Ported 99' BP-4W head and Gutted Intake - Miata Turbo Forum - Boost cars, acquire cats.

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Old 07-22-2012, 04:55 AM   #1
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Default Ported 99' BP-4W head and Gutted Intake

I ported these over the winter for my track car project. But I have since decided to stick with the 1.6 shortblock, therefore I no longer have any use for these.

The head has a mild port job consisting of a gasket match, bowl blending, and de-shrouded/polished chambers. The oil drain passages have also be radiused to improve oil drain-back.

The head needs the seats touched-up and the deck surfaced while it is apart. I can have this done locally for an additional $140

(I also strongly suggest installing +1mm valves, this would greatly improve the bowl to valve seat transition which is really poor on the BP/B6 engines - let me know if you are interested)

The head comes complete with valves/springs/cams/lifters/etc.

The both portions of intake have been gutted, including the EGR passages through the upper half near the TB. The EGR passage in the lower was treaded and plugged, so you can keep the EGR valve located on the back of the intake (stock appearing for those who live in states like California)

intake includes the fuel rail/FPR and miscellaneous brackets.

asking:

$500 for the cylinder head
$300 for the intake manifold























Attached Thumbnails
Ported 99' BP-4W head and Gutted Intake-cimg4991.jpg   Ported 99' BP-4W head and Gutted Intake-cimg4989.jpg   Ported 99' BP-4W head and Gutted Intake-cimg4995.jpg   Ported 99' BP-4W head and Gutted Intake-cimg4998.jpg   Ported 99' BP-4W head and Gutted Intake-cimg4997.jpg  

Ported 99' BP-4W head and Gutted Intake-cimg4988.jpg   Ported 99' BP-4W head and Gutted Intake-cimg4968.jpg   Ported 99' BP-4W head and Gutted Intake-cimg4973.jpg   Ported 99' BP-4W head and Gutted Intake-cimg4972.jpg   Ported 99' BP-4W head and Gutted Intake-cimg4971.jpg  

Ported 99' BP-4W head and Gutted Intake-cimg4978.jpg   Ported 99' BP-4W head and Gutted Intake-cimg4979.jpg  
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Old 07-23-2012, 06:34 AM   #2
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If I had the cash, I'd be all over this ---- like white on rice. Unfortunately this is just a free bump. Good luck with the sale. I'm sure it will go quickly.
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Old 07-23-2012, 03:34 PM   #3
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Edit: NM - I didn't read properly. Not interested. Sorry.

Last edited by stefanst; 07-23-2012 at 05:43 PM.
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Old 08-13-2012, 07:30 PM   #4
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I have a complete stock BP-4W head and intake manifold that I am also putting up for sale as well...
Both are in good condition.

$350 obo for the head.
$100 for the intake manifold.

Here is a photo of the stock head.





Attached Thumbnails
Ported 99' BP-4W head and Gutted Intake-cimg5026.jpg   Ported 99' BP-4W head and Gutted Intake-cimg5025.jpg   Ported 99' BP-4W head and Gutted Intake-cimg5027.jpg  
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Old 08-13-2012, 08:46 PM   #5
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So the ported head comes with the factory valvetrain but your recommending going with 1mm over sized . PM me what is the best price you could do with the extra work needed .
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Old 08-14-2012, 11:18 PM   #6
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PM sent.
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Old 08-15-2012, 12:13 AM   #7
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Nice gut. Doing that is a real pain in the ***. Worth something.
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Old 08-16-2012, 12:47 AM   #8
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Will the polished IM work well with an oem head or is it pointless?
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Old 08-16-2012, 02:24 AM   #9
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Quote:
Originally Posted by Kinavo View Post
Will the polished IM work well with an oem head or is it pointless?

Yes it would.
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Old 08-16-2012, 09:20 PM   #10
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Default Stock bp4w head

I'm interested in the stock head. I can't pm you cause I'm a new member. Need a shipping quote. I have PayPal. Thanks, Mike.
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Old 08-17-2012, 06:08 PM   #11
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Quote:
Originally posted by Faeflora
Nice gut. Doing that is a real pain in the ***. Worth something.
Gutting the intake was a PITA! It took a solid 8 hours. This is the last one I will ever do (unless someone is willing to pay me $800 for it)

There are some results that show a HP gain a higher RPMS, so it is a worthwhile mod for some people. Take a look at the link below:
https://www.miataturbo.net/general-m...testing-66901/

In my opinion BP intake manifold design is crap, especially these... but what better options are there, aside from going to a JDM/Euro Square Top or fabricated manifold.

Performing the gutt essentially turns this manifold into a short runner intake that has a huge plenum, the short runners are good for high rpms but it hurts spool. The increase plenum volume should decrease flow variations from cylinder-to-cylinder and improve VE especially in the #1 cylinder.
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Old 08-17-2012, 06:21 PM   #12
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Quote:
Originally Posted by Flyin4stroke View Post
I'm interested in the stock head. I can't pm you cause I'm a new member. Need a shipping quote. I have PayPal. Thanks, Mike.
USPS says it is approximately $100 for Priority mail to 32719 zip. They have a "Parcel Post" for $60 but I have never used this method, so I am not sure if there are restrictions that would exclude shipping a large/heavy package or how long it would take.
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Old 08-17-2012, 07:03 PM   #13
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Shoot me a pm I'll give you my info then I can send the monies. Thanks.
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Old 10-01-2012, 02:56 PM   #14
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Ported Head, Stock head + intake are SOLD.

Gutted Intake is still available!
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Old 10-08-2012, 04:40 PM   #15
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God that porting on the intake is clean, very nice work.
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