GReddy @ 15psi
 

Finally got the run files. Before the turbo and at 15psi. Enjoy! :bigtu:

I must say, I'm very impressed every time I read about your dyno run. Great job! You may have the fastest Greddy miata period.

Those are impressive numbers considering you aren't using a more capable ECU. You dyno plot goes against the common opinion that you can't get these kinds of power levels with an AFPR based system!

There is a dyno plot at FM's webpage of a greddy setup w/link doing over 260. In the description it says "It takes a little while for that turbo to spool..." Ironically it seems to get to peak tq as fast or faster than their 1.6 FM based setups.

Good job!

I dont get it..how is it possible to run those figures with emanage and 1.8 injectors.

Am I missing somthing here????

Lots of fuel pressure! And voodoo, don't forget the voodoo.

It's more than just 1.8 injectors and emanage. I also have a Begi AFPR and Pierburg inline fuel pump as well as an RX-7 AFM and olderguy's autotune. While I agree that "technically" the 1.8 injectors shouldn't be able to support those #, well...they do, and both the tailpipe sniffer and my pre-cat WB show that I am not running lean.

As I've posted in the past, many of the miata gurus (Keith from FM, Brant from BRP, markp, RodH) have said that the 99-00 1.8 injectors have lots of "headroom" for FI whatever that means. Maybe b/c they were designed around a returnless fuel rail that runs at 60psi they are more tolerant of higher pressures. Not sure.

Granted, they "technically" shouldn't work, but they do. That said, I have a spare set of 310cc injectors in my garage should my WB or other data ever show that I am running lean or too high fuel pressures. FWIW, olderguy also runs 1.8 injectors at 15psi and has not had fueling issues either.

Oh yeah, and I forgot....the special boost voodoo dance before I get on the dyno....haha

makes me wonder what a peiburg can do for me.

I love that damn fuel pump, LOVE IT!:)

What kinda fuel pressure are you seeing at 15psi? I used to run about 110psi or so on 270's ( I know I was rich like Bill Gates )....just wondering:)

I think he said he was around 100psi or so.

Right around 90-100psi last I checked.

I wondered what you were doing! I thought you had to pee. :dancegay:

wow, I need to lay off my fuel then. LOL. I think Im gonna run out to the car and put a restrictor in my AFPR.

I'm feeding my 305s 100psi of fuel at 9psi of boost. I'm recording 12:1 and slowly getting richer nearing redline.

330s at 100psi are good for about 275 BHP

Yeah, see I run about 110psi for 12psi on pumpgas. Its around 10.5:1 AFR's. I would prefer to be around 11.5 :1 but I run rich just to keep things safe. I was gonna add a resitrictor and try to get around 95-100psi and lean it out just a little to gain some free HP. Anyone use the wd-40 restrictor mod?

POP and a few others suggested it to me. But Corky was nice enough to send me one of his.

What injector duty cycles are you guys running?
I only had fuel for 13psi with 440's at a static 80 psi.

The highest that was logged by the Emanage was 91 just at the end of the run, but there was no additional injection at that time. The highest I can read in fuel pressure that logs is 97psi(so it could have gone over 100), but that only held for about 1/10th of a second.

I don't fully trust the Emanage logging 'cause it is only picking off in 1/10 seconds. The control factor is happening much more quickly.

My highest logged duty cycle was 92-93 very briefly as well toward the end. No additional injection at that point as well.

Also agree with the emanage logging as some numbers do not correlate with the LC-1 numbers that logs much faster.

You guys have to remember at those high pressures that the internal injector "needle" has to close against those pressures in 1 complete duty cycle. So even though your around a 85-90% duty cycle, the injector may still lag due to the increased pressure it sees when the needle is open. I can't see this being good for injectors over the long run.

So you are saying there could be up to say a 5% duty cycle variation do to pressure force caused lag that makes sense at that point bgr would be past 100% dc.

nice number...has to be a real good tune

wow, nice.

im so exicted to see his new numbers....just you wait!

hats off to you mate. That is extremely impressive. I am interested to see how it works out in the long run.

After all the hype and wait, I'll wager that when the time comes I'll probably end up making less power. Maybe I'll just up the boost to counteract? :gay:

I think it was a magical dyno....bought from the same guy who sold Jack his beanstalk beans....

they also said i couldn't run 440s on a emb. :rly: good job with those numbers sir. i'm hoping for similiar numbers.

slow.

lol jk

I should hope we could get more than that at 15 psi with good tuning. by 15psi i wanna hit closer to 300. We'll see as soon as i get my MS in. hopefully first i gotta fix that damn oil leak.

I don't think the TD04-15G can flow enough air to reach 300, I hope that it does, but I think it maxes out closer to 275 and that's running a really efficient setup with a good tune.

i meant a tdo5 16g in response to jahunis. yeah i agree a td04 is a nice turbo but it probably wont push more than 275 whp.

Where did you get the Pierburg fuel pump from? also, I'm guessing its alot easier than installing an in-tank fuel pump?

BEGi, actually no.

what injectoes and engine management where being used?

EMB, 1.8 injectors AFPR, O2 Clamp/Autotune and a high pressure fuel pump. I'm pretty sure his setup has been discussed at length.

In fact if you would have read the ENTIRE THREAD you would have seen the discussion about his setup. Please try harder next time.

8 days and you'll see a new plot ;)

what driveline mods other than clutches are people running with 250+ hp?

1.8 Torsen Diff or RX-7 diffs. Around 300-ish some are going to the 6-speed transmission.

man i really want around 275 with my greddy. anyone have megasqurt?

short bus to the MS forum
http://www.iconking.com/96x96/funny/shortbus.gif

well done

Great figures brg, looking forward to getting some of mine own!

can you tell me what kind of internal mods you have supporting that?

he ran that on a stock motor and it eventually blew up

..but to caveat akaryerye, didn't he blow it up @ 17 psi?

not to knock bubba, but @ 12 posts it's likely he doesn't realise how much boost a Miata engine can take with stock internals. Hell, I've had people ask me if I was going to get my engine "sleeved" before turning up the wick :gay:

it only blew up (bad rings) when he went to megasquirt and starting running more boost. he ran it in that configuration for a few years with various track days.

Wow, more boost than 15psi on that turbo?! That seems a bit crazy.

Yup, can handled 15psi for a little over a year including a few pretty strenuous track days.

Engine gave up the ghost at 18psi. I was NOT trying to run the engine at 18psi, but my crappy Autometer boost gauge was reading 10-12 psi so didn't realize I was at 18psi until after the damage was pretty much done.

That sucks. Did you rebuild and get it back up and running or just go to a new engine?

see his sig silly. :gay:

My visual acuity is low apparently. Need to... :eek5:

Curious - what A/F ratio you seeing at peak power in that graph ? Better yet what target did you tune for ?

Pretty much dead flat between 12-12.5 AFR which is right where I was aiming. I think there might be a pic in one of the old threads. It's the beauty of olderguy's autotune.

are you running an intercooler or just crossover? i know this thread is old but i'm debating intercooler or not

wtf? you fail to forget the greddy turbo is one of those magical non-heating ones.

i know that stock greddy's came with crossover tube so i was just asking, magnamx-5 has no intercooler and i didn't see any other info about his setup on this thread or others

richard runs water injection. click the vbgarage and see tom's setup in full.

Scot you kill me :rofl: yeah Mazda nissan he runs a big ole FMIC

Sorry I didn't reply earlier, I used a big FMIC b/c my AC is removed. It's the one one ebay with 2/5" in/outs and IIRC the core dimensions are 12"x9"3". It's a little on the big side IMHO, but it was cheap.