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4 minute(s) of a 128 minute read
12-17-2009
I little more than 700 rwhp maybe?
It's been 9.57@142 with a 1.35 60' at about 3800 lbs at 15psi.
So after what seemed like forever, it finally stopped raining and we had a PERFECT South Florida day. Clear skys and dense cool air. I never did completely resolve the hot fuel problem. It seems that the general concensus has been that the -6 return line that I am using is a big contributor to the problem. I was originally using the stock feed line as the return but was concerned with it's proximity to the down pipe. I then bought a long piece of pushlock and ran that back to the tank. On the first hot day after some extended driving, pump shut off on me again. So that wasn't it. I was going to run a -8 but that would have required atleast 6 more fittings and the new section of hose. Easy $150 dollars. I decided instead to buy a -6 "T" and re-plumb in the stock feed line as I already had all the fittings with the exception of one push lock and the "T". Basically doubled the size of the return. Did alot of driving and never had an issue yesterday. Then again, it was cold out. If this doesn't fix it, I may have to do a fuelcooler.
On to the wastegate and boost controller. I put the softest spring in the gate for best boost control. On the old gate, I could only hold the car down to 12 psi on the long end with just the spring. Now, the gate starts to open at like 3 psi and would probably struggle to get to 7. Because the old gate was such a POS, I had 18 psi on the back of the wastegate with the CO2 to make an oscillating boost of 14-16 psi. In theory with the way that this boost controller works, whatever co2 pressure that you put on top of the wastegate + the boost level that you get on "spring only" should yield desired boost. Using this math I should have gotten 28 psi but was only peaking at 16. This math rarely works out perfect (there are several other variables)but should be much much closer than what I was seeing. Enter the new JGS wastegate. I hadn't had a chance to test it with the CO2 yet due to the aforementioned weather and a couple of failed attempts at getting the CO2 filled (the place was closed the first time and out of co2 the second time). I left everything set exactly the same in the controller. Took it out and stood on it from a 35 mph roll. Flashed the converter, boost kicked in and instantly boiled the tires. Boost level unknown. Got up to about 55 mph (3500 RPM in second gear) and the same thing happened. Keep in mind that I could hit a 380 shot (no delay or ramp) from a 2nd gear roll. Still unable to see where boost is at. I'll be turning it down today but the wastegate works awesome!
Hope to be at the track Wednesday night to backup my findings.
3-6-2010
Last time out I managed to run a 9.18 @ 149 and hit the limiter just a hair past the finish line. So it was time for gears as the 3.73 gear, converter, 28" tire, and 7300RPM redline setup was maxed out. Because I run the Strange S60 rear end, my gear choices are extremely restricted. Basically the next and closest ratio available is the 3.54:1 gear. This is something that anyone looking at this rear end should consider. The upside is that this big bastard hooks retarded. Anyway, now the rear cover is leaking pretty bad so I am going to take it back and have a stock Dana 60 stamped steel cover put on in favor of the current chrome POS. Hope to have the 8 sec slip by the end of this week.