TBucket Engine Project (Dart SHP)

RICK!
that looks like mostly fuel additive ash with minimal oil burnt ash,

http://garage.grumpysperformance.co...-carbon-and-fuel-additive-ash-build-up.12475/

Id suggest changing the spark plugs and swapping to a different brand,
and perhaps a higher octane rated fuel.
I,ve seen several engines foul, spark plug electrodes like that and changing the fuel generally helps
ETHANOL LACED FUEL HAS A GREAT MANY ADDITIONAL EXTRA ADDITIVES
mobile , Exxon and Texaco generally seem to work well IF YOU CAN LOCATE the stations that sell ETHANOL FREE FUEL

http://pure-gas.org/extensions/map.html
 
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Is that MTBE Additive Grumpy ?
I thought it was outlawed by the EPA decades ago.

Just find MTBE in Octane Boosters like TORCO 100 + unleaded formulation octane booster in the 1 quart can.

I think 104+ is MTBE Free now.

I have found Shell 93 with Nitro additive they sell here to be really good. Its E10 formulation.
425 is happy. Cranking compression 185 psi with iron heads.
Try & use Phillips 66 Ethanol free 91 most of the time.

Right on the outskirts of Chicagoland there is a CITGO Gas station with ethanol free 87, 89, & 93 octane 100% gasoline.
I stop there often with the Grand Prix to fill up before heading home West.
It runs best on 93 Octane Citgo 100% Gas.
The Guys there are Middle Eastern( Good Towel Heads hard to believe I know Grumpy).
Leave me alone & nice.
 
I did change to the some slightly used plugs that I have, but they are the exactly the same
type ....... Champion RN12YC. I also have 3 sets of the same when I was going to put the
engine on the Dyno. Will check into changing to a different brand.


The highest octane I can get at the pump is 91 and I'm already using it exclusively. Usually
at the local 7-11 stores. I like that there is a quick turnover in fuel with all the traffic that goes
thru them.

When in town I always use pure gasoline, but on the road I don't have that choice. I did find
this station that's sign says they carry VP Racing Fuel. I've checked there and all they carry is
91 octane. But it should be top tier fuel.

Capture.JPG
 
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Try the Shell Nitro 93 Rick.
Empty the T- gas tank.
Add 2-5 gallons of 93 Nitro.
See how the T runs.
Shell stations are nationwide.
Should find them easy even traveling to small towns.
 
Indycars said:
The highest octane I can get at the pump is 91 and I'm already using it exclusively. Usually
at the local 7-11 stores. I like that there is a quick turnover in fuel with all the traffic that goes thru them.

When in town I always use pure gasoline, but on the road I don't have that choice. I did find
this station that's sign says they carry VP Racing Fuel. I've checked there and all they carry is
91 octane. But it should be top tier fuel.
Click to expand...
You are in Oklahoma Rick. Take a trip to Midwest Street Cars (Street Outlaws) and siphon the fuel out of their race cars.:p:rolleyes::D

OK seriously, here's my 2 cents of things to consider: what piston rings did you use and did you allow enough time for them to seat
before changing to synthetic oil? What are you using to control your timing advance and is there a jump up in the curve at around
1800 rpm? I hate Champion plugs - try a set of Autolite regular copper core - they are inexpensive too. They always fouled the least
for me - Champions were the worst. Is 1800 rpm on the main jet of the carb, or is it still in transition from off idle (power valve)?
 
I thought the same of Champions for a long time till I tried in my 1987 Corvette.
They work fantastic in that car.
Just standard copper core $1.99 Champions.

What made me think to try was reading up on Mickey Thompson & his days set land speed records with Pontiac V8 power.
Every single engine, car , & record he set with Champion Spark plugs.

So my conclusion is people cant Tune or they suck at it.
Or they don't tune period.
 
All Mickey Thompson had to tune for was WOT at the Salt Flats. No driving on roads with stop signs, lights, traffic.
The ECM in your Corvette will adjust for all of those conditions. Rick is using a Holley carb.
Conclusion: Rick's combo is not tuned YET to the precision of Mickey Thompson or computer-controlled fuel injection.
 
