Nice rear-end!

 

115 HP? My 70 Camaro had over 300Hp. My mid 70's ran around 145 each my 80 had a motor I built and had 350Hp at the rear tires... my next one should have around 350-400 HP. 115 HP pushing around 1600kilo is not huge, but still should move OK.. have you thought about putting an aftermarket camshaft in your motor for a bit more power??

 

Thanks! I like big rearends!

 

You're right, 115 hp is not much! But in 1973 all Camaros did not come with lots of hp, according to the repair manual I have. The 350 engines came with 145, 175, 245, 250 hp. Even the 454 engine had not more than 275 hp!
The interesting number on the 307 engine ist the max torque: At 2000 rpm! That's why it feels quite "strong"....

I am hesitating a bit to change too much on the engine...I like somehow the untouched 100% stock condition. I start with the manifold and carburetor. For more power probably an increase of compression would be helpful. Stock is as low as 8.5. But that means new heads..? Would a different camshaft alone help??

 

Don't forget if you're comparing the h.p. to earlier than 1972 specs, that in 72 the ratings changed from "gross" (free engine power) to "net" (accessory loaded down power).
You can see a big dip in h.p. from one year to the next, when in reality the engine itself could be unchanged.

 

How many Miles Or Km are on that motor? The cam could be tired... but then the motor can be to worn to do much with.... you have to look at all information to make a good informed guess!

the 307 is a 283 with a 327 crank in it... Mostly... It should be good for anything you build it for... the limiting factors on any motor is... let it breath.. intake and Exhaust... Compression.. Cam and Heads.. Those heads are not the best for making high Horse power... but are great at low end torque. the cam is matched to that system... it is a basic RV cam.. A newer RV cam with a better set of lifters might get you a bit of gain in power... The intake and Carb will help it pull in more O2... the smaller primaries also help with low end torque, as long as you keep your foot out of the Secondaries you might get better fuel mileage... You should have better lowend throttle response too... Let us know how things go...

 

Ohh I hope your wife doesn't walk by and take that out of context.

 

Is that true or do you have it backwards? if it were I would have snagged a 307 years ago to stab the crank in a 350 block for so high revin 302 fun.

 

Yes, it's correct. The 350 has a 3.48" stroke, but the 307 and 327 have a 3.25" stroke. The 283 and 307 share a 3.875" bore. 302, 327 and 350 share a 4.0" bore, and the 283 and 302 share the same 3" stroke.

 

A 302 came from dropping the 283 crank into the 327. What you have to watch out for is large and small diameter crankshafts. The super short stroke with a nasty cam is what made that motor Rev so high.. but it would not Idel well below 1500 RPM.