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Old 09-01-2010, 01:03 PM   #1251
ewinters
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Originally Posted by john 1badSTI View Post
oh yeah that was only on 30psi and I have 60 ftd a half a tenth quicker.I see the car going over 110 in the 1/8th and well over 140 in the 1/4 at full weight.remember the run sunday was also done in 93 degree heat with bad air(HIGH HUMIDITY)
let me know when you are going out to kil kare again. i'd like to join in and want to get a run in before i pull the engine. temperatures look like they are going to be dropping off this weekend. i only have thurs. and fri. nights off
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Old 09-01-2010, 02:39 PM   #1252
subadupa
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I would like to see you guys run.
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Old 09-01-2010, 03:02 PM   #1253
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Those are great numbers for a dom 3, what kind of quarter mile times were you putting down? Also, why the switch from the dom? Getting power hungry?
I didn't even have a chance to take it the strip. I auto'xed it a few times but it didn't last more than a month or 2 on the stock 04 sti motor. And yeah, I'm getting a little power hungry. I just cant see running a dom 3 on a built motor. I gotta step my game up. Seems like everyone with 20g's and dom 3's end up wanting more and end up with a bigger turbo.

So what fuel pumps, and fuel rails are people running? I don't hear too much talk about those so far in my reading.
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Old 09-01-2010, 04:40 PM   #1254
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If you still plan on doing auto X I'd re consider the larger turbo choice...

As for fuel rails, get whatever is cheap, I cant talk to the flow of the stock fuel rails at those power levels, but i'd be willing to bet that the stock series style fuel supply system would get starved of fuel at mid 500 hp levels.

A good surge tank with a large bosch pump supplying fuel to larger fuel rails should suffice in either series or parallel configuration.
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Old 09-01-2010, 04:41 PM   #1255
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let me know when you are going out to kil kare again. i'd like to join in and want to get a run in before i pull the engine. temperatures look like they are going to be dropping off this weekend. i only have thurs. and fri. nights off
well I have been told not to come back to trails or kilkare until I get a cage so the next nearest track thats decent is edgewater down by cincinnati and may try to go down there fri. sept. 10th weather permitting.
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Old 09-01-2010, 04:47 PM   #1256
wrxsubiemod
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^ I love my 20G Just tuned on E85

car- 03 wrx with 04 sti swap
mods- Td05 20g, 38m wastegate, tomei headers, electronic cutout, reversed manifold with FMIC, aps 70 mil intake, aps 3in turbo inlet,BC272 and a bunch of other stuff.
elevation-1242 feet Upland CA
injectors- PE 850's with fuel pressure at 53 static
boost- 17.5ish
Tuner- Clark turner
dyno Jet dyno- 338WHP dont know torque
idc- maxed out

I had this set up to support my 30r but the turbo failed and i was thinking conservative so i slapped on a 20g and kept everything the same. I knew the injectors were small for E85 but I knew it would put me at least in the power range I wanted for auto x or canyon driving. I am very happy with the way my car performs and am also happy with a 20g. I was told i could get 20-30 more hp if I put in 1000cc injectors and duel pumps but its not worth it. Id have to change a lot for 20 hp.
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Old 09-01-2010, 04:51 PM   #1257
02RexWI
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A single walboro should be able to feed 1000cc's at 43.5 psi. static fuel pressure, but that might not be a whole lot more flow than your 850's @ 53 psi. static
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Old 09-01-2010, 04:57 PM   #1258
wrxsubiemod
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^ thats what I was thinking.. im flowing like 940 ish right now, im assuming through math.
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Old 09-01-2010, 06:56 PM   #1259
ewinters
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Originally Posted by john 1badSTI View Post
well I have been told not to come back to trails or kilkare until I get a cage so the next nearest track thats decent is edgewater down by cincinnati and may try to go down there fri. sept. 10th weather permitting.
Haha!
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Old 09-01-2010, 07:40 PM   #1260
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Originally Posted by 02RexWI View Post
A single walboro should be able to feed 1000cc's at 43.5 psi. static fuel pressure, but that might not be a whole lot more flow than your 850's @ 53 psi. static
I get 938.23cc injectors out of 850's at 53 psi...

