Kinjflow Calculator

Programs / Tools / Scripts
Posts: 351
Joined: Sun Jul 04, 2010 3:15 pm
Location: NZ

Re: Kinjflow Calculator

Postby VK_3800 » Mon Dec 14, 2015 1:33 pm

I wondered but it seems like a lot. So should I include the fudge factor when setting up a new tune with different injectors, or stick to the calculated value?

User avatar
Posts: 9617
Joined: Sat Feb 28, 2009 9:05 pm
Location: Tenambit, NSW

Re: Kinjflow Calculator

Postby Holden202T » Mon Dec 14, 2015 1:39 pm

if you have a known point ie. want to use a v6 3.8ltr tune on a 3.3 ltr motor, then as long as your using the v6 injectors just offset the injector rate by the percentage difference in the motor sizes, similarly, if your changing injectors to larger offset to suit injector size differences.

the injector flow calculator is only really good to give you a ballpark figure which will get the motor running, then you can fine tune from there.

at the end of the day as long as you have room in the VE table for adjusting the highest and lowest points without going off the scale then its all good. generally aim for a max VE of 85-90 will probably get you about right and then have enough lower ve adjustment .....

for example if your VE table is dialled in but your on 95 for the highest number, and lowest number is like 40, then decrease the whole table by 10% and then increase the injector rate by the same 10%, fuelling should still be pretty spot on but you now have your correct high VE and enough low ve and the injector rate that works for your combo!

Posts: 351
Joined: Sun Jul 04, 2010 3:15 pm
Location: NZ

Re: Kinjflow Calculator

Postby VK_3800 » Mon Dec 14, 2015 1:59 pm

Cool, thanks

Posts: 3143
Joined: Mon Aug 02, 2010 6:35 pm

Re: Kinjflow Calculator

Postby Dylan » Mon Dec 14, 2015 2:21 pm

What value have you come up with? It's a 304 V8 with what size injectors? What fuel oressure and type of fuel are you running?

Posts: 351
Joined: Sun Jul 04, 2010 3:15 pm
Location: NZ

Re: Kinjflow Calculator

Postby VK_3800 » Mon Dec 14, 2015 2:32 pm

Those numbers were a sanity check since I had both the specs to load into the spreadsheet and the factory bin for the same vehicle.

The actual engine will be an early headed 308 with 350cc/min injectors (at 3 bar) using a modified manifold:
Image

The spreadsheet gives me a figure of 0.075 but as a percentage of the original for the injector change (and small engine capacity difference) its more like 0.081. I will split the difference and see what works out best for the VE table as Holden202T suggested. Going to need plenty of changes and fine tuning anyway, I just wanted to do it the "right" way. Sorry for the thread jack!

Previous

Return to Tools

Who is online

Users browsing this forum: No registered users and 2 guests