Re: [DML] Re: DMC engine upgrades

[Bob Brandys <oehcs@xxxx>]

Steve,

Clearly headers and a low restriction exhaust would improve the D.
However, I can tell you that headers with short mufflers are quite load
and detract from some of the pleasure driving the car long distances.
This is what I have on my V-8 car.

My son wanted to get more rumble and performance out of his 75 olds
350. My muffler shop friend recommended eliminating the muffler and
just run a 21/2" pipe back from the catalytic converter. The car has
the old pancake converter with the little balls it in that were not very
restrictive.

We did this and it turned out really nice. The car definitely has more
torque and the sound level is very acceptable. IF you have ever driven a
car without mufflers (e.g. straight headers) you know that during
acceleration they are very noisy but during constant speed the noise
goes way down.

SO the car make some noise while accelerating but is very quite during
regular driving.

The point to this is what if this was done with a delorean. Just by
pass the muffler (keep the converter) with a straight single pipe
exhaust. This would not be too hard to do.

The only car I know that has done something like this is Marty. He has
a single exhaust from his turbo, but it has a muffler. His car sounds
really nice. Perhaps this means the D engine like a single exhaust.

Anyway some one out there needs to try this. You would just need a
custom pipe to bring the exhaust out past the rear fascia on one side.
This would really cut down on engine heat also.

Headers with long runners (36 -38") are good for producing more low to
mid range torque. However, this length is impossible to achieve on a
D. Therefore, headers will only be useful in getting more top end
power out of the engine - more savaging at high rpm I am not sure that
is what is desired overall. The single pipe or a fancy Y pipe dual
exhaust would be better.

If someone wants to buy my muffler, I will have the custom pipes made up
and tested on my stock delorean.

Bob Brandys
97 ? Delorean V-8, 4 speed automatic, real full size windows