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Author
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Topic: reasons for my 11mpg?!?!?!
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andyman_2k01
CAFords OG
Member # 1448
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posted
 
 
ok i just recently put on a saleen series II supercharger with a pulley change to the 10psi pulley. Before I was getting around 260-280 miles to the tank N/A (freeway and town mixed) and now I am getting 160-180 miles to the tank. I went from 19lb injectors to 30lb injectors, and I am staying out of boost 80% of the time. Not to mention I am driving 60mph on the freeway just to do so. I only made 286rwhp and 335rwtq (with the pulley change). Any ideas on why my gas mileage is so terrible? For that amount of power I wouldn't think it would be so bad. Filling up $20 almost every day is pretty terrible.
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-00 Mustang GT (R Clone)
-99 Saleen Convert. #231-SOLD
Posts: 1503 | From: Bay Area, CA | Registered: Jun 2002
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Hungry Hippo
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Member # 537
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posted
you need a tune, its probably running way rich
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05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
quote:
Originally posted by HungryHippo:
you need a tune, its probably running way rich
Yeah 30# injectors is still a lot of fuel even though its concered mild compared to other set-ups out there. Might want to tune it a little make sure you are getting the correct A/F ratio.
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AKA Franky Freaking 5 liter
Advanced Engine Development
SCT dealer
Dynotuning
Engine building
916*275*8212
88 4runner on 42's
Posts: 4206 | From: Folsom | Registered: Feb 2002
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slidewayz94
CAFords OG
Member # 3101
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posted
quote:
Originally posted by 98slowhoe 'FIFTYLX':
quote:
Originally posted by HungryHippo:
you need a tune, its probably running way rich
Yeah 30# injectors is still a lot of fuel even though its concered mild compared to other set-ups out there. Might want to tune it a little make sure you are getting the correct A/F ratio.
I think the ford racing supercahrgers for the SOHC 4.6 come with 30 lbs also.
Posts: 4251 | From: Sac | Registered: Jul 2003
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TRIXSNK
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Member # 2844
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posted
quote:
Originally posted by HungryHippo:
you need a tune, its probably running way rich
![[patriot]](graemlins/patriot.gif)
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9 Sec EVO 9 is GONE!
New project in the works.......
Posts: 3740 | From: Bay Area | Registered: May 2003
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andyman_2k01
CAFords OG
Member # 1448
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posted
i got it tuned by jayl's shop. my a/f ratio is 11.7(he said that is really good). But he also told me I am running rich, around 60psi when i heard i should be around 35-40psi. reccommendations on getting my richness down?
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-00 Mustang GT (R Clone)
-99 Saleen Convert. #231-SOLD
Posts: 1503 | From: Bay Area, CA | Registered: Jun 2002
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andyman_2k01
CAFords OG
Member # 1448
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posted
oh and i put in an SVT focus fuel pump.
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-00 Mustang GT (R Clone)
-99 Saleen Convert. #231-SOLD
Posts: 1503 | From: Bay Area, CA | Registered: Jun 2002
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Hungry Hippo
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Member # 537
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posted
well it should have been tuned at 40psi. are you running an fmu?
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05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
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losbadgts
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Member # 4394
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posted
fu** u are running to rich and why so little hp, this is a 2000 gt right, cause the numbers don't look right to me.
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Why pretent someone u are not, everyone else could see it.
Posts: 3625 | From: redwood city | Registered: Apr 2004
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andyman_2k01
CAFords OG
Member # 1448
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posted
2001 gt motor with built bottom end. The #'s seem really low for what I have done to it. My next step is to get a magnaflow catback and a high flow catted x-pipe. But even still, with 9-10lbs of boost I should be a lot higher than 286rwhp. Any suggestions on how to get it not to run so rich?
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-00 Mustang GT (R Clone)
-99 Saleen Convert. #231-SOLD
Posts: 1503 | From: Bay Area, CA | Registered: Jun 2002
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Jeff S
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Member # 371
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posted
Has your car been datalogged?
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'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
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andyman_2k01
CAFords OG
Member # 1448
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posted
no i don't believe so
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-00 Mustang GT (R Clone)
-99 Saleen Convert. #231-SOLD
Posts: 1503 | From: Bay Area, CA | Registered: Jun 2002
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BlackNGold
CaliforniaFords.com
Moderator
Member # 655
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posted
your tune is with a custom burnt chip, right?...I can't believe you only have that much rwhp with 10 of boost...You're down atleast 80rwhp....
What do you're plugs look like?...
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-SLOWER TRAFFIC KEEP RIGHT-
Posts: 5132 | From: Bay Area, CA | Registered: Dec 2001
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Hater
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Member # 3085
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posted
You should be at the 350rwhp with the pulley change,,if that is the Chicane pulley I used to have,,they have a 99gt with that same set up making 355rwhp,,give them a call,,,Chicane Sport Tuning.
Posts: 168 | Registered: Jul 2003
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1WICKEDmach
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Member # 4060
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posted
Thier is a new performance shop called racetune in hayward. The owner Frank has a dynapack dyno wich is the best tuning dyno in the world. You should give him a call, he is the best tuner ive ever seen. He tunes everythin from mustangs to 800rwhp supras. He could check out your car and will tell you exactly what is wrong with it.
http://www.racetune.net/ (510)672-2808
[ October 14, 2004, 11:39 AM: Message edited by: 1WICKEDmach ]
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RACETUNE
2003 Torch Red Mach 1
Maximum Motorsports Suspension, Exhaust, 4:10's
12.9@105mph 1.88 60ft
Posts: 302 | Registered: Jan 2004
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andyman_2k01
CAFords OG
Member # 1448
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posted
i'm using a pulley from reichard racing which is a 2.6 size. checked my plugs and they looked fine. Changed em at jayl's tune shop about 1500 miles ago. believe me, i am a little depressed about spending so much and getting so little gain in hp.
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-00 Mustang GT (R Clone)
-99 Saleen Convert. #231-SOLD
Posts: 1503 | From: Bay Area, CA | Registered: Jun 2002
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