Official boss block build

[roberts]

I have been thinking of doing the th400 in my car but stuck between the th400 and a 4r for 700 to 800 hp.

 

[Dillon Dollar]

I have been thinking of doing the th400 in my car but stuck between the th400 and a 4r for 700 to 800 hp.

Th 400 is lighter and smaller and can be built stronger as well.

The 4r70w can have overdrive and is a Ford transmission with less hastle but i think 900 to 1000 is the limit on those.

Im looking to make 1200 plus so i went th 400

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[roberts]

Yea but the th400 if u gear it right be no big deal to do 70 - 80 mph and still do good at the track

 

[Dillon Dollar]

Yea but the th400 if u gear it right be no big deal to do 70 - 80 mph and still do good at the track

I should turn about 2300 rpm @ 70 mph on my setup

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[roberts]

What rear gear u going go do?

 

[Dillon Dollar]

I think its a 3:27 out back forgot what 3rd was.

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[roberts]

Yea. Going to pm u ask a couple questions if that's cool ?

 

[Dillon Dollar]

Yea. Going to pm u ask a couple questions if that's cool ?

No problem. They may not get answered until tomorrow though im crashing out. Almost 11 here in texas

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[roberts]

Yea I'll pm u tomorrow same here

 

[01yellerCobra]

I think its a 3:27 out back forgot what 3rd was.

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Third is 1:1.

 

[Dillon Dollar]

Correct

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[JPO8GT]

I'm power glide after a 4r70 I like both but if you're not always running interstate the 400 is going to be good. What first gear ratio you running on 400? If you run the interstate with no lock up and no over drive just cruise 5 mph slower 65 isnt bad for gearing in the mid 3.50's to 3.73.

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[retfr8flyr]

If you want the strength of a TH400 and still have overdrive, look into doing a 4L80E swap. That is the way I am going when my 5R55 give up.

 

[Dillon Dollar]

The 4l80 is too big and won't clear my turbos.

I forgot what gearing we went with but i know its the longer gearing so i don't boil the tires off

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[JPO8GT]

Power Glide will help turbo spool quicker turbos love load but with twins TH400 will be really good!

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[Dillon Dollar]

Yeah i think the turbo 400 will serve me well. Its still a street car. I considered doing a gear venders overdrive

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[JPO8GT]

Yep it was a tough decision for me to make between the PG & 400. I went with PG and now that I've street driven it it lights my Turbo up realy quick! Without having to shift quick. I'm happy I don't think I would have been sad with a 400 either. Mines still a street car too I'm sporting A/C Shaker stereo still have my Bluetooth Microsoft sync from Ford

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[roberts]

Jp08gt what PG u have and what gearing u got? Also how is it to street drive it at 65mph or so

 

[Dillon Dollar]

Update: the new turbos have arrived it's full tilt boogie on the build. I may have a car again soon.

It will look good beside my gt 350

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[flyfaster1]

Sweet, looking forward - to both!

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