u bend delete
- Thread starter twich12
- Start date
dpzelenak
New member
Milzy Motorsports - American Muscle, Reborn under exhaust section last on the list
have to get a new dp or make or get one made for you
have to get a new dp or make or get one made for you
I have the u bend delete and a magnaflow cat back dual exhaust that I put on my single exhaust 3.1 2001 GP. It made a hugh difference in the power from the 3.1. i have had a 3.8 1998 GP, a 2004 Impala LS with the 3.8 (single exhaust), and my Dad's Buick LeSabre 3.8 with single exhaust. The 3.1 with the magnaflow duals and the u bend delete now has the power of the aforementioned 3.8's with the single exhaust! The 3.1 is a great motor that delivers excellent highway and combined fuel economy. Don't listen to the 3.1 nay sayers.
dwarmbrodt
New member
I just did the u bend delete in combination with upgrading to a 56mm throttle body. I am very happy with the results.
dpzelenak
New member
very nice, im doing trhe same thing at the end of the month
just an fyi, im at 107k and an 9 year old car and still all stock gaskets, of corse with all the perventative mantence, so in my experience has long as you take care of them then you dont have to worry about that all to much
Nope!
The 3.8's and the 3.1's both have the same incidence of LIM and head gasket issues, the 3.1 is not any worse than the 3.8! As noted above, as long as you take care of the 3.1 motor, it's longevity is the same as the 3.8. Dexcool coolant is the suspected culprit for both motors and as long as you replace the Dexcool with the regular "green" antifreeze, these motors are bullet proof-both of them!
I have 120,000 miles on 3.1 2001 GP and I replaced the dexcool at 60,000 miles-zero issues with either the LIM or the head gaskets! Have a neighbor with a 3.1 with over 200,000 miles on his 3.1-zero issues. Mechanic friend that routinely works on GM 3.8/3.1's states emphatically that the LIM/head gasket issues with the V6's is the same for both motors-he has done many on cars with dexcool and almost none on cars with green antifreeze as long as the Dexcool was replaced at fairly low mileage.
The 3.1 is a great motor as is the 3.8 but the constant bashing of the 3.1 is just NOT true or warranted. I actually prefer the 3.1 over the previous three 3.8 V6 cars that I have had since my slightly modified 3.1 has the same power now (real world driving, not dynoed!) as the stock 3.8's that I owned with slightly better highway fuel economy and significantly better around town fuel economy.
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Grimsin
New member
i have a 05 impala LS, it had single exhaust, i got dual exhaust from 2008 Impala SS with a 5,3l. i always thought dual exhaust was just for looks, your telling me i gained some horse power? good to know!
seems like their is actually a group on here that cares for the 3.1l! yay!!! i plan on getting a 3.8 a little down the road but for now my 2002 GP SE is doing fine and has some serious pep! heck i just beat a 3.8l v6 on the highway about half an hour ago... then again hes bone stock and i now have a ncie CAI, 56mm TB, new exhaust, and am in the process of a tune (so far i just opened up the limiter and drew out the shifts a bit) i pulled ahead a bit at first and held it until he hit his speed limiter (i know he did because he stopped accelerating and i didn't), did it a couple times with the same result! i keep telling him to get a CAI, exhaust and a few other cheap upgrades but hes not nearly as into performance as anyone on here
it depends on the most restrictive point in your exhaust (IE if point A is further up the pipe than be then if only so much air can go through point A then increasing the flow ability of point B won't help much if it isn't restrictive yet) but it most likely did help a bit
edit: sorry for double post, he posted the thing about the exhaust while i was typing out the other post
blueguy
The Blue One
No, there are plenty of people that care...it's just the rediculous claims I have seen that make me NOT want to give a damn...
This.
3100/3400's are notorious for top end problems.
3100/3400 motors have head gasket issues...in which the 3800's don't.
That's great...doesn't mean other people are so lucky...general maintence on ANY motor can make it run for a very long time...it isn't just the 3100.
