Engine/Transmission (1998.5 - 2002) 4" Jardine give poor performance....why?

[K_Arts]

Ok Guys. Cryppie came over and helped out out this weekend, he had a sawzall so we cut out the stock pipe.



After taking the truck for a drive with the 4" pipe... here's my impressing.

I am not pleased with this 4" exhaust, It was a total waste of money!!!



Right off hand I noticed that I lost 3 lbs of boost and gained 100 degrees EGT, it took a lot of power away from the bottom end (I can't even lay rubber anymore... not that I did it all the time or anything). Another dissapointment is that it increased my turbo lag like you wouldn't believe.



Whats the deal? Cryppie and I verified that everything is tight... and there are no leaks... .



I am really considering putting a 3" pipe back on. What gives guys???



I understand that my engine is breathing better now... but enough to make my power dissappear and make my temps go up??? I'm confused. What can I do to get my power back?



Thanks



Kev

 

[R.ebel]

4" exhaust

K_Arts,There has to be something else wrong with your truck. On my '97 the 4" installation lowered egt's and let the turbo spool up faster. Didn't notice any change in peak boost levels.



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[drawson]

I did notice a small lose in preturbo torque but my EGTs are lower on the freeway and although I can max out the gauge still it take longer at full throttle.



I got back what I lost by adjusting the AFC 5 clicks looser.

 

[K_Arts]

I dunno... I'm just not liking this. I went from 30 lbs of boost... and 1000 degrees preturbo... to only being able to hit 27 lbs of boost and 1100 degrees.



Before the exhaust, I had to struggle to hit 1000, and now I hit the throttle. . and whoola... 1100 degress. I'm totally confused as to why.



Is it the backpressure from the 3" that got my turbo spinning quicker and kept it spinning faster to keep my temps down, and why would I lose 3 lbs of boost?



The downpipe is a 3 to 4 inch. . so you would think that the pressure at the turbo would be the same... or am I completely off?



Thanks



Kev

 

[Archive]

Kev. . I can not ever remember reading a post saying this before. The bit of slower spoolup kind of makes sense cause one of the reasons to go to 4" is to let it breathe better so more fuel will not heat ya up. You didn't add more fuel than before, so it may spool up a small bit slower. The fact that your temps went up is strange. Several people I know have the Jardine system and have not mentioned anything like this to me.



I don't know what to tell ya... if it was me, I would tear it back off, check everything out, and re-install.



Have you emailed or called Jardine? They may have some answers. Please let us know what the outcome is.

 

[Cooker]

I'd sat that maybe the muffler is clogged. Perhaps it was junk from the start??? Just a thought.



-Ryan

 

[JJW_ND]

Different ambient conditions!

I am sure you took this into consideration and if so, sorry to mentions it.



I have seen wide ranges in boost numbers and EGTS depending how cool or hot it is outside. Several hundered degrees EGT swings and several pounds of boost. Same truck, nothing ever touched just a cool (40 - 60 dergree), cloudy, high humidity day vs. a hot (90 - 100), dry, and sunny day.



We finally got some hot weather and I seen lots more smoke that did not I did not see before (just added #11 plate).



jjw

ND

 

[K_Arts]

I have noticed now that the weather is getting warm here that I am smoking a lot more then normal, but my boost and EGT numbers have been pretty much the same throughout the weather changes with my stock 3" pipe on.



I have tried to call Jardine, but Jerry hasn't been available. I talked with some guy there that was really nice, but he told me that my problem can not be caused by the exhaust... I find that hard to believe. Cause why did this power fluxuation happen right after I put on the exhaust???? I don't understand.



I'll let you guys know what I find out



Kev

 

[Bad340fish]

Bypass

Unhook the exhaust before the muffler and see if it picks up any performance. I don't see how a larger exhaust could cause problems

Clark

 

[work2muchplay2little]

Kev, I'm in agreement with most of the other posts here suggesting a restriction. I'd check the muffler first, then the other pipe connections looking for a defect or crush damage, then I'd look at the intake side for restriction (ie. shop rag) or for loose intercooler connections. Good luck, no fun when a new BOMB "backfires"

 

[Big MAK]

Housekeeping: Moving to Engine/Drivetrain.



