gregrob

iTrader: (8)

For those at 200hp and above, what's your fuel system like? Feed line size?

What primary and enrichment fuels are you using?

What have you learned?

RsSean

iTrader: (27)

200 shot for now, 102 plate, hard lined by nitro Dave. C16 dedicated cell -6 feed line

Check plugs and conservative on timing

minytrker

iTrader: (13)

Way to many variables on each car to answer all your questions. I have sprayed 300 and 400 on there plates for years. Most on pump gas was 300. Depending on what intake I had seemed to effect the plugs more than anything. Best advice is to learn to read your plugs.

My6speedZ

iTrader: (18)

Any good stickies or book for us needing to break into the nitrous scene and learn to read our plugs?

FasTimeSS

iTrader: (47)

I would also like to see some good reading material on how to read plugs also. I have read post about but I am more of a visual learner.

lncboytre_d

+1 for more info on reading plugs.

gregrob

iTrader: (8)

I know how to read plugs just doing some research.

Bump. Who else is putting a big shot through it?

Carter01

iTrader: (11)

Running a .93 (roughly 300rwhp) through my 78mm plate. Number 6 is my hottest hole so i tune to it. Going with a .99 this winter....

00rcsb

iTrader: (1)

I did .078 pill (200 shot) through the stock 78mm truck intake. br8 plugs. gapped to a .28.
93 octane Pump gas. Stock 01 blazer fuel lines with one single walbro 255 in tank pump. y'd under the truck. Ran .116 solenoids. -6an nitrous feed line.

I originally had -4an nitrous feed line on it. But, it seemed that I was not getting a consistent nitrous supply. I also ended up making the line from the fuel solenoid to plate shorter than the nitrous setup to minimize a lean spike a hair more.

dferg99

iTrader: (2)

Has anyone sprayed a 300 shot thru the 102mm plate, and if so what to look for to be safe. I have a forged motor, fuel cell, etc just wanna make sure I dont miss anything.

Fbodyjunkie06

iTrader: (10)

Well I'll be spraying a 150 to start with to get a handle on the tune, then bumping it up to 200-225 for some local 275 races and then bumping it up to 250-300 if the track will hold it with no progressive and just using shock settings and timing to control the hit.

Should be fun

Carter do you run a colder plug in number 6? You using a fast 78mm intake or the LS6 intake?

Carter01

iTrader: (11)

Nah, br9efs in all holes. I just tune to number 6, bad thing about a plate is most holes are rich so I'm leaving power on the table but 6 is spot on so I have to make him happy As far as intakes go I'm running a stock non-ported LS6.

Fbodyjunkie06

iTrader: (10)

How rich is rich?

Do you look for a clean plug as in little to no fuel ring or are you seeing more of a fuel ring with you tuning for 6? Do you think if you popped a 10 in that hole and leaned it out a tad it would still live reading the plugs of course?

Carter01

iTrader: (11)

I look for little to no fuel ring YES. When I say the other holes are rich they have a distinct dark line. To some this line may be acceptable but for me it's dead rich.

As far as the #10 in that hole? Hum??? Never really looked at it that way, I'd have to do a little research before trying that but it doesn't seem like a bad idea. I am planning on running the .99 jet this winter so I might stagger some holes then also.

lncboytre_d

This is good info for me. Thanks fellas.

Fbodyjunkie06

iTrader: (10)

Great info Carter. I think in your situation going the one hole cooler route and leaning the afr out to get a leaner mixture in the other cylinders might not be good for longevity on the stock bottom end, but for all out max effort it would be an option.

Thinking about that some more if it's a fueling issue where 6 is leaner, or is it a issue where 6 shows more heat on the strap? Thinking more about this they are probably if not most likely directly related.

I have found in talking with most nitrous users that they see a clean fuel ring between 12.0-12.8 afr with every combo being different.

Is this close to what you have seen with yours?

ATVracr

iTrader: (5)

Done it before, It will help some depending on how far off that hole is.

Definatly worth a try. Of course just put it in and run the same tune up 1st so you can see what it does. You know the deal.

Carter01

iTrader: (11)

Yes sir, that's what i would do first! I really want to throw that .99 jet in there soon and I think playing with some different tune-ups might so the trick. Thanks!

Sorry OP for getting off track but hope this info is helpful to you

Carter01

iTrader: (11)

As you stated the two are related so it's hard to tell which is the dedicated culprit. As far as AF goes, well I have no idea. I don't run a wideband, strictly plug reading here.

Fbodyjunkie06

iTrader: (10)

Gotcha, nothing wrong with that. I use mine strictly for data logging and fine tuning the VE table and PE tables.

ATV is this the case with you on your combo's? 12.0-12.8 seeing a clean fuel ring?

I also like knowing with the wideband what my AFR is at certain points on the track mainly at launch and the first 330' and not an average burned into the porcelain from the last half of the track.