Re: 350 - 270 Combo Horsepower
 

K/SA is a great class! Had a 1.45 last time out so we are inching closer to the 6.99 goal :)

Re: 350 - 270 Combo Horsepower
 

Please don't rub salt into the wound. LOL

Re: 350 - 270 Combo Horsepower
 

400 hp is no problem 425/435 for a killer!!

Re: 350 - 270 Combo Horsepower
 

400 hp is only 1.15 hp/in3 for a 350, so it should easily make 400 hp.

A good one should make north of 450 hp.

Re: 350 - 270 Combo Horsepower
 

Jim Hughes runs that engine with a stick, and runs pretty good, I think the 402 is a bit harder than the 350 . If you get the right engine builder it should be a fair engine and yes I have worked on a couple. They make about 480 or so.

Re: 350 - 270 Combo Horsepower
 

"They make about 480 or so"

Thats pretty accurate, with a peak of 6400 RPM.
488 HP
497 TQ

Re: 350 - 270 Combo Horsepower
 

Jim Hughes runs a 70 Nova with a 350 hp 402. Different animal than the '71

Re: 350 - 270 Combo Horsepower
 

Yes the 1970 402 is a way better motor. It also has an intake manifold that has a higher rise which produces better air/fuel flow than the 71 manifold. The 71 intake is flat as a pancake. The 70 engine is also 10.25-1 compression ratio. The 71 engine has a 9:28-1 CR.

Re: 350 - 270 Combo Horsepower
 

According to the tech. specs the 70/350 and 71/300 402 both run the same intake (flat #287).In order to get the 300/402 to be competitive you need a custom grind camshaft,if you have one of the "off the shelf" cams your leaving 2 tenths on the table,There basically a 325/396 cam with more ex. lift,but don't compliment the semi-open head (105cc) on the 300/402 which produces low torque #'s.With the right combo,cam/converter/gear,carb,light trans,good ring seal,right tune-up ( jetting,timing etc.) it should run with the majority of the cars in K. JMO gsa612

Re: 350 - 270 Combo Horsepower
 

Here's a picture of a 287 manifold. Doesn't look flat to me. The differences between the '70 and '71 engines are the heads (290 heads flow well and have a good combustion chamber design, 820 heads flow okay but the combustion chamber is sucky; not sure about the other '71 heads), camshaft, and 1.7 points of blueprinted compression (11.3 for the '70 and 9.6 for the '71). See www.classracerinfo.com for the actual calculated compression ratios.
http://i39.photobucket.com/albums/e2...psp5afhpdu.jpg