went from 200 to 250 (stock bottom end)
No clue on slippage before, car has only been to the track a handful of times, this was its first season. The weather will be turning soon so I dont really have much time left, almost time to put her to sleep.
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Brett Foote No luck, pretty much put the car away after this problem last year, might b another month or two before I get back to it. I had my stand alone re gone through, thanks to n2o outlet, i've changed some lines around and see what happens....
Dave
back from the dead . . . .
just got done reading this whole thing and i dont think its a supply thing. if you are running two seperate kits and each worked individually then im thinking it has to do with either the heads/intake limiting everything. the first thing i would do is run your DP and see what AFR's you get. jet it for 200 then add the 75 as a second stage. see what your AFRs are. then adjust the zex kits fuel jetting to bring it back to the correct afr. leave your stand alone fueling the same, change just the fuel jetting. by doing this then you are limiting the fuel that has to flow through the intake. once you have it leaned out a bit and you still dont have any improvements then you are being limited by your heads/intake/cam/exhaust. or another solution would be to run everything through the DP. it already has -6 feed lines and will support way more than the engine will handle. i judt dont understand why you want to throw 75 shot through a nozzle when you have a dp unless your limited by traction?
I also agree with the others that have mentioned plug gap, if its blowing the spark out then its going to run rich as hell . . . . . tighten the gap and i think youll see some improvements!
just got done reading this whole thing and i dont think its a supply thing. if you are running two seperate kits and each worked individually then im thinking it has to do with either the heads/intake limiting everything. the first thing i would do is run your DP and see what AFR's you get. jet it for 200 then add the 75 as a second stage. see what your AFRs are. then adjust the zex kits fuel jetting to bring it back to the correct afr. leave your stand alone fueling the same, change just the fuel jetting. by doing this then you are limiting the fuel that has to flow through the intake. once you have it leaned out a bit and you still dont have any improvements then you are being limited by your heads/intake/cam/exhaust. or another solution would be to run everything through the DP. it already has -6 feed lines and will support way more than the engine will handle. i judt dont understand why you want to throw 75 shot through a nozzle when you have a dp unless your limited by traction?
I also agree with the others that have mentioned plug gap, if its blowing the spark out then its going to run rich as hell . . . . . tighten the gap and i think youll see some improvements!
On The Tree
Joined: Apr 2005
Posts: 124
Likes: 0
From: Dallas, TX via Grambling State University
I know it's 3 years old but what was the outcome? Did you ever get this figured out? And who else on here is brave enough to spray a stock bottom end ls1 or ls2 with a 200 shot plate kit? I know everyone says that's to much but really is it?
I ended up finding out that all the fittings at my distribution block were leaking. I flowed the fuel side and found fuel seeping out at the compression fittings. So I realized that if fuel was leaking out at only 30/40ish psi I can only imagine how much of the spray was leaking out coming to the block at 900psi. I guess with all the leakage the max it would flow was about the 200 shot jets and thats why the car only got richer when putting the 250 jets in.
If I could do it all over again I'd prob just run n2o outlets standalone fuel sys and their plate. I know people that have had good luck with it. To close the case on this, I ended up putting the car completely back to stock and sold it as a driver. I now have a 87 notch that I'm beginning to set up for a sbe cam only lq4 with another healthy shot of spray. Should be interesting.
If I could do it all over again I'd prob just run n2o outlets standalone fuel sys and their plate. I know people that have had good luck with it. To close the case on this, I ended up putting the car completely back to stock and sold it as a driver. I now have a 87 notch that I'm beginning to set up for a sbe cam only lq4 with another healthy shot of spray. Should be interesting.
