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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 11-22-2007, 10:37 AM   #1
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Default greddy compatible with 2001?

I'm about to buy a 2001 miata. I want to get the Greddy turbo kit because of it's price ($1249) which is generally cheap I think. but it's for a 1.6 liter but I can get a HKS manifold for $275 to make it fit the 1.8 liter. question is, will it work with the VVT motor cuz I know you gotta cut timing by 8 degrees or so to avoid detonation. can you pull timing on a variable valve timing motor or will a msd timing retarder work on it? and also I think the VVT motor is higher compression so is 5 psi to much for it? and will everything fit right or do I need a different turbo kit altogether? The reason I don't consider other kits is I don't want to pay 3 grand for 200 horsepower and then have to get a clutch and tune and all that. I think the kit and the manifold and an intercooler would still be under $2,000. I just want it to not be painfully slow (like when I test drove it). I figure 5 intercooled psi thru a quick-spooling turbo the car would be alot more fun for not much money. don't try to talk me into bigger turbos, I just want to know if this will fit without me having to get too creative with a cutting wheel and welder. Also will 5 psi blow the stock compression 1.8?
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Old 11-22-2007, 11:03 AM   #2
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... You'd also need a custom downpipe for that setup. Figure an easy $200 - $300 there as well. And custom oil lines. And custom intake pipes. And some custom hardware for the fuel system including a new pump.

Consider the Bell Engineering BEGI-S kit as an alternative: http://www.bellengineering.net/Pages...ems_BEGiS.html

It's $2100 for the complete kit. That's about the same price you'd pay for the Greddy (if not cheaper) after you factor in all the custom bits you'd need, but for that money you get the best manifold in the business, a good downpipe, a much higher-quality turbo (not bigger, just more efficient, water-cooled and with ball-bearings), a much higher-quality fuel regulator, all the little nuts and bolts, oil lines that actually fit your engine, pretty much everything about it is superior.

Your cheapest timing solution for an '01 is FM's adjustable timing wheel: http://flyinmiata.com/index.php?dept...umber=07-91000

A "better" solution would be a piggyback ignition controller, though sadly the more common ones like Bipes don't work on the NBs. (Forget the MSD box- it was a piece of **** when it was new, and that was 10 years ago. Also, it doesn't work on the NB either.) The cheapest decent-quality ignition piggyback I can think of for the NB is the Greddy eManage (blue).

edit: ... and no, 5 PSI will not blow up an '01 engine IF the fuel is properly taken care of.

Oh, and for perspective, all of this is coming from a Greddy owner. The Greddy kit isn't bad, it's just that the Bell kit is sooooo much better.

Last edited by Joe Perez; 11-22-2007 at 11:23 AM.
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Old 11-22-2007, 11:25 AM   #3
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i agree with joe about the new begi S kit. controlling fuel and timing on the 01 is going to be the hardest part. you can't use a rising rate FPR because it's not a returnless system.

I wouldn't worry about tuning much with 5 psi. above that I would seriously worry about tuning. the compression ratio of the 01 is 10:1. higher than the so-called weak rod 99-00.
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Old 11-22-2007, 11:34 AM   #4
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Originally Posted by y8s View Post
controlling fuel and timing on the 01 is going to be the hardest part. you can't use a rising rate FPR because it's a returnless system.
Actually, Ben pointed out over on M.net (somewhat to my embarrassment) that it can be done. You install an inline booster pump and then mount the regulator back at the tank!

http://home.alltel.net/mcfly/images/...urnlessFMU.jpg
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Old 11-22-2007, 01:44 PM   #5
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All I want is 5 psi max. that's it. So if I buy the BegiS kit, it will cost me another grand or more to mess with fuel and timing? What if I didn't touch the timing? I'm not goin to roadrace or run it hard for more than a few minutes or so when I'm out driving. I'm trying to get by with as little money spent as possible. I mostly just don't want to get beat at a stoplight by stupid cars such as grand am gt's, cavalier Z24's, Kia optimas and all other gay cars like that. You see what I'm saying it's not like I'm lookin to run 13's. Is there any way I could turn the BegiS kit down to like 3 psi to start off with and turn it up later after getting more supporting mods. I just want as basic a turbo kit as I can get away with. I was lookin at zex 55 wet shot and the greddy kit caught my eye as it was only $600 more and it's a TURBO! (cooler to have under the hood and the power is always there) I just want a basic as basic can be kit and not blow up my motor. Dammit I don't know now there's no way I'm gonna save up 4-5 grand just to have 200 horsepower and run 14's. Why the hell didn't Mazda just engineer a decent engine for the car? It's an awesome car it deserves an awesome motor.
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Old 11-22-2007, 02:11 PM   #6
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All I want is 5 psi max. that's it. So if I buy the BegiS kit, it will cost me another grand or more to mess with fuel and timing?
No. The Bell kit is fairly complete. The fuel system (pump and regulator) is provided for you in the $2100 price. All you need to add is gasoline.

It does not include a dynamic ignition control, however with an '01 at only 5 PSI, you actually don't need one. Your car has a factory knock sensor. If you found that you did still have some chronic knock, you could use the $32 wheel from FM to dial it back a few degrees. (For all I know, Bell may be including one. I haven't researched the specifics of the NB kits.)

Dynamic ignition control is only really necessary when you start running much higher levels of boost. Lots of us around here running 12 - 15 PSI, so for that it's a necessity. Actually, none of the base-level kits on the market include dynamic ignition control- they just tell you to dial it back 4 degrees and that's generally enough.

Quote:
Is there any way I could turn the BegiS kit down to like 3 psi to start off with and turn it up later after getting more supporting mods.
You don't need to. It is complete and will run at 5PSI out of the box.

Quote:
I just want a basic as basic can be kit and not blow up my motor. Dammit I don't know now there's no way I'm gonna save up 4-5 grand just to have 200 horsepower and run 14's.
You don't need to. The cool thing about the Bell kit is that the parts they supply (manifold, turbo, DP, etc) are capable of supporting much higher power levels. So you can start with the basic $2100 kit and run it at 5PSI. Then later on, as money and time become available and the boost addiction grows, you can add an intercooler, ignition control, and a MBC and run 8 or 10 PSI without having to remove / replace any of the original kit.

Quote:
Why the hell didn't Mazda just engineer a decent engine for the car?
They did, but then in '94 they replaced it with a 1.8
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Old 11-22-2007, 02:50 PM   #7
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Well I guess I will just get the BegiS kit and add a bypass valve and a small intercooler later. I added everything up and it will be slighly cheaper than the greddy by the time I buy all the extra parts needed. I'm just saying 1.6 and 1.8 and the new 2.0 do not impress me at all. Honda 1.8 Variable valve=190hp+...Mazda 1.8 variable valve=150hp? wtf? and the Miata is so much better than any honda and deserves at least as good an engine. My buddy hasa '98 GSR with b18, intake and exhaust. Car weighs atleast 2700 pounds or more and I'll need a turbo to just hang with him. It just sucks. I need a turbo with 5 psi for 190 hp. he can get 5 psi and have probably 250. dammit. mazda motors are poo. That must be why they used a wankel for their flagship car instead of one of their 4 cyl motors. The only 4 cyl that really impresses me is the 4g63, 2 liters holds 19.5 psi and has more torque than hp(287). If the miata had that, it would be a low 12 second car. It would be a freakin beast. Well I take that back the mazdaspeed 3 is a powerful, torquey, impressive motor. hell if they put that 260hp beast in a miata no other car for under 40grand would beat it. Oh well I figure if I can get it to run like a mazdaspeed miata, I'll be happy with it.
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