C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Great, just great.....

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Old Jul 10, 2006 | 08:05 AM
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Default Great, just great.....

So, I finally have gotten all of the vacuum leaks taken care of, all the coolant leaks sealed off, shimmed the fuel rail, replaced a broken runner, and burped the radiator. Took the car out on Saturday and she ran nice and strong; blower sounds good (11 psi-wow, didn't expect quite that much!). I ran her for about 5 miles, not too hard, just right.

Yesterday I decide to run my stepson up to the movies to meet his girlfriend. Sure, let's take vette, she's running good after all......So, an hour and 40 minutes later the tow truck finally shows up to get me home. Turns out I blew a fuel line. Guess those 20 year old hoses don't like all this new found pressure. Should've known better I suppose. Looks like I'll be busy again this weekend!
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Old Jul 10, 2006 | 08:32 AM
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Originally Posted by silver86
So, I finally have gotten all of the vacuum leaks taken care of, all the coolant leaks sealed off, shimmed the fuel rail, replaced a broken runner, and burped the radiator. Took the car out on Saturday and she ran nice and strong; blower sounds good (11 psi-wow, didn't expect quite that much!). I ran her for about 5 miles, not too hard, just right.

Yesterday I decide to run my stepson up to the movies to meet his girlfriend. Sure, let's take vette, she's running good after all......So, an hour and 40 minutes later the tow truck finally shows up to get me home. Turns out I blew a fuel line. Guess those 20 year old hoses don't like all this new found pressure. Should've known better I suppose. Looks like I'll be busy again this weekend!
Hey, that's no big deal, at least you didn't throw a rod through the block. A fuel line is a relatively simple fix.
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Old Jul 10, 2006 | 09:40 AM
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Yeah...I just needed to vent a little.
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Old Jul 10, 2006 | 11:57 AM
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On a positive note, the car's running strong......and it didn't CATCH FIRE! lol
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Old Jul 10, 2006 | 01:14 PM
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Heh, heh....that would've been something! Glad I didn't get to see that! Oh well.....more ground time.
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Old Jul 10, 2006 | 01:54 PM
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Originally Posted by silver86
Turns out I blew a fuel line. Guess those 20 year old hoses don't like all this new found pressure. Should've known better I suppose. Looks like I'll be busy again this weekend!
What fuel line that is not metal has significant psi under boost (or at least significantly more psi than stock)?
Aaron
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Old Jul 10, 2006 | 02:11 PM
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At this point I'm just guessing since I haven't probed around underneath the vehicle, but the first place I'm going to look is from the fuel rail back to the fuel filter. When the car was being lifted onto the flat bed, the fuel came from that area. If anyone has any other ideas, I'm sure willing to listen.....
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Old Jul 10, 2006 | 02:36 PM
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hey man, hang in there, at least it's one less bug to worry about, and eventually there will be no bugs at all to iron out.
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Old Jul 10, 2006 | 11:42 PM
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Originally Posted by silver86
Heh, heh....that would've been something! Glad I didn't get to see that! Oh well.....more ground time.
You might consider putting a fire estinguisher in your vette... one big enough to do the job if needed... If you have every seen a burned out vette you will know what I am talking about.
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Old Jul 11, 2006 | 10:46 AM
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Originally Posted by silver86
At this point I'm just guessing since I haven't probed around underneath the vehicle, but the first place I'm going to look is from the fuel rail back to the fuel filter. When the car was being lifted onto the flat bed, the fuel came from that area. If anyone has any other ideas, I'm sure willing to listen.....
I think (going by memory) there is one short (maybe 18") piece of rubber line that that would be located between the engine and the chassis (under the AC compressor area near the cradle). Everything else is hard line until you get back to the fuel tank.

Aaron
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Old Jul 11, 2006 | 01:13 PM
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That's where I'll start (if I ever get the chance!). The largest puddle accumulated under, and just to the right of the cat. Of course, I guess the fuel filter may have issues now that I think about it at that location.....
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Old Jul 14, 2006 | 08:10 AM
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I found the leak. The rubber section of the fuel feed line under the A/C bracket took a dump. Naturally, I don't think there are factory parts available to replace this piece, and I don't have the crimping tools to do it anyway if they were. I'm looking at cutting the factory line and just before and after the hose section, and running new hi-pressure line in its place. Sounds reasonable to me, anyone else have anything better?

