jfritts

oh the stress of picking expensive parts that your not sure of. well good luck on it cant wait to see finished product

nissan owner

By the way 185cc AFR will be my choice.

wildcobrar

Ummm, I think a few people need to learn more about cylinder heads before making choices and recommendations.

I would not put a 180/185 anything on a 351 inch engine before looking at cost vs performance. Secondly, everyone finds themselves wanting more performance down the road. So I would also open my choices to heads I can grow into if for example I decided to add cubic inches into the program by stroking the 351.

Joe

AdderMk2

do you ****ing pay attention at all???

nissan owner

Based of flow charts, 195cc Canfields vs 185cc AFR's...the AFR's flow just as good as the canfields, can you explain that? Also Canfields and AFR's are the same price, or can you show me where I can get canfields 1k cheaper, because AFR's are only 1400?

wildcobrar

You do not understand. Bore size also has an effect on flow due to valve placement. Look at AFR 205 Heads. AFR flows them on a 4.125 inch bore. They do so because ona 4.030 bore they drop in flow because of "valve shrouding" at the cylinder wall. There are other heads(that move the valve arrangement(which changes port length, cross section, and how the engine itself see's air/fuel entering the engine) The move in valve arrangement changes short side entry to the bowl, it changes valve shrouding, and changes the way a cylinder fills during the intake stroke.

Guys who understand this get the most value for their $$$$$$$$$$$$$ and they are usually the one that hands you your A$$ at the track or on the street.

Nuff said,

Joe

AdderMk2

first off, AFR205s are $1700... i bought my canfields for 650.. its not my problem that you dont know how to shop for parts.

and i strongly suggest that you stop looking at manufacturers flow tables... those things are so skewed its not even funny.

there are a few guys here with AFR185s on thier 347s and making around 340-360hp. one guy has TFS heads making 380+, and my car, with the canfields is making just shy of 400

take it FWIW but when you arent making the power you want. im merely gonna say "i told you so"

mjr46

I wouldn't attibute their lower hp numbers soley due to heads they have, I gaurantee my afr 185 headed 347 is putting out way more than 360 expecially now with the recent combo reconfigure, but then again et is all that matters to me

irish1

There are a couple things I would like to point out:

1 If you get impatient and select the wrong parts and do not like the way your car runs, then you need to do it again. Doing it 2X costs dearly, you would have been better off buying a really good head to start with. Do it once, the right way.

2 If you are super confused about it, pick up the phone, call someone who knows even if they charge you a little. Nobody who hands out advice for free on the internet is going to help you take care of things if they gave you bad advice.

Matt

wildcobrar

Just curious, what is the combo? compression ratio...............? 185 AFR heads, 347, camshaft..................? Intake................? Headers...............? efi or carb...............? rear gear................? Weight of car with driver................? MPH in 1/4........................? ET in 1/4....................?

I have used AFR 185 heads on quite a few builds. Just curious about your ride. I will share my set up as well if you wish,


Joe