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It's time to start making some changes.....

This holiday I was able to modify a XJ leaf and add it to the rear spring pack due to all of the crap(weight) I have behind my rear axle which really beat on the springs. I already changed the rear springs to the RE1451 springs which had the higher spring rate but in reality it just wasn't enough. SO now that the packs are together, I gained back about 1.75" that I had lost. While I was at it, I did notice the mil wrap spring has been rubbing on the spring hanger on the inside. Anybody else ever notice that? I plan to link up the tail anyhow so it's not a big deal to me but just wanted others to keep an eye out for it in case they had weird vibrations from the chassis.

On a side note, I did get to take the Jeep home yesterday. I now have about 40 miles on the set-up now. With my 35's and 4.10 gears, I really feel the need to go deeper with my gears now with a 5.13 or 5.38. I really don't mind having the low RPM at 65 but I really don't want a possible top speed of 140mph either. Going 50mph, I'm cruising at about 1650rpm. Great for mileage but not for performance. One other issue I ran into with the 4L80E is holding manual 1st gear. The ECU will over ride the manual 1st gear command and will shift to 2nd gear. In the EfiLive software, there apparently is a calibration map to fix this but unfortunately that is inaccessible at this time. So I'm going to need to talk with Hughes and make a valve body change so I can have manual 1st gear.....Note to self...... Other than that, the only other issue so far is the rear pinion needs to come up a bit. The engine/trans change moved back about 1.75" so my driveline angle is just out of tolerance now and has some vibration under load. Lol....Surely it's not because I'm standing in the throttle more...... Once I get all of this sorted out, I'll post up the pro street burnout......
 
Here are some pics....
 

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That XJ rear leaf...was it an add-a-leaf or a leaf from a stock spring pack? I need a temp fix for my sagging front RE springs.
 
After having about 100 miles on it now, I had to make a change to the exhaust. This thing sounds good at idle and cruise but if you ease into it beyond cruise any bit at all, it's stupid loud. I'm running 2.5" to the collector and a single 3" to the back using a 50 series Flowmaster. I ended up changing the Flowmaster to a Magnaflow hoping to tone it down a bit but really no huge change. Now I need to put a long resonator tube in so maybe I can knock some of this noise down a bit. It's funny how a motor change can screw with other things. The exhaust sounded really good with my other motor but this one not so much.
 
To lower my noise I installed 2 high flow cats. I have dual exhaust. Noise Went down alot and no performance issues. Sounds good.

Sent from my SPH-L900
 
That must have been on your car. On my Jeep there is no way I would be able to package in two high flow cats near the manifold. There's absolutely no room up there due to driveshaft clearance and the frame itself. If I if I move them towards the back, they will have a difficult time staying lit of to do really anything at all. You have to remember I'm running one single three inch sewer pipe all the way the back.
 
Can you describe your stupid loud? My sounds good at cruise and idle as well, but beyond cruise it's not just loud. The noise as been described as sounding like a massive vacuum cleaner :(
 
Mine to me is just obnoxious. I like some tone but just don't want everyone to look when you go from 25% cruise throttle to 35%. It's hard to leave a stoplight and not make a lot of noise.
 
mysunnshine said:
That must have been on your car. On my Jeep there is no way I would be able to package in two high flow cats near the manifold. There's absolutely no room up there due to driveshaft clearance and the frame itself. If I if I move them towards the back, they will have a difficult time staying lit of to do really anything at all. You have to remember I'm running one single three inch sewer pipe all the way the back.
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Acually the camaro doesn't have any cats.. my 7 has a v8 dual 2.5 short headers dumps into the round cats and flowmaster muffs. its tight but the cats are only about 15" long.and 5" round stainless I really didnt care about it they worked as Im flashed for no emissions. But the drone sound was killing me..

Sent from my SPH-L900
 
When I first put the 5.3L in my Scram, I was running 2.5" to the collector then 3" and a flowmaster 40 series. Same thing, sounded great at idle, but had a REALLY bad drone when above idle. My head almost exploded the first time I really drove it. I put in a Magnaflow. It was better but still a bit too loud. I then put in a small high flow cat in and it is great now. Still sounds awesome and no drone.
 
I'm going to get one of these ordered so maybe next weekend I can slap it in there and see how much it's going to change things.
VPE-1791.jpg
 
This weekend my project is to take out the stock rear seat and make some mounts for a pair of suspension seats for my two boys.
 

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I didn't get a damn thing done today. Kinda nice having the time away from the project. I did however get my new sticker installed. If you have younger kids you know what movie it's from.
 

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:thumbsup: love the changes you are making sunshine! Thanks for sharing them with us.
z
 
mysunnshine said:
I'm going to get one of these ordered so maybe next weekend I can slap it in there and see how much it's going to change things.
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Can't wait to hear how this turns out...Mine sounds great at idle but like a monster truck under full throttle. Horrible drone at cruise. 3" Thrush Welded, basically a sounds like a Flowmaster 40. My wife refuses to drive any distance because it gives her a headache. I was contemplating an electric cutout system and a super mellow muffler, plus a straight through, so I could have the best of both worlds...
 
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