Mustangs = No top end?
10-25-2005, 05:22 PM
#1
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Mustangs = No top end? My buddy recently just got his motor built in his 89 gt.
He has a DSS 331 engine
10.5 :1 compression
AFR 185's
RPM II intake
Shortie Headers (BBK I think?)
X-cam
32# injectors
1.7rr's
3.55's and its a 5 speed
That is pretty much the major stuff he has done to it. Anyways he said he got it dynod/tuned and it put down 36x to the wheels. While we were out around town we ran into a guy with a 02 Z28. He said he had loudmouth, CAI (I think he called it a lid), and long tubes.
From a dig my buddy has this guy by 2-3 cars up until around 120mph. From then on the guy just starts to creep by us. It happened multiple times when they ran. Do mustangs have no top end or is the LS1 that much better up top.
He has a DSS 331 engine
10.5 :1 compression
AFR 185's
RPM II intake
Shortie Headers (BBK I think?)
X-cam
32# injectors
1.7rr's
3.55's and its a 5 speed
That is pretty much the major stuff he has done to it. Anyways he said he got it dynod/tuned and it put down 36x to the wheels. While we were out around town we ran into a guy with a 02 Z28. He said he had loudmouth, CAI (I think he called it a lid), and long tubes.
From a dig my buddy has this guy by 2-3 cars up until around 120mph. From then on the guy just starts to creep by us. It happened multiple times when they ran. Do mustangs have no top end or is the LS1 that much better up top.
10-25-2005, 05:30 PM
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5th gear sucks in the T-5's and the 3.55's arent' helping either. It's the same thing with mine i race to the top of 4th and quit i know after i shift into 5th and it's a decently close race the other car is going to pass me. Why doesn't he have 4.10's in it? He has the motor for it.....
10-25-2005, 05:35 PM
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Originally Posted by 89tang
5th gear sucks in the T-5's and the 3.55's arent' helping either. It's the same thing with mine i race to the top of 4th and quit i know after i shift into 5th and it's a decently close race the other car is going to pass me. Why doesn't he have 4.10's in it? He has the motor for it.....
10-25-2005, 05:37 PM
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Originally Posted by XSSpeed
After the engine I honestly dont think he can afford them. Ill ask him, but im pretty sure thats it.
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10-25-2005, 05:42 PM
#8
He should opt for the 4.10's or 3.90 at LEAST. It is only about $200 for the gears and $100 for the installation kit if he can find a friend to help with the install, Also, he needs to think about a TKO500 pretty soon...Some T5's last, others dont...mostly depends on the clutch, Spec clutches kill em' (or any hard grabbing one's for that matter.)
10-25-2005, 06:19 PM
#9
ive seen similar results from many built 5.0 cars against LS1's
the 5.0 will outrun the ls1 on the lowend, but once the LS1 can hang in its sweetspot longer (highway).
i doubt that 4.10's would help this guy past 120mph.
think about it, if he can run 4th gear to 120 with 3.55's and his race is over in 5th..
now 4th ends at 100mph. 5th will be stronger but by no means suitable to race with.
bascially what im saying is that the LS1 was geared a lot better for the high speed race.
all that ive seen in the past years is that the 5.0 just isnt the top-end champ that the LS1 is, modified or not.
ive ran plenty of "11sec 5.0's" on the highway and they all try to play catch-up.
now i wouldnt dare try to run one from a dig and embarres myself like that
the 5.0 will outrun the ls1 on the lowend, but once the LS1 can hang in its sweetspot longer (highway).
i doubt that 4.10's would help this guy past 120mph.
think about it, if he can run 4th gear to 120 with 3.55's and his race is over in 5th..
now 4th ends at 100mph. 5th will be stronger but by no means suitable to race with.
bascially what im saying is that the LS1 was geared a lot better for the high speed race.
all that ive seen in the past years is that the 5.0 just isnt the top-end champ that the LS1 is, modified or not.
ive ran plenty of "11sec 5.0's" on the highway and they all try to play catch-up.
now i wouldnt dare try to run one from a dig and embarres myself like that
10-25-2005, 06:20 PM
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sounds like a pretty stout motor, I think it would do alot better with LTs as well, but if he doesn't have money for gears, I doubt he has for those either.
10-25-2005, 06:39 PM
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4.10's would help him in 5th it would change the gearing of the tranny making 5th a usable gear instead of an overdrive gear. Rather then the rpms being at say 2000rpm shifting to 5th with 3.55's the rpm's would be in the 2500-3000rpm with 4.10's shifting to 5th being closer or in his power band.
What would really solve the problem is to throw a 6spd. in it
What would really solve the problem is to throw a 6spd. in it
10-25-2005, 07:27 PM
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Originally Posted by 89tang
5th gear sucks in the T-5's and the 3.55's arent' helping either.
10-25-2005, 07:45 PM
#13
4th gear ends at about 110 with 4.10's at a 26" tire. with 4.10's cruising at 60 is about 2500ish rpm according to my stock tach (car is in paint shop due to wreck (not my fault) and have not driven in a month, memory is foggy)
10-25-2005, 10:41 PM
#14
Originally Posted by 89tang
4.10's would help him in 5th it would change the gearing of the tranny making 5th a usable gear instead of an overdrive gear. Rather then the rpms being at say 2000rpm shifting to 5th with 3.55's the rpm's would be in the 2500-3000rpm with 4.10's shifting to 5th being closer or in his power band.
What would really solve the problem is to throw a 6spd. in it
What would really solve the problem is to throw a 6spd. in it
each indevidual gear has its own ration i.e 4th gear is a 1:1 ratio and on a 5speed car making 5th the "overdrive" gear being somewhere in the range of 2+:1.
meaning that the car has to work roughly twice as hard to move it the speed as the previous gear.
all the rear-end gear changes is your final drive gear meaning that all your transmission gears suffer the same reduction % based on there individual ratio/gear.
10-26-2005, 01:00 AM
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Originally Posted by black00TA
changing the rear-end gear does not effect the tranny gears in any way.
each indevidual gear has its own ration i.e 4th gear is a 1:1 ratio and on a 5speed car making 5th the "overdrive" gear being somewhere in the range of 2+:1.
meaning that the car has to work roughly twice as hard to move it the speed as the previous gear.
all the rear-end gear changes is your final drive gear meaning that all your transmission gears suffer the same reduction % based on there individual ratio/gear.
each indevidual gear has its own ration i.e 4th gear is a 1:1 ratio and on a 5speed car making 5th the "overdrive" gear being somewhere in the range of 2+:1.
meaning that the car has to work roughly twice as hard to move it the speed as the previous gear.
all the rear-end gear changes is your final drive gear meaning that all your transmission gears suffer the same reduction % based on there individual ratio/gear.
i didn't really mean it would literally change the gearing in the tranny i know what every gear is.Well why even change the gear at all if it doesn't help i might as well stick my 2.73's back in my stang...........................
10-26-2005, 03:22 AM
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Originally Posted by black00TA
hehe, ill tell ya what. i bet it would run pretty damn good on the highway 
10-26-2005, 05:39 PM
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I tell you what...put 3.27s and a big single turbo and top end is no problem in a mustang. Thats what i run on my turbo stang and its fine on the highway running with ls1s up to 140. I could probably go more but don't want to run boost hard at WOT in 5th gear.
10-26-2005, 07:05 PM
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Originally Posted by unit213
I guarantee that I have no problems up top, but this post was about Fox's I thought?