http://www.svtgalleries.net/gallery/data/500/226385.gifQuote:
Originally Posted by Silver_2000
Printable View
http://www.svtgalleries.net/gallery/data/500/226385.gifQuote:
Originally Posted by Silver_2000
Oh, you don't have to explain. I was just hoping we would have had 100% attendance for the class. I haven't raced this year, 1st time with my Gen 1, but I was hoping for a shot in the dark. I went out in first round, but didn't buy back in. Just wanted to give it a shot and also give the club an extra $15 to help pay for whatever the club needs. Just hope to have a bigger attendance next time.Quote:
Originally Posted by WA 2 FST
Later,
Justin
Bob and I had a blast meeting with everyone, really had fun at the event.. I am REALLY disappointed in how Hallsville has let that track go down hill... The best I managed all day was an 11.89 :mad: 6 runs, 3 smoking the tires and letting off... and 3 sorry ass slow 11s... 11.89 11.90 and 11.96... If the event is at another track next year, I will still attend, someone has to try and keep you Talon guys in line :d
I also had a great time meeting everyone and making the trip to Hallsville. It turn out to be a frustrating day for me racing, but I really appreciate everyones help.
I had high expectations of barely getting into the 12's for the first time, but something went wrong with the Truck and just wouldn't go.
There are some great looking trucks that can go really fast out there... It was funny to see the ricers make a run after the L's went through. Seemed like they went in slow motion.
Also wanted to thank SixPipes and Silver2000 for their work in putting the event together.
Also, SixPipes, sorry I took off with the lug nut key... :)
I look forward to seeing everyone at the next event.
More pics added.
You did the right thing by not trying to push it at the track. We had several experienced guys there that couldn't figure out what the deal was either. Detonation is not something to mess with on a forced induction vehicle. I've already talked to Flats Man about it and we'll see what we can do about getting everything sorted out. :cool:Quote:
Originally Posted by Tobbun
Dennis and Trevor,
I'm actually very perplexed by what's going on with the truck. Let me ask you something about the boost gauge... does it read vacuum? Does it make boost (according to the gauge) and then you see it drop off? Or does it just never show boost on the gauge?
Mechanically we know there is no way for that thing to dump boost. None. Even a massive air leak (vacuum lines off, etc) at the manifold would not allow all the boost pressure to escape (been there, done that). The truck would also idle and drive poorly under part throttle conditions... and it doesn't from what you guys said.
If the gauge is reading vacuum, then we have to assume it is functioning properly. If so, then it may very well be a situation where the blower is screwed up again. I know it was just rebuilt. However, Powerdyne blowers are notorious for shredding their kevlar belts. That is not a gear-driven blower, like a Vortech or Paxton NOVI. You could still spin the main shaft and it would not be making any boost. Honestly, this makes some sense to me b/c the trap speeds were so low on the truck, compared to what it should be running. You're down 150hp easily (103mph to 88mph), and the only thing that makes that big of a difference on that truck is the blower.
This does not explain the detonation issue, however.
We discussed checking the in-line fuel pump. That would be mandatory, AND the truck might still ping at WOT even if the blower _isn't_ working... b/c the stock pumps are 10yrs old (we assume) and would be pushing through a dead pump (no problem at idle and part throttle).
The other thing that I noticed that bothered me is that it has 42lb injectors AND an FMU. This setup will certainly starve even the functioning in-line pump. You would need one of those huge Aeromotive pumps and aftermarket fuel lines (larger diameter) to be able to supply the fuel to the injectors at a given pressure over an entire run. I don't know how the FMU is calibrated, but really it is completely unnecessary at the power level you are at (would easily support 120mph in the truck). Since the MAF is calibrated for 42s an the truck runs fine under normal driving conditions, if it were me I would remove the FMU, taking it out of the equation as a potential faulty part. A boost referenced regulator mounted to the stock fuel rails would be the best way to go. It will spike the fuel pressure at a 1:1 ratio and that's all you'd need with those big injectors.
