Kinjflow Vs injector duty cycle.

immortality · Post by **immortality** » Sat Dec 13, 2014 8:32 am

I'm with you now. I was looking at it wrong.

Post by **Holden202T** » Sat Dec 13, 2014 10:09 am

I agree you'll not be maxing the injectors, my brothers 355 has blue tops in it (24lb I believe) and its not leaning out with them!

if it makes you feel any better mine works out at 0.026 without any fudge factor (202 on methanol with 80lb injectors) and actual to get peak VE's about 85-90 is 0.0436!

Post by **VL400** » Sat Dec 13, 2014 10:12 am

According to the log your injector DC is going over 100%, sounds like a fuel supply issue under load if the injectors are big enough for the power its making.

No kinjflow fiddling will fix this

immortality · Post by **immortality** » Sat Dec 13, 2014 10:50 am

That is not what I wanted to hear, or rather the owner probably won't want to hear.

I guess I'll put in the updated tune, get it run up on the dyno and see what the AFR's do.

Definitely enough injector to support 430 Hp @ 80% DC.

I'm fairly certain the car still has the standard fuel system so that may be the limiting factor. Any recommendations for upgrades? I'm thinking a bigger external pump, something like a 255litre external should probably do the job.

Post by **Holden202T** » Sat Dec 13, 2014 11:27 am

well its probably cheaper to replace the pump than to get a bigger set of injectors!

there is no need to go to an external (but you can if you want) .... you can get fairly decent in tank pumps, my brother has a walbro I think its 240-250 ltrs .... it goes in place of the original in the tank....

have a look here for examples ... https://www.efihardware.com/products/c7 ... ubmersible

immortality · Post by **immortality** » Sat Dec 13, 2014 11:41 am

Factory fuel system is a low pressure internal feeding a high pressure external. A better high pressure external should probably do the job I'm thinking. Also leaves room to fit a surge tank in the system at a later stage if required. He likes drag racing and probably not running a full tank of gas.

krusty · Post by **krusty** » Sat Dec 13, 2014 11:54 am

May be time to log fuel pressure. Lost count of how many times I've changed a fuel filter on the dyno and fuel delivery has recovered after looking like a failed pump or out of range injectors

immortality · Post by **immortality** » Sat Dec 13, 2014 12:02 pm

Unfortunately I don't have anything to log fuel pressure

He's fairly good with his basic maintenance so I would expect the fuel filter won't be to old but I will double check and possibly suggest it's replaced regardless.

Any suggestions for logging fuel pressure that won't break the bank appreciated.

Cheers

Post by **vlad01** » Sat Dec 13, 2014 12:48 pm

krusty wrote:May be time to log fuel pressure. Lost count of how many times I've changed a fuel filter on the dyno and fuel delivery has recovered after looking like a failed pump or out of range injectors

yeah with shit fuel these days.

6 month old filter, nearly totally blocked on premium 95 fuel. That red shit once again!

Post by **VL400** » Sat Dec 13, 2014 1:10 pm

immortality wrote:Any suggestions for logging fuel pressure that won't break the bank appreciated.

These work really well for various fluid and air pressure logging, just choose the required range .. http://stores.ebay.com/Industrial-stuff ... 34.c0.m322

Use one of the logger aux inputs for it, Holden202t uses the same setup to log fuel pressure so am sure he can chime in with more info.

With some barb fittings can easily make up an inline sender you can move from car to car for fuel pressure.

Kinjflow Vs injector duty cycle.

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Re: Kinjflow Vs injector duty cycle.