Trans upgrades

**codydell01** · 11-04-2016

So time has come, I have the money to do performance upgrades! I'm looking at doing a he351 swap on my 03 with 100 hp injector nozzles...but first I gotta do something with the 48re. Called the guys at bd diesel and they suggested their stage 1 kit with a shift kit in the valve body. Does this sounds correct to anyone. I'm lookin. At like 1200 bucks here.

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**Polaraco** · 11-04-2016

Originally Posted by codydell01

So time has come, I have the money to do performance upgrades! I'm looking at doing a he351 swap on my 03 with 100 hp injector nozzles...but first I gotta do something with the 48re. Called the guys at bd diesel and they suggested their stage 1 kit with a shift kit in the valve body. Does this sounds correct to anyone. I'm lookin. At like 1200 bucks here.

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As an 03 owner. The 48 is pretty stout. I had my own trans done here with the following. Upgraded Frictions, with a performance front band. Rebuilt valve body, I later had to replace a front band servo, which was an upgrade. It all started because my accumulator piston rings collapsed. That said, make sure you replace them with the billet replacements. The front band servo upgrade is really great. They solved the cocking problem with dual rings. It greatly sharpened the 1-2 shift. Basically this is a stage 1 trans and a good towing/street trans. You might save some big bucks if you can find a reputable local guy and give him the parts. This is the first trans I did not do myself. Only because I'm too old to get it out and in the truck.

As far as Torque converters are concerned, look at the Precision brand. Unless you are doing tractor puls, I don't see much of a reason to go with anything more than their high end single disc.

The 351 upgrade is good, but you won't get what you're expecting from it. The 03's are pretty clean to start. The 351 actually will slow it down. The extra air from the turbo, leans the exhaust even more. Leaner exhaust means lower turbo speeds and pressures. But there is a slight performance + to it.

I did 50HP injectors.Talk to @AccurateDiesel about them......Mixed emotions with the results

I might suggest you look into the MM3 Tuner. I am currently working with Ray @Double R Diesel working out the kinks in the software for our trucks.

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**codydell01** · 11-04-2016

Originally Posted by Polaraco

As an 03 owner. The 48 is pretty stout. I had my own trans done here with the following. Upgraded Frictions, with a performance front band. Rebuilt valve body, I later had to replace a front band servo, which was an upgrade. It all started because my accumulator piston rings collapsed. That said, make sure you replace them with the billet replacements. The front band servo upgrade is really great. They solved the cocking problem with dual rings. It greatly sharpened the 1-2 shift. Basically this is a stage 1 trans and a good towing/street trans. You might save some big bucks if you can find a reputable local guy and give him the parts. This is the first trans I did not do myself. Only because I'm too old to get it out and in the truck.

As far as Torque converters are concerned, look at the Precision brand. Unless you are doing tractor puls, I don't see much of a reason to go with anything more than their high end single disc.

The 351 upgrade is good, but you won't get what you're expecting from it. The 03's are pretty clean to start. The 351 actually will slow it down. The extra air from the turbo, leans the exhaust even more. Leaner exhaust means lower turbo speeds and pressures. But there is a slight performance + to it.

I did 50HP injectors.Talk to @AccurateDiesel about them......Mixed emotions with the results

I might suggest you look into the MM3 Tuner. I am currently working with Ray @Double R Diesel working out the kinks in the software for our trucks.

I Run a smarty jr and thinking about going with the st... But as far as the 351 goes I was looking at it for power and boost gains l, egts aren't really a consern for me. What's some other ways I can make extra boost to keep up with the injectors?

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**Polaraco** · 11-04-2016

That was my point. . .I was running a quadzilla back when I did my 351 swap. I really didn't gain much from it. But with the Junior, you may see more than I did. The point wasn't about EGT's. The new turbo will lower them and slow the turbo down. That's what I got

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**AccurateDiesel** · 11-04-2016

In the injector nozzle department, we would be glad to help - both 50 and 100 HP nozzle kits in stock with brand new OEM nozzles. $50 IGOTA discount.
Feel free to contact me directly if you have questions.

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**codydell01** · 11-04-2016

Originally Posted by AccurateDiesel

In the injector nozzle department, we would be glad to help - both 50 and 100 HP nozzle kits in stock with brand new OEM nozzles. $50 IGOTA discount.
Feel free to contact me directly if you have questions.

I for will for sure be contacting you

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**Polaraco** · 11-04-2016

Thanks Tim. Do you think he should just stay with the 50's?

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**AccurateDiesel** · 11-04-2016

Well, there is a lot that goes into that discussion. In general, if someone is buying 100HP nozzles they should be the more serious performance-oriented individual. They are not right for everyone - 50's are a great drop in that are easy to live with. 100's will probably drop you mileage and create a little more smoke.....

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**codydell01** · 11-04-2016

I plan on doing more performances based mods later so would it be better to go with 100?

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**AccurateDiesel** · 11-05-2016

100's will definitely give you more room to grow than 50's. If power in that range is your ultimate goal, then you definitely don't want to undersize the nozzles.

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