Jump to content
SAU Community

Recommended Posts

approx how many rwkw before 550cc rx7 injectors will max out?

also is there a way to use top feed injectors in a rb25 runners? i had a rb20 but im converting to rb30det with 25 head, if there is a way to fit em and they will cope with power then il use em. if not get bigger

Link to comment
https://www.sau.com.au/forums/topic/171383-550cc-injectors-max-power/
Share on other sites

approx how many rwkw before 550cc rx7 injectors will max out?

also is there a way to use top feed injectors in a rb25 runners? i had a rb20 but im converting to rb30det with 25 head, if there is a way to fit em and they will cope with power then il use em. if not get bigger

A standard rule-of-thumb for a 6-banger seems to be 1 engine hp per cc of injector - thus, 550hp for a 6-cyl motor with these injectors with standard rail pressures.

Regards,

SW

You could try fitting an r34 neo inlet manifold, as they are the same bolt pattern as the rb25, and have 11mm top feed injectors. Maybe just the r34 rail will fit? 550cc injectors are good for 350rwkw at standard rail pressure, or up to 400rwkw or so with a FPR

approx how many rwkw before 550cc rx7 injectors will max out?

also is there a way to use top feed injectors in a rb25 runners? i had a rb20 but im converting to rb30det with 25 head, if there is a way to fit em and they will cope with power then il use em. if not get bigger

PM if you want to sell them :cool:

A standard rule-of-thumb for a 6-banger seems to be 1 engine hp per cc of injector - thus, 550hp for a 6-cyl motor with these injectors with standard rail pressures.

Regards,

SW

I think it's a good approx rule of thumb but that calculates engine HP.

eg. standard 370's, 370HP = 275kws, now subtract about 50kws for drivetrainloss etc = 225rwkws

..which is about the most i would expect to see out of these little ones. Heaps of peeps get just over 200 before upgrading, so the 'rule' is close

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Hi Apex and welcome! 
    • Probably too late to reply to this, but worth a try. It's not calliper flex, the calliper as a whole is moving so it has to be calliper mounting bracket flex.  Calliper mounting brackets are designed to stop the calliper rotating, they don't need to be designed heavy duty to stop the calliper moving in and out.  Whatever it is is not the major cause of poor pedal feel, the outer pistons are moving towards the disc rotor the same amount as the inner pistons are moving away from the disc rotor.  Hence no change in fluid usage, what extra fluid is needed to move the outer pistons is recovered from the inner pistons. For a calliper to move as a whole by far the most common reason is the rotor is not perfectly centred in the calliper.  The first thing I check is that hub face is perfectly clean, bare metal, where the rotor hats contacts it.  Then I check the that rotor is firmly held in place by at least 3 wheel nuts (or equivalent). If all of the above are confirmed to be in perfect alignment then I would check the piston sizes and ensure that the 3 inner pistons and 3 outer pistons have matching diameters (eg; 28/32/36mm).  I have seen a no name 4 spot calliper that had 1 of the 4 pistons a different diameter. Maybe I missed it, are both the callipers exhibiting the same problem? I would remove the transfer pipe and inspect it to make sure that there are no restrictions. Maybe you already have but if not I would return them with the video and have them confirm all of the above.   Hope that helps Cheers Gary    
    • If you have the original log book and it didn't have a chassis number quoted, then no money required.  I have "rechassied" a number of race cars, no problem as long as you have the original log book.   Cheers Gary
    • Well the good news is that it won't run any worse with an atmo bov than it does with no bov, I've owned a few Nissans over the years (r32, s15 and now r33), the stalling issue caused by a bov or no bov while still having an afm is easy enough to live with, most people get used to driving them and just feathering the throttle when you come to a stop to avoid it stalling. Changing to a proper ecu with a map sensor is ideal but in the short term I'd just slap in the bov if you really want the whoosh sound. I looked into the pass through type maf like the R35 one above but decided against it as the amount of oil and crap flowing through the hot side would mean you'd have to clean it often to keep it working.
×
×
  • Create New...