DIY Turbo Discussion greddy on a 1.8? homebrew kit?
Sponsored by:
Sponsored by:

Injector Size

Old 05-12-2008, 03:40 AM
Junior Member
Thread Starter
Join Date: Sep 2007
Location: Brisbane, Australia
Posts: 109
Total Cats: 0
Default Injector Size

I am piecing together bits for my setup and want some opinions on injector size. I have a na6 with MSPNP, will be using a fairly small t25 from a R34 GTR, and am hoping to make in the low 200rwhp bracket with around 12psi.

I already have a set of rx7 440s(199500-2010) which I have had cleaned and tested but not yet installed. I origionally went the 440s as I wanted to retain better resolution down low.

I have done the calcs and it looks like they should be around the right size for my expectations but I wanted to hear from some of you about it, as I don't know how accurately the figures apply in real life.

I do also have cams and am seeing over 90% dc out of the stock 230s N/A so this has me thinking maybe I should go for some 550s from the beginning to leave some headroom? Opinions?

Cheers, Tim
zoomzoom is offline  
Old 05-12-2008, 03:52 AM
Senior Member
iTrader: (8)
turbobluemiata's Avatar
Join Date: Aug 2006
Location: Springfield, IL
Posts: 1,012
Total Cats: 0

headroom never hurts but cheaper to use what you got if you already have 440's cleaned throw em in I think
turbobluemiata is offline  
Old 05-14-2008, 09:12 AM
Junior Member
Thread Starter
Join Date: Sep 2007
Location: Brisbane, Australia
Posts: 109
Total Cats: 0

Anyone else using the rx7 440s? Any more opinions to share?
zoomzoom is offline  
Old 05-14-2008, 10:08 AM
Boost Pope
iTrader: (8)
Joe Perez's Avatar
Join Date: Sep 2005
Location: Chicago. (The non-murder part.)
Posts: 29,316
Total Cats: 2,917

I'm using a set of Bosch 465s, virtually the same as your 440s. I don't have a HP number, but on my intercooled, Greddy-based system (TD04H-15G turbo) running typically 12-13 PSI, the highest I've ever seen them go is ~80%. IOW, they seem to be ideally suited for this particular application.
Joe Perez is online now  
Related Topics
Thread Starter
Last Post
Build Threads
03-16-2019 08:07 PM
Miata parts for sale/trade
09-30-2018 01:09 PM
90 Turbo
10-19-2015 03:23 PM
10-01-2015 12:15 PM
The Gleas
10-01-2015 09:30 AM

Thread Tools
Search this Thread
Quick Reply: Injector Size

Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.