending in more ethanol into our base fuel 100 UL. It will require some more fuel/change in tune. This is primarily to lower the MATs.


2BKING is not rich, nor poor but I live very well; it's only cash!

That’s what i was after was to clean it up, ended up with safer spark plugs and 32 more hp…

quote:

Originally posted by B KING:
We are going to test blending in more ethanol into our base fuel 100 UL. It will require some more fuel/change in tune. This is primarily to lower the MATs.

Sunoco 260 GT, street legal 100 octane UL is our base fuel. We have a pretty good tune with this fuel & will baseline with it.

Our plan is to do another tune using 45% ethanol in our base fuel that already has 10%. The mix should be 2 gal. of E98 to 3 gal. of 260 GT. I do have a tester to verify the mix. Wallace Racing had a nice calculator to figure this out.

We'll see what we learn from this deal.

2BKING

The dyno data may be what is needed to better dial in converter stall, final drive gear, and tire height. Don’t give up chasing a better combo just yet..

quote:

Originally posted by B KING:

quote:

Originally posted by B KING:
We are going to test blending in more ethanol into our base fuel 100 UL. It will require some more fuel/change in tune. This is primarily to lower the MATs.

Sunoco 260 GT, street legal 100 octane UL is our base fuel. We have a pretty good tune with this fuel & will baseline with it.

Our plan is to do another tune using 45% ethanol in our base fuel that already has 10%. The mix should be 2 gal. of E98 to 3 gal. of 260 GT. I do have a tester to verify the mix. Wallace Racing had a nice calculator to figure this out.

Went to the track yesterday to buy X98 ethanol that they said was in stock but wasn't when I arrived. Plan B, I bought MS109. While this is not going to lower MAT, it will allow me to add more timing & hopefully more power.

Our goals have changed with our racing & this dyno session. We are hoping to add some more index racing in our schedule. We ran 6.0 last weekend & had plenty of power. We have a 5.80 index in Nov. & while I have power to run under, I would like to be under by more.

Hopefully we can find 50-100 hp without adding more boost. Plus, I don't have a smaller pulley at this time to do that.

2BKING

I'm disappointed with the hub dyno session. I learned little to no information about my torque & hp of my engine. The 1st day (Mon.) nothing happened because they had no hub adapter for my 5/8" studs. They machined some parts in the afternoon to have it ready for the next day (Tues.). It's a 3.5 hr. drive for me & I went home Mon. I told them I would return on Tues. around noon & to start with the dyno testing if they had it ready before I got there.

Tues. I'm heading back & about an hour into my trip I get a phone call from the shop asking me about the rear gearing. I told them 3.55 & they said that can't be right. For some reason they didn't want to spin the motor to 7,000 rpm. I checked the data log from the run & that's what it hit on the 1st pull. That's the rpm I hit at the stripe. They told me it can't be right, LOL! They stated they was going to change the gearing in the dyno program. I asked them what it made on the pull & they stated 777 WHP. They made the gearing program change & some minor clean up in the tune. The 2nd & last pull on my bracket tune on 100 UL made 808 WHP at 6500 rpm.

They drained my base fuel & added the VP MS 109. They did a check out pull with the new tune/better fuel & then started adding timing. This is when the dyno program didn't like what was going on. It was flashing a too much torque warning sign/reduce torque & shutting down the program. I still haven't arrived yet.

I get there & the good thing is they were checking/replacing all the plugs. They looked pretty good & they added another degree of timing. It was time for me to see the 1st, but last pull. All I got to see was the too much/reduce torque flash up on the screen & the run was ended. We checked the plugs & they could use 1* to 2* more timing.

That's where it ended in total disappointment to put it mildly. I have no dyno graphs, nothing but the 1st two numbers that I wasn't there to witness.

2BKING

That would be disappointing indeed

They probably should have told you before you contracted with them that their dyno could only handle the torque of a street engine.

I looked up the manufacturer of the dyno, I suspect it's probably the DAQ3 model. There are driveline/supercharger losses & I don't know if that comes into play on the program.

https://dynapack.com/model-range/

2BKING