Is my car cammed?

Vette TPI · 03-18-2012, 04:32 PM

I got a 1987 Corvette and it has been rated to idle at 400 rpms stock. But my car idles at 900 when warm. So it would lead me to assume it is cammed.

upflying · 03-18-2012, 06:13 PM

This is what a cammed Corvette sounds like.

Fightinfire921 · 03-18-2012, 06:31 PM

What's the idle in drive?

Vette TPI · 03-20-2012, 02:11 PM

Quote:

Originally Posted by Gramps69Z

What's the idle in drive?

I can go check and be back shorty

In drive idles around 700

4DoorRocket · 03-20-2012, 02:29 PM

If it's not new, I'm not surprised. Older vehicles are not going to always keep to that rpm.

G8GT4now · 03-20-2012, 03:33 PM

It would be odd to just have a cam only change, especially on the TPI engine. Those things don't breath well at higher rpms.

Any evidence of other changes?

ffrcobra_65 · 03-20-2012, 03:50 PM

more like you need a good tune up.

Vette TPI · 03-20-2012, 08:46 PM

Quote:

Originally Posted by G8GT4now

It would be odd to just have a cam only change, especially on the TPI engine. Those things don't breath well at higher rpms.

Any evidence of other changes?

None so far. I just read a lot of stories from HotRod etc. that get a TPI with a cam already in the car.

Quote:

Originally Posted by ffrcobra_65

more like you need a good tune up.

That's most likely it at 107k miles, probably will rebuild engine next year for my college/hs credits.

motorhead · 03-20-2012, 08:51 PM

Probably sucking air somewhere it shouldn't be or maybe the idle air bypass is dirty.

Vette TPI · 03-20-2012, 08:53 PM

Quote:

Originally Posted by motorhead

Probably sucking air somewhere it shouldn't be or maybe the idle air bypass is dirty.

Not sure where else it could be sucking air in. I know my exhaust has major leaks in the back but I'm not sure that would contribute to a higher idle. I'll have to check the idle air bypass and probably clean

03-18-2012, 04:32 PM	#1
Vette TPI Drives: 1987 Corvette TPI Join Date: Mar 2012 Location: Littleton Posts: 549	Is my car cammed? I got a 1987 Corvette and it has been rated to idle at 400 rpms stock. But my car idles at 900 when warm. So it would lead me to assume it is cammed. __________________

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03-18-2012, 06:31 PM	#3
Fightinfire921 Drives: GMC Acadia, Chevrolet Camaro Join Date: Jan 2009 Location: Winter Springs FL Posts: 1,657 View My Garage	What's the idle in drive?

03-20-2012, 02:29 PM	#5
4DoorRocket Drives: It's a 4 door rocket!!! Join Date: Aug 2011 Location: Depends on which month Posts: 100	If it's not new, I'm not surprised. Older vehicles are not going to always keep to that rpm.

03-20-2012, 03:33 PM	#6
G8GT4now Drives: 14 SS Sedan Join Date: Jul 2008 Location: Houston, TX Posts: 474	It would be odd to just have a cam only change, especially on the TPI engine. Those things don't breath well at higher rpms. Any evidence of other changes?

03-20-2012, 03:50 PM	#7
ffrcobra_65 Account Suspended Drives: SuperCharged 2SS/RS IOM MN6 Join Date: May 2009 Location: CA Posts: 5,094	more like you need a good tune up.

03-20-2012, 08:51 PM	#9
motorhead Drives: Love the one you're with Join Date: Sep 2009 Location: Downtown Charlie Brown Posts: 11,850	Probably sucking air somewhere it shouldn't be or maybe the idle air bypass is dirty.