ENDT 711

[607t1173]

I have seen several posts that mention 711T's, over the years I've seen many 673T's and even owned quite a few.

My question is did any trucks leave the factory with 711T's ?

I have owned several with naturally aspirated 711's and only two an F and an R with 711T's, On closer inspection

I found that the turbo's on both 711T's had the same part #'s as the turbo that Mack used on the 673T's and when I

had one of the 711T's apart it had the same pistons as the naturally aspirated 711.

Someone posted here that they were early C motors, which I know to be wrong, so maybe someone can enlighten me

[Mike]

Not sure but Tom could help at the Mack Museum. They get these questions often.

mike

[Maddog13407]

to my knowledge no 711's left the factory with turbos and its pretty inpossible for a 711 and 673 to have the same pistons.... the 673 had a 4 7/8 's bore and the 711 and 237 had a 5'' i believe

[HK Trucking]

The ENDT 675 237 Maxidyne was a 672 cu in engine with a 4 7/8 bore, same as the 673.

[607t1173]

i didn't claim that they had the same pistons just the same turbo's

[Maddog13407]

yea, read that wrong and wrote it wrong as well haha, sorry guys. the 711 had 5'' bores and the 673 and 673 had 4 7/8 i believe and no 711's were turbo from the factory although there seem to be alot more showin up lately so Mack must have retorfitted quite a few of them.