Larry

iTrader: (4)

What in my tune file needs to be changed to get the tb to open sooner than 30 mph? 2017 Z06 Corvette.

G Atsma

I would think it is opening SOME to get to 30mph. Unless you mean go wide open...

Larry

iTrader: (4)

Yes WOT, it's open about 40% at 2 mph but takes until over 30 mph to get 100%. I would like to see it WOT about 15 mph so some tm is still working.

You would have to use HP Tuner to view my log and file.

Old Geezer

iTrader: (3)

No HP, but I'd look at torque mgmt...

Larry

iTrader: (4)

This is the only table I see that may be applicable under tm. But the factory numbers seem fairly high.

2xLS1

iTrader: (25)

DI calibrations are a whole new way of doing things. You should be asking this on HP Tuners Gen 5 forum where people are trying to figure them out.

https://www.hptuners.com/forum/forum...ine-Gas-(Gen-5)

Larry

iTrader: (4)

I did that back in February and nobody seems to know what to do to control this.

https://www.hptuners.com/forum/showt...on-2017-C7-Z06

2xLS1

iTrader: (25)

Bump it back to the top. Like I said people are still learning the Gen5 stuff. Maybe something has come to light since Feb. Especially on a 2017.

BTW, are you the Larry that sold the improved idler pulleys for the f-bodies many many years ago?

Larry

iTrader: (4)

There are posts as early as three weeks ago on that link and seems nobody still knows.

Yes, I'm that Larry! Sold a few more other than just idler pulleys too prior to 1998.

2xLS1

iTrader: (25)

Sorry I only looked at page 1. I'd still keep bumping it. There are a few people over there that seem to have figured out more than others on the Gen5 stuff.

I thought so on the pulley. I'm still running one on my 99. If I remember you only made about 50 of them.

T/A KID

iTrader: (12)

I must have missed that thread...
oil starvation needs disabled and you have to mod the DD and peak tq table correctly

the reason is takes so long to open TB 100% is due to not seeing enough tq

T/A KID

iTrader: (12)

Think of it as not "making" the ECU see enough power so it only OPENS the blade enough To make the desired output you are telling the ECU your trying to make

Larry

iTrader: (4)

Disabling the oil starvation is easy. Now to determine the values required to get the throttle open sooner.

This is A table. There is also a C I would assume needs tweaking.

T/A KID

iTrader: (12)

increase the DD in A-C (the smaller Throttle areas need more love)
also increase Peak tq too

I can get the desired and actual throttle to match and go straight up when making a 100% pull (no delay)

Larry

iTrader: (4)

Maybe something like this? A and Peak tq increased 10%.

T/A KID

iTrader: (12)

Thats a start but it will need more then 10% in the low cells..
peak tq in the lower RPMs will need more too..

notice the VSS is not in MPH (do the conversion in the scanner table)
the first column is very important in modding the 100% at 0mph or very low speeds...

T/A KID

iTrader: (12)

I'll give you another tip the really negative values helpnwith engine braking... I personally hate that... I would cut those values in half..

also from the factory the DD table can cause tq management sparkncut with regular driving... fixing the really NEG values can fix that at low TPS throttle response

Larry

iTrader: (4)

Thanks for all the help! I'll see what I can come up with.

T/A KID

iTrader: (12)

No problem!! I'm Ben Charles on Hp tuners

Larry

iTrader: (4)

Oh yea, Ben! Thanks again!