Take a look at these plugs please

[68Bird]

Trying to dial in a brand new blower combo. These plugs have 4 hits. 12-13# boost, 30* timing, Sunoco Supreme 112

I have a wideband O2 and it was showing about 11:1 at the hit and going gradually leaner to 12.5-13.0 at the 1/8th when I shut it down. I'm thinking the wideband is showing way leaner than I acutally am. These look rich to me, but I have practically no experience here. I'm just going by what I've read out there. It did run 124 mph at the 1/8th so it's making close to the HP I want out of it. Want to make 100% sure my tuneup is safe contrary to what the wideband is showing me.

The ground strap was clean down almost to the weld, but didn't show a distinct heat mark. But I think my timing is very conservative.

What do you think? It also appears that #1, #3 are leaner than #5, #7 telling me maybe I have too much jet in the secondary side?

Thanks for any help you can give me reading plugs on a blown application.

Craig

[Jim Monson]

Reading the plugs is about the same as nitrous motors. Use this thread as a reference.

http://www.yellowbullet.com/forum/showthread.php?t=7255

[68Bird]

Thanks for the reply Jim. I've read that several times and its very helpful to newbies like myself. I mainly would like a second opinion. I think it's rich based on the plugs. The wideband is showing leaner than I think it is. I trust the plugs first, I just don't trust my little bit of experience reading them.

Craig

[Maliboost]

Craig,

I think I would have to agree with you. Although, when I was running the Sonoco fuel I did not like how the plugs read. It was missleading. IMO, I would switch to some C16 & see how they look after a couple of hits. I do think though that you need to add some fuel to the rear.

Do you have a spacer under your hat? which hat do you have?

Why does the picture look green on the edges of it? is that affecting how the porceline looks?

Bob

[Jim Monson]

They all look FAT AS HELL to me.

[Maliboost]

Duhhhhh, Sorry I said Add fuel, I meant take out.

bob

[68Bird]

Added a better pic up top ^^^^

Bob, I'm running a ProCharger hat with a 1" spacer below it. I'd love to be testing with C16 fuel but I can't get it anywhere around here. Best I can do is the Sunoco Supreme 112. Maybe in spring I'll get a drum of it somewhere.

There is a tiny bit of black specs on a couple plugs, how do I discern oil spotting vs. detonation?

Thanks for all your help.
Craig

[Maliboost]

I dunno what kind of space you have, but you might consider a different hat. Im sure the spacer helps, but my understanding is that there are much better hats out there. maybe a better hat w/o a spacer.

I had slight specs on my Nitrous setup & took one more deg out of it & they went away. If you have specs now & you take fuel out of it, it might get worse, I would make one change @ a time.

Bob

[68Bird]

My plan is to get either a CSU hat or Extreme Velocity over the winter, but this hat with a spacer seems to do ok for a lot of people at the same HP level.

Thanks for taking a look at them for me. I'll post what happens this weekend after some more TNT. If this was indeed going lean at the 1/8th like the wideband said, that might be the source of the detonation on the plugs. I have some new parts to try to get the fuel curve flattened out, hopefully that'll also cure the detonation too.

Craig

[Procrew]

What type of fuel system is in the car?

[Mike Coffey]

Get rid of the procharger hat. CSU hats tend to flow the best in most apps. CSU likes to send there out carbs jetted really fat so people don't burn up there motors right off the bat. I had to drop ten jet sizes front and back for my motor. My motor is 11to 1 and I run 22psi. of boost non intercooled with a stock block. If you want to compare notes, P.M. me. I would be more than glad to help out.

[95silverstallion]

Damn, Mike what kind of fuel are you running with 11:1 and 22psi?

[68Bird]

I'd assume Mike's running C16, but I wouldn't have thought that'd be enough for 11:1 and 22psi. Amazing.

I'm going to get a CSU hat over the winter. I'm at like 7 jets front / 16 jets rear HIGHER than the way it came from CSU. I think my problem lies in the floats/needle&seats though and the bowls are going dry. Kevin at CSU is helping me get it figured out. My fuel system should support 1300hp easily (Magnafuel 500 pump and Aeromotive 132-02 bypass reg.).

