3.55 limited slip, worth it compared to stock?
4th Gear Member
Joined: Dec 2006
Posts: 1,209
From:
RE: 3.55 limited slip, worth it compared to stock?
ORIGINAL: KTownGT
Tuneless Cold Air Intake, it is a mod that adds 25 Rear Wheel Horse Power. The CAI costs $300 I think shipped and is the easiest thing to put on, you just need to know how to use a screw driver and you got it.
ORIGINAL: Mike521
ok that sounds good but what's a tuneless GMS CAI, and what does RHWP stand for?
how much does a tuneless GMS CAI go for, including installation?
ok that sounds good but what's a tuneless GMS CAI, and what does RHWP stand for?
how much does a tuneless GMS CAI go for, including installation?
I'd believe 10-15 HP, but 25 HP sounds a little exaggerated.
Back to the rear end question - I drove 2 GT's today in my decision to buy my '07 GT. The feel was there with the 3.55, but I didn't feel a huge difference between the two. I eventually went with the 3.31 rear end because 1) I didn't want to spend the extra $5k for the extra bells & whistles they had tacked on to the car (They kept trying to push this car with a dealer package of wheels, rally stripes, and some interior appearance add-ons that in all reality, only cost them $2500-$3k). It just didn't seem like all that much of a performance increase.
And, I'm more for overall speed and handling, rather than straight line performance, so the 3.31 was better for me.
poptart tits
Joined: Aug 2006
Posts: 2,886
From: Texas
RE: 3.55 limited slip, worth it compared to stock?
ORIGINAL: Sprzout
No offense, but 25 RWHP? That seems like an AWFUL lot for a CAI...I came from the "Import" crowd, I guess you'd say, as I used to own a 2002 Saturn SC2 (1.9L DOHC engine), and people used to boast figures like that all the time. Usually, you'd get an extra 25 HP if you did the CAI, and added a higher flowing exhaust/muffler.
I'd believe 10-15 HP, but 25 HP sounds a little exaggerated.
Back to the rear end question - I drove 2 GT's today in my decision to buy my '07 GT. The feel was there with the 3.55, but I didn't feel a huge difference between the two. I eventually went with the 3.31 rear end because 1) I didn't want to spend the extra $5k for the extra bells & whistles they had tacked on to the car (They kept trying to push this car with a dealer package of wheels, rally stripes, and some interior appearance add-ons that in all reality, only cost them $2500-$3k). It just didn't seem like all that much of a performance increase.
And, I'm more for overall speed and handling, rather than straight line performance, so the 3.31 was better for me.
ORIGINAL: KTownGT
Tuneless Cold Air Intake, it is a mod that adds 25 Rear Wheel Horse Power. The CAI costs $300 I think shipped and is the easiest thing to put on, you just need to know how to use a screw driver and you got it.
ORIGINAL: Mike521
ok that sounds good but what's a tuneless GMS CAI, and what does RHWP stand for? how much does a tuneless GMS CAI go for, including installation?
ok that sounds good but what's a tuneless GMS CAI, and what does RHWP stand for?
how much does a tuneless GMS CAI go for, including installation?
I'd believe 10-15 HP, but 25 HP sounds a little exaggerated.
Back to the rear end question - I drove 2 GT's today in my decision to buy my '07 GT. The feel was there with the 3.55, but I didn't feel a huge difference between the two. I eventually went with the 3.31 rear end because 1) I didn't want to spend the extra $5k for the extra bells & whistles they had tacked on to the car (They kept trying to push this car with a dealer package of wheels, rally stripes, and some interior appearance add-ons that in all reality, only cost them $2500-$3k). It just didn't seem like all that much of a performance increase.
And, I'm more for overall speed and handling, rather than straight line performance, so the 3.31 was better for me.
You came from a crowd that was packed with people with half the cylinders and half the displacement, and 2v Heads [:'(], Of course you are going to get better reults from mods...
Go for the cheaper one and use that extra $$$ on a blower and gears [&:]
2nd Gear Member
Joined: Jan 2006
Posts: 262
From: San Antonio, TX
RE: 3.55 limited slip, worth it compared to stock?
I dont understang buying a V8 sports car and then being all concerned with 2-3mpg. I would gladly trade 10mpg for 50hp. My first car (charger w/440) got 8mpg, gas was $1.25gal & and I made $3.25hr. 20mpg is great guys.
2nd Gear Member
Joined: Jul 2006
Posts: 202
From: Arkansas
RE: 3.55 limited slip, worth it compared to stock?
ORIGINAL: KTownGT
nah, if you go from 3.31's to 4.10's, then you might have like 2 MPG difference. It is slight but it is noticeable.
