Hey there, I have a question to see if anybody else has this problem. My 2010 Balt has 25k mi. gm1, drop in k&n. I have noticed whern in 5th at around 70-80mph if i floor it, the rpm's will climb 200 -300 then drop back down to normal and continue to climb as it should. It does not do it right when foot goes down but as the boost seems to kick in and only does it for a sec. but does not do it always and in no other gear or even when in the "real power rpm's" It pulls strong. The boost does not "spike" when this happens either. I am not a hard driver on the clutch.
I hope i explained it well enough.
Any help would be appreciated.
Thanks ahead of time

 

seems to me it would be clutch slip. 5th gear would put the biggest load on the clutch as it is overdrive instead of a reduction.

 

what ^^^^^ said. you should refrain from doing any heavy acceleration in 5th. always drop down a gear or 2 (depending on your speed).

 

I see the same issue. At 80 mph the tach is over 3k. Doesn't feel like the clutch is slipping, but I could be wrong. It feels to me like the system is building boost and once it does the RPM's drop and then drive hard and fast from there.

 

do you have an interceptor or dash daq?
If so watch your fuel trims and AFR when this happens./

Probably clutch slip though.

 

flooring it in 5th going 70-80 is heavy on the clutch... i wouldnt be doing that lol

 

rarely do it so may be why i have not noticed it before. Souds like Blackhawk has the same thing so i know im not crazy.lol I have had many cars with clutch slip but this feel starngly different.I am not sure what a daq is but i can watch the afr and the fuel trims. It seems hard to believe the clutch would be going at this early in its life. especially the way i drive it or is the stock clutch just not built to handle the strain in 5th? Remeber it does not do it every time I try.

 

+1 vote for clutch slip.

 

It may be but why does it not do it ALL the time? feels more like a computer problem. I did watch my AFR when it was doing it and nothing strange. between 14-15 durring regular driving and was closer to 14 when it was doing it but nothing odd.
thanks for the input. Are the stock clutches not built to handle this?

 

Its clutch slip. Mine would do the same thing and I wouldn't even have to go wot, if I just hit the wrong load it'd slip.

 

You read my mind lmao

 

Two possibilities here:

1) You've got mad power and can spin the tires at highway speeds in fifth gear just by mashing the go pedal.

2) Your clutch is slipping.

Let us ponder.... =)

 

Clutch slips the easiest to cause when you floor the car outside of the main powerband. AKA below 3500 RPMs. if you floored it at 1500 rpms in 4th it would probably do it too. You should pretty much never be floored in 5th unless you're already doing 100 mph

 

I like the mad power theory!!! LOL

 

Thank you guys!!!
I don't make a habit of doing this. It was just something that i did for some reason that made me notice it. Took a year to notice it did it.

 

clutch slip x37...do your car a favor and never floor it in low rpm while in high gear. Soooooo much stress vs downshifting a gear or two.

 

Clutch is slipping. Don't do that.

 

I'D SAY WE NIPPED THAT IN THE BUD. BEEN EXPERIENCING THIS FOR AWHILE. iT IS STARNGE, SOME DAYS IT WONT SLIP AT ALL. OTHERS , I HAVE TO GET DOWN TO 3RD GEAR TO PULL.

 

i noticed this after my car got stalled on the dyno for a few days, now its fine 10,000mi later. but its obviously your clutch man