Im having a 383 built from golen. Im trying to pick a set of heads to go on my new motor.. I want a ton of torque and cant spend much.. I was looking at the 180CC heads at first, they flow 262 @ .600 lift.. Velocity is nice and is going to give me the torque i want. But the 195CC lt4 heads flow a bit better. I cant decide which ones to go with.. If I go with the LT4s My car wont be running for awhile with that long wait for them.. The guy a golen told me that the 180cc heads are actually 190cc. If thats true I dont know.. I would think it would be better for me to go with the LT1 heads and use my intake and not have to worry about anything else.. But I want a few opinios.. If you think I shoud go bigger then by all means say something.. Torque is mainly what i want. Which way would be the way to go for me? Im also going to need help picking out a cam.. I dont want to rev my setup past 6500.. I was thinking of a cam like this 248/252 .605/.611 112LSA.. Im getting this motor in my 95Z as a daily driver, so i dont want anything to radical, but i want to blow the doors off anything i come up against.. Guys, help me out plz...

Thanks
Nick

 

This belongs in "LT1 Engine Tech"..... moving it there.

 

You would be better off having your stock castings ported than going to an unported AFR head. The cam is quite large for an HR cam, it would not do what you want, which sounds like have a lot of torque and throttle response at low to mid revs. Cam choice and optimal compression ratio are intimately related. If you do a search over in "Advanced Tech" about "Dynamic Compression Ratio" you will learn quite a bit about this topic.

Rich Krause

 

can you get more out of the afr heads than the stock heads? hp & tq wise.
like what he said say the 180cc afr's ported vs. stock ported. I know the afr's ported are going to run you so much more but is there any benifit to going that route?
-b

 

The potential is there in the AFR 195. That head can make really good power on a ~350 displacement motor. The nice thing about the AFR's besides the thicker deck, is there ability to be ported very large. There's just more to work with there. So, if somewhere down the road, you decide to build a 383 or 396 there's some peace in knowing the head can be made to work well on a moderate rpm build.

Just some things to think about.

Factory heads are not necessarily designed with heavy porting in mind. The coolant passages are often larger. So while you can make nice power with the factory head, it is a bit limited. Keep in mind that there are guys making ~450 hp to the rear wheels on factory castings. So my points are based around building something more towards the upper end.... ~500rwhp or better. So keep your goals in mind.

-Mindgame

 

The heads I choose are going on a 383 with a 4340 rotating assembly and 10.50:1 compression

 

You are going about this a bit backwards. You should not be choosing your CR until you have decided on a cam. You do not need large intake ports to build a "torquer" and they may hurt. The AFR's have a lot more potential but it's predominately useful in a higher rpm motor. Out of the box AFR's are mediocre, they need good porting to work well. The full CNC porting from AFR is decent, but you are talking about a $2,500 set of heads if you add in porting. Not knocking the AFR, I use a set. Just trying to give some info.

Cam suggestion: CC XE lobes #3190/3192 on a 112LSA installed or ground 4-6 degrees advanced. 214/224 @ 0.050", .565/.605" with 1.6 rockers. Should work good with 10.5:1 if that is already fiaxed but might allow a bit higher CR. It will be a "torquer" cam and run out of steam at about 5,900-6,000rpm.

Rich

 

call loyd elliott tell him you are building a 383 stroker and have your stock heads done they will flow at least 270 and get lloyd's custom cam, to match everything. my friend bill did this and he will have a pretty stout car when all is said and done.

 

Actually Im going with the LT4 210cc heads that AI is selling in the for sale section.. They are a 75% port from CNC.. Those and a cam a with a bit more duration then the GM847 seems the way im going..

 

I think we aren't talking the same language. 210cc heads and a cam >847 doesn't seem like a setup optimized for a torquey daily driver? But good luck anyway.

Rich

 

Well the thing is I want it to lope like there is no tomorrow.. I know that doesnt really matter.. I just dont want a normal sounding car. thats me and people are trying to talk me out of it.. What do you think a good cam would be to make some torque up and keep my lovely lope.. I had a CC306 in the car before, that wasnt enough lope for me honestly and it was very streetable to me.. I could live with that lope though as long as i can make some torque up for it..

EDIT:: the other cam combo i was looking at was a 236/244 .568 .577 112LSA.. A bit more duration and lift on the intake side, then the 306.. but more air would give me less torque.. no?

 

I'm glad I moved this out of Advanced Tech....

First you want to compare the 180 and 195 AFR's because
Then you decide you want AFR 210's:
Because.....
Why did you even bother asking and wasting everyone's time, when you were not really interested in anything other than "lope"?

 

Ok.. Im asking what cam can I get with lope and torque.. smart ***..

 

Hmmm, I think you need to redefine exactly what you want. Lope is all about overlap. Use Rich's recommendation on a 106 or 104 lsa and it'll lope.

Never have understood the fascination with "lope > hp".

-Mindgame

 

Why are you guys being smart asses? Im asking a question.. isnt that what this board is for? Wont the 210cc heads give me more HP and TQ then the 180cc LT1 heads?? OK then after that question, I want a cam thats going to make some torque, but also lope.. I was hoping you guys could give me some suggestions..