If I were you I would go for the 3.5's and grab a tuneless GMS CAI, they add about a mpg and 25RHWP [sm=smiley20.gif]
ORIGINAL: Mike521
yea that's what I was thinking when I built it on the website -- 100 bucks when I'm spending 26k isn't much extra in exchange for some better pickup. like I said it'll be the only mod this car ever sees, in all likelihood
does anyone have accurate info as far as the gas mileage difference? seems like there are conflicting opinions.
if it's 1 mpg then I don't care, but if we're talking 5 or 10, well like I said this car is already going to blow away my current ride, so I don't really need every ounce of extra power
yea that's what I was thinking when I built it on the website -- 100 bucks when I'm spending 26k isn't much extra in exchange for some better pickup. like I said it'll be the only mod this car ever sees, in all likelihood
does anyone have accurate info as far as the gas mileage difference? seems like there are conflicting opinions.
if it's 1 mpg then I don't care, but if we're talking 5 or 10, well like I said this car is already going to blow away my current ride, so I don't really need every ounce of extra power
If I were you I would go for the 3.5's and grab a tuneless GMS CAI, they add about a mpg and 25RHWP [sm=smiley20.gif]
I realize that some jealous person is going to probably call BS on this, but I know what I saw. I'm not going to argue about it.
1st Gear Member
Joined: Nov 2006
Posts: 63
From:
RE: 3.55 limited slip, worth it compared to stock?
ORIGINAL: slow07
On a short highway trip (about 15 miles at 55 mph through rolling hills) I averaged 35.2 mpg with my 3.31s. Has anyone with 4.10s come close to this. BTW, mine is stock with an axle-back and 20s. Tire size is same diameter as stock.
I realize that some jealous person is going to probably call BS on this, but I know what I saw. I'm not going to argue about it.
On a short highway trip (about 15 miles at 55 mph through rolling hills) I averaged 35.2 mpg with my 3.31s. Has anyone with 4.10s come close to this. BTW, mine is stock with an axle-back and 20s. Tire size is same diameter as stock.
I realize that some jealous person is going to probably call BS on this, but I know what I saw. I'm not going to argue about it.
6 cyl auto 25
6 cyl manual 28
8 cyl auto 23
8 cyl manual 25
And that's under the best of conditions. Given your name and your gearing I'll assume you have an automatic GT, which would put you at 23 MPG under the best of conditions. I very much doubt you are going to get another 12MPG ontop of that.
ORIGINAL: KTownGT
Tuneless Cold Air Intake, it is a mod that adds 25 Rear Wheel Horse Power. The CAI costs $300 I think shipped and is the easiest thing to put on, you just need to know how to use a screw driver and you got it.
Tuneless Cold Air Intake, it is a mod that adds 25 Rear Wheel Horse Power. The CAI costs $300 I think shipped and is the easiest thing to put on, you just need to know how to use a screw driver and you got it.
-J
Banned
Joined: Apr 2006
Posts: 1,631
From: Goodyear, AZ
RE: 3.55 limited slip, worth it compared to stock?
ORIGINAL: jerjan
A 100 bucks is not a lot of money. Especially when the car costs over 20K. Putting 4.10 gears in the car later will cost a whole lot more than that. But, a 100 bucks might be worth it to you for 3.55s. Either way my 07 came with 3.31 gears with posi even though the sticker didn't say it had posi, it did. If you drive a lot in the city I would say upgrade. If you drive a lot of highway miles don't. If you cant afford a hundred bucks, what can I say?
A 100 bucks is not a lot of money. Especially when the car costs over 20K. Putting 4.10 gears in the car later will cost a whole lot more than that. But, a 100 bucks might be worth it to you for 3.55s. Either way my 07 came with 3.31 gears with posi even though the sticker didn't say it had posi, it did. If you drive a lot in the city I would say upgrade. If you drive a lot of highway miles don't. If you cant afford a hundred bucks, what can I say?
2nd Gear Member
Joined: Jul 2006
Posts: 202
From: Arkansas
RE: 3.55 limited slip, worth it compared to stock?
Skinjob, everyone knows that epa ratings are somewhat bogus. Need proof??? The highway rating for a manual GT with 3.55s is the exact same as the one with 3.31.s. We all know that a slower spinning engine uses less gas with all other things being the same. I friend of mine says that he commonly gets 27-28mpg , on the highway, with his '05 GT manual. You have already proven, with some of your other post, that you like to start arguements. Don't start one with me.
BTW, mine is a manual.
BTW, mine is a manual.
2nd Gear Member
Joined: Jan 2006
Posts: 262
From: San Antonio, TX
RE: 3.55 limited slip, worth it compared to stock?
If you've changed the height of the tires or gears and not corrected the speedo with a programer; your MPG figure will be off because your speedo/odo is incorrect.
2nd Gear Member
Joined: Jul 2006
Posts: 202
From: Arkansas
RE: 3.55 limited slip, worth it compared to stock?
No height change. Don't get me wrong. I don't commonly get this well, because I have a hard time "grandpaing" it. It is usually mid to high 20s on the highway.
