porshhhh951

its gotta be something

300whp in these cars can be done on the stock turbo. He should be making 350hp

BlueRiver86

Keep us posted.

biggles

Just completed running the compression test and had readings across from 148 - 151, not perfect, but I assume not too bad. Eclou, should have called you today, but I revisited the SAFC installation last night and it appears that I have attached it according to the installation specs. The current chip used for the dyno from Danno is not a v9, but I do have one and can swap it out.
biggles

shaheed

those are good compression numbers

Laust Pedersen

Could it be the limit of the fuel pump? And/or a restrictive exhaust (such as collapsed cat-pipe)?
The AFR graph should be an indicator for the fuel pump.

Laust

toddk911

"I talked to Biggles today. Main problem seems to be in the wiring of his S-Apexi. Car is running in a basically "un-tuned" state right now, still putting down 300rwhp"

Wel lther ya go. That would probably do it

biggles

Finally, I have attached the Dyno Chart - Hopefully, it is legible. I changed my chip yesterday and revisited the installation and everything looks good. Unfortyunately, because of weather did not get a chance to drive the car. Thanks so far for the feedback.
Biggles

Andy

It looks like that A/F ratio is definately one thing killing your top end...

porshhhh951

actually I think his air/fuel while it may need some work isint that bad. I mean it does get to the 10's but, atleast is doesnt fun off the chart rich

toddk911

So that state of tune is just the chips? Since the AFC was not wired up correctly and not making any changes?

If so then not that bad. You could clean that up in the top and probably get another 20+.

OR, is it so rich up top becuase you are not holding 18psi to redline? that would make for such low results as well, coupled with the very rich current state of tune. Then you would see another 30-40+ if a tune and boost combination problem.

biggles

I have seen many different answers on the A/F numbers, but where would my A/F ratio need to be on the graph, for optimal performance. I can lean it out in the upper RPMS, but where should I try to be, 11 or 12? What about the A/F numbers for the lower RPMS? Should they be that low?
biggles

hosrom_951

You need to richen the low rpms, you are running lean from 2,600-4,000 (aim for 12.6-12.9 from 2,600rpms-3,300rpms),


You are a bit rich at the middle, but some people and vendors run that way for max torque, i run mine 12.1-12.4 from 3,300-5,000.

You are too rich from 5,000+rpm, lean it out to a nice flat 12.5 or so for max power. Again, some people and vendors run rich there, for more torque, i don't run richer than 12.1 or so.

I would be very interested to see just how much the AFM would put out though.

cpt_koolbeenz

On one of the runs, you cross 14 at 4k rpm... That seems way late. It is okay to run it at about 14.7 to help spool, but once you hit boost, your curve should drop down to below 14 and should only get lower. When do you reach partial boost and when do you reach full boost?

On the high end, you should shoot for 12 ish... 12.5, 12... If you are running aggressive timing or a lot of boost, you may need the extra fuel in there to cool down the cylinders, but 10's are way low.

If you could even out that curve and get it to the right numbers, you should get the results we all have come to expect from these cars.

hally

Yeah i would be nervous about running that lean in the low rpms, get it down to 12.5 by 3200 and keep it in the high 11s above 4000. That would be a conservative baseline, then if you try going leaner you can see if it was worthwhile.

Bri Bro

It you look at the curve below, note were the dark line I inserted intersects the curve. This is were you have the max preasure. It is around 12.6 to 1 for Max HP. In your dyno you were 10-11 to 1. Looking at the chart, you can see you were loosing HP being this rich.