Hey looked through the forum on this couldnt find an answer
I posted this is the 2005 section and got no responses so please help me out

WHen I get my mustang I want to tune it with the Xcal but I want to know what it does for the transmission will lift the rev limiter and top speed, and will it shift quicker? or shift like manual, fast and full of torque

My other question is with the Xcal will it raise top speed because I was looking at getting 4.10 gears and did'nt want to be held down by the governor

thanks for any help and for deal with my great lack of knowledge

 

here check out this thread about the 4.10 gears and xcal tune!
http://forums.bradbarnett.net/index.php?showtopic=24847

 

Will give variable shift points on an automatic, rpm limiter, and govenor as well. Im sure itll do everything you're looking for =)

 

wouldn't 4.10 gears lower your top speed.

As far as I understand it: Shorter gear Ratios provide greater acceleration for the car at the cost of slower top speed. "Shorter" gear ratios have a higher gear ratio. Higher gear ratios provide a greater mechanical advantage between the engine and the wheels resulting in more power at the wheels to accelerate the car. The higher gear ratios also result in lower top speed as there is a greater reduction between engine RPM's and the wheels RPM's. Shorter gear ratios will result in greater engine RPM's at lower car speeds.

http://www.bodydynamicsracing.com/gearing.htm


Or is it that even though a car with 4.10's will have a lower top speed than stock, both top speeds are higher than the computer will allow?

 

You're right, and on the right track. While higher gear ratios do both, in reving through the RMS faster as well as lowering top end speed, you have to consider the theoretical top speed, not the speed the car is limited to by the govenor. Going with 4.10s you will still be able to reach 115mph, at which the govenor is set, only at a higher RPM. If the govenor were completely removed, only then would "top speed" really be an issue. I can only speak for myself, but I rarely ever hit 115, and only when I open it up in a long strech of interstate.

So in short, yes, both top speeds will be higher than the stock computer will allow

 

With the power of the V6 and drag, I bet 4.10's will get you more top speed than witout them. This is of course after getting rid of the governer.

 

Here's my question for you guys. It was posted in the GT forums that there is a HP loss associated with a higher gear ratio. I believe one person reported this on his car to be around 10 hp? I cant remember exactly. How do you think this will affect our cars?

 

I have 4.10 gears and I lost 10 HP at takeoff, but had higher overall HP in mid and high RPMs. I have spoke to a few people about the hp lose and they seem to think my spark needs adjustment, which can be done with the xcal. I am hoping that next week when I get Xcal2 this can be taken care of.

 

Here's my predicament... Im running my true dual set up or whatever, which already loses backpressure in the low range and gains it in the high. I was hoping a set of gears would compensate for this. I plan on going with gutted gats, and long tube headers as well as an H or X-pipe. Ive been told the H-pipe will add the best performance down low. Now I SHOULD go back and run it from a Y-pipe to get that power back through the entire range. However, I LOVE the sound of my dual set up and am afraid of losing it. While my 40 series Flows are reportedly more restrictive than the stock exhaust, Im still have twice the air space I use to. Im also relying resonators for backpressure, and would like to get rid of those eventually for the louder sound. Sorry to jack your thread but any advice would be apprecaited. Is there anything you can do using the X-cal or Diablo to gain this low end power back?

 

You can gain some of your bottom end back with the SCT programs but you'll still be out quite a bit. I would get some UDP's if they are ever released. Also a good dyno tune could target your lower RPM's and that would be one of you best deals.

I have another 05' V6 coming to dyno with me in a week or two, wanna come out and do your's too. I'm sorry I haven't gotten back with you lately as I'm really waiting on the new x-2's to come out so I can do some datalogging and that will help out the most.

Thanks, Doug.

 

Comming down wouldnt do me any good without some kind of tuning device, correct? I dont see the point in buying an X-cal right now when the X-cal2 is so close to comming out.

 

My point exactly, I've been really waiting for the X-2's before I goto the dyno with an 05'. I was hoping to get them in by this weekend but it doesn't look good for it either so my dyno time with the local 05' is out too. I'll be sure and let you know when they do arrive and when I'm heading to the dyno.

Thanks, Doug.

 

werd

 

are we on topic? let me think, no how about we stick with the 4.10 and SCT

thanks

 

Sorry,

The X-cal will raise the speed limiter to 255mph and if you so request it can raise the rev limiter by a few hundred RPM's. The stock 4.0 SOHC is well out of steam at around 5400-5600 rpm's, even on a supercharged version it was played out by 5700 rpm's with the stock cam and heads.

As for the transmission it will improve shifting firmness and feel but not to a neck snapping feel, the new transmission values are very touchy so you where you can improve shifting firmness you can't really make it bang gears using the programming. The SCT programming WILL help the feel though because of the improved throttle features, atleast on mine I can take away the feature that de-throttles the engine before shifting or when your approaching the rev limiter. This by itself makes the X-cal well worth the money.

Yes, the X-cal will raise the speed governer to a point you'll no longer be bothered by.

THanks, Doug.

 

thanks Doug

sorry to be so harsh, it was late and I was cranky. your info really helped

 

Looks like the Xcalibrator 2 is out now!
http://www.sctxcalibrator.com/

 

Mmm.. I have a birthday comming up in about 12 days.. who wants to buy me one?

Hey Doug, let me know how soon you'll be getting one in.. and if you need a car to play around on or anything