Stock cam specs for 87 TB

[TurboTdr3.8]

I have searched and can not find any specs on a stock TB cam shaft , I would like to see the specs like you get when you order a after market cam and get the sheet of all the cam setting numbers like degreeing it in . Anyone have that info or know where I an find it .

 

[bison]

Send me a stock cam with low mileage and I can analyze it. The numbers you see on the cards that come with the cams are formula generated. They aren't 100% accurate.

 

[turbo nasty]

Advertised Duration : 258/262
Duration at .050" lift : 192/196
Lift .384/.408
Lobe Separation 107 degrees
Overlap 38 degrees

The above info is from gnttype.org FWIW says its from a vendors catalog. Pretty sure its listed in the shop manual somewheres tho.

 

[bison]

Advertised Duration : 258/262
Duration at .050" lift : 192/196
Lift .384/.408
Lobe Separation 107 degrees
Overlap 38 degrees

The above info is from gnttype.org FWIW says its from a vendors catalog. Pretty sure its listed in the shop manual somewheres tho.

What was duration at .200"?

 

[Mike Licht]

I measured one years ago I can't find my notes right now. The Lobe Sep was 107 for sure but I remember the exhaust at 198@ .050 so pretty close to the above. Bison, I remember the .200 number being soft so the lobe was not very aggressive. I will look for it later
Mike

 

[TurboTdr3.8]

Sorry I do have a cam to send to you , what I am trying to do is see the specs on a stock cam and find out where the factory specs came up with a camshaft sensor to be set at 25 ATDC ,

 

[Mike Licht]

I am curious what you are trying to do here?
Mike

 

[TurboTdr3.8]

I am curious what you are trying to do here?

The reason is the stock cam sets the cam sensor at 25 ATDC to run right if no wear is in engine , what I have is Fullthrottle cam kit# 105220/224 and am wondering what this cam sensor sets at for perfect timing with this cam , if I knew what the stock cam specs maybe I could figure out where the aftermarket cam sets at instead of trail and error . I know the opening timing of the intake valve is very critical in coming up with this setting .

 

[Mike Licht]

The cam sensor does not control timing it only tells the ECU when the engine is on number one at start up. There is no performance to be gained by moving it.

 

[TurboTdr3.8]

The cam sensor does not control timing

I know it does nothin for ignition timing but it times the injector timing is what I am refering too . 25 ATDC means something in relation to the cam .

 

[Mike Licht]

I went through this years ago. Trust me there is nothing there. It just sets the ECU into motion. As far as injector timing goes just unplug the cam sensor after the engine is running and put it into batch fire where the injectors all fire at the same time. Go drive it, it runs fine.
Mike

 

[TurboTdr3.8]

Thanks for your comments and time as I have several parts and items from your store on my car now and they all work great .