He has longtube headers,intake, and a dyno tune. Puts out 340rwhp/356rwtq

Yes he does. LTs,intake,dyno tune. 340rwhp/356rwtq. He said his 4th gear is messed up, it goes slight to the left?

I didn't know gto's couldn't fit fat tires... that SUCKS.

 

There rear fenders aren't rolled like ours are. Feel ours, they are rolled back 180 degrees for more tire clearance.

 

****, those goats must be heavy! 340/356? Good job running him down! Was that run WITH your 4.10 gears or before you had them? I really need some more gear with these 20's. I think folks make too much of a fuss over 20's. With the right gearing to make up for them I don't think they're that much of a hindrance...

Look at the Dodge Ram SRT-10. It rolls on 22's but has 4.56 gears to offset.

 

i DID have my 4.10s in, and i think you should do it right away! I can't believe my car used to be so slow!

 

LOL

 

I had 275's on mine when I bought it but they rubbed bad so I went with 255's. There is not much lip to roll either. 275 is the max and it requires some finesse

Last time I weighed my GTO it was 3740 by itself.

20's make for alot of unsprung mass even without the gearing which is more detrimental to speed than the gearing. For a truck with 500 hp and 4.56 gearing it actually suprised me that the average driver can barely wring out a high 13 second time slip. Many were in the low 14 second range. On the forums I looked at changing the rims alone on those monsters made a huge difference.

 

I have lurked around on the GTO board for weeks and this video has never shown up. To be fair, none of the videos showing a Mustang kill do, but I have held out hope that their forum would develop a sense of humility. Guess it hasn't happened yet.

My GTO had it's virtues, although I don't miss it. This video shows that the difference in performance is easily fixed. Moreover, I have to acknowledge that the Mustangers I have met have been very good people - salt of the earth kind of guys with no chip on their shoulder for other cars. They like their Mustangs, but they don't need to discredit other cars to justify their purchase...unlike experiences I had with another group of owners.

 

Newbie here.

Q. I have an 05 GT w/ stock 3.55 and 20" halibrand wheels. Am I esentialy running a 3.08 w/ the 20's? I would like to add 4.10's. Would the 3.90's be a better choice?

 

Not exactly, obviously when adding larger rims you select tire profile smaller to get as close to the total diameter you can to the stock rims and tires. But the extra torque you get from the 4.10 multiplier helps offset the extra rotational mass of the 20" rims since you are now taking hte drieshaft torque and multipling it by 4.1 instead of 3.55.

I would not suggest going from 3.90 from 3.55. It'll feel faster then 3.55 but not like 4.10 and 3.90 to 4.10 should only hurt about 1mpg.

Ideally if you are going for speed switch to 4.1 and back to 17 or 18 inch wheels.

 

Knight, that's a great answer. I appreciate the help. I am having MV Performance install the 4.10's for me this coming Monday. According to Tire Rack's info my current tire yields 755 rotation per mile while stock 17 tire yeilds 768 rotation per mile. I would have thought my 20's would have been less than 755.

Anyways, thanks for the help!

 

not to jack this thread but i cooked a new gto at no problem raceway here in belle rose louisiana wednesday now granted i have a few bolt ons and gears ( not sure if he was stock but i ran a 13.3 to his 14.2 )now i know it probably will be said he cant drive but this is the 3rd time ive ever raced at a track so im nowhere near a pro either lol

 

I'd say humble, it was a hard pill to swallow in 1992 when the LT1 hit with its 285hp and Ford was all giddy about a 205hp 5.0 and then slapped the faithful in the face with the 351 in the 95 R model only, of course even darker times were around the corner. In 1996 there was the awesomeness of th 2v 4.6 and its blistering 215hp and GM taking pity with the LS1 (300 cough, cough, more like 340 to 350) in its regular cars, to step up and even hope to play with your run of the mill Z/28 required a trip to SVT.

Awesome times indeed to be a Mustang fan, and Ford certainly did us proud with the 260hp PI cars, what a nice way to counter the LS1 again, to bad it was in the form of a 320hp 4v V8 to be had only in the Cobra.

Ultimately Ford did take the lead in 2003 with the Terminators, such a pity F-body production had ceased in 2002.

Finally after 13 years Ford had the answer in the 2005 Mustang, 300 honest to god HP in the hands of the GT - unfortunately the superlative S-197 had gained about 200-300 pounds in the process.

I think you might want to check back in on the '11 GT if it only weighs in at 3600 or so pounds and comes in with a 400hp 5.0. That will bring the jerks out of the wood work when the run of the mill GT can again compete with the run of the mill SS.

 

I raced a G8 about a week ago at Richmond Dragway - I cant help but wonder if it was a V6 - the times were a little fast since he was running high 14's to 15 flat. I expected better, especially since the 107' ASL elevation combined with crappy humidity along with high temps were knocking about 4/10ths off of alot of peoples times.

my best was only a 14.31 compared to a 13.89 at Buds Creek

 

Problem is the 05 while rated at 300 only put 265 to the wheels and GM underrated the F-body so that it wouldn't compete with the Vette. All the 00-02 LS1's (with LS6 intake) were 350bhp as shown in the 04 GTO.

It also doesn't help when Ford underrates (again) the motor with a horrible tune so that the average car will go 100k miles w/o incident. This just adds to the GM guys BS. A tune will bring the S197 up to "stock" LS1 figures of ~290-310 (ok we're getting optimist here) RWHP.

Don't get me wrong, I love my S197 and they built a great car that spanks the F-body in every way except acceleration but if they don't pull something out of their hat this go-round I may just be shopping an LS3 Camaro...

 

I dunno if I'll swap out, I admit from the side and the front I really like the F5 (apparently since I like the S-197's interior in IUP form I'm told I dont have any taste at all when it comes to interior design so the F5 interior wouldn't bother me) out back the car lets me down, but thats not a big deal.

I'm gonna wait and see. Losing to an F5 will gall me to no end, but in my heart I'm a Mustang guy and as long as the power to weight ratio is around the same I'm not gonna get my panties in a twist if the next gen Mustang doesn't out power the F5. On the suspension front I'm one of the guys who likes the S-197's simplicity so thats a non-issue there. If the next car has a mac strut/IRS so be it, if it has a mac strut/SRA good for me.