Just some thoughts. I've worked on those things (centrifugally blown EFI Fords) so long, I was disappointed I couldn't figure it out right on the spot.
Great suggestions Wes. We'll definitely check the blower belt (Flats Man agrees on that one). The weird thing is the detonation if the blower is not working. So we're probably talking about two different problems manifesting themselves at the same time, but each dependent of the other. Maybe we'll check the blower belt and remove the FMU and see what gives. :cool:
Dennis,
Understand that I'm referring to the kevlar belts inside the blower housing itself.
Thing is, even if it was detonating... the truck would have run faster than 88mph if the blower was working...unless you guys were just coasting down the track, which I don't believe you were.
It could get some detonation at WOT without the blower if 1) the inline pump is not functioning, or 2) the FMU is spiking the fuel pressure so high, that coupled with the large 42lb injectors, the fuel pump(s) are starving once you hit 2nd gear.
Hope its a quick, easy fix and not too much $$
But... but.. it'd've been FUN to see him spattering the wall with the blown blood vessel!! :evil: Gee whiz, Doug, yer ALWAYS killin' our fun!! :flaming:Quote:
Originally Posted by Silver_2000
:tu:
Congratulations on a great turnout and a lot of nice L's. TALON and Dennis did a great job with this event. I had a great time visiting, but wish I had more time to chat with everyone and meet more of the people I did not know. I was in area visiting family and therefore needed to leave track early.
I was surprised to see the two late model Chevy trucks running so well. One was running low-mid 12's and the other low 13's. Must have had lots of spray. Whatever it was, they were running suprising well.
I was having trouble with my truck and withdrew early. Motor was not running right and tranny shifting early. Thought I had fried some plugs on my first pass, and no sure why tranny was shifting early. I was not sure what was wrong and I was scared to flog it further; I did not want to walk home!
Turns out I got a few gallons of bad gas on the way to track and a second BIG dose at same pump before heading home Apparantly a lot of water was in the gas; trouble went away when I finished that tank and refilled. Not sure why tranny was shifting early, but it seems better now, chip may have not been making good contact or it may hve been the water. AFR meter was pegged until I got new fuel.
_________________
The one in the 12s had twin-turbos, I believe.Quote:
Originally Posted by BigBobsL
Hey Wes,
Thank you so much for your valuable input and I think you are probably right on. I thought it strange that when I put the 42's in the truck that I was told to leave the FMU in place especially with the Pro-M Mass Air. The tank that we were running on was the forward tank which has a new 255 lph pump and the one on the frame rail is a new 255 Walbro. I am thinking the one in the tank my be dead because of some install issues I had with it here in Florida. I think the FMU will dissappear as per your suggestions. The boost gauge shows vacuum and not just positive boost. I think the little Powerdyne is a great little blower for playing around on the street but I am not impressed with it for racing!! Me and Dennis and Trevor are discussing some major changes to Bluto in the near future and as soon as I have my Ducks in a row, I will let everyone know. I will be flying out there toward the end of the month to sort a few things out and to probably take the blower off and send it back for another rebuild. The FMU will be coming off as well. I will check to see that if the upper is turning, the lower should be as well! I will post what I find! Thanks again!
I actually like the way the PD blower is run compared to the Vortech I had. The Vortech utilizes the water pump pulley (they supply one that is much thicker, as in out towards the fan shroud) as an extra tensioner for the long, long belt that is run. This puts more stress on the water pump bearings, and certainly will lead to premature failure.
If the gauge is showing vacuum, but not boost, then I strongly suspect the internal kevlar belt(s) in the blower housing itself are shot. If the blower was operating properly, it would certainly be making some boost.
With those nice aluminum heads on there, it should be able to make 8-9psi with no issues regarding detonation, as long as timing is on spot, and the fuel supply is there.
A Walbro 255lph pump should be plenty to supply the potential power out of that combo. You guys will have it in the 12s in no time, I'm sure.
didnt that turbo silverado run an 11.8 or 11.9