PaSteLaSo4U

iTrader: (-2)

Just trying to find out why my car only made 510. N/A she usually makes 400/350 tq, with 25-26 deg. Today i paid to make 3 quick dyno runs to see if she picked up any power from upgrading 3an to 4an noid to plate hose line and 62/33f jets, so she was on the 18 deg tune..
Base pass she made 374 n/a and the other 2 passes on the shot she only made
510/470 tq. AFR's where mid 12's, considering it was 88 degrees outside but still, i think she would had done better than that..
I read on ls1tech how some of the big nitrous guys recommend low timing with leaner mixtures but i dont think thats really working on my case or something else its amiss??

i'm spraying through a Nitrous Outlet 90mm plate

minytrker

iTrader: (13)

Every setup is different but pretty much none of ls1 cars I have tuned on a 150 shot ended up on 18 degs. Did you pull any plugs or how did you determine it needed 18 degs of timing?

lemons12

iTrader: (71)

Im no expert by any stretch.. But i would expect 21*.

PaSteLaSo4U

iTrader: (-2)

just went by the 2 deg for every 50 shot rule of thumb and also by ATVRacer s 'recommendation of less timing and leaner afr's

HCI2000SS

iTrader: (2)

So your a/f is in the mid 12's on the nitrous?

Killer5.3

iTrader: (1)

I see you have a PI 3800 converter. That converter is fairly loose and even more so on nitrous. If it wasn't locked it will hurt dyno numbers. I would take it to the track and make some passes and see what the et and mph are. I would probably put about 2 degrees back in it and make a pass and look at plugs. Put a BR7efs in it if you don't have already.

PaSteLaSo4U

iTrader: (-2)

yeah ^^ , on motor she likes it even leaner, around 12.9-13.0's. I'm trying to follow what the experts say "you gotta give her what she wants" I even heard that what she wants n/a for air fuel its the same she would want on the dope..

Killer5.3

iTrader: (1)

I wouldn't try and dial it in on a dyno. You are already in a safe range so take it to the track and dial it in there.

PaSteLaSo4U

iTrader: (-2)

thanks killr. She's already sporting the br7's. The 3800 vigilante was sent to FTI and they restalled to a 3200 and told them to tighten up for nitrous. I would pay someone to help me tune the car at the track by pulling plugs and making adjustments as needed, but everyone around here that I know only use dynos to tune and don't bother pulling the plugs.. and quite frankly I would rather pay, this car is a p.I.t.a specially on passenger side, it takes me 7 mins on drivers side and god knows how long on passenger's side, the 2 back holes are killer.

xpndbl3

iTrader: (23)

Find the fast nitrous guys at the track and offer food, beer, cash whatever and they'll probably take a look at it for you and offer suggestions

Killer5.3

iTrader: (1)

Unbolt the coil pack brackets on the passenger rear and move them out of the way. Makes it much easier to get to plugs and only takes a minute to unbolt them and back when you are done. Like he said find some hardcore nitrous guys at the track and they are usually glad to help.

PaSteLaSo4U

iTrader: (-2)

Not that i'm going to do it without proper plugs reading, but will 2 or 3 degrees of timing give me the 25+ i'm running short?

ShiznityZ28

iTrader: (11)

Your going in the right direction with the right attitude. I would think you will end up 21-23* put 1 degree in and check plugs keep going while mph climbs and the plug stays in check .in the 1/4 i like the timing about 3/16 from the tip but have run it to the bend closer to the bend the more sensative it will be to air conditions.

I also agree it will like 12.8-13.3 NORMALLY

ShiznityZ28

iTrader: (11)

If it needs 3 yes. when your close to the right tune on a 150 shot 1 deg is 6-10 hp or so.

ATVracr

iTrader: (5)

Your doing just fine, dont try to get every last HP out of it on the dyno because it will change at the track anyway.... might even want to put a little fuel in it before the track, most dynos can not simulate the load the car puts on the motor. your nitrous dyno pulls probably dont last 9-10 seconds like a full pass at the track.

Dont be in a big hurry, baby steps and it will live and run fast.