Jump to content
SAU Community

Recommended Posts

-7s being a tad more responsive again (over -9) would be an excellent choice if response is your #1 goal.

FYI, here's stock vs -7 boost response (very few data points.....its rough) same engine and probably same cam timing.

med_gallery_15274_3730_6060.png

FYI, here's stock vs -7 boost response (very few data points.....its rough) same engine and probably same cam timing.

med_gallery_15274_3730_6060.png

I thought N1 turbos were different to -7 turbos?? The legend on your graph says N1 whereas your text says -7. I thought -7 were a lot more responsive then N1.

  • 3 weeks later...

Hey guys, great thread, some useful information in it.

i am slowly working on my car to achieve just this set up 300awkw

at the moment, i have just installed

GT2860-7 x 2 turbos

Tomei expreme dump pipes

already has a front pipe, and a hks preist cat back with a high flow 3" Catco cat. (looking at changing exhuast to one with a bit louder/better flow) any suggestions?? rear cannon style.

i have a vipec ecu (which i need to get retuned but going to wait till after mods) MAFless

it has pump incar already, so that is a non issue.

suspension is all done.

i am at the stage of buying injectors, i have been looking at seimens injectors, can anybody give me some info on which type to run if they know about seimens injectors? part numbers etc, im looking at about the 600cc mark for injectors

Also never really though about cam gears, but might also look into those b4 retune.

Cheers

Daz

ive got very similar mods to urs Daz.

im running 600cc nismo injectors with a sard intake fuel pump with a direct 14v power supply.

im also running GReddy cam gears, i think they are great on an RB26. they gave me more flexability when it came time for tuning. ie i had a choice between getting them tuned for outright power or sacrifice abit of top end for more midrange power/torque :)

ive got very similar mods to urs Daz.

im running 600cc nismo injectors with a sard intake fuel pump with a direct 14v power supply.

im also running GReddy cam gears, i think they are great on an RB26. they gave me more flexability when it came time for tuning. ie i had a choice between getting them tuned for outright power or sacrifice abit of top end for more midrange power/torque :)

Whats your max injector duty? What power is it making and what boost is that at?

+1 on cam gears

Not sure on injector duty, il have to find that out

296kw @ 19psi - cam gears adjusted for midrange, feels so responsive And just screams out of corners like a mofo :) I'm happy with it 100%

Duty couldn't be too high with 600s, im running 700s and only seeing max of 65% @ 350-360rwkw. Has a minor rail pressure bump so move it to 70-75%

600cc @ 300rwkw, rough stab would be 55-65%?

Had a good read of this thread before I started my round of mods for 300kw. My mods so far are

2860-9

Nismo 600cc

New PFC

HKS cam gears

Greddy dump/front pipe extension

Kakimoto Regu exhaust

Splitfire coil packs

Hasn't been tuned yet because of coilpack and EBC issues. But I'm hopeful I'll get close to cracking the 300 mark but at this stage I just want it tuned and running

Time and time again I see ppl try to estimate duty cycle in relation to power output but it seems like we are leaving out the most inportant fator which is afr.

A car with 600cc making 300rwkw tuned at 11.0afr will show higher duty cycle than if it was tuned to 12.0afr and making the same 300rwkw.

Can any one explain why my boost curve is fluctuating, at a glance i'd guess some sort of fuzzy logic function however im pretty sure the blitz spec r are theoretically just an open loop controller with simple duty cycle adjustment. The car is running the standard 8psi actuators on dash 7s and the blitz boost controller set to 86. When i eventually fit bigger dumps (i have stock 32), bigger afm and retune on e85, i'd like to run more boost. Is it worth while upgrading to 14psi actuators?

Cheers

Pat

l.jpg

Time and time again I see ppl try to estimate duty cycle in relation to power output but it seems like we are leaving out the most inportant fator which is afr.

A car with 600cc making 300rwkw tuned at 11.0afr will show higher duty cycle than if it was tuned to 12.0afr and making the same 300rwkw.

No different to estimating a dyno figure range or RPM turbos will come on.

There are always variables, however you can work out 'roughly' in most cases, hence its called an estimate...

Currently running -9s with 335kw, nismo 600cc injectors and fuel pump, with a max injector duty cycle of 86%

Just for reference

What air flow meters are using to get up to that figure? Are the standard still coping or have they been changed to Nismo or Z32?

My car is getting tuned in just under two weeks with -9s and 720cc injectors so i'm thinking the AFM's are going to be the next limiting factor.

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

    • Do not replace the power steering lines with this stuff. If it's anything like the Chase Bays stuff it will leak and be worse than stock. The reason why the reservoir is on the LH/passenger side of the car is because that's just where the reservoir was most convenient to fit. Don't overthink this stuff. The intake/cold side of the engine is pretty busy on these cars. And again, the hardpipe is designed to be a janky power steering cooler. In theory you can replace it with a real power steering cooler but that's really only for track use where boiling the fluid is a distinct possibility. Start with the low pressure lines feeding the pump from the reservoir. Make sure there isn't a bunch of junk in the reservoir filter. Be careful to not get ATF all over the engine bay. I hate dealing with ATF spills, you can clean it up and the slightest crevice will still release more oil that can still drip over time. You also want to inspect for leaks before you make a mess and can't tell what happened. Most likely you have a leak somewhere that is allowing fluid out and air in. Failing that it's allowing air in but not fluid out. Only place I can really see that happening is on the low pressure side because the pump will pull a slight vacuum to draw fluid in. Everything after the pump is high pressure or lower pressure, approaching atmospheric by the time it returns to the reservoir.
    • I did a skidpan night at SMSP this week, it was much cheaper than $350. But yeah, you need to slap an LSD in that thing.  I put an OS Giken in the 370Z and it's f**king MARVELOUS even compared to Nissan's viscous LSD. So you're saying it's free now that it's a housing estate? 😂
    • Nah, the car seems to run exactly as it did prior, in saying this it does "seem" to be better down low, like more eager to rev, but that may be 100% placebo effect from intake noise But, I'm not worried about it at all, in the end it is a fairly low compression NA engine that has a well shrouded intake,  if it is getting hotter IAT I cannot notice anything negative performance wise from the seat of my pants thrashing it about on the street or sitting in traffic, so meh, car now now makes induction noise so I'm happy
    • Do you have an IAT sensor? It's worth checking it to see. You may be suprised how little gap you actually need to flood your engine with hot air. (I tape up my airbox for a reason) :p
    • @KinkstaahKrinkle paint the "silver" alloy, not the red filter frame Engine bay heat won't be a issue worth worrying about as the silver alloy blocks it off on 3 sides, as for the top, the bonnet seals most of it and the big OEM CAI intake snorkel is still fitted in its original position  I will head into Clark's Rubber when I have some time to grab some pinch weld to tidy up the alloy after I paint it As for performance, I honestly wasn't expecting any, the only reason I got it is because the intake noise sounds cool to my old ears when I'm feeding it the beans Sometimes it's the silly things you do in in life that gives the most fun, and I do love anything that makes cool car noises In other news: I survived 4 nights at sea with Jackie not throwing me over board, holidays are continuing now as we are currently chilling at the Beachcomber in Toukley, after taking the coast roads from Sydney in the MX5, top down all the way, Toukley is where I spent a good deal of my youth holidaying during the summer months, there's lots of reminiscing going on,  and lots of beaches and old houses to visit Next on the list is to head to Batemans Bay for a few days, but we will take the Commodore out to stretch its legs, then Commodore hasn't really moved for months
×
×
  • Create New...