recently put some Pro2s in my car. sat for a few mins to get it to idlea nd eventually i got it, how ever the cams idle pretty lumpy, but i guess i can live with that.
Now my problem comes if i hit the throttle, when it rpm drops it drops so far the car dies after a sec of stumbling around columns 5-7 ( on Hondata S300) at around 500 rpm.

i wonder if anyone can give me an idea of how i can get the car from dying once the throttle is touched and the rpms drop.
My setup is 11.7 CR B20, RLZ head, victor X mani, 70mm throttle body, tri-y header, 668cc siemens injectors.

or any one willing to share a map i can use as a starting point to get these cams goin ?
Really need a hand so all help would be appreciated.

 

Before you proceed any further. Did you check your valve to valve and piston to valve clearances? Did you properly degree the cams in & check clearances?
Did you check your retainer clearances? Rocker arms?

I have tuned a couple of cars on pro2s. They are not extremely hard to get to idle if they are setup properly. Take the car to a professional tuner or buy an e-tune off a reputable vendor to start with.

 

You will need to do a lot of adjustments with fuel and ignition to get them to respond well. Make sure the cams are degreed or you will never get them right. I don't have any Smanager maps saved, but here is the low cam ignition and fuel maps from Crome from a 1.9 liter on Pro2's with 370cc rc injectors. You may be able to use this to help you out. DO NOT USE THESE EXACT VALUES as this is for this particular setup. You will notice the difference of the off idle ignition as well as how much fuel is pulled away to maintain idle. The Pro 2's have a lot of duration and affects the MAP readings causing the ECU to want to add fuel. You have to pull away fuel at idle quite a bit.

 

yeh , they are degreed and everything is set , however the damn things dont stay in once the accelerator is let go. anything else could be worng , cuz i am about to take them out

 

Load a stock map for gsr, adjust fuel multiplier for your injectors, and on low cam fuel highlight columns 1-5 up to around 900 rpm. click adjust and negative 25%. load map and try it. If it still wont idle, take another 10% out and try again....

You can add 1-2 degrees timing around idle just to help get you going and later fine tune this. You will find to get responsiveness (sp?) off idle you will have to mess with your ignition timing from just off idle alot to get where you want.

Once you get it to idle you will notice it will be trying to idle in columns 3-5 instead of 1-2 like with most cams. This is the overlap causing the map sensor to read less vacuum and your ECU will try to add fuel and timing (as shown on your low cam maps in this area). You will have to adjust wherever you are idling on the maps down to near what you see in columns 1-2 (where most engines idle on the map).

Hope this makes sense...

 

so u are saying to take away 25% fuel once i put in the new values of 668 in the injector field?

i actually had to ad a bit to get it to even start from the get go.
i'll post a screen grab of the tables in a sec

 

If you had to add fuel to get it to idle, then your problem is somehow you are not adjusting your fuel compensation correctly for the injectors. It is dying off idle (when you step on the throttle) because it is leaning out.... waiting for screen shot..

 

here ya go , and as you can see i actually had to ad quite a bit of fuel. and this was just to get the car to stay on period.

Had to scale the table some to get the car to be in safe AFRs.

 

anything leaner than those values the wideband reads 17.6 - 20 and in the said columns 5-7 it still gets too lean

 

I see you adjusted the injectors, but did you also adjust for the added displacement? (b20 vs b18) if necessary add more fuel in the rest of the table.

 

yeh i did have th entir table scaled but since thecar wouldnt stay "alive" i started over and my major concern is in the areas to get it to no die.

 

What areas are you idling (or lack thereof) on the map? columns 4 and 5???

 

when the car starts and does run it idles in 3-4 (900-1150) . when i hit the throttle when the rpm drops it goes to 5-6 or 6-7 (in the 500-550 rpm range) .

 

You probably need atleast 20% MORE fuel in the areas off IDLE

 

Add timing to compensate, you should be around 17-19 degrees ign timing @ idle for these cams, also, they like to run lean @ idle.

I've already told you call me and i'd help you..

If your using crome, i can let you have my map...this is my map - pro2's degreed in @ +1 intake and +3 exhaust. this should give you something to go on, this is a p30 base ign, with me reading plugs.

http://www.mediafire.com/?wok229nk12v9o5g

upload your s300 map somewhere, and i'll fix it for you.

 

ok

 

I replied back, and sent you another map if you have anymore questions just email me or call me 225-505-7729

 

just checked it thanks. will try it when i get home. if i have any questions i will call u. thanks

 

good information

 

Iac

 

take ur car to a real tuner.