the "500 ON PUMP-AI CLUB"
Or try that new walbro 400. I need to figure out how to log fuel pressure so I can see if mine drops off at all, my buddy in the passenger seat on the dyno said it would hit about 64 psi fuel pressure and then drop off a few psi and hold steady, but AFR still goes richer at higher rpms so it's not a problem. I should have done this before with the supra pump.
Thread Starter
Joined: Oct 2001
Posts: 6,279
Likes: 726
From: Florence, Alabama
congratulations Tom94RX-7!
for a number of reasons, and here they are.
i keep a file corrected to SAE hp. it is a hp under the curve file and as such plots hp at 5000,
5500, 6000, 6500, 7000 and 7500. and adds them together.
your 2801 number is 37th of 42. (higher being higher
)... so you have a really spectacular broad powerband. that's of course what wins races w our wide trans gear spacing.
you filed in SAE mode which is around 12 hp less than STD correction but is the most widely used format.
you disclosed lots of tuning metrics.
you are very close to getting all there is to get out of a 73 pound per minute turbo...
nice job Tom.
on another point, we all should be running digital fuel pressure sensors and logging fuel pressure. it can be very expensive to not know if your fuel pressure is on the money at 7000 rpm w your right foot on the floor... especially when a sensor screws into your FPR, hooks up to the Datalogit and costs under $100.
howard
for a number of reasons, and here they are.
i keep a file corrected to SAE hp. it is a hp under the curve file and as such plots hp at 5000,
5500, 6000, 6500, 7000 and 7500. and adds them together.
your 2801 number is 37th of 42. (higher being higher
)... so you have a really spectacular broad powerband. that's of course what wins races w our wide trans gear spacing.you filed in SAE mode which is around 12 hp less than STD correction but is the most widely used format.
you disclosed lots of tuning metrics.
you are very close to getting all there is to get out of a 73 pound per minute turbo...
nice job Tom.
on another point, we all should be running digital fuel pressure sensors and logging fuel pressure. it can be very expensive to not know if your fuel pressure is on the money at 7000 rpm w your right foot on the floor... especially when a sensor screws into your FPR, hooks up to the Datalogit and costs under $100.
howard
Last edited by Howard Coleman; Oct 17, 2011 at 08:37 AM.
Thanks Howard, good to hear. My dyno file says it made 536 hp with the STD correction.
Yes good idea everyone should datalog fuel pressure. I have a autometer electronic and I think I can datalog using the purple wire that is a 0-5v output.
I just figured out I think why my fuel idc and afr curve weren't very smooth and why it kept going richer above 7100 rpm and power dropping off, in my pim settings I had 100% for 4 volts and 103.9% for 4.5 volts, my boost pim v curve was right around 4.5 volts and when it hit 4.5 volt it would have a small spike and it stayed above 4.5 above 7100 rpm and the afr curve was smooth at 11.2 afr. So I'm going to tune that out and have 100% setting. I made a line chart for my fuel map which was smooth.
Yes good idea everyone should datalog fuel pressure. I have a autometer electronic and I think I can datalog using the purple wire that is a 0-5v output.
I just figured out I think why my fuel idc and afr curve weren't very smooth and why it kept going richer above 7100 rpm and power dropping off, in my pim settings I had 100% for 4 volts and 103.9% for 4.5 volts, my boost pim v curve was right around 4.5 volts and when it hit 4.5 volt it would have a small spike and it stayed above 4.5 above 7100 rpm and the afr curve was smooth at 11.2 afr. So I'm going to tune that out and have 100% setting. I made a line chart for my fuel map which was smooth.
It would be nice to be part of the club and I'm seriously working on it. I've made 390whp without AI with To4R. Since then I upgraded or going to upgrade to bigger exhaust 3" down pipe and 3.75" the rest of the way. Currently running restrictive Apexi (i think its 2.5 thru the muffler). I've seen some guys already made it there with this turbo... so I'm hoping to come close. Will let you know in few weeks.
and I'm seriously working on it. I've made 390whp without AI with To4R. Since then I upgraded or going to upgrade to bigger exhaust 3" down pipe and 3.75" the rest of the way. Currently running restrictive Apexi (i think its 2.5 thru the muffler). I've seen some guys already made it there with this turbo... so I'm hoping to come close. Will let you know in few weeks.
3rd gen rx7 3 rotor powered... 550@10psi on a BW S475 w/ a 1.25 a/r.. yes i know not even close to being in the efficency range of the turbo but my clutch is my limiting factor at this point.. Ran out of funds at the end of the build so I couldnt spring for a dual disc and had to use the clutch I had on my 13brew.. Dual disc and a set of dss axles and ill go back to speed 1 for 650.. Really dont need nor want anymore than that..
Joined: Aug 2008
Posts: 1,018
Likes: 3
From: Kansas City, MO
My previous setup (PFC, HKS twin power, NGK 10.5s) was showing signs of breakup above 22psi. Since making the switch I have had no ignition issues and picked up 36 WHP.
Here is some info on the setup.
Aquamist HSF-3 with RX-7 summer
2 x 1.2mm jets Post intercooler
49% methanol 51% water (Snow Performance Boost Juice)
Flow 975 cc/min at 100% IDC
10.9 AFR at 24.5psi
AEM Coils
AEM EMS Series 2
Aspec GT3574
I am also at the edge of my Bosch044 fuel pump capability, so I will upgrade that when it gets warm out again.
Aquamist HSF-3 with RX-7 summer
2 x 1.2mm jets Post intercooler
49% methanol 51% water (Snow Performance Boost Juice)
Flow 975 cc/min at 100% IDC
10.9 AFR at 24.5psi
AEM Coils
AEM EMS Series 2
Aspec GT3574
I am also at the edge of my Bosch044 fuel pump capability, so I will upgrade that when it gets warm out again.
