New Build same motor

[triplenickel]

Put it on 'em bigd! Good luck!

[butterbean]

keep us posted on your progress, I can give you my number if you need some help tuning at the track, just let me know

[bigdaddy198]

Well Guys this weekend was a very non productive as far as tuning I did get it making very consistant 6.70's passes but I had really bad liuck with coolant leaks. I got the coolant leaks fixed went all the way from my 98 squared to 107 squared in 2 jet increments with small improvements. The car also got me stopped and turned around 4/5 times as my evacuation tubes were dripping condensation I pulled my caps off the valve covers only to find the stainless mesh was plugged with this nasty looking butter type crap. My Buddy told me it was the same kind of stuff he ran into when running alky. I did get some gas and cleaned them up. Got them back in and went 4 rounds in the finals before getting nosed out. The car ran a best of 6.71 /6.74 /6.74 /6.74. Its showing a white ring around the base of the threads and is just starting to show some color on the electrode. I am at 35 degrees total timing. Just wondering if I am chasing a ghost.

[triplenickel]

Hey big d. Have you always run the timing at 35*? When you advance the timing, you create more cyl temp. Have you read the "spark plug tuning on e85" thread? It may help you out. It is specific in what to look for with NGK plugs. Give it a read if you haven't already.

[butterbean]

I think it need more timing and less jet, if you have IRON heads the timing need to be like 38-42 total but if the heads are aluminum then 30-34 is good, I know sometimes having the timing to high makes it hard to crank but you will need to figure out a different way to start it like spinning it over then turning on the ign, of a start retard box but if you have already tried the timing higher tell me to go eat shiite!!!!!!! LOL!!!!!!! good luck, and got to the finals I would not biotch to much

[bigdaddy198]

Well when I got the car it was on 110/112 octane and when I checked the timing it was @ 30* total timing. Then when I went to e85 I never touched the timing. But either someone moved it or when the motor was out it got moved but my tune kept on getting better. Right now its @ 107's squared its warming up quicker than it was when I first put this carb on it and it was only 104's squared. Also I started weeping coolant out of my puke tank not from overheating but I added a catch can so if I have to I can empty it. Then my Buddy told me to put on a new stant 21/25lb cap get rid of the 14 lb cap. Well I done that its working good but its building some pressure as my Radiator is a smaller 4 core drag aluminum radiator it kept the 509 cool on alky so I left it alone. I am running a Meziere 42 GPM pump electric and no thermostat just a washer type deal that fits in the T stat spot. So if I jump my timing to 38 how big do you think I will need to go on the jets. Last Saturday it was at 104's squared I was getting a white ring around the base of the plug but it still looked lean to me hardly any color on the ground strap. And it was only running 6.79/6.80 and 10.75 in the 1/4 I went backwards in my speed so I jumped it to 107's squared snd it ran 6.70's like 4 passes in a row. If I jump up the timing do I need to keep going up on the Jets???

[bigdaddy198]

Ok Bean I just re read your post so more timing less Jet. Its weird when it was T 104's after I took out the power valve and put the plug in it the car had a really heavy rich smell to the exhaust. Also it was hard as all get out to get my idle right. Well after we went up with the timing the car will start up cold and within a minute will idle without having to hit the throttle lever every know snd then. I have a centrifigal advance so I can set it to fire up at a less timing right now its at 22* at startup once its over 2700 rpms its at 35* and stays there thru the whole rpm band. Its got better response and is still pulling but not a huge difference when I jump up on jets. Also when I bought fuel the last time it was only at 83% I plan on going to refill my Drum and will retest should be right at 85% or I will go get a drum of Renegade e85 and I know it will be 85% plus I am thinking about getting a leaded version. I am not getting alot of rich smell out of my exhaust after warm up but I have noticed once its warm its starting harder.

