LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

I drove her with no Y-pipe!!!!

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Old Apr 26, 2003 | 05:00 PM
  #1  
scoobysnax83's Avatar
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I drove her with no Y-pipe!!!!

If you don't want to read the questions at the bottom:

about 9:30 this morning I go over to the military auto hobby shop to do some work on the Z. I changed the tranny fluid first. Then it was off to the shatty exhaust manifolds to do the gaskets (freakin PITA) I just found it to be easier to remove the y-pipe. Plus I was/still going to, gut my CAT. So I get the driver's side which wasn't too hard. Then I get a brilliant idea to remove the useless heat shield and sandblast it to see what it would look like. Actually looked pretty good. But I got way too carried away lost track of time (its about 2:30ish shop closes at 4:30) I decided that since the first one took only like an hour and half or so to go ahead and do the other one. Big mistake two hours later and a y-pipe and 2 bolts short (gasket bolts) I get kicked out for closing.

I had no choice but to drive it home about 1.5 miles. Needless to say it was LOUD!!! Kinda sounded cool. But I never let it get over about 1500 rpms the whole time I was afraid of what it might do to the engine. My question is....One oxygen sensor is plugged into the y-pipe so that one wasn't there and no back pressure at all. Why did my computer not throw an SES light? I know it works cause the SES comes on when I disconnect my MAF and run it. Do you think I caused any harm to my engine. I'm gonna pull the half done manifold gasket and replace it. What do you think any damage?

Last edited by scoobysnax83; Apr 26, 2003 at 05:06 PM.
Old Apr 26, 2003 | 05:13 PM
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Re: I drove her with no Y-pipe!!!!

Luckily didn't start a fire.. I know how it feels to be pressed for time in those military things..
Old Apr 26, 2003 | 05:20 PM
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what do you mean cause a fire? Do you think it could have? And why?

I still haev to drive it back over there to finish the work
Old Apr 26, 2003 | 05:26 PM
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figure avg egt's are about 700*c or so.. right? per side? maybe.. its pretty damned hot.. i'd say take it easy on the way back over there.. nothing is controlling where all that hot exhaust goes.. just be careful.. Sounds cool though don't it?
Old Apr 26, 2003 | 05:29 PM
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Through that thing in first roll that clutch and hammer it down!!! Dont be scared, you gotta hear that thing scream off the rev limiter and slam second, come on man do it for me!!!
Old Apr 26, 2003 | 05:30 PM
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Well yea everyone should experiance that.. Once .. just watch your feet..
Old Apr 26, 2003 | 05:52 PM
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if it won't hurt it then I'll do it, but a few more people have to convince me first. Come on guys convince me, but please don't lie, I don't need problems...
Old Apr 26, 2003 | 05:55 PM
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y didn't you just put some headers on? after going through all that work?/ just wondering.. you need convincing? Go for it..just don't forget your fire extinguisher..
Old Apr 26, 2003 | 06:02 PM
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well....if I had an extra $600 bucks for headers then I would have, but I didn't so $23.54 for gaskets will have to do for now. Actually its gonna be $47.08 now, Don't worry I'm puttin some headers on soon. I'm getting ready to go home on leave. Its about a 1,100 mile trip each way, so I wanted to replace the gaskets and completely seal the engine's air leaks (if any), so I can get a good idea of the gas mileage on the highway. It should be pretty good since its an M6 By the way, I'll get on my baby tomorrow and be sure to post the outcome.

Last edited by scoobysnax83; Apr 26, 2003 at 06:06 PM.
Old Apr 26, 2003 | 06:10 PM
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Hah, I did that at the hobby shop too in Germany in my 5.0 LX. OPen shorty headers, melted my damn speedo cable, on top of getting pulled ovre by the SP's
Old Apr 26, 2003 | 06:46 PM
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When we were working on mine, my friend and I took it out for a spin or 2 and gutted the b*tch. Quite loud, but everyone needs a NASCAR experience in their life. We had to try out the new line lock and my MAC ORP had not arrived yet (BTW I did have the y-pipe on, just not anything connecting it to the exhaust).

PS: I have MAC headers 2.
Old Apr 26, 2003 | 06:53 PM
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drive it loud, PLEEEEEEEEEEEEEEEEEEEEEEASE!! do it for all of us folk who have to use shorty headers!!
Old Apr 26, 2003 | 07:33 PM
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we dont have any shops to rent out like that in jersey ='( i feel deprived...... here you gotta kno someone with a lift....or jus jack away on cinder blox an stands (veryyyyyyyy time consuming)
Old Apr 26, 2003 | 07:56 PM
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yeah it can be very time consuming when you're got people hovering over you asking, "How much horsepower does it make?" It makes me feel quilty to think that my baby's almost bone stock
Old Apr 26, 2003 | 08:01 PM
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BLOW IT OUT!ALL THE WAY OUT!



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