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Old 03-24-2008, 06:16 PM   #1
xcdhridr
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Default Bigger injectors and fuel pump...Can I drive it to the Dyno for tuning?

I'll be installing bigger injectors (650cc) and a walbro soon. Would the car be safe to drive to the dyno? It about a 30minute drive (on 70mph highway). I could stay out of boost if needed.

I'm going e85 on an otherwise stage two engine. Should I put the e85 in right after the swap... or just before we start tuning on the dyno? thoughts..?
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Old 03-24-2008, 06:24 PM   #2
99subi
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ya ull be fine just stay outa boost, i did a hour ride to get tuned with 650's, no problems. just be easy. you coulda also ask ur tuner for a limp map
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Old 03-24-2008, 07:01 PM   #3
Cards2323
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Should be ok, just take it easy, i would wait on the e85 though
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Old 03-24-2008, 10:16 PM   #4
hotrod
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Are you planning on runnign E85 full time with the bigger injectors of only occasionally?

If you add the E85 on the drive down the injectors will not be a problem, jumping to 550's and going to 100% E85 is almost a perfect tune with no other changes. Going to 650's and E85 will make you just a bit rich on the E85 so it would be a relatively safe tune.

My suggestion is to put the E85 in when you finish the swap, start the car up and let it idle until it gets up to full engine temp then take it around the block easy. Then shut down and let it cool off completely. Then the drive down will put two driving cycles on the ECU with the new injectors and fuel and will allow it to self tune a bit to get the fuel trims in the ball park.

When they get it on the dyno, they can look at the fuel trims and have a real good idea where to scale the injectors for zero fuel trim on the new fuel that way.

Larry
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Old 03-24-2008, 10:45 PM   #5
Rickyh
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I drove 5.5 hours with 750cc injectors, 20g and no tune. I just changed the injector scaling and stayed out of boost. 30 minutes is a piece of cake as long as you take it easy.
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Old 03-26-2008, 10:33 AM   #6
xcdhridr
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Well I don't think I can change the scaling until my ecu is flashed to stock (currently have ecutek).

I might be tempted to drive it home that night, then back the next morning. I also might be getting a 91 octane map as well as a e85/ Suggestions for how to get it there doing that?

(for local guys...The install helper is in longmont, i'm in denver, tuner is in boulder)
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