You would assume on the Salt Flats You just stand on the Gas & never let up.
I found out reading the Opposite was True.
I read The Book CHALLENGER.
Written by Cliff Borgensinn.
Mickey Tells like it was.

The tires are very narrow for low rolling resistance.
3-6 inches wide rubber.
Mickey had AWD. The 1st ever on the salt.
750 HP Nitromethane 30% .
HAD TO RUN 10 MILES FLAT OUT EACH WAY.
Gradually get up to speed feathering the gas.
4 transmissions & clutches used in Challanger.
All synchronized and engineered by Mickey himself .
His day job was as A Pressman for rhe LA TIMES California .

Its like driving on Wet Ice the Bonneville Salt Flats 200- 400 mph.
Return road he hit 421 mph.
421 Not official with SCCA.
406.6 MPH IS.
 
4 Pontiac V8 engines to tune also.
All had to run at exact same RPM Under load so Clutches would not burn.up.
32 Champion spark plugs.
4 Vertex OAC Magnetos used.
4 8-71 Superchargers.
All Hillborn Constant Barrel valve injected.
No computer used.
Human minds.
 
Loves302Chevy said:
OK seriously, here's my 2 cents of things to consider: what piston rings did you use and did you allow enough time for them to seat
before changing to synthetic oil? What are you using to control your timing advance and is there a jump up in the curve at around
1800 rpm? I hate Champion plugs - try a set of Autolite regular copper core - they are inexpensive too. They always fouled the least
for me - Champions were the worst. Is 1800 rpm on the main jet of the carb, or is it still in transition from off idle (power valve)?
Click to expand...

Well I think I waited long enough for the break in oil, I changed it twice before
moving to the synthetic.

Using springs and weights to control ignition advance. I would like to use up the
3 sets of Champions that I already have, but might be worth trying something else.
I just hate the thought of a Ford product in my Chevy! :rolleyes:

PV is a 7.5 inHg. I can tell you from the AFR gauge that as I ease into the throttle to
climb a hill the AFR will rise to 16 to 16.5 sometimes. Doesn't sound like the PV is
coming in at that small increase in butterfly angle. Therefore it shouldn't be a factor
on level ground either.

At least nobody has mentioned the word detonation when talking about the spark
plugs. The sound I heard is new to me just recently. Heard it the first time coming
back from Arkansas last week. The car now has about 4500 miles on it.
 
I don't see Gross Negligence coming from You Rick.
Your Too Methodological by Nature.
Detonation non issue here.
 
I'm with Grumpy, unleaded fuel additives. The buildup can stay hot enough to ignite an incoming fuel/air mix causing pinging.
 
NOT A TA said:
I'm with Grumpy, unleaded fuel additives. The buildup can stay hot enough to ignite an incoming fuel/air mix causing pinging.
Click to expand...
Hence the reason it started making pinging noise during my trip with the additional
1200 miles residue buildup. If that's true, then the newer plug I put in should eliminate
the pinging noises in the short term.
 
I hate Champion spark plugs, seem like they never last.
Am a hudge fan of NGK or else i use acdelco.
 
Last set of Champion Copper Core Spark Plugs I had in my 1987 Corvette Roadster for 2 years & 35,000 miles.
Gave me Zero issues.
 
Rick, I thought of 1 thing you are doing that nobody else is.
Brian mentioned the valve seals. You have that aluminum plate deflector
mounted just above the rocker arms. I also think that is a great idea, but
is it possible that the deflector is causing too much oil to be around the valve
stems and seals and the oil can't be controlled effectively?
For the quickest and easiest test, change the plugs and remove the deflector
before diving into anything deeper.
 
Right now ngk 7 (r5674-7)no resistor but its too cold (especially for street). so am moving to
heat acdelco 2 (r42ts) or ngk 6(ur6) - these are 14mm thread/taper .460 reach extruded, with resistor.

They are too cold for your application, since i use a blower.. mean to reduce detonation.
 
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