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Big T
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Sydney
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September 2004
Injector Calulators Fri, 11 November 2005 08:29 Go to next message
Hey all,

Just wondering... how accurate are those injector calculators littered all over the net? Has anyone used one that was particularly good?

Here's a couple i've been using:

http://www.z31.com/software/injector.pl
http://www.witchhunter.com/injectorcalc1.htm

After all my upgrades, i'm thinking the injectors i have won't be up to the task of supplying up to 200rwkw+ Using my data i get

Injector size: 440 cc/min injectors(41.9 lbs/hour)
Number of injectors: 4
BSFC: 0.60
Duty cycle: 0.85

This combination will supply fuel for 237 horsepower


which is obviously waaay short of the power i need (this is power at the flywheel) According to this thing... i'll be needing at minimum, 550ccs to get close. So, who thinks i need new injectors?

Eddie.
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oldcorollas
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Kita-Ku, Sapporo, Japan
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January 2003
 
Re: Injector Calulators Fri, 11 November 2005 08:35 Go to previous messageGo to next message
remember that is it both a function of absolute flow (up to.. maybe around 6000rpm) and available injection time....

so for 8000rpm, you may need 33% (as a rough guess) bigger injectors than you do for 6000rpm....

ie, 80% duty at 8000 is about 12ms, and 6000rpm is 16ms.
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BigWorm
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I supported Toymods

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May 2002
   
Re: Injector Calulators Fri, 11 November 2005 08:40 Go to previous messageGo to next message
You need bigger squirters for sure!
I'd be going for something like 660s, you wanna leave yourself some good headroom. Just like everything else you've got for it so far, do it right & do it once. 440s will max out before anything else you've got & 550s would prolly only be adequate.
I'm sure Rod was selling some sard 660s or similar?

Edit: Ah, I see you've already noticed rods injectors. Smile Snap them up!
But if the bosch are only single spray, get the Sard GTR ones.

[Updated on: Fri, 11 November 2005 08:44]

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Big T
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Re: Injector Calulators Fri, 11 November 2005 08:42 Go to previous messageGo to next message
Indeed Rod does have 2 sets of 660s for sale... looks like he'll only have the one set now Very Happy Cheers for the quick responses guys.

Eddie.
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Big T
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Re: Injector Calulators Fri, 11 November 2005 09:09 Go to previous message
Joel, pmed dude.
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