Did you know the Ford Escort used a HEMI?
I read somewhere that there are actuall a few engines out there that use this design. They just don't call them HEMI.
Hey, I will give Dodge credit where credit is due. This motor sounds like it will be powerful. Hopefully Ford makes some improvements soon so we can have something to brag about. Untill then we only have the best looking trucks. I've become pretty attached to my 4.6, so I'll be sticking with it for a while!

 

If an engine makes 90% of its peak torque < 2000 rpm and peak torque at >4000 rpm, it doesn't make 90% of its peak HP at <2000 rpm.

HP = Torque*RPM/5252.

Also, the 4.6/5.4 engine looks like a "Hemi" to me. It is definitely a hemisperical combustion chamber.There is just no advantage to Ford calling it a hemi since everyone thinks of Mopar when they think of "Hemi".

 

Wittom,I dont think you did your homework on the 24 valve DOHC 4.2 sraight six in the new Trailblazer.It has a much flatter torque curve than the 5.4 Triton and produces over 90% of available torque at just 1600 rpm.And the seat of the pants feel on my wifes Trailblazer(with 3.73 gears) is that it pulls harder at low rpm than my 2002 Screw with 5.4.If youve ever driven a staight six you'll remember how well they pull at low rpm,theres alot of engines out there to pick on for unusable power(too high in the rpm range)but the 4.2 Chevy isnt one of them.....

 

real nice contribution to the 5.7L Hemi thread there Bill, i'll file that one away.

 

With a displacement of 5.7 how could dodge go wrong? They are building on GM's proven 5.7 Vortec. GM for some reason got rid of their truck motor and instead installed a high reving car motor, go figure. I have faith that dodge can copy the motor right, they just need to make sure that their heads are good to go. That's my $0.02 Late!

 

other than them being v-8's and sharing the same 5.7 displacement, the old small block chevy and the new 5.7 dodge will have little in common.

 

thats the dumbest post that I have ever read....copying from GM....do you know that GM changed its block design to the same angle as the Chrysler V8's....thats why it is important to have a 4 bolt main on a GM V8 is because of the weak bottom ends......

 

now thats the dumbest post.

you think the angle justifys a 4 bolt main? did gm copy the angle? what it is some secret , majic angle, maybe that the same angle as the GRX from speedracer. have you seen how beefy the mains are in the 4.6 and 5.4, i thought this was done for strength, longivity and the higher h.p. and torque rating the newer trucks are getting. 4 bolt mains are usually what contributes to a strong bottom end , not a patch for a bad one.

 

theres no secret...the only simularity between the new HEMI and the 350 is Litre's.........everything else is different......the chevy's have weak bottome end because of the piston angle in relationship to each other and the crank......If you put togher a 350 with 11 to 1 compression ratio you would blow your bottom end...if you built a 340 or 360 with 12.5 to 1 compression ratio you can still use the stock bottom end and with proper quench it would run off of pump gas.