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Old 12-10-2010, 07:13 PM   #1
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Default New to Miata's need help on turbo setup

Hey Guys I just picked up a 1990 Miata with 82,000 miles last week and I'm wanting to give it a little more pep.

My goals are a 5-6 psi turbo setup to make the car a little more fun. I have a 03.5 Mazdaspeed protege as my daily so I am not new to Turbo's.

I have a wideband in My protege that I can put in the miata for tuning purposes. For now I do not want to get into using piggyback's of any sort, most likely in the future.

I have a Freshly rebuilt Td05 14b turbo that I plan to use with my miata.

My question is what would I need to do a 5-6 psi setup as a bare minimum start for fuel management and timing control? Cost needs to be a bare minimum, I plan on purchasing as many used items as I can. If possible I would like to utilize the stock fuel pump for now. I can most likely find bigger injectors out of a local pull it yard, what are common ones to use? Thanks for any help guys.
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Old 12-10-2010, 07:19 PM   #2
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Quote:
Originally Posted by duffbuster243 View Post
what would I need to do a 5-6 psi setup as a bare minimum start for fuel management and timing control?
Bare minimum? A rising-rate fuel pressure regulator and just dial back the cam angle sensor (CAS) to retard the base timing by 4.


Quote:
If possible I would like to utilize the stock fuel pump for now.
The stock fuel pump, assuming it's in good shape, should be adequate for 200 HP assuming you get there with a combination of aftermarket ECU and larger injectors. With a RRFPR, maybe 160-170 HP.

Change the fuel filter at the very least. Cheap insurance, and I'll bet you a dollar that the one in the car presently has 20 years and 82,000 miles on it.


Quote:
I can most likely find bigger injectors out of a local pull it yard, what are common ones to use?
https://www.miataturbo.net/diy-turbo-discussion-14/diy-faq-all-your-answers-one-big-post-4288/
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Old 12-10-2010, 11:43 PM   #3
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Originally Posted by Joe Perez View Post
Bare minimum? A rising-rate fuel pressure regulator and just dial back the cam angle sensor (CAS) to retard the base timing by 4.


The stock fuel pump, assuming it's in good shape, should be adequate for 200 HP assuming you get there with a combination of aftermarket ECU and larger injectors. With a RRFPR, maybe 160-170 HP.

Change the fuel filter at the very least. Cheap insurance, and I'll bet you a dollar that the one in the car presently has 20 years and 82,000 miles on it.


https://www.miataturbo.net/showthread.php?t=4288


Ok, I have reviewed the Guide you posted and have a few questions. What would be a good size injector to bump up to that the stock ecu will run the car well on? Also, with bigger injectors would I turn the stock fuel pressure down below the stock 43.5 psi to help keep the mixture good during idle/cruise conditions? I have a aftermarket fuel pressure regulator that I can fit on the car to do so.
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Old 12-16-2010, 03:29 PM   #4
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Use this to see what injector size you want

http://www.rceng.com/technical.aspx?...Kjmiswprq3f4Kc

Then you can also use that to see what fuel pressure you want to run, the higher the pressure, essentially you make your injectors "bigger"
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