old ass supra greentop injectors. - Miata Turbo Forum - Boost cars, acquire cats.

Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

old ass supra greentop injectors.

Old 03-06-2011, 08:57 PM
  #1  
Elite Member
Thread Starter
 
Join Date: Mar 2010
Location: Detroit
Posts: 1,510
Total Cats: 29
Default old *** supra greentop injectors.

How much power can these things safely support with my mods (in sig).

I'll be running 60 psi of pressure. Injector calculator says that at 60 psi they will flow 366cc.

Thanks!
flounder is offline  
Old 03-07-2011, 01:25 PM
  #2  
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago. (The non-murder part.)
Posts: 28,081
Total Cats: 2,497
Default

The RC Engineering calculator thinks that at .6 BSFC and 80% DC, they will support about 175HP at the crank.
Joe Perez is offline  
Old 03-07-2011, 08:38 PM
  #3  
Elite Member
Thread Starter
 
Join Date: Mar 2010
Location: Detroit
Posts: 1,510
Total Cats: 29
Default

Hi Joe, thanks for the reply.

Before I installed these, I was on the stock red ones ([email protected]) I basically maxed them out on the emb seeing 99%dc at 7 psi with an a/f ratio of 12.5-1. I know, stupid right?

According to the calculator this would have gotten me very close to 195bhp.

When I tried out the greentops on the calculator with a dc of 90% and my bsfc set to 0.55 (from braineack's sticky this is supposed to be the most accurate for the miata) I came up with 225-230bhp.

The next time I do a log, the fmic will be installed and I'll be aiming for afr's in the low to mid 11's. I am hoping to see 8-10 psi.
flounder is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
albertogti117
Miata parts for sale/trade
6
10-08-2015 10:09 AM
ericwh
Miata parts for sale/trade
3
09-24-2015 08:47 AM
300zxrb26dett
Miata parts for sale/trade
0
09-22-2015 01:43 AM
huesmann
MEGAsquirt
19
09-16-2015 08:11 PM
tottestad
Miata parts for sale/trade
18
09-14-2015 08:52 PM


Thread Tools
Search this Thread
Quick Reply: old ass supra greentop injectors.


Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 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 Amazon.com and affiliated sites.