And yes your walbro will flow 255lph, or 255000 cc per min which can support up to a:

(255000/60)4=1062cc injector,


so yes a walbro will feed a 1000cc injector just fine...
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Old 09-01-2010, 08:39 PM   #1261
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^The fuel feed of a walboro isn't constant at all pressures, like I said before... Thats why I made the spreadsheet to compare the fuel pump delivery to the injector demands.
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Old 09-02-2010, 01:03 PM   #1262
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on our dyno, one walbro with id1000cc injectors maxes out at 470whp on e85 and 588 on race gas.
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Old 09-02-2010, 01:11 PM   #1263
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sounds good to me...my goal is 400/400, DD. if i can crank her up a bit for the track with one walbro i'd be a happy camper. thats at static 43#'s of fuel pressure? stock regulator?
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Old 09-02-2010, 01:12 PM   #1264
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yes sir, factory regulator and/or factory setting of 43.5 (depending on which car we're talking about)
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Old 09-02-2010, 01:14 PM   #1265
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that is really encouraging...i'll confirm how far i get before 110% IDC.
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Old 09-02-2010, 01:16 PM   #1266
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400whp sounds like a ton of power to me, but I'm in an 02 stg 2 so 230whp is a pretty far cry from 400whp.
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Old 09-02-2010, 01:18 PM   #1267
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that is really encouraging...i'll confirm how far i get before 110% IDC.
your pump will run out before the injectors will.
It'll be easy to spot, IDC will go up, but it will stay lean.
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Old 09-02-2010, 01:27 PM   #1268
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roger. i'lll keep you guys in the loop. i love nasioc.
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Old 09-02-2010, 01:41 PM   #1269
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The single walboro will max out around these conditions with ID1000cc injectors:

45 psi fuel pressure @ 90% duty cycle
60 psi fuel pressure @ 80% duty cycle
70 psi fuel pressure @ 70% duty cycle
80 psi fuel pressure @ 60% duty cycle
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Old 09-02-2010, 01:53 PM   #1270
juanmedina
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I am confused. Doesn't ID1000 only flow like 850-870cc at stock fuel pressure?

Will I be able to maxout 1200cc injectors with single walbro at static fuel pressure? What happen if I crush my FP regulator? will my pump die?
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Old 09-02-2010, 01:58 PM   #1271
wrxsubiemod
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a lot of good reading going on. Im checking around injector sites trying to find a good side feed injector that will flow 1000+cc. lol

I want to kick myself for getting rid of my top feeds lol. they are way cheaper
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Old 09-02-2010, 01:58 PM   #1272
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i feel like i've been a lil educated on nasioc today.

correct me if i'm wrong...

43#'s of fuel pressure, 30#'s of boost (73#'s of fuel pressure?) = 70% walbro duty cycle?

it seems backwards to me that more fuel pressure makes less pump duty cycle...
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Old 09-02-2010, 02:04 PM   #1273
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FWIW:

the id2200 flow 2200cc at 43.5, 1 wally at 23psi was too rich over 6000rpm (static set to 45psi fuel press)

On boost total fuel press = 45 + 23 = 68psi fuel pressure was super rich to 7200rpm

Duty cycle < 50%
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Old 09-02-2010, 02:19 PM   #1274
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Quote:
Originally Posted by john 1badSTI View Post
well I have been told not to come back to trails or kilkare until I get a cage so the next nearest track thats decent is edgewater down by cincinnati and may try to go down there fri. sept. 10th weather permitting.
Feeler for a gathering of boxers:
http://forums.nasioc.com/forums/show...7#post31777627
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Old 09-02-2010, 02:53 PM   #1275
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Originally Posted by juanmedina View Post
I am confused. Doesn't ID1000 only flow like 850-870cc at stock fuel pressure?

Will I be able to maxout 1200cc injectors with single walbro at static fuel pressure? What happen if I crush my FP regulator? will my pump die?
I believe they flow 1020 cc/min or somewhere around there at stock fuel pressure (43.5 psi)
Your walboro will max out before your injectors do on 1200's, crushing your FP regulator will just bump up your base fuel pressure, which will cause your fuel pump to operate at a higher pressure where it is less efficient.

Quote:
Originally Posted by maxpowr View Post
i feel like i've been a lil educated on nasioc today.

correct me if i'm wrong...

43#'s of fuel pressure, 30#'s of boost (73#'s of fuel pressure?) = 70% walbro duty cycle?

it seems backwards to me that more fuel pressure makes less pump duty cycle...
43# base fuel pressure + 30# boost= 70# fuel pressure in the fuel rails.
Your injector duty cycle is independent of fuel pressure, fuel injector duty cycle is a comparison of time on vs. time off... so your ECU says inject fuel for 10 ms, then its off for 10 ms. before its on again= 50% duty cycle... you're getting your terms crossed

Your fuel pump will run @ 100% duty cycle when you're at WOT or if you've got the fuel pump wired up to switched ignition power, but it can only supply a finite volume of fuel at a certain pressure, thats why they release flow charts that shows fuel delivery volume at various pressures.

Make sense?
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