koolrayz Posted September 11, 2008 Report Share Posted September 11, 2008 Went to 42 last night. First pass blew the tires off, Second pass I pulled the nitrous way back, still spun a little but cut a 1.42 60' The 1/8 was ok down about 1 mph then it layed down hard on the big end, only trapped 135. It didnt show lean on the logs. Next pass it goes lean and detonates HARD. It appears the fuel pump layed down on me, I changed the pump but I cant try it until I get some more plugs they will be here tomorow. I cant believe that there are no signs that I pushed any water. How the heads didnt lift I will never now. Cometics FTW. I wont know for sure until I lean on it again but every other time I lifted a head I new right away. I never heard it detonate like that before. Funny part is it idled fine with the plugs toasted. Sorry the pics a little blurry. http://i212.photobucket.com/albums/cc122/koolrayz/DSC02872.jpg Quote Link to comment Share on other sites More sharing options...
Cordell Posted September 11, 2008 Report Share Posted September 11, 2008 How long have those plugs been in there? Sorry to hear about that, but that's racing. Lets just hope thats all that happened. Quote Link to comment Share on other sites More sharing options...
kenny Posted September 11, 2008 Report Share Posted September 11, 2008 Buick guys have been lifting heads so often running Cometics now that someone has made a head clamp kit. What fuel pump is in it? There have been a LOT of Walbro failures as of late. Quote Link to comment Share on other sites More sharing options...
Cordell Posted September 11, 2008 Report Share Posted September 11, 2008 What fuel pump is in it? There have been a LOT of Walbro failures as of late. Lets hope not I just installed a Ractronix Walbro yesterday. Quote Link to comment Share on other sites More sharing options...
kenny Posted September 11, 2008 Report Share Posted September 11, 2008 Lets hope not I just installed a Ractronix Walbro yesterday. I'm in the same boat I bought one from there a few months ago. The new ones are the ones that have been failing. Keep an eye on it. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted September 11, 2008 Report Share Posted September 11, 2008 that not Detonation http://i5.photobucket.com/albums/y196/gearhead559/piston1.jpg thats Detonation Quote Link to comment Share on other sites More sharing options...
kenny Posted September 11, 2008 Report Share Posted September 11, 2008 no dude, that's weight reduction Quote Link to comment Share on other sites More sharing options...
V8 Beast Posted September 11, 2008 Report Share Posted September 11, 2008 no dude, that's weight reduction LOL!!!!!!!!!!!!! Quote Link to comment Share on other sites More sharing options...
MrMeanGreen Posted September 11, 2008 Report Share Posted September 11, 2008 I've been running dual Walbros (340m and 342s) that are about a year or so old without issues. Kenny, what's the time frame for "as of late"? Quote Link to comment Share on other sites More sharing options...
SinisterSS Posted September 11, 2008 Report Share Posted September 11, 2008 my new walbro pump sucks, so I removed it and I bought a new complete Delphi sending unit and everything is working fine Quote Link to comment Share on other sites More sharing options...
kenny Posted September 11, 2008 Report Share Posted September 11, 2008 I've been running dual Walbros (340m and 342s) that are about a year or so old without issues. Kenny, what's the time frame for "as of late"? Most of it started around May, but I have no idea on manufactured date for the pumps. Most of the people that have been having issues have had them die in a matter of months, or less. I've ran Walbros in everything I've ever had and never had a problem, so who knows. I haven't fully read the thread as I don't really want to know if the pump I just installed is going to give me nightmares or not. Most of the pumps in question are 340s. Edit: Also, a few people seem to think the problem is a grounding issue. Racetronix and other vendors recommend a ground strap from the tank to the frame. I haven't seen anything whether or not the people having failures have done this or not. Just food for thought. Quote Link to comment Share on other sites More sharing options...
MrMeanGreen Posted September 11, 2008 Report Share Posted September 11, 2008 I've been beating the piss outta mine for a year, and have a grounding and hotwire kit for them. Guess it's cool on my end. Quote Link to comment Share on other sites More sharing options...
kenny Posted September 11, 2008 Report Share Posted September 11, 2008 To me it seems to be a voltage/grounding problem. As long as you've got a better ground than stock I wouldn't worry about it (ie: more than the wiring that goes into the tank, an external ground from the tank to the frame). Or at least that's what I'm telling myself until mine fails. Quote Link to comment Share on other sites More sharing options...
Zach1647545520 Posted September 11, 2008 Report Share Posted September 11, 2008 my new walbro pump sucks, so I removed it and I bought a new complete Delphi sending unit and everything is working fine He speaks truth. I know a few people now who have installed a walbro and having fuel issues. They then went out and bought a stock fuel pump and issues resolved. Quote Link to comment Share on other sites More sharing options...
schmuckingham Posted September 11, 2008 Report Share Posted September 11, 2008 Lightning guys have a huge issue with eating plugs like that but not lifting a head and it idles fine after it happens. Last time i was at D42 same thing happened to me and i drove the truck home no problem. http://img.photobucket.com/albums/v226/Schmuckingham/SVT/Picture004.jpg Quote Link to comment Share on other sites More sharing options...
kenny Posted September 11, 2008 Report Share Posted September 11, 2008 That looks 100% normal. Quote Link to comment Share on other sites More sharing options...
dragknee66 Posted September 11, 2008 Report Share Posted September 11, 2008 I did that to a dsm once, and took out a valve, doh. Quote Link to comment Share on other sites More sharing options...
2highpsi Posted September 11, 2008 Report Share Posted September 11, 2008 I have heard that the Walbros do not like E85. In fact for a time if you had a Walbro that ran with E85 that didn't fail they would give you two new pumps so they could check out yours...... Quote Link to comment Share on other sites More sharing options...
koolrayz Posted September 11, 2008 Author Report Share Posted September 11, 2008 those plugs were changed right before I went to the track. That pump was 2 years old and its the newer 342 style Quote Link to comment Share on other sites More sharing options...
GonneVille Posted September 11, 2008 Report Share Posted September 11, 2008 Be aware that lately, there have been a LOT of shops and eBayers selling crap-ass Chinese Walbro knock-offs. They are hard to tell from the real thing, the most reliable way to tell is that the knock-offs GENERALLY have a dull finish to the metal body of the pump. The real deals are nice and shiny stainless. Quote Link to comment Share on other sites More sharing options...
kenny Posted September 11, 2008 Report Share Posted September 11, 2008 The ones in question aren't Chinese. That was the first thing that was brought up. Quote Link to comment Share on other sites More sharing options...
Main3s Posted September 12, 2008 Report Share Posted September 12, 2008 Did the same thing here, racing an Audi RS4 at 130 mph... http://i49.photobucket.com/albums/f279/cmaines01/plug.jpg http://i49.photobucket.com/albums/f279/cmaines01/plug2.jpg Saw 16* of knock on my scanner, then the check engine light came on. Multiple cylinder misfire. LOL, luckily there was no damage to the heads, pistons or valves. I hope the same goes for you! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.