Duke

Well.. but he got 6 injectors
75 lb/hr * 6 cyl = totalt lb/hr / 4 cyl = 112,5 lb/hr.
Meaning, to have his fuel capacity in our cars we would need to run 112,5 lb/hr injectors.

I personally don't think this issue is "overrated" because I have yet to say anyone with standalone and logging capabilites have anything other than very high duty cycles at the power levels we are talking about.

TurboTim

The testing for European car was done with the stock intake manifold.I wasnt too concerned with the overall power the project 951 made.I was concerned with what are parts did and the proof is in the pudding.Adding 30 horsepower is not bad for just swapping headers and a downpipe.The turbo that they were using was not the turbo that I would have chose.We are going to be dontaing a turbo to project 951 in the near future and we should hit over 375 at 1 bar of boost with the same mods on the car now:^) We are also going to test our intake manifold too.





Tim

TurboTim

About 300-320 at 18 psi with a k27/6 is typical.Dont feel so bad Lou.Honestly, I think the k27/6 is way overrated.

TurboTim

If you want to figure otu what injectors you need for a specific amount of horsepower there is a simple equation you can use:

horsepower(400) x volumeric efficiency of motor(.55)=220
________________________________________________

number of injector(4) x duty cycle(80%)=3.2

220 divied by 3.2= 68.75lb/hr


So you will need a 68.75 lb/hr injector running at 3 bar of fuel pressure to make 400 at the wheels with an 80% duty cycle.

OriginalSterm

unfortunately fuel requirements and horsepower are not linear relationships (i don't think).

i talked with dave a while back and told him i would probably be upgrading to larger injectors soon because i was almost static (100%) on the stock ones. he told me running static is fine as long as my a/f ratios were good. i guess it's true, but if they are static for more than a few seconds that will burn the coil up and cause a failure. i've done it before in a test lab, takes about 30 seconds to a minute to cause a failure from continuous static operation.

toddk911

So for less than 100$ you can get DSM injectors (42lb) and be ok up to 400hp at the crank.

eclou

Well, to put it in perspective, my ~310 rwhp also includes over 300ft/lb torque from 3k to 5k, and over 250 ft/lb to 6.3k rpm. I really am not that disappointed, so long as it will hold a headgasket for a year of track events.

http://www.986host.com/gallery/eclou/27_8_18

hosrom_951

So, is there any KKK Turbo that can make 350whp at 18psi? the K27/8 or something?

streckfu's

I'm sure there is and I think the K27/8 will get you close but you will lose a lot of midrange with the resulting lag.

Edman951

eclou,
You are running really lean in that dyno run.
You should be carefull.
Ad some fuel in the mid range.

hosrom_951

Then a K27/6........

Just a wild question, is there a K28? i know there is a K29 (which would be massive), JUST ASKING, could it be possible to make a K28 or K29 on a #6 hotside? Thus a K28/6 or K29/6?

If it is possible, what are the ups and downs of this....

JUST ASKING!!!

streckfu's

I'm not sure of the characteristics, but it would be much too big for a 2.5ltr. I've heard of K29/8 or /10 being used on 3.0ltr motors.

hosrom_951

I remember reading someone's signiature that had a K29/8 installed, but that was with a stage II head, pipes, MAF etc..............

I kept asking this question so many times and got so many responses........

Would a K27/6 upgrade support 350whp (almost) while keeping the stock AFM?

I read posts that this is/is not possible but does someone have facts to compare?

streckfu's

Someone should have the tech data, but I don't think the K27/6 can get to 340rwhp with the stock meter. It's too much of a restriction.

toddk911

"About 300-320 at 18 psi with a k27/6 is typical.Dont feel so bad Lou.Honestly, I think the k27/6 is way overrated"

Well, with GURU 18 psi chips for the K26/8, your looking at 330hp/360 tq, so a K27 should be well over that and if not, you need to do some more tuning.

And those numbers are with stock AFM.