[KingLT1]

Originally Posted by DorkMissile

Yea I did a "TB Clean" reset in HPT and it seems much better without RevMatch but its still there with the RM on

What I am seeing is that the timing is vey low, 0 -7 degrees when the car is rolling, clutch in, no throttle

Is your minimum spark table stock?

[DorkMissile]

Originally Posted by Anom1LE

Any updates?

Well after doing a throttle clean / relearn, my situation is improved. With RevMatch off I only seem to get the timing stall in 1st gear from a dead stop, which might not be such a bad thing.

However - what is interesting is with RevMatch on, and data logging, I can shift gears, let the clutch out and get the stutter. When this is happening - the "Immediate Engine Torque" and Predicted Torque Commanded" values come in on the log as "UNKNOWN"

It is like the tune is referencing a table not being addressed in the tune. My tuner is stumped and haven't seen much help on the HPT Forums either

[KingLT1]

It's a tune issue.

[wintee4478]

Originally Posted by NYblack1le

Installed a soler 95mm throttle body and had the car retuned. Car now is -5degrees of timing at idle and pulls timing at partial throttle every so often. Anybody else have this problem? Mods are 1 7/8 headers. Msd intake. Rotofab. Flex fuel.

i am doing same mods soon just got a soler 95 mm ported and an msd I am going to have ported soon

current mods are flex fuel , 1-7/8th arh long tubes , roto fab , mighty mouse and tuned

who did ur tune? i want to make sure my idle is addressed proper

[biker2k]

i have same issue with stock 95 mm t/b

i have been told there is a table that hp tuners cant access 1le specific and with rev match on its a disaster...

i would love to see a fix on this...

[ssmike]

Does anyone know what the max throttle area should be on the ported 87?

[biker2k]

has any one contacted hp tuners directly and asked them about this?

[NYblack1le]

I’ve been through 3 tuners. JTM motorsports, Brett at pray performance and the boys over at GPI. I swapped over to a 103mm and have the same issues. I spoke to Ryan at GPI in person when I picked up my car after my build was complete and he told me that there are tables that cannot be reached and there’s not much you can do about it. If I use rev match, I turn it on, downshift, then turn it off.

[biker2k]

well im sure someone higher up than me has tried this
but im reaching out to hp tuners direct
i will try to get someone on the phone that has knowledge of this...
seems to me like they should have a way of dealing with this

email has ben sent

[6spdhyperblue]

There’s the user defined parameter functionality if you want to find it yourself. I heard the table you’re looking for is in the bcm tho, not sure how true that is

[biker2k]

just don't understand how reputable tuners don't have a real answer on this...
it really ruins the driving experience after you spend all this time trying to get car right, and then the answer is, its just not possible..

[KingLT1]

Again, One thing you might try is setting the minimum spark to 5 degrees in all of the negative cells and blend it from there. That way if something in the ECU is trying to pull timing, 5 degrees is as low as it will pull. I did this in my tune to mitigate some of the excessive timing pull on shifts for the trans torque management. It also seems to make the car more responsive on tip in from a stop.

[NYblack1le]

Originally Posted by KingLT1

Again, One thing you might try is setting the minimum spark to 5 degrees in all of the negative cells and blend it from there. That way if something in the ECU is trying to pull timing, 5 degrees is as low as it will pull. I did this in my tune to mitigate some of the excessive timing pull on shifts for the trans torque management. It also seems to make the car more responsive on tip in from a stop.

This is what Ryan at gpi explained to me. You can’t fix it but you can blend it so there’s less intrusion and you don’t feel it as much. I was happy to atleast get an explanation from Ryan that theres not much that can be done instead of tuners being confused by the situation and not giving you a definitive answer.

[biker2k]

that sounds like a possible workaround but still should be a real way to deal with this..

ill keep that idea in the back of the head though thanx