Magnum xl kit

[Bcalimer]

Ok so I plan to install a magnum trans in my car. Any tech tips I should know before I start? Also how will it effect my et's if I install 4.56's at the same time?

 

[zeroescape]

Your question about ets is pretty vague. Best to add some more info so people can help you. Like what are your previous ets, wide or close ratio magnum, and rear tire size.

 

[Bcalimer]

Sorry about that. I'm going with the 2.97 first gear trans. I run a 28 inch slick with 3.73 gears and the mt82 trans. Car is n/a and has been 11.1 at 122 with current setup.

60 ft is low 1.5's

 

[Blackbeast12]

I just picked mine up from a tremec install last week what would you like to know?

Sorry about that. I'm going with the 2.97 first gear trans. I run a 28 inch slick with 3.73 gears and the mt82 trans. Car is n/a and has been 11.1 at 122 with current setup.

60 ft is low 1.5's

To keep the same ratio as the mt-82 on a n/a car u will need 4:30's which nobody makes for these cars so 4:56's next best step!

I had 3:31's with my mt-82, so i had my installer put 3:90's in my f/i car at the time of the tremec install. Its a perfect fit actually feels a little more ballsy!!

 

[maximus0158]

4.30 gears have been made for 8.8s forever.

http://www.americanmuscle.com/motive-430-2011gt.html

Motive gear makes them.

 

[Blackbeast12]

I have motive 3:90's in mine now, i didn't know they made 4:30's, I'd get em! Just checked their site, yep they are the performance version as well which is the harder material for strength like my 3:90's! Use this tool to dial in what you want!

http://xse.com/leres/bin/gearratio?...4.82&revs=747&section=285&profile=35&wheel=19

 

[DGRacing]

Hey guys. I have the 2.66 magnum and track my boss only. Swapped to 3.90s but still lack some accel. Should I go 4.10s or 4.30s? Will be adding TVS down the road.
Thanks.

 

[Blackbeast12]

Hey guys. I have the 2.66 magnum and track my boss only. Swapped to 3.90s but still lack some accel. Should I go 4.10s or 4.30s? Will be adding TVS down the road.
Thanks.

4:10's for the tvs 4:30's if the tvs is delayed!

 

[sean04]

Ok so I plan to install a magnum trans in my car. Any tech tips I should know before I start? Also how will it effect my et's if I install 4.56's at the same time?

Im installing my magnum right now. When I did the math if you have a 3.73 gear mt82 it will be very close with the magnum and a 4.88 gear in 4th

Im going with 5.14's which would be like a 3.90 in an mt82

for the gearing calculator lets pick an rpm 7800 and a tire size 28"

mt82 with 3.73 rear gear
1st 3.66 48mph
2nd 2.43 72mph
3rd 1.69 103mph
4th 1.32 132mph

magnum xl with 4.88 rear gear
1st 2.97 45mph
2nd 2.10 63mph
3rd 1.46 91mph
4th 1.00 133mph

magnum xl with 4.30 rear gear
1st 2.97 51mph
2nd 2.10 72mph
3rd 1.46 103mph
4th 1.00 151mph

with a 122mph trap speed that will put you around 6300rpm thru the traps

 

[Blackbeast12]

Wow 5:14's is pretty steep, you won't need them if you plan on supercharging or turbo charging the car later. My 3:90's and my tremec are faster then my mt-82 and stock 3:31's but I'm also supercharged...any way good luck man!

 

[DGRacing]

Im installing my magnum right now. When I did the math if you have a 3.73 gear mt82 it will be very close with the magnum and a 4.88 gear in 4th

Im going with 5.14's which would be like a 3.90 in an mt82

for the gearing calculator lets pick an rpm 7800 and a tire size 28"

mt82 with 3.73 rear gear
1st 3.66 48mph
2nd 2.43 72mph
3rd 1.69 103mph
4th 1.32 132mph

magnum xl with 4.88 rear gear
1st 2.97 45mph
2nd 2.10 63mph
3rd 1.46 91mph
4th 1.00 133mph

magnum xl with 4.30 rear gear
1st 2.97 51mph
2nd 2.10 72mph
3rd 1.46 103mph
4th 1.00 151mph

with a 122mph trap speed that will put you around 6300rpm thru the traps

You don't want to compare 4th gear to 4th gear. You compare the magnums 4th gear 1:1 to the MT82's 5th gear 1:1

Be prepared to be disappointed with those 5:14's!

 

[kdanner]

You don't want to compare 4th gear to 4th gear. You compare the magnums 4th gear 1:1 to the MT82's 5th gear 1:1

Be prepared to be disappointed with those 5:14's!

He mentioned trap speed. If he's only using 4 gears in each trans, those are absolutely the ones he should be comparing.

 

[Rpm427sc]

I put mine in a few months ago. Amazing setup, you will love it. One "tip" I can give you, is make sure you run a clean up tap through the starter bolt holes while the bellhousing is on the bench, Mine had powdercoat clog some of the threads, which made installing the starter a PITA.

 

[cyclerick]

I understand that I have to have my tune updated for the new tranny. Is this only to change gear ratios so that speedo is correct? Can the car be driven without immediately updating the tune for the new tranny?


Sent from my iPad using Tapatalk

 

[Justinjor]

Yes

 

[5.ohmygod]

I put a magnum in my car and when I tried to get the ratios updated in the tune, I was told that can't be done. I have read that it can, is there something I can tell the tuner to convince them to do it?

 

[s8v4o]

I put a magnum in my car and when I tried to get the ratios updated in the tune, I was told that can't be done. I have read that it can, is there something I can tell the tuner to convince them to do it?

Who told you that? Are you trying to update that through a handheld or a professional tuner?

 

[5.ohmygod]

I'm just using an sct from bama. I called them up and talked it over with them and they swear there is no such adjustment, they also say the ECM doesn't care what the transmission ratios are. I ended up getting the 'we'll look into it and get back to you' line and haven't heard anything since.

 

[cyclerick]

Anyone get a check engine lite from the install?


Sent from my iPad using Tapatalk

 

[Blazer707@TBR]

If it is misfire codes then you need to do a neutral profile relearn with an IDS.