Another Injector question...which 550s? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 08-31-2006, 05:07 PM   #1
Junior Member
Thread Starter
iTrader: (3)
 
Join Date: Aug 2006
Posts: 53
Total Cats: 0
Post Another Injector question...which 550s?

Ok, bear with me guys, I'm new to this forum and to turbo-ing the Miata. I have a '94, all stock right now. I'm starting to gather parts for my turbo upgrade.

Here is my general plan of items to use (note, subject to change at anytime )

Rebuild the bottom end to oem.
'99 Head (along w/ Intake & fuel rail)
GT2560R
Begi Manifold
Begi DP
EVO FMIC
Megasquirt N' Spark

My question is, since I will be switching over to a '99 fuel rail, which injectors fit these? Do the RX7 550cc still fit? I plan on running RX7 injectors, but I am not quite sure which high Imp RX7 550s fit. Will the primaries off an FD fit too? Do the plugs still fit the 550s?

Any help is greatly appreciated. I am sure you haven't heard the last of me as I build this thing.

-Jason
jcocke is offline   Reply With Quote
Old 08-31-2006, 06:04 PM   #2
Guest
 
Join Date: Mar 2006
Posts: 57
Total Cats: 0
Default

The RX7 injectors will work with the 99 rail.
lukydvll is offline   Reply With Quote
Old 08-31-2006, 09:32 PM   #3
Senior Member
iTrader: (1)
 
Join Date: Dec 2005
Location: irvine, ca
Posts: 729
Total Cats: 0
Default

make sure you get the right ones. high imp 550cc rx-7 injectors look like this:
Attached Thumbnails
Another Injector question...which 550s?-550_inj_1.jpg   Another Injector question...which 550s?-550_inj_2.jpg   Another Injector question...which 550s?-550_inj_3.jpg  
kung fu jesus is offline   Reply With Quote
Old 08-31-2006, 10:05 PM   #4
Junior Member
Thread Starter
iTrader: (3)
 
Join Date: Aug 2006
Posts: 53
Total Cats: 0
Default

Thanks for the info guys. They don't look like that, it turns out the ones I was looking at are side feed. I'll keep searching.
jcocke is offline   Reply With Quote
Old 08-31-2006, 10:24 PM   #5
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

360cc 195500-2130 Black
545cc 195500-2020 Red
460cc 195500-2010 Red

all PNP
Braineack is offline   Reply With Quote
Old 08-31-2006, 10:38 PM   #6
Senior Member
iTrader: (1)
 
Join Date: Dec 2005
Location: irvine, ca
Posts: 729
Total Cats: 0
Default

small correction, they're more purple than red. i tried to get the color as close as i could in the photo correction.
kung fu jesus is offline   Reply With Quote
Old 08-31-2006, 10:54 PM   #7
Elite Member
iTrader: (14)
 
Join Date: Mar 2006
Location: Edmonton, AB
Posts: 4,921
Total Cats: 0
Default

What were the 360cc injectors out of?
jayc72 is offline   Reply With Quote
Old 08-31-2006, 11:07 PM   #8
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

Quote:
Originally Posted by jayc72 View Post
What were the 360cc injectors out of?
actually they are Mazda 323 1.8 GTX Injectors
Braineack is offline   Reply With Quote
Old 09-01-2006, 09:25 AM   #9
Junior Member
Thread Starter
iTrader: (3)
 
Join Date: Aug 2006
Posts: 53
Total Cats: 0
Default

Thanks for the help...I had a buddy place a WTB ad on the rx7club forum to try to dig some up. Whats a decent price, 100 bucks a set (4)?
jcocke is offline   Reply With Quote
Old 09-01-2006, 07:18 PM   #10
Senior Member
iTrader: (1)
 
Join Date: Dec 2005
Location: irvine, ca
Posts: 729
Total Cats: 0
Default

i bought mine there for $200, but they had been to marren for balancing and blue printing and hadn't been used yet. $100 is good.
kung fu jesus is offline   Reply With Quote
Old 09-03-2006, 01:12 PM   #11
Senior Member
iTrader: (1)
 
Join Date: Aug 2006
Location: Illinois
Posts: 1,011
Total Cats: 7
Default

Forgive me if this is a stupid question, but how do you "banance" and "blueprint" an injector? Do you mean cleaned and flow calibrated? heh That's a question I never understood about engine rebuilds either was the "blueprint" part. What exactly does "blueprinting" an engine mean? Isn't a blueprint made for something before it's raw machined?

