I've decided on the new AFR 195cc eliminators to replace my edelbrock rpm 170s....the fully cnc'd patriot super street 195cc looks very good too but the AFR flow numbers were distinctly better at relatively lower lifts. My current comp NR288 cam will be gone also. Lets get to the point, my two cam choices(custom grinds) are 234/242@.050 and .565"/.575" lift on a 110lsa or 230/238@.050 with the same lift and lsa as the first. My compression will be up to about 10:63:1 from 10:2:1 with the afr 65cc chambers down from the edelbrock 70cc chambers everything else being the same. The thing is i'm looking for high 11s-low 12s on motor coming from 13.2-13.4 @ 5800ft altitude and then spray a small 100-125 shot max for high 10s RELIABLY all day(whole 355 shortblock is forged and studded). The question is, will either of those cams with the afr heads make the numbers on motor without any fuss??. Other top end pieces include a rpm air-gap manfold and a holley 750dp.
P.S- anyone heard about the new 195 afr's have to "modified" for dome pistons? i'm running a set with 2.4cc reliefs and a .100" dome. If thats the case, I might have to go with the patriot super street heads.

 

i am having a hard time seeing you pick up 3 sec with that swap...

i havent heard anything about the AFRs needing modification for dome tops not saying it isnt true...

i would go with 240/248 @.050... wait was that one of the choices?

 

I said high 11's-low 12s on the motor and then a 125shot max to get me into the 10s. Why you suggest such a long intake duration? the thing would have an overwhelmingly choppy idle with a 248 exhaust duration and a 110lsa, its street driven pretty regularly.

 

well not if you want to get close to 11 sec which your not really close check out this members car.... read some of his threads about getting into the 11s

https://www.thirdgen.org/forums/vbga...ber-48691.html

 

thats a good setup but honestly I don't think I need nowhere near some of what he's runnning for me to get at least low 12s on motor...its more about properly matched parts and tune, not hogged out heads, a cam the size of a baseball bat and farm tractor rear gears.

 

maybe...maybe not but remember that was a 383... mid 12s wouldnt be to difficult but mid to low 11s.... i think it will take a bit more than you are expecting

 

at 5800 ft that kinda makes things hard..the DA could be upwards of 8000 ft on some days i bet making 12's a VERY quick car

but between your two cams they will both make within 5-10hp of each other. You cant go wrong with either one. Assuming they are hydraulic rollers by the specs?

slightly wider duration spread of the first cam will probly act better with the nitrous and give you a wider topend power band. I'd go with the 234/242. Thats same duration as one of the lunati cams i think as well as the GM847 grind, both popular cams and work well with AFR heads

I think having compression alittle higher would help on motor but with the spray 10.6 is good. Just run a colder plug and retard timing 4-5 degrees for a 125 shot i'd say. Keep an eye on the plugs and such to make sure your not detonating.

Should ride out quickly but if you go low 12's on motor at that altitude, a 125 shot may only push you bottom 11's

What are you doing about trans/gear/stall? Whats the cars weight?

As far as AFR heads and those dome pistons, i'd check for clearance for sure. But i think you will be ok i have a 230/245 cam ona 109 lsa in my 383 with over .600 lift and i'm pretty clear on the exhaust side with flat top pistons and .041 gasket on zero decked block. with a .100 dome tho, you will be much closer to those valves. But you have abit less duration and less lift so it may be just fine.
Definately want to do the clay test

 

the cars's weight is 3376 with me in it(160lbs), built bowtie overdrive 700r-4 with edgeracing 9.5" 3200 stall and 3.73 gears. I have a free converter restall from edge and i'm thinking of using it to get a 36-3800 stall on it. A 36-3800 stall along with the first cam I mentioned, 3.73s and the 3.06 700r-4 1st gear should make for a really sweet launch on motor....on nitrous, that launch would make me all .

 

i'll be running similar setup actually. near same weight as you and 3500-3600 ish stall from Edge but for now i'm using 3.42 gears and will have 3.73's or a 12 bolt with 3.73's or 4.11's eventually with the shot, i'd keep where your at. It will stall a good 200-300 rpms higher with a 125 shot off the line

But then again you cant go wrong with a free restall at 3600. I'd keep it there and on the nitrous it should act more like a 3800-4000

 

hey Orr89RocZ, I was just looking this lunati cam....really like the specs but all i'd change is the lift figures to .560/.570, not so familiar with what exactly the intake center line does or how it affects things...it seems a little tight on that cam though @ 104* how would overlap and all that other good stuff be on that cam and how nice of a cam would it be for my combo?
http://www.lunaticamshafts.com/Produ...d=1859&gid=264

 

That cam would be very nice as well. One of the guys over at stealthram.com was running that in his combo and was doing 11's but at a lower altitude. Should get you 12's where your at i would think at that weight

That cam is to be installed on a 104 intake centerline. 110 lsa is good since you have a carb. 104 ICL means the cam has 6 degrees advance built in when installed at 104 ICL. Thats alot of advance and will make good low/midrange power at the sacrifice of topend. most cam grinders put in about 4 degrees of advance. My custom grind has 1 degree for better topend but gives up mid range torque

If you put that cam on a 106 ICL, it be almost identical to the 288HR xtreme energy grind from comp cams in terms of valve events on the intake. Both are probly very similar in performance. comp has abit steeper ramp rates but its easier to control the lunati cam at higher rpms i'd say just by lookin at the ramp rates via duration at advertised compared to duration at .050". Plus the degree split will help with the nitrous

it has 72 degrees of overlap so it should work good on a 355 for high rpms, but it will be a choppy idle thats for sure and will require some good tuning but with carb you should beable to dial that in.

 

thanks man, i have a better understanding now. I'm likiing the 104ICL if its gonna give me more "usable" torque especially on motor rather than winding it to 7k

 

Well its going to be the comp XR288HR with all the specs the same except for the lift numbers which I will order it with .560/.570 or .570/.580 when i decide here soon. Called lunati and a jacka$$ was trying his best to convince me I needed a POS one size fits all "voodoo" cam....a lot of these "techs" think they know EVERYTHING because they work for a cam manufacturer when in fact most of them don't know their *** different from a hole in the ground.