K_Arts: I concur with others... your results are unique and unsuspected. Somethings wrong somewhere or there's another variable thrown into the mix from someplace that you and we remotely don't know about. There should be no impact on max boost or possibly a little more max boost and temps should be down some. The insight about weather is a good one -- now that it's hot outside my max boost is down 4lbs from a max of 38 to 34 when hot and humid. To get it to hit 38 when hot and humid I have to hook to a trailer and shoot for a record 0-60 time (it'll still hit it but only under duress -- WOT w/o a siginificant load will only make 34).

 

[JohnE]

Kev;



My immediate thought is that you left something off or left something in or added something that didn't belong in the first place.



Try clamping the turbo feedback line near the wastegate actuator or unhooking the exhaust.



OTH, you didn't replace the air filer on the same service call did you? Occasionally, we have very restricted air filters out of the box and must replace them. (Careful, your partner may soon learn the best way to stop the outputs (farting) is to choke the intake. )



Gotta run



John

 

[R.ebel]

Wastegate?

K_Arts, Lets see you have lower boost and higher egt's hmm, check to see that your wastegate is not partially stuck open. Its got to be something creating a restiction, on the intake side or exhaust side.

 

[ramfan2]

I ordered my Jardine system last week. Jerry said the turbo would definitely spool up faster and my EGT's would be lower. So I guess I do not need to tell you that something doesn't sound right. When I get mine installed, I'll post the results.



Chris

 

[HVAC]

Jardine Exhaust Systems

Kevin,



I don't have any suggestions for you except to backtrack and see if you can find the problem.

But I wanted to mention that Performance Diesel has installed many Jardine exhaust systems without problems. This is after some initial R & D of course. They are using a larger muffler now and the hangers are working better now then at first.

I would second the person that mentioned how hard it is to compare egt readings due to the lack of test cell conditions.



If experience counts for anything then I would like to wade in say that we have not seen the problems you have experienced. There is surely a logical explaination. Hope you get to the bottom of this.

 

[QRTRHRS]

I can't recall anyone ever having higher EGT's going to the 4" exhaust. Anyway, I did not pick up on anyone else mentioning this so I thought I would add my two cents worth. As far as performance gains going to 4", you won't see much. The 4" is the precurser to bigger injectors, larger turbo, etc. That is when the larger dia pipe shines.

 

[mopars1]

I talked to Jerry at Muncie and ordered my new 4" from him on June 10th and the system was shipped on the 22nd. I should have it by the end of this week. Once I install I will report back if I see any differences that normally aren't associated with the upgrade to the 4" system. I don't think the exhaust is going to cause your complaint unless it is in the muffler. Let us know what you find.

 

[K_Arts]

Ok guys, I backtracked everything last night. I unhooked the exhaust from head to toe and reinstalled it. There were no obstructions in the pipe at all... and I am having the exact same result. Included with the pipe was 3 clamps and like 4 hangers. everything is hung correctly and the 3 clamps are as follows. 1 on each side of the muffler and 1 connecting the end pipe together.



I took my truck around the block and have the same results. 27lbs of boost and 1100 degrees... and I still can't even break traction on my tires.



I guess the next questions is... where can I get a full replacement 3" exhaust? This Jardine system is being trashed!!!! ASAP



Thanks guys. .



Kev

 

[David Muench]

Have you consulted Jerry at all? My Jardine 4" is about 2 months old, and was nothing less than a 100% improvement. My truck's engine is stock otherwise plus a K&N in the stock filter box.

 

[Marco]

Hi Kev,

Just a thought, did you fill the tank rigth before you swapped the

exhaust? Could it be a bad load of fuel?



I have my complete used 3" system here. If shipping isn't too much tell me what you need! Drop me a line... .



Marco