The 24 Hours of Lemons Forums → Our Crappy Race → First-Ever Lemons Corvette... and we gave it zero BS laps!
I'm on the vette team - weekend was mostly a failure for getting the car working but...
Failure? You won Organizer's Choice!
Thebadv8volvo wrote:2) Injection system only works at idle, under load it cuts out, sputters, and has pressure drops
Seems like something is clogged? If you're using a fuel cell do you have fuel cell foam? And if so do you have any kind of screen or filter before your fuel pump? My understanding (from the Great Pendejo) is that most OEM type high pressure fuel pumps will fail VERY quickly due to tiny bits of fuel cell foam unless there is an appropriate filter or screen in place.
sounds like it's working just as GM designed it.
failure?
dude you guys are my hero's of the weekend!
sort it and bring it back with or without FI!
Tim
Is the pump mounted in the fuel cell? If you use the in-tank immersion pump externally it won't work because it must push, not pull and it needs fuel immersion for cooling..
check ALL the grounds on the elec system. then replace the power supply to the pump. i'm thinking you have a cracked wired somewhere......
Mostly a failure - winning organizers choice made the weekend! Although it may be best spent on cancer treatment after snorting fuel-lines...
We've used in tank and in-line pumps - no dice. Ground has been changed, seems solid. It seems a different intermittent issue; sometimes it runs fine at WOT, and another lap I literally paraded around Phoenix at idle. I'm pretty sure the tow-truck lap was quickest.
We'll be back for sure - its just a question of getting EFI sorted or Carb.
Just run a hot wire to the fuel pump with a saftey shut-off toggle switch on it. That will eliminate all the bs involved with the electric fuel pump. We do it on the injected derby cars.
Do you really want to keep the fuel injection? I'm no Corvette expert, but I can't imagine any power increase that a quarter-century-old electronic injection system might provide that would make it worth fixing rather than replacing with a swap-meet four-barrel. Or two of them, on a grimy junkyard tunnel-ram sticking through the hood. Even if you lose a few horses, I'd assume that the reliability gains would make it all worthwhile.
Of course, I only say that because I'm a hack mechanic and I'm afraid of all this newfangled fuel injection stuff. You might be better at this than I am-- you're certainly a hell of a lot braver.
I give a nod for the carb(s) as well.
KT
Seems the fuel pump worked long enough to reveal some other issues.
Junkyards are overflowing with Chevy and GMC trucks equipped with perfectly functional Q-Jets on cast-iron intakes, though (given the 79-cent residual value Jay will probably give the Corvette) the TrannyLumberjacks should be able to afford some super-redneck Edelbrock Performer/Holley 600 combo on Craigslist.
1985 cars have a mass air meter control module behind the passenger side dash. It powers it and heats the Mass air element to clean it and changes the signal so that the computer can read it. If its not working the car will only idle if it cranks.... Also fuel pressure? fuel return line?? I have the tuning software for the car, but its cheaper to buy an intake and a carb off a 80's camaro or trans am. Then go race. Remember if you change to a carb to change the fuel pump to a lower pressure model.
btw.. you are fighting a losing battle with the early TPi
http://www.corvetteactioncenter.com/kb/ … eplacement
+1 on the carb, but maybe rethink the dreaded Q-Jet...you don't need a spread-bore for racing, and you don't need to try to take apart that sumbitch in the pits... IMHO, best junkyard card is Ford 4160....which is a Holley without the high price...
just about anything would be better than c4 FI for Lemons... that nightmare system is truly heinous, with satan in. I'd rather run a single mikuni dirtbike carb than the stock FI.
+1 for holley
at least it was an 85...not the infamous "cease fire" crossfire injection the 84 had....but I also would put a carb on it...its just too easy and cheap not to do it
You guys are thinking too small. Sure, Holley is the way to go on the Corvette... four Holley two-barrels off early Ford Rangers, that is!
You guys are thinking too small. Sure, Holley is the way to go on the Corvette... four Holley two-barrels off early Ford Rangers, that is!
How about two Spica systems from a pair of Alfas?
MurileeMartin wrote:You guys are thinking too small. Sure, Holley is the way to go on the Corvette... four Holley two-barrels off early Ford Rangers, that is!
How about two Spica systems from a pair of Alfas?
Yes! All you need to do is find the the two guys left in the world who can tune them, both of whom died last year. Don't forget the extra drive belts!
Maybe 4 Hitachis from a 70s Toyota? There's gotta be some kind of Lemons appropriate carb choice here...
16+ moped carbs
I gotta go with Marvel-Schebler updrafts a la Minneapolis-Moline...
How about some S.U.'s or Strombergs?
The BING Type 48 "is the ideal carburation unit for equipment which has to operate reliably in all positions and attitudes (chain saws, brush cutters or else) which is subjected to particularly heavy vibrations" so that sounds about right for a Chevy, especially if you plan to be upside-down for extended periods:
http://www.bingpower.de/english/products/type48.html
I've had excellent luck with their Type 21/20/108 in my car.
you want to be true heros? get TWO bosch K-Jet mechanical systems from the 2.6 190Es and make it work on the SBC 
you want to be true heros? get TWO bosch K-Jet mechanical systems from the 2.6 190Es and make it work on the SBC
naw....a good 928 K jet will work......pretty cheap too.... I even have one for sale....complete with 4.5L V8 attached!!! Then can support well over 300hp too!!
Serj wrote:you want to be true heros? get TWO bosch K-Jet mechanical systems from the 2.6 190Es and make it work on the SBC
naw....a good 928 K jet will work......pretty cheap too.... I even have one for sale....complete with 4.5L V8 attached!!! Then can support well over 300hp too!!
haha, that would be interesting to see working. i dare the corvette dudes to dooo eiitt!
The 24 Hours of Lemons Forums → Our Crappy Race → First-Ever Lemons Corvette... and we gave it zero BS laps!