speedo question • The Dodge Challenger Message Board

by **ianandjess** » 04 Jul 2006 11:24

gday guys
will a 150 mph speedo out of a rallye dash fit in place of the 120 mph std dash speedo coz even my 318 is going to be capable of more than 120 when ive finished it & i like the asymetrical look so i wont to stay with the std dash
cheers ian

by **spitfire9137** » 04 Jul 2006 13:07

Im not a expert guesser like Dave, but looking at pictures of the 2 I would say no, since the housings are completly different, and they molded different.

by **Moparman1972** » 04 Jul 2006 16:50

They aren't even close. The one in the rallye dash is a different size, and it is angled differently, as spitfire9137 said. You'd have to switch the whole assembly for a rallye dash, or get an aftermarket speedometer and mount it up somewhere.

Im not a expert guesser like Dave,

Me neither.

by **dave-r** » 04 Jul 2006 18:09

I'm still trying to get over the thought of a little 318 pushing a car as un-aerodynamic as the Challenger to over 120mph. :shock:

by **72challengerorange** » 04 Jul 2006 18:43

My 1st car was a 74 Plymouth Scamp w/318 2bbl and I could bury the needle @120! If it was accurate all stock!LOL
It must be nice to have those highways over there as you'll get arrested here for doubling the speed limits..55 sometimes 65
Have a great day gentlemen.

Tom

by **Moparman1972** » 04 Jul 2006 22:16

Dont you make fun of 318's! Heck, quite a few new cars can hit a buck twenty these days even with four-bangers. My buddy has an underpowered station wagon that still makes 110, albeit with the engine screaming like crazy. A hot-rodded 318 is just right for me. I can drive it everyday because it gets ok gas mileage and I still have power when I need it.

by **dave-r** » 05 Jul 2006 7:58

It is not the engine. It is the 4000lb brick of a car that is the problem. But I was teasing a bit. Sorry. :roll:

by **ianandjess** » 05 Jul 2006 11:41

thanks guys
it looks like ill be staying with the 120 mph speedo then but yes dave im quite confident itll do more than that ive had smaller motors in cars just as heavy & un aerodynamic that were good for 125+ & 1 of them was stock
cheers ian

by **dave-r** » 05 Jul 2006 14:09

OK OK! I could do 120-130mph (on the speedo) in my stock 318 powered Aussie Charger. But taking into account that most stock speedos indicate 10%-15% higher than real speed it was probably going a fair bit slower than that.

Just as well really beause with all the worn steering joints it tended to bounce from lane to lane on the slightest bump in the road! :s008:

I used to call it "Hunting for Minis to pounce on". :mrgreen:

by **ianandjess** » 06 Jul 2006 10:42

yea dave quite a few of the aussie chugga's got that way i think it had something to do with the way they got treated
cheers ian
ps i was guilty of giving mine a very hard time to

by **706pkvert** » 16 Mar 2007 2:16

I can re-face your speedo dial to a 150 scale.........