karpetcm

iTrader: (2)

im going to run a 57 jet nitrous and 36 fuel. Want to state that actuall jetting for 150 shot is 58 nitrous jet. The fuel is kinda big i think i need to be at about 34 but im going a bit higher and work my way down. The car did great on 54 jet nitrous and 32 fuel and averaged 11.5-12.2 A/F. Kinda trying to be about the same on the new jetting. My tune is for a 125 shot, so pretty soon i have to send off the computer to Frost and get it retuned for that extra 25 shot and maybe a bit more fuel just in case im short. You guys think ill be ok with an extra 25hp running a 150 shot on a 125 shot tune?

TA1364

iTrader: (11)

I think you will be fine. How much timing is taken out?

Neal@NitrousOutlet

You should be fine going up that extra 25. Keep a eye on A/F and plugs.

Our jetting just for reference is 61N/33F for a 150.

karpetcm

iTrader: (2)

He says 2 degress for every 50hp. So right now 5 for the 125 shot plus he added extra fuel for the 125 shot before so with feul jetting i can pobably get the A/F were i need it to be and not run lean hopefully. Im running 57 nitrous jet and 36 fuel jet so the fuel jetis 2 sizes higher for a 150 shot and playing it safe on that initial hit. If it runs rich ill just back it down to a 34 fuel jet. I just got several jets that i ordered so i can have fexibility swapping out adjusting to get the right A/F.

karpetcm

iTrader: (2)

Thank Neal,

Theres is 58 and 34 so im really playing it safe going with 57 and 36 for that initial dial in. My car likes to run one jet size higher for fuel. I have a 60 nitrous jet as well but i think for there system its rated at 160-165 hit and i think thats pretty much pushing the limits of the nitrous solenoid, so ill be staying away from anything bigger then a 57-58 jetting for nitrous. I ordered a voltage booster for the fuel pump as well just for added safety, im going to really keep a good eye on that A/F gauge when i run it. If i see any high 12's or 13's around 4-4500 rpms i will back off asap and adjust jetting.

w3s1c0a5t

iTrader: (3)

I would not spray 150hp with only 5 degrees out. How/why did he add fuel for a wet nitrous system?

Rich is not safer. If you want to move up in jetting stop guessing with a wideband and a timing "guideline" that was not even suggested for your motor.

My .02c.

Neal@NitrousOutlet

Definitely sounds like a plan i hope that everything works out great

karpetcm

iTrader: (2)

Thanks for the advice, the reason why he added more fuel was because i was initially running a 125 shot dry. So i have that extra fuel from tunining on a dry hit. The car runs fine on a 125 shot wet as we speak gone through a few bottles so far no issues. Just trying to step up to 150 wet now. I will send my computer to Frost soon and get another degree pulled for the 150 wet shot.

pokaspeed

iTrader: (3)

Im only backing off 2 degrees for my 150 shot. My afr's are pretty consistant between 11.7 and 12.3. I believe im running a 63n and a 32f running 22* advanced while spraying. 5* seems like alot.

w3s1c0a5t

iTrader: (3)

You run 24* total NA? What do your plugs look like? Compression? Motor? What system do you use?

Most ls cars in the 26-31 range. Which is why the pull more timing than you are. Every combination is different. If you went around tuning 150hp hits with only 2* pulled you are going to be torching LOTS of motors.

w3s1c0a5t

iTrader: (3)

What if it the car only needs 4* pulled? or it needs 8* pulled?

What I am getting at is cars need different tuneup's to be safe. Slow down and just make sure it is right. No one on this board can tell you exactly what the car needs. So take it slow, make the adjustment the car needs, go fast and prosper.

pokaspeed

iTrader: (3)

25* total. It's working out just fine. I ran 20+ bottles through it last year. 160k on the original engine too.

karpetcm

iTrader: (2)

Well as long as your car is running good then 2 degrees is all you need. Ive been told you dont need any timing pulled to pulling 7-8 degrees on a 150 shot, lol. So all over the place on that one, but i always pull 2 out for every 50 in my case to be safe. My tuner said ill be fine but he will pull another 1-2 out for the 150 hit just to be safe. I told him not to add any fuel or anything since im running a wet system now. Frost is a great guy and is really informative.

karpetcm

iTrader: (2)

Your right, when i get enough funds i will really have to do a dyno tune and dial it in properly. On my 93Z i had a total of 8 degrees pulled for a 150 wet shot ran that car on nitrous from 166k-229k when sold and it still ran strong. Im glad i converted from dry to wet nitrous on this camaro, that adjustability with the fuel jets makes a big difference. I have to admit you guys are really knowledgable and helpfull on this site and appreciate all the advice. i dont take anything personal at all and i know you guys mean well. Appreciate all the help.

w3s1c0a5t

iTrader: (3)

You said 22* advanced with nitrous pulling two degrees from NA. That is why i said 24*. I am not saying that is wrong. I am saying that most run more base timing and run faster with a leaner tuneup and less timing.

Have you ever read a plug with the current tuneup?

The people who say you do not need any are referring to people who are on a stock tune ( they are also not correct. It needs to be tuned not just assumed.) where the timing has not been advanced. At 150hp and above on this platform tuning becomes much more important. You almost cant hurt these motors with a 100hp no matter how bad it is.

How does your tuner know that? You cannot know if your timing is safe unless you are reading the plugs or leaving a ton on the table.

Frost does a good job from all I have seen, I am not coming after him, just the way people take assumed, for tuned.


Lots of good guys on here. Most can be very direct but again, just trying to help and maybe save a motor.

pokaspeed

iTrader: (3)

I just noticed i typo'd, it was supposed to say 23*. Anyways, I looked at my plugs when I put new ones in a few weeks ago. They looked fine to me. I didnt check them at all last summer. Im not saying that is the right thing to do, but thats what I did.

karpetcm

iTrader: (2)

Ok i just got back from running the 57n and 36f jets and at first man did it run smooth, at first, A/F was 11.2 steady. Coming back it dropped down to 10.7. Both are a bit too rich either way and im thinking of stepping down on the fuel jet to 34. Hopefully that will get me to mid 11's.

TA1364

iTrader: (11)

Step up the nitrous jet to a 60

karpetcm

iTrader: (2)

I actually have a 60 jet lol with a 36f would go perfect together. Ill send you pics of some fireworks lol.

karpetcm

iTrader: (2)

I tried the 57n and 34f and still running way too rich 10.9 A/F all the way from 4-5800rpms. Might have to back down the fuel jet even more to a 32 or go up on the nitrous to a 60. Bottle pressure is the same at 900psi as before. After each 10.9 A/F pass i can smell fuel big time, so definitly running way rich. The set up i had with 52n jet and 32f jet(125shot) was perfect almost funny how with a bigger nitrous jet i have to go back using a even smaller fuel jet 32f. The only thing i can think of is if my A/F stays the same at 10.7-10.9 by going from a 32fj to 36fj then im thinking my nitrous solenoid is maxing out with the 54nj and doesnt matter that im going to a 57nj it will not add enough nitrous and show about the same A/F. Its the only thing i can come up with since changing fuel jets is hardly changing the A/F and still running rich.