Something tells me the benefits of these valves are not worth the price. Anyone can prove me wrong on that? What do you all think?

 

they can be when your trying to increase compression without changing pistons or when your being creative with OEM pistons to bump compression a little. every .010inch you shave off the head is .2 compression increase approx. so people that are looking to get 11:1 from a b16 motor for example can mill .020inch and add some valves and add .7 to the 10.2 compression with only removing the head. there are parts for every situation.

 

Thank you for your insight omniman. I find a bit of bias though because you sell the igh compression valve sets. Any one else has any insight? Again, I really appreciate your input.

 

I think that the biggest benefit of using them is is the smaller surface area and straight surface that should improve flame travel. But, they also weight more.

 

Good point on both, rushi. But, are their a real reason for flat bottom valves? Can they actually help instead of being like a fine tune on compression?

 

Omniman may sell the valves but he sells both dished and flat so it's not like he's going to give you biased information towards flat valves for nothing. Everything he said is exactly correct, they are just another way of tweaking the compression ratio without having to go into the block to do it which is way more expensive. Same as a 2 layer vs 3 layer head gasket, it's not that one is better than the other, it's the fact that one allows you to fine tune your comp ratio more than the other while still doing its job of sealing.

 

you have a point there, too. My intentions is to have special pistons and rod combo from Blueprint racing soon at 13:1 compression. Since I will be getting into it then the valves for fine tuning will be rendered useless? What do you all think?

 

exactly. Is this a track car or a street car?

 

i prefer the lightest valves i can get. if you've got a 13:1 c/r bottom end, i'd use ITR or stronger/lighter (ss) valves

 

does anybody know exactly how much compression is bumped when going to flat faced valves from a stock dished valve?

 

So shaving .020" off = .4 bump. If adding flat faced valves bring that number to .7 bump, .7 - .4 = .3 and it's literally that simple to figure out.

 

my bad... i read about milling the head, and just skipped the rest of what he wrote. i guess i quit reading a little too soon...oops

 

this car will be solely a street car. I will be needing higher compression for a self conducted research in alternative fuels which can affect the state of Nevada. Basically, My own self-made school project and self-funded so I must know which is useful and cost effective and not. I appreciate your comments so far, man. If I can pull a bit more it will be great as I am a student and wishes to explore more.

I will be using the whole bottom end of an obd1 jdm b16a block. I intend to use most of the small parts like oil pan, oil pump, all the same cooling stuff, harmonic balancer, same intake.

I will be using a gsr head, gsr manifold with butterflies working ( i don't know how just yet)

with with itr intake and b17 exhaust cam
dsm 450 and controlled with obd1 ecu. Basically, use what I got.
The custom and pistons are going to be specially made like I have said earlier.

Naturally aspirated for sure. Are these valves still worth my money? Thanks all as I really do appreciate all the posts.

 

please quit asking if there worth your money. as only you can make that decision.

But you have got great answer's so far. what more do you want?

 

Valves , Good valves.. will create better flow, better combustions and not only all that, but they will increase compression.. Whats the price you keep worrying about.. I got a set of Ferrea high compression valves for 150 bucks.. if money is a problem, keep searching.

 

sounds so so right now. Like if you have the money buy it if not then that is okay. ferrea valves for 150.00? Damn that is cheap. Was it used? I wouldn't have mind picking them up for that price. As of right now, I will put my money somewhere else. thank you for the inputs all.

 

the valves are worth it if you need them.

the valve weight increase is not significant enough to have any negative effects. your not building a formula 1 engine for pete's sake. its a damn street motor. and the OEM valves are so close to optimal flow and shape wise there are no significant measurable hp gains going to whatever fancy aftermarket valve is claiming to increase.

the mistake your making OP is over focusing on really insignificant areas. instead focus on the meat and potatoes of modifications. such as mild compression increases, larger cams, optimized headers, larger exhaust diameter, length tuned intake. intake manifolds, tuning.

the b16 motor is really small and getting an actual 13:1 compression out of it is really hard. even getting into the mid 12's is a chore. and by putting a giant dome on the piston will hurt combustion space effectiveness. also it will increase the octane requirement.

have fun on the wild goose chase. Amen