" never heard of a porsche fan who didnt like my ride and instead insisted it was a mistake to make it so fast, geesh"

Once you get addicted, there's no such thing as enough power or fast enough! Check out Doug's <a href="http://www.nsxfiles.com/sears_point_2000.htm" target="_blank">Go-fast Crack Pipe</a> story.

 

Tecart where are you in NY? You should've come to the dyno day if you're in southern...(It was in nyack, just over the tapan zee).

I've been told that if you roll onto the boost slowly (using the throttle), you may feel the timing retarding (due to knocking). What does it feel like? Little hesitations kind of...I can't really describe it, but you'll know it when it happens.

Hmm I would recommend just going to your buddy at autothority and saying "burn me chips!"
He'll have to fugg around...play with your fuel controller and FPR to get the a/f curve right...and then play with timing in the timing map in the chip until he gets good power...he should know what needs to be done. I find that I overthink things instead of just going there and doing it...you may be doing the same thing.

 

"i need injectors for 20-25 psi max boost with a kkk 29 #8 turbo that flow 800 cfm at full boost, "

Ok, you've got about twice the flow as the stock configuration. So I would think that 83lb/hr injectors would fit the bill here.

" if i get the right injectors sized up what should my timing be set at or do i just leave my k29 chips alone and assume the jump from 18 to 25 psi in boost will be ok since i also added -3 degrees retard on the dme fuel quality rotary switch on the dme box."

Are they really custom-programmed K29 chips for the level of boost you want to run? Then I would start tuning using -3 degrees timing set on the DME to be on the safe side. I suspect that the DME can only dial back -6 degrees total automatically anyway regardless of your intial setting.

Then follow with dyno-sessions to dial in a perfectly flat 12.5:1 air-fuel curve at full-throttle. Next work with ignition tuning.

Turn the DME FQS switch back to stock 0 degrees timing and do another dyno run. Compare this chart to the one at -3 degrees timing. If they are the same, then you want to go back to -3 degrees timing. Most likely the DME is retarding to -3 degrees automatically because it senses knock, thus no differences between the -3 and 0 degree charts.

If you turn OFF the smoothing functions of the dyno program, you can tell you have knock/detonation because the curves will be jagged instead of smooth. This indicates that the DME is retarding the spark, then turning it back up, then retarding, etc...

 

danno if i go to 83 pounders, would they be running at 50, 70, 90 percent of duty cycle? am i like running my 52 pounders now at 80 percent? and if i go to 83 pounders i will lower the duty cycle to 60 percent? all i want, is to run the right size injector, that is run at the lowest duty cycle percentage to give me enough fuel at full boost at 22 psi with a k29#8 turbo which flows 700-790 cfm. so am i ok with my 52 pounders or should i go bigger to get more power with more fuel? thanks again, i got 1 month to send them back for a bigger set

 

I'm using 83 lb. injectors for my car. Tec3 management running 20 psi. The duty cycle is in the 75 - 80 range with About 350 at the rear.

Here's a map of the ignition timing I used. No knock on 93 octane pump gas on an 85 degree day. From 3000 to 6500 the fuel is right at 12.2 and gets to just below 12 above 6500.



Alan

 

Danno,
Could you post a couple samples of what detonation looks like on a dynojet chart? Will you hear the detonation if it shows up on the chart?
Paul

 

Tecart...I think you need to go to standalone engine managment with 83# injectors....

 

I hate to be a dick, but I can't let most of this slide.

"i have a K29/8 800cfm 22psi 350hp i know cars but should i do this and that and run on sentence"

I have seen you post here for a while. You like to beat your chest about what you have, how fast you are, and what you think you know. Funny, seems to me that you really don't know that much. As soon as someone questioned your knowledge, you throw up the "i have run 22psi for 8 years and put on head gaskets rod bearings and more run on sentences." Chip this, switch that. Do you really know what you are doing?

It is your car, your motor, and your time. Go wild. Let me know when you blow it up so I know what not to do. (Although I know it already).

And please, learn some punctuation and proper scentence building. It makes my eyes hurt to read jibberish.

