big churbo and a boost gauge
Thread Starter
Joined: Nov 2008
Posts: 7,257
Total Cats: 26
From: Spring, TX
Brand new in box LC-1 with DB gauge. I believe it's blue, but I ordered a while back and will verify. Comes with everything shown, and all that would normally come new in box, as well as both stainless and mild bungs.
Sold
T3/T4 300-400hp eBay turbo. Comes with fittings, bolts and lines shown.
$100 shipped


Sold
T3/T4 300-400hp eBay turbo. Comes with fittings, bolts and lines shown.
$100 shipped


Last edited by gospeed81; Jun 7, 2012 at 11:31 AM.
Thread Starter
Joined: Nov 2008
Posts: 7,257
Total Cats: 26
From: Spring, TX
replied.
Also, boost gauge for sale as well, willl post pics and details in a bit. Looking for $70 shipped, it's basically this, but in blue:
Package deals always available for a light discount.
Also, boost gauge for sale as well, willl post pics and details in a bit. Looking for $70 shipped, it's basically this, but in blue:
Package deals always available for a light discount.
If someone can definitively state that this churbo won't be a total dog on a stock motor-no forged anything- 220-ish WHP application I may be interested in it for the SAABata. Track car with limited street driving.
I planned on doing another SR20T25 which I feel would do a better job for me on my application, but I could be wrong. Someone speak up on this. Which would be the better choice? I haven't built the mani yet so T25 or T3 is irrelevant to me right now.
I planned on doing another SR20T25 which I feel would do a better job for me on my application, but I could be wrong. Someone speak up on this. Which would be the better choice? I haven't built the mani yet so T25 or T3 is irrelevant to me right now.
Thread Starter
Joined: Nov 2008
Posts: 7,257
Total Cats: 26
From: Spring, TX
I honestly think you'd be fighting the surge limit while building boost, might see some boost shortly after 3K rpms, max boost maybe a little before 4K, and be shifting at the point you're finally getting into the meat of the "efficiency island" (~70%).
Ideal? You tell me. To quote Corky Bell:
From what I get from your build I think you'd much prefer something that moves well without revving too much. Something magical about a properly-sized turbo on a 220whp Miata(motor). It's already passed that 18wheeler as soon as you've thought it, it's already 2 blocks down the road of that F250 driver who dumped a cloud of diesel smoke as soon as he saw you pull out.
I apologize that I've recently sold two turbos just outside of your ideal range, but you will be happier staying in that range.
Ideal? You tell me. To quote Corky Bell:
Originally Posted by Corky Bell
3. Selecting the Turbocharger
The size of the turbo selected for a given application will strongly influence the degree of success enjoyed by the system. It is not at all a case of only one size working in a specific situation; rather, there is just one that will work best.
The trade-offs of lag, boost threshold, heat, low-speed torque, and power are the variables in the decision process of matching the turbo to the requirements. To optimize the trade-offs, the requirements must be defined first.
The size of the turbo selected for a given application will strongly influence the degree of success enjoyed by the system. It is not at all a case of only one size working in a specific situation; rather, there is just one that will work best.
The trade-offs of lag, boost threshold, heat, low-speed torque, and power are the variables in the decision process of matching the turbo to the requirements. To optimize the trade-offs, the requirements must be defined first.
From what I get from your build I think you'd much prefer something that moves well without revving too much. Something magical about a properly-sized turbo on a 220whp Miata(motor). It's already passed that 18wheeler as soon as you've thought it, it's already 2 blocks down the road of that F250 driver who dumped a cloud of diesel smoke as soon as he saw you pull out.
I apologize that I've recently sold two turbos just outside of your ideal range, but you will be happier staying in that range.
If someone can definitively state that this churbo won't be a total dog on a stock motor-no forged anything- 220-ish WHP application I may be interested in it for the SAABata. Track car with limited street driving.
I planned on doing another SR20T25 which I feel would do a better job for me on my application, but I could be wrong. Someone speak up on this. Which would be the better choice? I haven't built the mani yet so T25 or T3 is irrelevant to me right now.
I planned on doing another SR20T25 which I feel would do a better job for me on my application, but I could be wrong. Someone speak up on this. Which would be the better choice? I haven't built the mani yet so T25 or T3 is irrelevant to me right now.
I can only say how it works on my car that sports a stock '96 motor with 220k miles on it. I enjoy daily driving it, towing things and such. I suggest running a 3" exhaust turbo to tip. The vids (link in my sig) are mostly at 12-13psi.
I know I'm the odd minority but I couldn't think of going any smaller. I hated the powerband on the last four tiny turbo cars I've owned.
Umm, I've never driven it. Well, it's gone 4 miles at 1/4 throttle total. I phale.
So, that really isn't a factor.
I did have a SR20T25 on my 99 and have two little turbos on my BMW 335i so I'm used to spool "right now". I'm probably going to stick with my T25 plan.
So, that really isn't a factor.I did have a SR20T25 on my 99 and have two little turbos on my BMW 335i so I'm used to spool "right now". I'm probably going to stick with my T25 plan.








