will the Greddy kit max out 460 injectors? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Prefabbed Turbo Kits A place to discuss prefabricated turbo kits on the market
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools
Old 01-12-2007, 01:55 PM   #1
I'm Miserable!
Thread Starter
iTrader: (5)
 
Join Date: Sep 2005
Location: SLC, Utah
Posts: 1,591
Total Cats: 0
Default will the Greddy kit max out 460 injectors?

I have a set of 460's, but have access to a set of 550's if needed. What would you guys go with if you had the Link? Also have the RM downpipe and huge FMIC.
zoom2zoom is offline   Reply With Quote
Old 01-12-2007, 02:14 PM   #2
Elite Member
iTrader: (14)
 
Join Date: Mar 2006
Location: Edmonton, AB
Posts: 4,921
Total Cats: 0
Default

FM used to supply 440cc injectors with all their 1.6 turbo/link setups. 460cc injectors should get you pretty close to the SAFE limits of the stock 1.6. Should be able to hit 240-250whp with that fueling and still have a little headroom.

This assumes at fuel pressure of 50psi, .55 BSFC and 80% duty cycle. And that the Miata loses 25hp to the drivetrain.
jayc72 is offline   Reply With Quote
Old 01-12-2007, 02:18 PM   #3
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,479
Total Cats: 248
Default

If I had a link, I'd use whatever was a saturated/high impediance injector so I wouldn't have to run a resistor pack.
TurboTim is offline   Reply With Quote
Old 01-12-2007, 02:23 PM   #4
Elite Member
iTrader: (14)
 
Join Date: Mar 2006
Location: Edmonton, AB
Posts: 4,921
Total Cats: 0
Default

I'm assuming that the 550 and 460 injectors he's talking about are from an RX7, they are plug and play.

I'll be using 460cc from an RX7 with my link
jayc72 is offline   Reply With Quote
Old 01-12-2007, 02:38 PM   #5
Senior Member
iTrader: (14)
 
brgracer's Avatar
 
Join Date: Nov 2004
Location: Ambler, PA
Posts: 1,275
Total Cats: 1
Default

Why not just go with the 550cc if you have access to them and have the extra headroom and run lower duty cycles?
brgracer is offline   Reply With Quote
Old 01-12-2007, 04:29 PM   #6
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,479
Total Cats: 248
Default

Idle quality issues? Dunno. I'd opt for the largest.
TurboTim is offline   Reply With Quote
Old 01-12-2007, 05:24 PM   #7
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

About how much HP would be possible with 550's for a 1.8 ?
cjernigan is offline   Reply With Quote
Old 01-12-2007, 06:05 PM   #8
Elite Member
iTrader: (14)
 
Join Date: Mar 2006
Location: Edmonton, AB
Posts: 4,921
Total Cats: 0
Default

Probably around 300whp. Not to say it will, but it will have enough fuel to get AROUND there. 4 550cc injectors on ANY Turbo motor would be good to this level.
jayc72 is offline   Reply With Quote
Old 01-12-2007, 06:44 PM   #9
Senior Member
 
Join Date: Dec 2004
Posts: 1,450
Total Cats: -1
Default

The turbocharger itself will run out of steam in the 265-285rwhp range.
bripab007 is offline   Reply With Quote
Old 01-12-2007, 06:54 PM   #10
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

Yeah I was never expecting to make anything like 300 HP with my current T25 setup.
cjernigan is offline   Reply With Quote
Old 01-12-2007, 08:13 PM   #11
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago (Over two miles from Wrigley Field. Fuck the Cubs. Fuck them in their smarmy goat-hole.)
Posts: 26,315
Total Cats: 1,913
Default

I'm running 440s on my setup. Haven't dynoed the car yet, but it's a Greddy manifold and turbo with a 2.5" downpipe and exhaust and a homebrew FMIC. At 13PSI, I've seen up to about 70% injector duty cycle, which tells me that assuming I don't miraculously find some added efficiency somewhere, this is just about the right size for this application. (this is on a stock fuel pump with no secondary FPR).

Larger injectors will of course work too, but as you increase the size of the injectors you are limiting the capability of the ECU to accurately control fuel flow at very small levels, such as idle.
Joe Perez 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 57 07-19-2017 05:11 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Changing from 460cc to flow force 610cc in diypnp 90 Turbo MEGAsquirt 19 10-19-2015 04:23 PM
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 01:24 PM.