[Ron Clevenger]

I chased a goofy fuel problem in my dragster for almost a year. After changing about everything, finally found that the fuel tank vent was not large enough. Your problem may be related to the tank and line supply system. No way should you be running jets that much larger than what Kevin set it up for. Make sure you don't have any 90 degree fittings, they'll kill you on supply.

Blessings.......Ron Clevenger.

[68Bird]

90's??? You mean like the one I have going to the pump, into the regulator, out of the reg. and one back into the cell?? I have a 1/2" vent. tube off the cell.

I'm going to open the fuel filter and make sure no crud made it's way in there and then maybe do a quick flow test to see what kinda volume I have.

Craig

[Maliboost]

GREAT point Ron,

I just got a new Cell for my setup & it has two -12 suction fittings on the bottom of it, one -8 Vent line & one -8 return line. I dont see how you could draw that much fuel out of it & not replace it with something. I realize that its gonna get some fuel back from the return line & some air from the vent but.............

I was going to poke another hole in it & run a -10 return from my regulator & run both of the -8's as vents off of the tank. I think that outta do it.

bob

[68Bird]

Bob, keep in mind the -8 return fitting won't have a check valve in it (at least in my cell they are built in). You'd want to add an external check valve if you use it as a vent. I had to add a -10 return anyway so now I have an open -8 I could use as a dual vent.

[Ron Clevenger]

Also make sure your vent is not being covered by fuel on acceleration. Seen that happen. Also your fuel outlet on the tank should be at the rear were gravity will generate extra force for feeding the pump.
You probably already know these things but I would rather be over basic than to leave something unsaid and be a problem.

Blessings....Ron Clevenger.

[Mike Coffey]

[quote=68Bird]I'd assume Mike's running C16, but I wouldn't have thought that'd be enough for 11:1 and 22psi. Amazing.
It's all in the timming. On the street I run Torco 110 and been upwards of 18 psi. of boost with no problem. The motor I am running right now is just a mild 355 sbc. 498 hp on the dyno N/A. I am going to put 26 pounds of boost to it next year and it should make about 1000 HP. Looking to go 8's. This is my old NOS motor. I haven't finished my blower motor yet. Ran out of money!:mad:

[Ron Clevenger]

I mean fittings like these
http://static.summitracing.com/global/images/prod/small/sum-220251_w_s.jpg (http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUM%2D220652&N=700+400304+4294924496+115&autoview=sku)They'll kill ya for sure, the flow that is........blessings.
Ron Clevenger.

[Eddie Wilson]

How much flow loss with the High dollar tube type 90 degree hose ends?

[Ron Clevenger]

How much flow loss with the High dollar tube type 90 degree hose ends?

If you mean these..-http://static.summitracing.com/global/images/prod/small/sum-220887_s.jpg (http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUM%2D220687&N=700+400304+4294924496+115&autoview=sku)they are acceptable and much preferred.

Blessings.........Ron Clevenger.

[68Bird]

Ok, thanks for the clarification Ron. Don't have any pipe thread 90's.....just the 90* hose ends.

Craig

[Eddie Wilson]

If you mean these..-http://static.summitracing.com/global/images/prod/small/sum-220887_s.jpg (http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUM%2D220687&N=700+400304+4294924496+115&autoview=sku)they are acceptable and much preferred.

Blessings.........Ron Clevenger.
Exactly. I was wondering how much difference of flow between these type and just a straight hose end.

[OLDHEAD]

When I got my present blowthru in 04, I thought I was slick. I mounted 2 gauges on the pillar (0-35#). One hooks to the bonnet, the other to fuel press. Now when i am on it all I have to do is subtrack one from the other....Wrong this car is going 8.70's and scares the help out uf me (I am 70 yo)...So I now use a liquid filled (Read sealed case) gauge that I solder a fitting too, and made it boost ref. Now 1 gauge does it all, and no subtracting.....:D :D :D :D OLDHEAD