aprox. HP

[75 C20]

i have a 1975 C20 with a 350, granny manual trans. i have headers, new edelebrock 600 cfm carb., alum. gm preformence intake, straight pipes and glasspacks. Any Body got an Idea of aprxamately how many horsepower i got??

[Lt.Del]

You didn't mention if your engine is stock for the vehicle...makes a difference.

If it is stock, It probably had about 180 horses.

SgtDel

[1974Super10]

Around 230-250 horse, depending on the year of your motor... It would depend if the Cylinder Heads were 64cc or 72cc

[75 C20]

yeah it came stock with the truck

[Lt.Del]

I am sure there wasn't over 200 hp in those years.  About 180 hp.

SgtDel

[Z28 c10]

Get the engine code off the pad behind your alternater on the block and cross referance the last three letters,suffix code, on this link--
www.nastyz28.com/spmenu.html
For instance, mine shows CNB as suffix code, so I click
CMK- CUD, follow the codes down to find CNB and, viola, I've got a 1970 Z28 350 with advertised 360 factory hp. Now you have to take into account that that's flywheel hp. The drivetrain takes up a bit of power, but, it gives you a really good idea at what your dealing with.

 JayTater

 Z28 C10

[75 C20]

i'll do that, thanks

[roundedline]

Keep in mind the Suffix code only is valid IF the internals that were in it when it left the factory are still there.  Just becuase it has X suffix on it doesn't mean you have a 360hp block, it just means you have a small block chevy.  The code along with the VIN ties it to a specific car/engine.

The 1975 C20's had 160 hp stock.  You may have gained 15hp.  But the engine is 31 years old and it probably doesn't have 175hp anymore...

Chris Lucas
www.73-87chevytrucks.com
www.captkaoscustoms.com
Project Su
Jimmy 2WD Project

Edited by: roundedline at: 4/26/06 4:38 pm

[DnStClr]

Roundedline, the 160 hp- is that off the engine or the rear wheels?

[roundedline]

At the crankshaft.

Chris Lucas
www.73-87chevytrucks.com
www.captkaoscustoms.com
Project Su
Jimmy 2WD Project