Phil99vette

iTrader: (11)

Whats the main difference between a friendly and non-friendly cam. I am having some problems at the track and not sure if the cam is to blame.
Phillip

Phil99vette

iTrader: (11)

Sunday, my car was only picking up .25 in the 1/4 from nitrous. I am not sure yet if the car is running pig rich or fouling the plugs.

All motor
10.93 @ 124

Nitrous
10.70 @ 127
10.71 @ 130

Usually the nitrous comes on strong but the car felt lazy on the juice. All motor it had a good pop and felt strong. My cam specs 232/238 111lsa.

I can only think that the car is:
1) Knocking(I doubt it)
2) Fouling the plugs running rich
Phillip

SMOKINV8

iTrader: (6)

I'm no nitrous cam expert or anything, but as I'm sure you know, higher LSA's and more exhaust duration than intake duration are typical nitrous cam traits.

As for what's going on with your car, I think I'm confused by your posts just what it is you're looking for. Have you sprayed this cam before, and you're just trying to find out why your performance was down this time? Or is this your first time spraying it, and you can't figure out why the nitrous doesn't perform like it should?

Knowing what I've read from your posts so far, it sounds kind of like you're running a wet kit with low bottle pressure. I made a pass with the 150 jets a week or so ago with 850-900psi on an NX wet kit, and it acted about like an 80-90 shot. Bottle pressure plays a pretty major roll...

Phil99vette

iTrader: (11)

Bottle pressure was >1000psi on every pass. This is the first time I have tried nitrous on this cam but my last cam was a tight LSA and it seemed to love nitrous. Something was hurting performance.
Phillip

EVIL

phil, you might want to try a set of tr-8 or tr-9 plugs. they seemed to help my car out alot.

you shoulda made way way more mph than that. my car makes 118 motor and 130-131 on the 150, so you should been close to the 140 mark on the 150.

Phil99vette

iTrader: (11)

Brian,
I was only on a 100 shot. Before It would pick up 12-14mph. I know something is amiss but we'll find it out shortly. 10.93 @ 124 all motor is going to make for some sick nitrous times.
Phillip

TEA Brent

Check the bottle to see that it actually has nitrous. I had a guy come in to dyno his car and his bottle was 80% air. We were seeing 25hp pickup from a 100 shot. Also change the plugs. What is your a/f on the dyno when you hit it? What do you plugs look like? We run a 10.1 a/f and the plugs are white with a ring about half way down the porcelin.

EVIL

yea, check the bottle. i usually empty my bottle out before i refill it just to make sure i dont get air back in it.

Chicago Z06

to add another opinion for this setup.... your cam is not the best cam for the spray but it will work fairly well actually.. just don't bog it off the line and spray it.

i would verify your solenoids are all coming on, check electrical connections, if this is an older system check the inlet N20 fitting into the noid to make sure the screen is not clogged. If your car is running pig rich you would notice the lack of performance as well as tons of black smoke out the back.. are you seeing this? what do your plugs look like? if they are black and smell like fuel then they might be fouling and again check for proper N20 flow. Change the plugs and gap them to .040 i use R42LTS AC plugs with great sucess over the years.. the TR6's work well too. if this is not a fogger system have a buddy hold your nozzle/ ring whatever and hit it in open air to see how the spray pattern looks. also if your using a fuel pressure switch take it out of the loop to make sure the switch is not going bad... they are known culprits themselves.

i take it you have used this system before with the desired results? or have you changed anything recently?

i hope this gives you some ideas to check...