-LAZ
lazzer408 is offline   Reply With Quote
Old 09-03-2006, 11:07 PM   #12
Junior Member
Thread Starter
iTrader: (3)
 
Join Date: Aug 2006
Posts: 53
Total Cats: 0
Default

Usually blueprinting is the "going the exta mile to perfect the parts". Blueprinting an injector means that it's been flow tested before and after cleaning, and hopefully matched to the other injectors within 2% so that they are all flowing around the same cfm. Blueprinting an engine means that the builder has taken all the necessary steps to use parts that fit together perfectly, usually to the max of the manufacturers tolerances. This includes pistons, rods, and a crank that all fit together perfectly, utilizing optimum bearing clearances and bore sizing.
jcocke is offline   Reply With Quote
Old 09-04-2006, 01:01 AM   #13
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

Finding the 550' with oval connectors is ending up being like finding a needle in a haystack. Is it hard to modify the injectors with square connectors so that the oval clips can slip on them. Id rather modify the injectors than the harness.
neogenesis2004 is offline   Reply With Quote
Old 09-04-2006, 01:19 AM   #14
Senior Member
iTrader: (1)
 
Join Date: Dec 2005
Location: irvine, ca
Posts: 729
Total Cats: 0
Default

b&b injectors also means removing and replacing the screen filter in each one, the pintle covers, etc.

for non-p&p 550cc you need to buy the correct harness plugs. usually not too hard to find, easy to splice in too.
kung fu jesus is offline   Reply With Quote
Old 09-04-2006, 03:06 AM   #15
Senior Member
iTrader: (1)
 
Join Date: Aug 2006
Location: Illinois
Posts: 1,011
Total Cats: 7
Default

The square ones are low impedance arn't they? Or was that just the RX-7 ones?
I always wondered what people mean when there engine was blueprinted. I'd look under there hood and just see a GM engine or something and tell them they didn't design ****. GM built it. lol I guess it's another one of those "adopted word meanings". They also hate it when they tell me they "Built a '69 Chevelle" and I'd say "GM built a '69 Chevelle, you just assembeled it." :P Ah but I'm just a smartass like that.
Anyone have headrest speaker-cups they wanna sell?

-LAZ
lazzer408 is offline   Reply With Quote
Old 09-05-2006, 12:25 PM   #16
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Delicious and Moist.
Posts: 26,323
Total Cats: 1,920
Default

Quote:
Originally Posted by lazzer408 View Post
The square ones are low impedance arn't they? Or was that just the RX-7 ones?
There's no real correlation between impedance and connector style. Both ovals and squares are avaliable in high and low impedance versions- just gotta go by year & make.

FWIW, I'm running Bosch 42lb (440cc) injectors which are marketed as Ford Racing parts. They have the square tops, so I removed the harness and re-built it. That was actually the easy part. The hard bit was the collar of the injector where it mates with the fuel rail. The design is somewhat different from stock, such that I had to trim away a fair bit of plastic with a dremel, then hope & pray the first time I test-ran the fuel pump that gasoline wouldn't spray everywhere.

I wish I'd taken pictures, but I left my camera at work that weekend...
Joe Perez is offline   Reply With Quote
Old 09-05-2006, 04:27 PM   #17
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

Braineack is offline   Reply With Quote
Old 09-05-2006, 07:23 PM   #18
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Delicious and Moist.
Posts: 26,323
Total Cats: 1,920
Default

Dammit, why couldn't I have thought of that a month ago when I couldn't find RX7 injectors anywhere and wound up with these Bosch ones that I had to hack?

Somebody buy those quick! Send 'em to Five-0 for cleaning and you've got a helluva a deal!
Joe Perez is offline   Reply With Quote
Old 09-05-2006, 07:59 PM   #19
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

Still look like square injectors, but that's a steal on 460cc injectors. Even if they are different clips or ohms, wiring in clips and resistors isnt hard or expensive.
Braineack is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 58 12-13-2017 10:04 PM
Changing from 460cc to flow force 610cc in diypnp 90 Turbo MEGAsquirt 19 10-19-2015 04:23 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 04:47 AM.