Ok, I know the specs for the 84- HO cam, and the lift of the 83 non-HO cam, but not the rest of the specs. Anyone know?

I figure I could probably stick on a set of 1.7s and get the lift, rather than have to pull apart the thing and stick an HO cam (Or Comp Cam, Crane, etc).

A. Non-HO Specs?
B. Can the Springs take the 1.7s lift?
C. How much can I add without having Banana Valves on the stock 83 pistons?

Thanks, guys!

 

The non-HO cam is no more than 0.416" lift at the valve with 1.6 rockers, 1.7 rockers would give you 0.442" lift... no bad for the amount of work involved. The springs can take that much no problem, and I don't see any issues with valve clearance considering the short duration that stock cam has.. it's no more than 260 deg advertised, probably closer to 250 degrees.

 

question... what is the benifets of swapping the rockers from 1.6 to 1.7?? i'm new at building engines and have an '83 351w project as well...

 

more lift, kinda like putting in a bigger cam.

 

worth the little effort of the swap??

 

With the restrictive heads on the 351, the more lift you can give it the better it will breath.. definitely worth it. The difference in power between the HO and non-HO 351 is impressive, and 1.7 rockers on a non-HO cam pretty much matches the HO cam specs.

 

that has me hooked. where could i find the rockers?? is it a fairly easy swap?? i'll be changing the valvecovers and gaskets anyway so it will all be exposed...

next question... any adverse effects to driveability??

thanks so much guys, for your help!!!

 

summitracing.com has them, or just about any speed shop. http://store.summitracing.com/egnsea...115+4294925044

 

thanks for that. they're sort of pricey eh??

 

can be, but your also looking at roller rockers.

have you tried filtering down some more? I purposely left it vague for that reason.

 

hmmm... i may have to look further. cheapest i seen was 159 for the set... i see NPD has them for 11.50 each but don't specify what size. i'll keep looking.

 

you figure 11.50 * 16 = 176 + tax & s&h. I dont see how thats cheeper.

 

lol...i am a dunce... i was thinking i only needed 8 . too much sawdust on the brain. thanks for that.

 

no worries, what we here for. lol

 

i guess it makes sence, 2v per cylinder, 16 rockers... 159 isn't such a bad price. i'll still keep looking though, there might be a better deal yet. say, will the idle "lope" as if there was a cam in there??