chance to get bigger INTAKE valves...
#1
![Exclamation](https://www.mazda3club.com/images/icons/icon4.gif)
hey guys, check out this link:
http://www.miataforum.com/ubb/ultima...c;f=1;t=011295
to sum it up, there is a guy getting 35mm intake valves custom made...he'd like to do this as a 'group buy' - $200 plus shipping for the 8 valves...
evidently it'll work with all BP heads - 1st gen and 2nd gen
any observations on the thead or the idea behind it??.......i'm thunking about doing it
http://www.miataforum.com/ubb/ultima...c;f=1;t=011295
to sum it up, there is a guy getting 35mm intake valves custom made...he'd like to do this as a 'group buy' - $200 plus shipping for the 8 valves...
evidently it'll work with all BP heads - 1st gen and 2nd gen
any observations on the thead or the idea behind it??.......i'm thunking about doing it
Last edited by protejay; April-3rd-2002 at 10:09 PM.
#2
doesn't the guy also say that you have to have the head reworked to get those to fit in ? I dunno man sounds exspensive to me. How long can you be without your car, me 1-2 days tops and whats the price behind having your head reworked ?
#3
mazda disciple...
....i was thinking about it mainly from the idea of getting some parts together for the likely future rebuild.
IT WOULD take some time and cost some $$$ for a head job(unless you could do it yourself
)...
just thought some may want to know about it!
and for Psuedo or whoever else
( a 'dumbby' question from the guy who posted the thread
) :
why EXACTLY does a larger valve give more power?
it SEEMS like the fact that it is bigger, thus takes up more space? would hinder flow....
IT WOULD take some time and cost some $$$ for a head job(unless you could do it yourself
![Smilie](https://www.mazda3club.com/images/smilies/smile.gif)
just thought some may want to know about it!
and for Psuedo or whoever else
( a 'dumbby' question from the guy who posted the thread
![Smilie](https://www.mazda3club.com/images/smilies/smile.gif)
why EXACTLY does a larger valve give more power?
it SEEMS like the fact that it is bigger, thus takes up more space? would hinder flow....
![Frown](https://www.mazda3club.com/images/smilies/frown.gif)
#4
![Wink](https://www.mazda3club.com/images/icons/icon12.gif)
Originally posted by PseudoRealityX
I'd say its a good upgrade.
I'd say its a good upgrade.
![Smilie](https://www.mazda3club.com/images/smilies/smile.gif)
on a more serious note....my engine has 200,000 miles; if the rings checked out OK with a compression test, do you think i could get away with JUST a head job INSTEAD of a complete rebuild? in other words, the internals of the BP would be 'healthy' enough to last maybe a 100,000 more miles??
the reason i ask is the valves may come in handy sooner than i think
![Smilie](https://www.mazda3club.com/images/smilies/smile.gif)
#5
![Thumbs up](https://www.mazda3club.com/images/icons/icon14.gif)
so the fact that the BP head is designed in such a way that it CAN accomodate a LARGER valve obviously means that the 'port' can also be enlarged...all of which results in better flow....! they all compliment each other...
thanks man for the reply - it helped my mind click!![Smilie](https://www.mazda3club.com/images/smilies/smile.gif)
all of this reminds me of the 91 brochure that says of the DOHC engine having 'bigger valves for deeper breathing at high rpm'
thanks man for the reply - it helped my mind click!
![Smilie](https://www.mazda3club.com/images/smilies/smile.gif)
all of this reminds me of the 91 brochure that says of the DOHC engine having 'bigger valves for deeper breathing at high rpm'
#7
![Wink](https://www.mazda3club.com/images/icons/icon12.gif)
thanks again Psuedo, your 'block' info WAS interesting.... i just was wondering more about the actual 'mechanics' of installing the larger valves...it took my cranium a little time to connect the dots :_+))
and yes, i'd rather do the complete rebuild, but that will prob be a GOOD ways off and will take $$$$.... but since we're talking rebuild.....
i've seen the overbore wiseco pistons that can basically turn the BP into a 2.0; let's say you rebuild with those at a 10:1 compression, maybe higher....will you absolutely NEED a standalone? or is it NEEDED mainly to get the MOST out of the engine? i guess i'm asking if you'd be OK without it....
and yes, i'd rather do the complete rebuild, but that will prob be a GOOD ways off and will take $$$$.... but since we're talking rebuild.....
i've seen the overbore wiseco pistons that can basically turn the BP into a 2.0; let's say you rebuild with those at a 10:1 compression, maybe higher....will you absolutely NEED a standalone? or is it NEEDED mainly to get the MOST out of the engine? i guess i'm asking if you'd be OK without it....
#10
Re: Group Buy
Originally posted by zenilder
You mentioned the guy was looking for a group buy...
Has anyone jumped in on the buy? Might be something I would like to get.
You mentioned the guy was looking for a group buy...
Has anyone jumped in on the buy? Might be something I would like to get.
And i'm
![Frown](https://www.mazda3club.com/images/smilies/frown.gif)
Oh and guess what? When i started my car last night after it had sat for 2 days, i had the usual 'lifter noise', BUT one? of the lifters (1st time its ever happened) kept 'at it' for a few seconds
![Frown](https://www.mazda3club.com/images/smilies/frown.gif)
#13
Re: Re: Group Buy
Originally posted by protejay
I PM'd him over on the miataforum and he said that there's been 'a pretty low' response so far...he still wants to do it; just waiting on more interest.
And i'm
, but i don't think this will work on the DX SOHC; as the valves and their 'seats' are bound to be different?!
Oh and guess what? When i started my car last night after it had sat for 2 days, i had the usual 'lifter noise', BUT one? of the lifters (1st time its ever happened) kept 'at it' for a few seconds
I PM'd him over on the miataforum and he said that there's been 'a pretty low' response so far...he still wants to do it; just waiting on more interest.
And i'm
![Frown](https://www.mazda3club.com/images/smilies/frown.gif)
Oh and guess what? When i started my car last night after it had sat for 2 days, i had the usual 'lifter noise', BUT one? of the lifters (1st time its ever happened) kept 'at it' for a few seconds
![Frown](https://www.mazda3club.com/images/smilies/frown.gif)
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