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Old 12-24-2010, 12:20 AM   #1
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Default Old IHI BEGI kit (system 3)

Currently installing a beautiful used intercooled kit I bought for my 91.
It looks like an early Corky Bell IHI s3. This has been confirmed by Stephanie at BEGi by looking a pictures and appears to also be the same kit as the very early flyin miata kits.
Going to tune it with a used AEM standalone because the FMU and MSD freak me out a bit.
Anyone have experience with this kit?
Got any maps I could use as a starting point to save some dyno time?
Any tips, dos and dont's, advice on what to expect from the kit etc?
Also, is it worth the effort of swapping out the 1.8 injectors from my other car for the 1.6 injectors?
Bigger injectors are not in the cards right now unless I find a seriously killer deal on some.
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Old 12-24-2010, 12:51 AM   #2
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Originally Posted by Hemiarch View Post
Bigger injectors are not in the cards right now unless I find a seriously killer deal on some.
1.6 injectors will tap out before you hit full boost. You need larger injectors, that's not an option. If you want to install the AEM and leave the FMU in place to boost fuel pressure, that's a viable option for now, but I would suggest getting a set of Rx7 injectors and having them cleaned/flowtested for a cheap injector option.

Standalones are not magic - you can't just slap a turbo in with the stock injectors and expect it all to work.

Do you have a wideband?
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Old 12-24-2010, 12:58 AM   #3
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I realize they are not magic . I had planned to keep boost down only to what my injectors could handle initially which I figured was about 6 psi.
Can RX7 injectors be had pretty cheaply? What years would you suggest?
Yes. Have a Wideband.
Kind of ran out of financial gas and trying to save what I have for enough dyne to map a safe setup.
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Old 12-24-2010, 12:59 AM   #4
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460's/550's can be had for 60-200 depending on your deal finding skills and whether they've been cleaned/flowtested or not


Throw everything on, throw on 1.8 injectors, bump up fuel with fmu to squeeze a bit more fuel out of em, probably get to 200whp and start saving up for injectors.

Boost is addicting.
Only old men and girls stay at 5psi for any significant period of time
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Old 12-24-2010, 01:03 AM   #5
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Originally Posted by 18psi View Post
460's/550's can be had for 60-200 depending on your deal finding skills and whether they've been cleaned/flowtested or not


Throw everything on, throw on 1.8 injectors, bump up fuel with fmu to squeeze a bit more fuel out of em, probably get to 200whp and start saving up for injectors.

Boost is addicting.
Only old men and girls stay at 5psi for any significant period of time
I needz man turbo so I can run 25psizzzz. Really, PM this guy, he says he has 440's. https://www.miataturbo.net/miata-parts-sale-trade-5/garrett-gt28-begi-cast-coated-manifold-begi-seperated-gases-downpipe-54529/

Get big injectors and be done. Since you sprung for an AEM instead of a megasquirt you must be loaded, so you can throw a few bills at injectors. Seriously though, 10 psi is my minimum now.
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Old 12-24-2010, 01:05 AM   #6
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About 8psi intercooled is where I want be at this point. What's the cheapest injector I can get that will do this reliably without FPR? Already installed a walbro.
I can probably get something back money wise by selling the BEGi FMU and MSD that came with the kit.
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Old 12-24-2010, 01:07 AM   #7
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I actually got the AEM used with the Wideband for 500 which I thought was a decent deal albeit not smoking.
Wish I were loaded though.
I'll pm the guy. Thanks.
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Old 12-24-2010, 01:08 AM   #8
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Quote:
Originally Posted by Hemiarch View Post
About 8psi intercooled is where I want be at this point. What's the cheapest injector I can get that will do this reliably without FPR? Already installed a walbro.
I can probably get something back money wise by selling the BEGi FMU and MSD that came with the kit.



Go get supra 305's.
Go ahead.
Do it the stupid way.
Its your car.
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Old 12-24-2010, 01:09 AM   #9
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Originally Posted by Hemiarch View Post
I actually got the AEM used with the Wideband for 500 which I thought was a decent deal albeit not smoking.
Wish I were loaded though.
I'll pm the guy. Thanks.
That is a really good deal.
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Old 12-24-2010, 01:15 AM   #10
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Sweet. Dude wants to sell the 440cc injectors for $80. Good deal?
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Old 12-24-2010, 01:16 AM   #11
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Here comes the airplane....MRRRRRRRRRRRAHHHHHHHHHHHHHAAHHHHHHHHHH HHH THPPPTHTHTHTHTHTHTHTHTHTHTHTHTPPPPPOOOOOPPPPPPPPPP .

http://cgi.ebay.com/ebaymotors/315cc...Q5fAccessories

Those should be good for 8-10 psi.
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Old 12-24-2010, 01:17 AM   #12
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I'm not really sure what to look for though.
Never bought injectors before.
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Old 12-24-2010, 01:18 AM   #13
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Quote:
Originally Posted by Hemiarch View Post
Sweet. Dude wants to sell the 440cc injectors for $80. Good deal?
What is the impedance. I just sold supra 440's and resistor pack for 85 or 90. I forget ask gospeed. If they are low impedance you need resistors or to adjust pulsewidth modulation,
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Old 12-24-2010, 01:22 AM   #14
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Just txt him. He says they are rx7 low impedance pnp 440cc.
$80. Is this what I need? Good price?
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Old 12-24-2010, 01:32 AM   #15
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You would need resistors. 10 ohm resistors on each injectors or a honda resistor pack for which i have a super awesome diagram. There may also be a setting or something in your aem (I dont know crap about those, search) where you can run low impedance injectors straight up.

Edit: Even though I am feeling mighty nice, you could post in the AEM forum and ask, or read the directions. I wont go that far for you.
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Old 12-24-2010, 01:40 AM   #16
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I appreciate the help.
Where might I find this super awesome diagram?
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Old 12-24-2010, 01:42 AM   #17
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In your pm box in a few minutes.
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Old 12-24-2010, 03:15 AM   #18
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Thanks for the help.
Good diagram.
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Old 12-24-2010, 07:36 AM   #19
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Head over to the Rx7 forums and ask for naturally-aspirated S5 NA FC injectors - they were in Rx7s from 89-91. You should be able to get a set for about $50. Send them to Witchhunter or InjectorRehab or someone like that - you should be able to have them cleaned and flowed for $16-18/injector. You end up with a fresh, clean set of 460cc injectors for right around $120 - I ran my first setup with an MSPNP, Rx7 460s and a Walbro 190 for quite a while (sold them for RC750s, then swapped the 750s for ID1000s). At stock fuel pressure, 460s and a Walbro will support fuel for ~240whp. 550s and a Walbro will do just under 300whp. Beyond that you should be doing ID725s or ID1000s.
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Old 12-24-2010, 12:17 PM   #20
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Quote:
Originally Posted by Savington View Post
1.6 injectors will tap out before you hit full boost. You need larger injectors, that's not an option. If you want to install the AEM and leave the FMU in place to boost fuel pressure, that's a viable option for now, but I would suggest getting a set of Rx7 injectors and having them cleaned/flowtested for a cheap injector option.

Standalones are not magic - you can't just slap a turbo in with the stock injectors and expect it all to work.

Do you have a wideband?
If you don't run too much boost you can get stock 1.6 injectors to support up to 165ish whp. My friends 92 miata with a greddy kit, stock injectors, and an e-manage was running just fine at 168whp (dyno dynamics).
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