New to this forum but not to Miatas or turbos
#1
New to this forum but not to Miatas or turbos
I have been looking around on this forum for a while and found some pretty useful info. I'm ready to get involved.
I am a former Garrett turbo engineer with lots of previous experience with Miatas and turbos. My wife and I have been hot lapping our 99 Miata with NASA for 5 or 6 years now and have had a blast. Miatas are great track cars right out of the box the way Mazda created them. But, after five years with R-compound tires and some racing beat sway bars on a completely stock drive train, we are ready for some more power. Time for a turbo. I am hoping to gather the wisdom of this forum to find out what works best. Hope you guys (and gals) can help.
By the way, I don't just plan to poach info without contributing. I engineered and built a complete custom turbo system for my FD Rx-7 so I have a wealth of experience to bring to the table. Let me know if I can help anyone out.
Thanks,
Dan
I am a former Garrett turbo engineer with lots of previous experience with Miatas and turbos. My wife and I have been hot lapping our 99 Miata with NASA for 5 or 6 years now and have had a blast. Miatas are great track cars right out of the box the way Mazda created them. But, after five years with R-compound tires and some racing beat sway bars on a completely stock drive train, we are ready for some more power. Time for a turbo. I am hoping to gather the wisdom of this forum to find out what works best. Hope you guys (and gals) can help.
By the way, I don't just plan to poach info without contributing. I engineered and built a complete custom turbo system for my FD Rx-7 so I have a wealth of experience to bring to the table. Let me know if I can help anyone out.
Thanks,
Dan
#3
Elite Member
iTrader: (22)
Joined: Dec 2006
Posts: 3,224
Total Cats: 3
From: Sunny Spanish speaking Non US Caribbean
I have been looking around on this forum for a while and found some pretty useful info. I'm ready to get involved.
I am a former Garrett turbo engineer with lots of previous experience with Miatas and turbos. My wife and I have been hot lapping our 99 Miata with NASA for 5 or 6 years now and have had a blast. Miatas are great track cars right out of the box the way Mazda created them. But, after five years with R-compound tires and some racing beat sway bars on a completely stock drive train, we are ready for some more power. Time for a turbo. I am hoping to gather the wisdom of this forum to find out what works best. Hope you guys (and gals) can help.
By the way, I don't just plan to poach info without contributing. I engineered and built a complete custom turbo system for my FD Rx-7 so I have a wealth of experience to bring to the table. Let me know if I can help anyone out.
Thanks,
Dan
I am a former Garrett turbo engineer with lots of previous experience with Miatas and turbos. My wife and I have been hot lapping our 99 Miata with NASA for 5 or 6 years now and have had a blast. Miatas are great track cars right out of the box the way Mazda created them. But, after five years with R-compound tires and some racing beat sway bars on a completely stock drive train, we are ready for some more power. Time for a turbo. I am hoping to gather the wisdom of this forum to find out what works best. Hope you guys (and gals) can help.
By the way, I don't just plan to poach info without contributing. I engineered and built a complete custom turbo system for my FD Rx-7 so I have a wealth of experience to bring to the table. Let me know if I can help anyone out.
Thanks,
Dan
WOW!
This Board keeps getting better and better!
Now, if you'd be so kind to post your location below your avatar and post some pics of your car.... or ban!
#11
I took it the hint was that the maps aren't set in stone as it's hard to repeat and get the same numbers. Gives you a limited idea about the turbine I'd suppose.
Oh have I got a good question for a turbo smart person- Does a little bit of "flutter" hurt anything? My GT3271 will flutter at low boost before the BOV opens. Does that matter?
Oh yeah, NEWB, read the faqs and stickies before you start asking about ebay turbo kits and how many boost you can run.
Oh have I got a good question for a turbo smart person- Does a little bit of "flutter" hurt anything? My GT3271 will flutter at low boost before the BOV opens. Does that matter?
Oh yeah, NEWB, read the faqs and stickies before you start asking about ebay turbo kits and how many boost you can run.
#13
Oh have I got a good question for a turbo smart person- Does a little bit of "flutter" hurt anything? My GT3271 will flutter at low boost before the BOV opens. Does that matter?
Oh yeah, NEWB, read the faqs and stickies before you start asking about ebay turbo kits and how many boost you can run.
Oh yeah, NEWB, read the faqs and stickies before you start asking about ebay turbo kits and how many boost you can run.
Or ask questions like "how much boost can my built motor take" without telling us what turbo you plan to use.
Excelllent question Pat, mine does the exact same thing sometimes.
Welcome aboard DR, +1 on pics of the FD.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
#14
Thanks for the warm welcome (except JayKav).
Rafa, I'll get my details info updated tonight - please don't ban me until I get a chance to do something really annoying.
JC, unfortunately, I have to agree with JKav's answer to your question. The turbine maps they post on the Garrett site are not of much use. The are a rough curve fit through the peaks of the speedlines. Peak efficiencies and flows do give some point of comparison but what really matters is properly matching the turbine to the compressor. Without going through that exercise, you don't know where the turbine will really operate. The maps on the site only provide "best case" operating conditions.
For those who are interested, I will post pics of our Miata and my FD very soon.
Rafa, I'll get my details info updated tonight - please don't ban me until I get a chance to do something really annoying.
JC, unfortunately, I have to agree with JKav's answer to your question. The turbine maps they post on the Garrett site are not of much use. The are a rough curve fit through the peaks of the speedlines. Peak efficiencies and flows do give some point of comparison but what really matters is properly matching the turbine to the compressor. Without going through that exercise, you don't know where the turbine will really operate. The maps on the site only provide "best case" operating conditions.
For those who are interested, I will post pics of our Miata and my FD very soon.
#17
I took it the hint was that the maps aren't set in stone as it's hard to repeat and get the same numbers. Gives you a limited idea about the turbine I'd suppose.
Oh have I got a good question for a turbo smart person- Does a little bit of "flutter" hurt anything? My GT3271 will flutter at low boost before the BOV opens. Does that matter?
Oh yeah, NEWB, read the faqs and stickies before you start asking about ebay turbo kits and how many boost you can run.
Oh have I got a good question for a turbo smart person- Does a little bit of "flutter" hurt anything? My GT3271 will flutter at low boost before the BOV opens. Does that matter?
Oh yeah, NEWB, read the faqs and stickies before you start asking about ebay turbo kits and how many boost you can run.
#18
Thanks for the explanation. As for oil restrictors... I'm running a .070" restrictor on my GT3271. I don't have a "real" oil pressure gauge, but I'd imagine it's around 60 or so at cruise and 90ish by redline. If these numbers were correct, would a restrictor be warranted? Or even better: Would a restritor hurt anything? I've seen a lot of people run a restrictor on journal bearing turbo that had premature oil seal problems in the past that they contributed it to not using a restrictor.
#20
Dr. Turbo! With a name like that you can expect to get a few tech questions! I'm really looking forward to you future posts.
Welcome!
I wonder- has anyone with the Doctor's background ever evaluated one of those China chargers I keep hearing about? I mean, really took one part and evaluated the tollerances, metalurgy, design of the vanes etc. and compared it to the Garrett?
It would be pretty neat to have a (turbocharger) engineer's perspective.
Dr. Would you be willing?
Welcome!
I wonder- has anyone with the Doctor's background ever evaluated one of those China chargers I keep hearing about? I mean, really took one part and evaluated the tollerances, metalurgy, design of the vanes etc. and compared it to the Garrett?
It would be pretty neat to have a (turbocharger) engineer's perspective.
Dr. Would you be willing?