[butterbean]

well if it is getting hard to start then you don't want to put to much more timing in it because you don't want to knock the teeth off of the ring gear, so be careful I just think 107 jet is getting on the high side but the MPH will tell, are you able to run in the 1/4 mile because its kinda hard to tune by MPH in the 1/8th it needs to be stretched out per-say, but I think you are close. When you were running the 6.60's times what was different??? the track, the weather, the fuel, what??? it don't matter if it runs 6.60' or 6.80's as long as its consistent.

[bigdaddy198]

I just emptied out the last of the barrel. I checked it and when I tested it the bottom is milky all the way up to about 78% and its still changing I think my fuel got some moisture in the Barrel from heating snd cooling. Its on plywood in my garage and the pump is sealed when not in use. Its been over a hour and the bottom half is still loaded with bubbles. Just like it gets when you first shake the tester. Best I can tell its below 70//75% going up to re up on fuel gonna test it good never had a problem but we have had terrible weekends maybe from not using it the stuff is lost its edge.

[bigdaddy198]

After letting both of my testers sit for a good hour I am at 77% on one snd just over 80% on the other either way I am going to drain my cell when I get home and rejett it at 103 squared. Then refill everything I am gonna go do a few test hits tomorrow to see if I can sort this out. I got my timing at 38* total timing comes in @ 2750 rpm stays right there too.Does not start hard cause its at 22* at startup

[s10gramps]

That's a pretty big difference between the testers John. Where and when did you get this batch of fuel?

[butterbean]

so the new fuel is 80% or is that the old fuel??? if its still at 80% then the 103's will be close, let us know

[bigdaddy198]

Well I tested the new fuel last night it showed 90% but after sitting all night itvwas at 85% dead on this morning. But I went to a street car brawl at our local track. I sat there for 4 hours and only got to make 2 passes. The 1st pass was @ 103's squared. It ran decent but not the normal hard pull it usually has. Also I pulled the olug after the 1st pass it showed a great white ring around the bottom of the threads. But the rest of the plug looked way lean. So I went up to a 105 squared set up and put a set of heat range 8 NGK plugs and it ran a 126@10.70 and a 6.80 in the 1/8th but its done slot better the 1st pass was a 119@ 10.91. I am thinking about pulling all my filters and cleaning the carb pump and regulator. I am kind of dead in the water at the moment. And the bad thing is if I even mention my fuel all of my Buddys say man get off that fuel its no good. But I know better the car is just going thru a clean out phase or something. We have not put a nice pass in the book all year so far. I am just dumbfounded on this tune up.

[butterbean]

126 MPH is hauling the mail but it don't match the ET, you got something else going on Dude, my Buick ran 10.42 @ 126 in the 1/4 and 6.60's @ 103 in the 1/8th, can you give me all your numbers from yesterday?

you know your combo just may want more fuel than we are use to, all are not the same and maybe I'm wrong about the jetting, if it runs better and harder with more jet then give it more JET and lets see what happens

[triplenickel]

bigd, i think you're getting a little out in left field here. Let me see if i can remeber the series of events here. Started out with what you thought to be 30 degrees of timing. wound up running high 6.50's to around 6.60 with 102 jets. Car slowed & you discovered timing to be way low. Put timing up to 35 degrees and it came back to mid 6.70's with a myriad of jet changes( which jets netted the best et is unclear to me). The fuel you were using was 77 to 80%. Now you have 85%. went from 103 to 105 jets & picked up considerably. What i'm taking from all of this is that more timing & higher E% is needing more fuel. 102's were good with 77 to 80% mix along with 30 degrees of timing. Now, at 85% mix & 35 degrees ( or is it 38) there is a lean condition, hence the better performance with 105's. As far as the plugs, the base ring (place where ground strap attaches to plug) shouldn't be white all the way around. This indicates lean. White should be approx. 3/4 of the way around with the blue line into the bend on the ground strap. On top of all of that, we have transitioned from nice early spring weather to less desirable late spring on the verge of summer weather. As Bean said, continue to jet up until it slows down to find how much it wants. You may even try less timing just to know what it likes. Just try one thing at a time. Hope this helps.