 

I think I have one of the better attitudes around here. Rarely do I say a cross word about someone. By the way pal, I don't find the need to call others "********" or the like to make a point. Simply put, your writing and typing skills suck. I think you agree with me. Go read one of your posts, then read a book. (english preferred)

Now, let's just get this straight. I never said a thing about not posting a question. That is what the list is for. I am not saying you should not ask about timing, fuel, or whatever you don't know about. However, you say in every post that you know all this great suff about your car, but you don't even understand the basics of tuning. You asked on the 944 forum about octane/race gas? If you do not understand octane and knock, you should not be attempting to change timing, since it appears you do not know it either.

Of course I don't want anyone's motor to blow up, or car catch on fire. But you seem to find the need to prove yourself to the forum every time you post. Fortunately, I can see through the BS front you put on. "i have k29/8 and it is bad *** and i did it meself but and i put special race gas in tank i thinks me gots 500 hp i mean 40 hp it nails me to the seat." You ever dyno that car, or just the *** dyno? I think of you rolled it on a dyno and had someone tune it, you could find why it is knocking (aka lean as hell). You might be able to hit 380 with some injectors. Good for you.

Now for the attacks on me. Yup, I have rebuilt my head twice from bending valves. The new factory tensioner had the idler on backwards. My bad I did not catch it. So be it. Yup, the car has caught fire, and I am rebuilding it myself. Whooptie doo. I could give a horses *** if you could care less. Yup, I have some money into it, but that is my deal, my life, and my choice. I don't need your approval to do so.

Why don't you do this. Sign up for a DE. I will happily meet you in New Jersey sometime in September. I'll pay your way if you turn better times than me, but buck up the green when I erase your time from the big board. I'll run you with my street 951, 330hp, on street tires and brakes. You bring your toy however you want it. We'll see who is in the sand first.

<img src="graemlins/a_smil17.gif" border="0" alt="[blabla]" /> Talk the talk, but you better know how to walk first. <img src="graemlins/oops.gif" border="0" alt="[oops]" />

 

I-90 runs from buffalo to new york city, ill meet you anytime along that stretch( that gives you 450 miles to choose from) and bring your friends

I must be confusing you with an **** retentive person that would ask for a race on a heavily traveled main interstate that is used by trucks and families to travel across NY. I am sure I am mistaken. Please advise as I travel this road often.

 

I dunno, maybe it's just me, but making fun of the way somebody writes or types is kind of like picking on someone with a speech impediment. There's bluff and bluster a plenty on this board, it's just usually in a more muted form.

Alan, that sure is neat to see the ignition graphically represented. Thanks for the tuning insight.

 

Wow.. you work 60 hours a week! You are a real man now.

Nope.. I will not race you on a public highway. It is illegal and unsafe. I could care less if you can drive well.. it just proves you are an idiot for putting others at risk. Take it to the track, like I agreed to do. Let's put it in the twisties and see who can handle it. If you want to run 1/4 mile, then I'll hop in a top fuel dragster complete with 7000 nitromethane burning horsepower. Drive the car as it was intended. You win, I pay, I win, you pay. No checks, cash only.

How am I a jealous little man? I sure am not jealous of you or anyone else on this forum.

 

I think the best would be to go to a total engine management system as presented here

<a href="http://www.speedforceracing.com/index.html" target="_blank">http://www.speedforceracing.com/index.html</a>

or at least to an electromotive ignition system. I do not own a 951 yet (but looking for one) and the problem I found when test driving and looking at cars seem to be that the 951 doesn't have a lot of low end torque (compared to my other Porsche and other cars I own), so my concern would not be maximum power. What do you guys think? Is this possible in a 951 or will it always only be maximum power?

Thanks

 

I'm gonna have to second the post concerning correcting someone's typing akin to saying that they have a speech impediment. That's pretty low. We're all on the board to learn from each other and that seems to be what Tecart was trying to do. To bad it ended up in a pissing match.

Tecart, best bet is to have somebody like Autothority modify your timing and fuel for your exact combination. Keep the ARC II for small adjustments. Best of luck,

 

Perhaps I was a bit harsh on your typing skills. It is hard to read, but I probably should not have said it in the way I did. My apologies.