Thanks.
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Old Jul 14, 2006 | 09:00 AM
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Originally Posted by silver86
I found the leak. The rubber section of the fuel feed line under the A/C bracket took a dump. Naturally, I don't think there are factory parts available to replace this piece, and I don't have the crimping tools to do it anyway if they were. I'm looking at cutting the factory line and just before and after the hose section, and running new hi-pressure line in its place. Sounds reasonable to me, anyone else have anything better?

Thanks.
Good Idea. I did exactly that on my '85 years ago, when I accidentally messed up the threads on the stock fuelline into the fuelrail. I just ran high-pressure braided lines for both ports and never had any issues upto 60psi with a walbro Pump.

Good to hear it's running well though..
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Old Jul 21, 2006 | 10:19 PM
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Ok, I'm pretty frustrated with myself right now. Clearly my mind just isn't right at the moment because...well...because I can't help but wonder if your stepson made it to the girl.

Maybe it's because I'm young and can still remember how it is when you've got no ride...or maybe I suddenly turned into a woman and need to trade in the vette for a dress.

I'm just going to go with the first one.
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Old Jul 22, 2006 | 07:33 AM
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Default Earl's UltraFlex 650 Hose

Earl's has a new cloth Kevlar covered convoluted teflon hose that is very expensive but very nice, especially for all the newly formulated fuels. The #6 has a minimum bend radius of .787" (typical SS braided rubber hose a min. radius of 2.5") enabling it to make tight turns. Temperature range -94 degrees F to 500 degrees F. Operating pressure in excess of 1100 psig. Being teflon a #6 hose flows like a #10 rubber. It's extremely lightwork; 60% lighter than #6 SS braided.
It's easy to assemble and with a couple of adaptors you can run it from the top of the engine right back to the fuel filter & and the coupler on the return line with no cutting or crimping or any other 'Rube Goldberg' adaptations. It's only drawback is $ at around $22/foot !!! However it will outlast all of us. Regards Greg (No, I don't own stock in Earl's, but I like nice stuff.)
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Old Aug 9, 2006 | 11:23 PM
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with Greg , but I dont think $22 a foot is a lot of money when you see what your getting and your not talking hundreds. Your talking fuel lines. Fires When you spend good money on your car, dont get cheap on the important things that make a difference. When your really think about it , its like the cost of filling up the gas tank or two fills.
Regards

Last edited by bacardioil; Aug 9, 2006 at 11:48 PM.
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Old Aug 10, 2006 | 06:11 PM
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Originally Posted by ncider
Ok, I'm pretty frustrated with myself right now. Clearly my mind just isn't right at the moment because...well...because I can't help but wonder if your stepson made it to the girl.

Maybe it's because I'm young and can still remember how it is when you've got no ride...or maybe I suddenly turned into a woman and need to trade in the vette for a dress.

I'm just going to go with the first one.
He made it to the girl...and to the movie as well I suppose. My wife came and picked him up, and took great joy in giggling as she drove back by on her way home!!!
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Old Aug 10, 2006 | 06:16 PM
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Originally Posted by silver86
I found the leak.
For those of you that don't make it over to the tech area much (yeah, right), it ended up not being the fuel hose. The injector driver went bad on the ECM and dumped every bit of fuel that the pump could muster into the engine. I got my schooling in the wonders of hydro-locking, and came to find out that the fuel that I thought was leaking from the feed hose, was coming out of the header gaskets instead. That's what I get for continuing to crank her over and filling the crank case full of fuel (I'm sure it's quite spotless on there now!).

Oh well, now harm no fowl. She's up and running again, and I'm just trying to get everything set to dyno tune her.
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Old Aug 20, 2006 | 07:54 AM
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I would change the oil a few times to flush out the gas.
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