Head Flow

[twilightprotege]

Hey,

We'll i just called the place where i'm getting my head ported to double check the head will be ready thursday and to make sure they did a before porting flow test so i can see what gains i got from porting the head...and yep you guessed it, they forgot. yay. beers all round!!!! bloody idiots. :mad:

anyway, has anyone had the stock head flow tested and have the base figures?????? i know it's a long shot, but i'd never know if i never ask

 

[Installshield 2]

Hey,

We'll i just called the place where i'm getting my head ported to double check the head will be ready thursday and to make sure they did a before porting flow test so i can see what gains i got from porting the head...and yep you guessed it, they forgot. yay. beers all round!!!! bloody idiots. :mad:

anyway, has anyone had the stock head flow tested and have the base figures?????? i know it's a long shot, but i'd never know if i never ask

That sucks dude...I don't have any specific flow ratings, all I know is that it is bad...So if you get a flow test that isn't "bad" after the head work that will be good...

Haha, sorry i couldn't be of more help...

 

[twilightprotege]

yeah i wasnt very impressed that they "forgot". hmmmmm

so what's a good flow rate, like in cfm or whatever??? or should i ask, what's bad???

 

[Installshield 2]

what is good varies from engine to engine...so flow rates for an FS are useless unless we can find the stock head's rates...

Try contacting Keith at www.fmprotege.com ... they did some very extensive work with the FS in development of their turbo kits...that is from what I remember where I heard about the stock head being relatively bad for flow...they might have more info on this...Hell contact Terry at Spool-turbo and the guys at High-boost...one of those companies "should" have done at least some tests on the stock head...

being that the FS is undersquare, it utilizes fairly small valves...which promote good high speed flow through the head at low rpm, but the air gets confused quickly as revs increase...yet another reason on the FS's poor high rpm breathing...To my understanding it is more the valve size and port size that are the main causes of the turbulence and poor breathing at high rpm, rather than the head's casted surfaces (which are decently smooth in mass production terms)...

I am like you, I need on paper evidence to prove that a modification is worth while..It is really bad that they screwed you, and it would make me worry about their competance altogether...I will do my best to find you some flow charts and specs for the stock FS's head...You can also check out www.probetalk.com and ask some of the 2.0L guys about headwork...you may find some more info there as well...

 

[TheMAN]

oh god.... what a big ******* mistake

now you won't ever know whether you gained anything or not

the FUCKTARDS NEED TO FLOW TEST THE s*** FIRST

anyone who just skip step one is a FUCKTARD and needs to be a shot and also is an incompetent rip off shop

and there is no "good flow rate", we DON'T KNOW.. every engine is different... not just the same kind of engine.. EVERY one is different!

 

[twilightprotege]

yeah i'll email a few of the turbo guys and keith at fm to see what they say....i'll post here if i find anything

if you can find anything in the mean time that'll be great!

 

[TheMAN]

the probe heads are a lot different than ours

what is good varies from engine to engine...so flow rates for an FS are useless unless we can find the stock head's rates...

Try contacting Keith at www.fmprotege.com ... they did some very extensive work with the FS in development of their turbo kits...that is from what I remember where I heard about the stock head being relatively bad for flow...they might have more info on this...Hell contact Terry at Spool-turbo and the guys at High-boost...one of those companies "should" have done at least some tests on the stock head...

being that the FS is undersquare, it utilizes fairly small valves...which promote good high speed flow through the head at low rpm, but the air gets confused quickly as revs increase...yet another reason on the FS's poor high rpm breathing...To my understanding it is more the valve size and port size that are the main causes of the turbulence and poor breathing at high rpm, rather than the head's casted surfaces (which are decently smooth in mass production terms)...

I am like you, I need on paper evidence to prove that a modification is worth while..It is really bad that they screwed you, and it would make me worry about their competance altogether...I will do my best to find you some flow charts and specs for the stock FS's head...You can also check out www.probetalk.com and ask some of the 2.0L guys about headwork...you may find some more info there as well...

 

[twilightprotege]

yeah edwin i was very very peeved to say the least...fingers crossed FM or spool or hiboost have stock head flow figures....and hopefully before i pick the head up on thursday...

 

[mp5jeff]

if they forgot to check the stock flow, i hope they dont forget to port the heads lol

 

[TheMAN]

the figures THEY give you if they do have it will still just give you a guess of any gains at all

if you actually LOST power or get worse flow numbers than the "stock" numbers were given, then you need to raise hell and:
a) make them buy you a new STOCK head
b) give you a ******* refund for the P&P
c) take the ******* money and go to a REAL shop that knows WTF they're doing

 

[twilightprotege]

oh i can assure you hell wont have nothing on me if i get worse flow numbers and loose power.

i just hate it when numerous people recommend these people, and they do have a really good reputation in my city here and they screw up!

i guess i shouldnt get too mad just yet....i'll see what flow numbers i get

 

[twilightprotege]

ok...well i've sent quite a few emails around and posted on the probe talk site just incase anyone there knows the flow rate

i've also done a little searching around to see what other heads flow so atleast i can get some sorta comparison. the nissan sr20de head stock intake side flows 175cfm and exhaust side flows 154cfm @ 28" of water. i know that's a totally different head (probably much better than ours)....but atleast i have something

 

[p5sundevil]

well then if it is a better head, which we all know it is, then flow rates closer to those is what we would be looking for, of course u still need stock rates to compare.

ill do a search also =P

 

[DooMer_MP3]

Could you email anybody at Mazda? Such as one of the chief engineers that have their email addresses floating around in the MSP forum?

Chris

 

[70]

Hmmm, I think Corky might know....Keith might know from Corky.

 

[twilightprotege]

We i emailed : FM, spool, corksport, awr, tripoint, mazdamotorsports, rr-racing and corky....

so far replies have been "we dont know", but tripoint and mazdamotorsports said call sun belt performance engines on (770) 932 0160 - does anyone know their email address or can someone call them and ask for me since i'm in australia?????

 

[thewrench]

If you don't find anything by tomorrow, I'll call up there. I've used the shop next to them and should be able to at least find a contact for you. Ooo, also try pming wcprotege, he works at a race shop here in Ga that has a Pro NA race car. They have a web site, check back to this post and I'll edit in a link.

Edit: Well their web addy is www.opmmotorsports.com but I'm getting a 403 "forbidden access" error when I try to go there. The shop next to Sunbelt is called Balanced Performance, here is their home page:

http://www.balancedperformance.com/index.shtml

I've dealt with Bryan White there, if he can't find out he may be able to point you to somebody who can.


James T

 

[twilightprotege]

thanks heaps...just about to PM wcprotege now

 

[twilightprotege]

i've just emailed bryan directly...fingers crossed.......

 

[Installshield 2]

the probe heads are a lot different than ours

Agreed...but 2nd gen Probe 2.0L heads are much more similar to ours than a KL V6's or B-series Honda engine...They could give some details on stock flow rates that should at least be in a similar neighborhood to ours, though not identical...