home grown semi peripheral build
#1
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I am going to start with a set of used housings I have a drill press and lots of mechanical ability....lol , this is not my daily driver so no rush just looking for some tips on doing this such as port size and bits to use etc.....if you have negative comments keep them to yourself not all of us have deep pockets......I will post pics during the process
Last edited by mopar2ltr; 09-22-13 at 11:01 AM.
#2
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i think a mill would be a better choice, unless you're really good with the drill saw.
Mazda used ~46mm ports on the 13B and ~44mm on the 12A, for the full peripheral engines
Mazda used ~46mm ports on the 13B and ~44mm on the 12A, for the full peripheral engines
#5
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i made a template and used a hole saw bit with a regular drill as well. honestly, it did a good job, but not a great one. i think if i make a better template, then i can do a MUCH better job for the next one. i would imagine a drill press setup would be even better though.
i just flipped through some of my notes and it looks like i went with a 32 mm hole.
as far as this sentiment is concerned, i will offer the following:
(1) why waste time and energy over something you have no control of? (above comment is my case in point)
(2) "negative comments" are indeed sometimes just negative comments. however, sometimes they are just a thin-skinned person's perception of constructive criticism. know the difference.
deep pockets have little or nothing to do with real knowledge and ingenuity.
i just flipped through some of my notes and it looks like i went with a 32 mm hole.
(1) why waste time and energy over something you have no control of? (above comment is my case in point)
(2) "negative comments" are indeed sometimes just negative comments. however, sometimes they are just a thin-skinned person's perception of constructive criticism. know the difference.
deep pockets have little or nothing to do with real knowledge and ingenuity.
#7
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When I did mine, I carefully ground a hole saw until it was a uniform OD at the teeth, made a sturdy jig for the drill press (located the housings off of the dowels for repeatability), drilled pilot holes, used a dowel rod in the hole saw, used a lot of cutting fluid and worked carefully... and the holes still walked a bit.
My only advice is to make sure the tubes DO go all the way through and are at least a light press fit, otherwise the rotor housings can and will collapse at the intake port. It wasn't enough to cause problems but it still worried me a lot.
(And then I eventually said screw it and started building bridge port engines, it's less time-consuming)
My only advice is to make sure the tubes DO go all the way through and are at least a light press fit, otherwise the rotor housings can and will collapse at the intake port. It wasn't enough to cause problems but it still worried me a lot.
(And then I eventually said screw it and started building bridge port engines, it's less time-consuming)
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#8
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i promised myself that i am going to use those housings to fire an engine someday ... and i have no doubt it will. however, i'm back to square one as far as building a good semi-peripheral. i just need to get a few pairs of housings first.
#9
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Part of me wants to do another one, more properly this time with big runners and 52mm throttle bodies. The rest of me says screw that, keep building bridge ports.
The problem is I have like four or five sets of FC rotor housings in usable to excellent condition, but not enough good side housings unless I wanted to build a 6-port. Blah on that. I think I'll try hand lapping some of the trashed T2 parts I still have, see if I can bring them back to life and just use thinner O-ring material to make up for the loss of coolant seal depth.
The problem is I have like four or five sets of FC rotor housings in usable to excellent condition, but not enough good side housings unless I wanted to build a 6-port. Blah on that. I think I'll try hand lapping some of the trashed T2 parts I still have, see if I can bring them back to life and just use thinner O-ring material to make up for the loss of coolant seal depth.
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Lots of good info thank you all. I just tagged the car and am in the processof dismantling the spare engine over the next few weeks. Does anyone have an extra set of useable housings ? Do you have any pics of the bridge porting ?
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comp price on GSL-SE housings are about $400 each... S4 FC are about $100 more and the FD housings are about $200 more ($700)
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Nice price on the new housings , is there a place in or around the Tampa Florida area that will make a set of peripheral housings? I am curious on how much that would cost.
#16
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can't say for sure about the Tampa area, but there should be a few trustworthy places in the Orlando area and also Southern Florida. i know Carlos Lopez is down there and for sure he can do the job. you may want to check the Regional forum to know about Tampa for sure though.
price? that will probably vary from place to place. i would say figure on something between $600 and $1000 - give or take. last time i checked Defined Autoworks' (not Florida, but if i were to pay someone, he would be my first call.) they want $800 if i recall.
price? that will probably vary from place to place. i would say figure on something between $600 and $1000 - give or take. last time i checked Defined Autoworks' (not Florida, but if i were to pay someone, he would be my first call.) they want $800 if i recall.
#17
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can't say for sure about the Tampa area, but there should be a few trustworthy places in the Orlando area and also Southern Florida. i know Carlos Lopez is down there and for sure he can do the job. you may want to check the Regional forum to know about Tampa for sure though.
price? that will probably vary from place to place. i would say figure on something between $600 and $1000 - give or take. last time i checked Defined Autoworks' (not Florida, but if i were to pay someone, he would be my first call.) they want $800 if i recall.
price? that will probably vary from place to place. i would say figure on something between $600 and $1000 - give or take. last time i checked Defined Autoworks' (not Florida, but if i were to pay someone, he would be my first call.) they want $800 if i recall.
CLR is doing mine Semi P Port.
If your paying 600-1000, than your paying way to much.
Last edited by BLACK MAMBA; 09-24-13 at 06:40 AM.
#18
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well, at the moment i still plan to build my own, so i'm paying whatever it will cost me in housings and aluminum pipe. as i alluded to, my backup plan (if i prove to be an utter and hopeless FAILURE) was Defined.
out of sheer curiosity:
1. how much is he charging you?
2. did you know him or have any relationship (i'm sure you know i don't mean it like that) with him before this?
out of sheer curiosity:
1. how much is he charging you?
2. did you know him or have any relationship (i'm sure you know i don't mean it like that) with him before this?
#22
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i guess if you have a jig for it, it should be a really quick process. really setting up the machine from scratch is probably the hard part.
#23
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The question you then have to ask yourself is, why is this shop so much more in demand, and maybe it really is worth it...