hi pinion
3/4 ton status
wich one??????? /forums/images/graemlins/thumb.gif
CK5
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lets talk motors and horsepower
- Thread starter hi pinion
- Start date
84_Chevy_K10
Banned
Definitely going to need specs on the entire motor to even think about suggesting a camshaft.
Looks like I just found the new background picture for my desktop! /forums/images/graemlins/woot.gif /forums/images/graemlins/woot.gif /forums/images/graemlins/woot.gif /forums/images/graemlins/usaflag.gif /forums/images/graemlins/usaflag.gif /forums/images/graemlins/usaflag.gif
hi pinion
3/4 ton status
vortec heads.....on a 350 block /forums/images/graemlins/thumb.gif
84_Chevy_K10
Banned
need also:
Compression ratio
transmission choice
bore & stroke (stroker intentions? more cubes need more cam)
RPM range desired
gear ratio
tire size
total vehicle weight
intake manifold choice
carb/efi choice
if EFI, MAP or MAF
etc.
You certainly need far more info than, "Vortec heads on a 350 block"
Compression ratio
transmission choice
bore & stroke (stroker intentions? more cubes need more cam)
RPM range desired
gear ratio
tire size
total vehicle weight
intake manifold choice
carb/efi choice
if EFI, MAP or MAF
etc.
You certainly need far more info than, "Vortec heads on a 350 block"
hi pinion
3/4 ton status
stock,the 350 goodwrench comes with 8.5 -1 ,700r trans,but i think the vortects might up that 8.5-1......rpm range = im after low end torque,513s like in my sig,38s,weight=unknown,intake is a edelbrock performer,re built carb /forums/images/graemlins/thumb.gif
84_Chevy_K10
Banned
If all you're after is low end torque and you're using a stock bottom end, I'd leave whatever cam is already in the engine.
A high performance cam to increase horsepower is going to need compression, and 8.5:1 isn't enough.
I personally wouldn't run Vortecs with less than 9.5+:1 as it is a lot of expense to give up power by not having the rest of the system matched.
A high performance cam to increase horsepower is going to need compression, and 8.5:1 isn't enough.
I personally wouldn't run Vortecs with less than 9.5+:1 as it is a lot of expense to give up power by not having the rest of the system matched.
hi pinion
3/4 ton status
wow........what a waste,im regreting letting go of my old 350 now /forums/images/graemlins/dunno.gif
Stock Vortecs don't like lift over .450"
Crane told me my cam (it's been so long I have to go find the box to get specs on it, duration of something like 204/214) requires a better spring than the Vortecs come with stock as well...something like 90lb springs stock, need much more than that with a bigger roller cam. The new beehive springs might well solve the problem with Vortecs and the bad stock springs, but still added expense.
Edelbrock Etecs might be a good bet, I had looked into them previously, but not too in depth. The Fast Burns might be another choice, but I'm betting those heads are better suited to high RPM power, not low end torque like the Vortecs.
Dont' forget Vortecs stock require rail rockers, no re-using non-rail stuff.
Mine needed pushrod clearancing I guess because of the cam. Stock Vortec was like .420" max lift.
Flat tops and Vortecs got me around 9.2:1. Should be no problem on 87 since the Vortec chambers are so much better than older heads, but I haven't been able to test them under load yet. Soon.
Pro-toplines are probably a better choice than the Vortecs. Better components off the shelf, same price or less, and seem to be a prety good quality head both in flow and casting. (thicker too)
Crane told me my cam (it's been so long I have to go find the box to get specs on it, duration of something like 204/214) requires a better spring than the Vortecs come with stock as well...something like 90lb springs stock, need much more than that with a bigger roller cam. The new beehive springs might well solve the problem with Vortecs and the bad stock springs, but still added expense.
Edelbrock Etecs might be a good bet, I had looked into them previously, but not too in depth. The Fast Burns might be another choice, but I'm betting those heads are better suited to high RPM power, not low end torque like the Vortecs.
Dont' forget Vortecs stock require rail rockers, no re-using non-rail stuff.
Mine needed pushrod clearancing I guess because of the cam. Stock Vortec was like .420" max lift.
Flat tops and Vortecs got me around 9.2:1. Should be no problem on 87 since the Vortec chambers are so much better than older heads, but I haven't been able to test them under load yet. Soon.
Pro-toplines are probably a better choice than the Vortecs. Better components off the shelf, same price or less, and seem to be a prety good quality head both in flow and casting. (thicker too)
