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Here are some of the completed exhaust system pictures. Boostfed86 and I have some TIME in this setup, but it is NICE and surely 1 of a kind! Only have a couple more tweaks and the Torque Arm mount to go and we are FINISHED. I love the sound of the magnaflow muffler...
Oh yes. Here is the result of Friday night's testing. This is no WOT in 1st or 2nd. The engine is really starting to wake up now. Just have to get enough fuel in it to support the new power! 80 lb injectors are maxed
Last edited by NufNuffZ28; 10-31-2014 at 12:06 PM.
I do need to figure something out. Fuel pressure starts to waiver once the car gets hot. You can hear the pump change tones, so it seems to be starving for fuel. If you turn the car off and wait a little you can hear the pump quiet down. Currently running a Holley 12-1800.
It is perfect until it gets hot........ I have changed two fuel pumps, filters, bypassed the aeromotive voltage box, changed all lines up front, 2 completely different exhaust systems to get it away from the lines, etc.
I am thinking(hoping) it needs more vent. The previous owner has the factory feed line returning fuel now, so I'm assuming its dumping in the top of the tank. The only vent I know of is the gas cap(I drilled a few holes in it.... This stopped the gurgling sound after a long hot drive), but I don't remember where the factory vent goes and how it is vented. I would assume something pushing this much fuel would need a good sized vent!
Line size seems adequate as when the car is cool it does perfectly.... BUT its -10 to the pump, 1/2 to the front. rails are -6, return is the factory feed line. Again, its FINE when cold, so i don't see how size matters at this point anyway!
Well, I have been very slack on updates and sadly there have been a bunch of them!
I trapped almost 111, brought the car home and started prepping it for Fall Draggin Rights.
I changed out the front 17x7" wheels for some true skinnies(17x4) and radial front runners. The spokes on the 17x4 are much thinner than the 17x7s. Of course, they are much lighter as well. Love the look!
Fast forward to the day I was getting ready to load the car for Draggin' Rights. I ent out on the slicks and at WOT I got an instant Smoke screen. UGH! I knew it was bad as it was now smoking out of both breathers as well. I limped it to Advance Auto and got my wife to bring the truck and trailer. At this point I knew the last run at Roxboro where it went lean(as the fuel pressure wavered) had caused problems. I thought there was probably a hole in the piston. Got it home and started the tear down.
We were right
after some research(and a month wait) we have a shiny new replacement for her!
Luckily the cylinder was able to be cleaned with muriatic acid and came out well. After a hone it is more than acceptable to run
(Before hone)
For those interested in just how lean it was, here is the graph.
14.6/1 AFR, over 7100 RPM, and 26.6 lbs of boost. Note on this run, the meth was armed, but I later figured out that it was not spraying as the line was too high and not gravity feeding the pump to spray
Along with a new piston, fresh hone, new rings and bearings, HV oil pump, we are getting a custom spec'd cam and hoping to improve the 775 RWHP!
While the engine is out I will be doing a few upgrades, fixes, and of course appearance modifications!
1st thing I did was replace all of the broken and worn connectors.....
Dusty got the oil pump(and all the rest of the engine parts in) and modified the oil pump for the best performance and longevity....
This expansion plug is inserted into the oil pickup area of the pump to facilitate drilling if the bypass return hole. If this plug were to fall out, the pump would suck air and not pull the oil up the pickup and we would lose oil pressure!
The bottom plate is opened up and smoothed to help the oil flow smoothly into the pump
The pressure outlet of the pump is smoothed and blended
The pipe plug is inserted in place of the expansion plug
The components are coated with assembly line to aid in priming and reassembled!
Engine compartment and wiring all tidy now! Didn't have to do much touch up, but here is the main part I painted.
You can see the painted booster and brake lines better here. My daughter and I placed the snow on it. She is surely inside
Had a couple parts come in wrong, so waiting to get that corrected so Dusty and I can wrap up the engine. I am ready to get it back in and run it NA for break-in and fuel pump diagnosing.
Should have it running in March, but with how much we have going on, I'm probably not going to do the VA 1/2 mile event I was going to run at! Should be out and about soon though!
Man that sucks you went lean and destroyed a piston, that car is a monster! Do you have any idea what caused the fuel pump to do that? I surely would take a good look at the grounds to MS3 and to the pump and relays. Just err on side of caution until you figure out what happened because something made that pump act that way, maybe even a power surge or lack there of.
Thinking vent issue at this point. You can hear the change in the pump, so once fixed it should be easily audible.
I've tried 3 pumps, 2 filters, removed the Aermotive controller, all new lines to the injecters......... so, I will be very cautious...... Plus, I should have more power now
Ok sounds like a plan, sweet ride though. A lot of hard work went into your build and I hate to see you hurt the fresh rebuild because of an electrical issue with the pump and/or due to MS.
Do you remember ZZ3Astro from TGO? He had a very similar issues with his car and he is also using MS. He tried all kinds of pumps just to do the same thing. The pump would start to act crazy, causing a lean condition after driving around beating on it for awhile.
10-27-2014, 01:12 PM
