Porting intake to match manifold ?

[Trex72]

Is it worth porting a stock datsun head stamped 210 ? I am thinking about having the intake ports matched to the intake manifold. is it even worth the time/$ to do it ?

[datzenmike]

Worth it? If you mean performance gain ... no. If you mean the fun of working with it yes. But only if the head and manifold are off for other repairs anyway.

[Skib]

if your paying someone to do it, dont bother.

[datzenmike]

I did a couple and found it very satisfying to work with your hands and dream about all the hp you were making. :lol:

[Skib]

I did a couple and found it very satisfying to work with your hands and dream about all the hp you were making. :lol:

 

 

:rofl:

 

 

if its already off and your doing it yourself its fun to do and good practice.

 

Iv got a 210 on my L16 right now two and Im just doing all my port work on a W58 that Ill be swapping on there later

[Trex72]

is the 210 head worth putting a better cam in and twin su's on then run on a l20b ?

[Skib]

is the 210 head worth putting a better cam in and twin su's on then run on a l20b ?

 

 

210 head has terrible flow :(

[datzenmike]

It's for use with an L16 motor. I have heard that it was originally designed for the L14 engine but don't know for sure. Small ports and valves would make it docile and efficient at low speeds. But not much of a screamer at high RPMs.

[Skib]

It's for use with an L16 motor. I have heard that it was originally designed for the L14 engine but don't know for sure. Small ports and valves would make it docile and efficient at low speeds. But not much of a screamer at high RPMs.

 

 

so if your in need of a nice paper weight........

[Trex72]

By efficient you mean good gas mileage ?

[Trex72]

so this thing is a p.o.s . oh well thanks fore the info .

[Skib]

so this thing is a p.o.s . oh well thanks fore the info .

 

 

lol its a good stocker, gas sipping, slow ass grocery getter head :rofl: but if you want to drive it like a proper (fun) car its rubbish

[RoadRace]

i have found that in order to solicit useable advice, you have to know:

1) what you want as the 'end product'

2) $ you intend on spending,

 

and more importantly, be able to ask that question with clarity, to avoid getting information that you don't need.

 

the "is porting my head worth it" thing comes up now and then - and this is totally cool. but i think that if you know what you want from it, you'll get a better, more useable answer.

 

your cylinder head mods fall into "intended purpose" catagories like:

 

1) total DD, stock bottom end, single carb

 

2) street mod, higher comp ratio, cam multi-carb

 

3) turbo

 

4) full competiton

 

and honestly, your 210 head CAN work in any of these applications. i have a big valve, 1.5" intake port small chamber 210 head that was a crappy small stock 210 originally. but getting it there wouldn't be cheap if i had to pay somebody to do it. AND it wouldn't be the best choice in some of the applications listed above due to port velocity requirements for efficiency.

[79D50]

In regards to your head, the 210 is not the ideal choice for performance gains as others have mentioned. Your questions about port matching the head to the intake...here is the answer: Port matching is a necessity and follows proper performance build protocol vs. simply expecting to gain HP by that process alone.

 

The majority of power your engine will produce is derived from the head. You will build your bottom end to withstand the gains and you can contribute to those gains with the right combination of boring, piston choice, bearings, lubrication etc. Think of it as a house. The structure is only as sturdy as the foundation it sits on right? Engines are no different.

 

Back to your head. Port matching is a necessary step when you are modifying your head. Think of it this way, you are improving air flow, improving/increasing fuel/air ratios and detonation. You do not want to restrict any of the flow with irregularities in the port openings of the intake and exhaust. Think of it as a straw. It is one shape from top to bottom and flow is consistent. Now, put a bend or a kink in that straw and what happens to your flow?

 

Now that you understand the simple dynamics, having your intake and exhaust port matched to your head (once the head has been modified to choice) is a smart builders step in the overall process.

 

I hope that helps.

[Trex72]

dang you guys know your s#@t thanks for the info i guess i will be looking for a different head any suggestions on what to get i have a l20b with a street/race cam and twin su round tops i think they are 40 mm ty .

[79D50]

A87 closed chamber peanut would be my personal choice. Heavily worked at the machine shop of course. :cool:

[Trex72]

So I need a better head . I know... that's what she said . Anyway i have a small amount of $ set aside for this "Head project" any of you have a A87 head anywhere near so. oregon ? ty .

[Skib]

So I need a better head . I know... that's what she said . Anyway i have a small amount of $ set aside for this "Head project" any of you have a A87 head anywhere near so. oregon ? ty .

 

 

I have an open chamber W58 you can have, not as great but its better than the 210 and its free.

 

where in S.OR are you?

 

 

personally Im going to run an open chamber W58 shaved for 9:1 CR and Ill be doing a heafty port job on it. not a crazy race head but itl deff be a big improvement over the 210 when its done.

[Trex72]

Are you kidding Skib a free datsun head i must of died and gone to heaven i live in K.Falls Or. and will travel far and wide for free head .

[Trex72]

210 on trade !

[Skib]

Are you kidding Skib a free datsun head i must of died and gone to heaven i live in K.Falls Or. and will travel far and wide for free head .

 

 

I get lots of free head :lol:

this ones just taking up space in my shed.

 

 

Ill be in Grants Pass and Ashland this weekend so you may not have to do to much traveling lol.

[79D50]

I also have a U67 head with a "B" spec L20 cam. It has bigger intake and exhaust valves than your 210 and has some advantage over the A87 if built properly. Again, it all depends on your build specs. If the W58 doesn't work for you we can talk but I live in Seattle.

[hang_510]

I get lots of free head

didnt you say it was better to give than receive?

[hang_510]

I did a couple and found it very satisfying to work with your hands and dream about all the hp you were making. :lol:

dont forget your safety glasses! :blink:

you want to see those dreams come true! ;)

 

 

 

the first one is scary... the others :w00t:

plus youll have one to practice with now.

[nismo dr]

and will travel far and wide for free head .

 

You and me both