New Here! Want to turbo my 90.
#1
New Here! Want to turbo my 90.
Hey,
I am new here and to Miatas. I recently bought a 90 model. It has Tein springs, adjustable KYB shocks, chassis has been seam welded, weld in 4 point roll bar, OPM bushing kit, OPM strut bar, header, exhaust, HKS intake, some other things.
I have been researching and know 90's (some) have short nose cranks, mine does. Now I have been also looking at Greddy kits and like the price and sound of them.
I have some questions. Can a short nose crank motor handle a turbo?
I want to track day this car, mountain runs, autocross, etc. How reliable will it be? Can it safely go to 7k rpm?
What is needed for tuning for a basic Greddy kit? Anything? I want to be as basic as I can, with a small amount of boost and gains, I hear it adds 30hp in stock form? That is fine for me. I want a little extra power, and stay very reliable.
Any help greatly appreciated. Thanks!
Simon
I am new here and to Miatas. I recently bought a 90 model. It has Tein springs, adjustable KYB shocks, chassis has been seam welded, weld in 4 point roll bar, OPM bushing kit, OPM strut bar, header, exhaust, HKS intake, some other things.
I have been researching and know 90's (some) have short nose cranks, mine does. Now I have been also looking at Greddy kits and like the price and sound of them.
I have some questions. Can a short nose crank motor handle a turbo?
I want to track day this car, mountain runs, autocross, etc. How reliable will it be? Can it safely go to 7k rpm?
What is needed for tuning for a basic Greddy kit? Anything? I want to be as basic as I can, with a small amount of boost and gains, I hear it adds 30hp in stock form? That is fine for me. I want a little extra power, and stay very reliable.
Any help greatly appreciated. Thanks!
Simon
#3
The short-nose crank failure is not directly related to the amount of power produced. If you're worried, I'd search on M.net forums and their garage section about the Loctite fix. There are plenty of short-nose cars that've survived for a long time and improperly installed long-nose cranks that have died quickly.
Yes, the car can safely rev to ~7250 RPM fuel cut-off, though, as with any car, I wouldn't sit there at redline all day long. Frequent visits, though, aren't going to hurt it, and that's why Mazda chose that rev limit.
Yes, the Greddy kit will add ~30-40rwhp in stock form, the problem is, several parts of it are unreliable unless modified. Search on "relief cuts" for the manifold flange, upgrading to stainless, higher-grade hardware, solutions to the stock rubber and plastic crossover that will fail (you could build or buy a metal crossover replacement, but for that amount of effort and/or money, you might as well get an intercooler).
Also, unless you want it to feel dog-slow when running in vacuum, you'll want a timing retard device that allows you to run stock timing but pulls/retards when in boost/higher airflow.
Yes, the car can safely rev to ~7250 RPM fuel cut-off, though, as with any car, I wouldn't sit there at redline all day long. Frequent visits, though, aren't going to hurt it, and that's why Mazda chose that rev limit.
Yes, the Greddy kit will add ~30-40rwhp in stock form, the problem is, several parts of it are unreliable unless modified. Search on "relief cuts" for the manifold flange, upgrading to stainless, higher-grade hardware, solutions to the stock rubber and plastic crossover that will fail (you could build or buy a metal crossover replacement, but for that amount of effort and/or money, you might as well get an intercooler).
Also, unless you want it to feel dog-slow when running in vacuum, you'll want a timing retard device that allows you to run stock timing but pulls/retards when in boost/higher airflow.
#5
No it doesn't come with an intercooler.
A board member named Stripes sells the piping for an intercooler kit though. You buy your own IC, which he can suggest as well as your own couplers and T-bolts and bam you've got an IC. He used to sell the whole kit but now offers just the pipes so you can source your own parts cheap if you want to, like sub$100 ebay IC which will work just fine for what you want to do with your car.
Search for Stripes Intercooler.
A board member named Stripes sells the piping for an intercooler kit though. You buy your own IC, which he can suggest as well as your own couplers and T-bolts and bam you've got an IC. He used to sell the whole kit but now offers just the pipes so you can source your own parts cheap if you want to, like sub$100 ebay IC which will work just fine for what you want to do with your car.
Search for Stripes Intercooler.
#10
For what I do, a lot of power is not needed, and I need something reliable. I have friends with built DSM's and RB 240's and all with high HP numbers, and it is awesome, but I need something that will make me smile, and is reliable. I know sometime I will want more, but I will hopefully be using all the money I have with autocrosses, track days, etc.
Thanks for all the input!
Thanks for all the input!
#11
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Ahh, well you can safely get more hp out of a greddy setup. Very reliably so, its just going to cost a few more coin.
Dont say you dont want more hp because it wont be reliable, say you dont want more hp because you dont want to spend the money =P.
Dont say you dont want more hp because it wont be reliable, say you dont want more hp because you dont want to spend the money =P.
#20
Simon, I suspect you really need to drive a few different Miatas to get an idea of what you like. You may totally detest the lag of the Greddy turbo or you could love it...it could really go either way.
Or you may find that you love the JR M45 supercharger kit...or the Fuji Racing IRTB kit.
I think spending ~$1,500 on something you may not like is risky.
Or you may find that you love the JR M45 supercharger kit...or the Fuji Racing IRTB kit.
I think spending ~$1,500 on something you may not like is risky.