[Project89]

Originally Posted by Pupsvette76

Ok just an update I messed around with the fi today and got it pretty dialed in didn't do much tuning just kinda changing some preset settings and it will now hot like 5300 still low since the rev limiter is at 7k... But anyway I went into my log files and my afr at WOT will hit 9 for like a millisecond and then rebound and search for the target afr which is about 12 at WOT fuel pressure never drops off lowest number I saw was like 42 and I have it set to 45 boost refernced

theres ur problem now with a wideband u have to be carefull if the motor is going way lean it can give a false rich reading on the wideband.

same goes for the other way around.

so go into ur ve map and take away a lil fuel in the area were its going into 9afrs and see if it helps , if u take away some fuel and it gets worse then u know its a false rich reading and u have to add fuel instead

what fuel injection system did u say u were using, if u need it i canprolly lend u a hand getting the thing tuned and looking at the datalogs

[hpete]

I think you need a cam with zero or negative overlap. As rpm builds the pressure in your exhaust increases to the point that it's higher than the intake boost. When the intake opens during overlap it's reversing flow because of the high pressure inside the cylinder. Another thing to think about is increasing the strength of your valvesprings because of the greatly increased pressures that their dealing with. The World Products heads that you mentioned would be a good choice, the 74cc heads that Engine Quest makes for IMCA racers would work well too.

[Pupsvette76]

I've been rseaserchng the afr 1050 Heads the have the big chamber I need large intake runner the are CBC ported and my friend at my speed shop can make me a good deal on them

[lmsport]

After spending some hours with a PowerjectionIII the last few days, I would suggest you spend some tuning it as it is not nearly as self-tuning as they claim. Also, you have to go their website and read through the forum cause there is some stuff posted there that is absolutely necessary to know that is not in the instructions.

[Pupsvette76]

Anything in particular. So I have an idea what I'm looking for

[Project89]

Originally Posted by Pupsvette76

Anything in particular. So I have an idea what I'm looking for

post ur tune ur running up on here and ill take a look at it and see if anything obvious sticks out at me as being wrong

if u cant post the tune file son here ( dont know if the board will allow u to attacjh it ) post it on mediafire and post the download link

[Pupsvette76]

I'm not able to upload my file it will not allow me

[Project89]

Originally Posted by Pupsvette76

I'm not able to upload my file it will not allow me

upload it to mediafire.com its free and it will give u a link u can post here so i can download it