Yeah, real world...toss it on a dyno and see that it probably makes a solid 20 wheel HP less than a 3800.
It is all about looks. However, IT IS DYNO proven, that any W-Body exhaust flows very well for stock...and anyone claiming power from a catback is crazy. People have actually dynoed and lost power from a catback...since the factory unit flows VERY well up to 350~FWHP. I'm not saying a catback can HURT really...but I wouldn't waste my money on more than a muffler to change the sound if that is what your going for.
seems like their is actually a group on here that cares for the 3.1l! yay!!! i plan on getting a 3.8 a little down the road but for now my 2002 GP SE is doing fine and has some serious pep! heck i just beat a 3.8l v6 on the highway about half an hour ago... then again hes bone stock and i now have a ncie CAI, 56mm TB, new exhaust, and am in the process of a tune (so far i just opened up the limiter and drew out the shifts a bit) i pulled ahead a bit at first and held it until he hit his speed limiter (i know he did because he stopped accelerating and i didn't), did it a couple times with the same result! i keep telling him to get a CAI, exhaust and a few other cheap upgrades but hes not nearly as into performance as anyone on here
Noted.
But.
You do realize stock 3800's knock even in N/A form from the factory correct? Which means pulled timing...and possibly even making less power than your car...sure...especially if yours is in good shape. I'd be willing to bet my custom tuned N/A 3800 with NO knock on the junk 91 I run in it everyday would put a hurtin' on any 3100 car on this forum.
Here ya go...don't waste your money on a "dual exhaust"...really. If I had a 3100...
I'd top swap it...3400/3500 Top End, Ported Throttle Body, Custom Tuned PCM, Milzy's PEM's, 3" Catless DP, TransGo Shift Kit, P&P'd heads with Milzy's Stage 2 Cam.
I'd be willing to bet it'd get close to 200 WHP and run with a Full Bolt-Ons 3800's car...but then your at the point to where the 3800 has spent less than a grand and your a couple grand into yours...which at this point I would have just snailed the damn thing to begin with...like the 3400 Grand Am guys have...and make some pretty decent power.
Honestly...just take it to your local exhaust shop and toss it up on the lift and have them cut it out...along with your cat...because emissions are lame.
Lastly...just for S&G's...I'd like to see you 3100 guys get to the track and get some times. Just to see how they compare to the 3800. That way there isn't anymore of this "3100 hate" crap going around.
dpzelenak
New member
i agree with most of what your sayin, but not the last part, if you have/build a 3100/3400 its not going to be so you can drag it as least not in a w-body,
ppl that bulid up these motor could care less about takeing it to the strip,
mine and couple others i know are for the street, not racing for light to light(nothing stupid like that) just having a nice quick little grocery getter is all there really for a good DD that has some balls and gets good mpg's at the same time,
yeah you can get high 20s with a 3800 but thats if you baby it, im getting low 30s and thats at cruising at 80mph and med acc.
so ill take my 170 hp dd all day long getting good gas mileage and still being able to beat other cars on the road..
idk about you others but thats just fine with me
ppl that bulid up these motor could care less about takeing it to the strip,
mine and couple others i know are for the street, not racing for light to light(nothing stupid like that) just having a nice quick little grocery getter is all there really for a good DD that has some balls and gets good mpg's at the same time,
yeah you can get high 20s with a 3800 but thats if you baby it, im getting low 30s and thats at cruising at 80mph and med acc.
so ill take my 170 hp dd all day long getting good gas mileage and still being able to beat other cars on the road..
idk about you others but thats just fine with me
Grimsin
New member
sorry i wasnt clear, but my impala has a 3800, the reason i want plog and downpipe is cause i want to turbo when i get all the bolt ons. but i heard i cant run headers with a turbo...correct?
Grimsin
New member
not to sure on my MPG but i get 7500800 km on a full tank ALL highway @ 110-120km/h, not to sure city what i get in the city.