[rcm600]

I am building a 331 with roughly 450 horse. This will be in a 2500 pound mustang. This will be a limited use street car. It will spend time at the strip. I don`t want to loose a lot of low end. I want a radical setup, but not too much that it will only be strip oriented. Any opinions ?

 

[dfree383]

Z304's......... just my .02, I do not care for AFR Heads and have blown alot of the off the track....

 

[mstngjoe]

What cam in your 331?

 

[protouring1]

At least it wasn't another AFR vs TFS thread again!! LOL

 

[mstngjoe]

On 2006-03-13 19:18, EricButler wrote:
At least it wasn't another AFR vs TFS thread again!! LOL

Yeah well, the result would be the same.

 

[dfree383]

You know it !!! Give it some time !! LOL

 

[rcm600]

My cam depends on what heads I choose. I would like a solid roller with at least 240 degrees @ .050". How much of a horsepower and torque difference between the 2.

<font size=-1>[ This Message was edited by: rcm600 on 3/14/06 10:06pm ]</font>

 

[dfree383]

The 185's will work for your goal fine and the 205's will do it to with a little more room for future upgrades and maybe a little less low end torque than the 185's.

_________________
1991 LX Mustang 347 C4 combo Mid 11's with the AC on.
1984 Mustang GT 460, Powerglide "Still putting it together" hoping for 9's !!

<font size=-1>[ This Message was edited by: dfree383 on 3/14/06 10:21pm ]</font>

 

[mstngjoe]

On 2006-03-14 07:02, rcm600 wrote:
My cam depends on what heads I choose......

Now that is a very good answer.

Of the 2 heads you're asking about and the way the car will be used....AFR 205s would be my choice....along with a custom spec'd cam.

 

[dfree383]

If your just looking for 450 hp you may not even need that much cam....

 

[rcm600]

I am not really shooting for a specific # on horsepower. I have just been basing my estimate on common hydraulic roller setups. I like radical setups, thats the whole point of this project.

Is 500 realistic on 10.25:1 , AFR205`s, [email protected] .050" solid roller, Victor JR. ? I guess I`ll up my expectations

 

[protouring1]

I just have to ask....Why only 331 if you say you like radical setups?? Don't tell me your affraid of the oil burning issue. 500 flywheel hp is pretty easy these days with the right combo with a 347.

_________________
1968 protouring Mustang 342 stroker, 205cc CNC ported TEA Trick Flows AOD/3000 stall 4.11 9inch posi.

<font size=-1>[ This Message was edited by: EricButler on 3/15/06 10:39pm ]</font>

 

[rcm600]

You can have a radical setup no matter how many cubes you have can`t you ? This is my first stroker. I have been told 331`s FEEL more lively than 347`s. I like rpms, I think this is a good compromise between torque and rpms. Believe me I have been racking my brain between the 2, and in my opinion this should give me exactly what I want.

 

[protouring1]

Yes I agree you can have a wild setup with any cube engine. Now which will make the most power will always be the larger engine if it is built properly. I believe that the "feel more lively" is bs and just some dude's warped opinion. Just go ask some of the guys that have 347s over on the Hardcore 5.0 board that have N/A 347's that run in the high 10's that are streetable if they aren't as lively as a smaller engine, I guess then if this is the case why would anybody build a 408? I am not going to get into the 331 vs 347 debate. I think that is as dumb as the TFS vs AFR thread that are beat to death on these forums. Both will make a great engine for you starting out. Good luck.

 

[rcm600]

Yes, I agree you can always debate the crap out of anything. Power should be relatively the same except for about 20 lbs. of torque difference, from everyone I have talked to. Why are there so many 331 kits if 347s are the clear choice?

 

[protouring1]

Because most people tend to listen to the marketing HYPE!

 

[ou812]

Is 500 realistic on 10.25:1 , AFR205`s, [email protected] .050" solid roller, Victor JR. ? I guess I`ll up my expectations

Well...is this 500 dyno HP, actual track HP or.....
I get this question sooooo much. Real 500 HP with good torque can carry a 3000lb car in the high 10's!
From what I've seen from so-called 500HP engines, they must be based on a computer program or something. I'm not picking on you, so dont get mad...just using this as a way to explain to others that even today, 500HP takes some doing, especially with pump gas and making it driveable, and last.

I think 10.25 is too much for pump gas and not enough for 500 hp from a 331 realistically.
I would estimate actual power if it were dyno'd around 450 depending on the heads, ported or OOTB. 450 isn't bad though, especially from 331 cubes.
Brian

 

[rcm600]

This is the kind of info I was looking for. I am leaning toward the Victor Jrs. just because they seem much cheaper than anything else in this category of head. All out power is not my only concern. I don`t want $600.00 custom headers. I`m under the assumption AFR 205s need custom headers. Is this true?

 

[mstngjoe]

What car is it going in?

 

[rcm600]

A 1980 mustang notch. I`ve been doing chassis upgrades since June. Trans and rear are complete and ready for abuse.