Ok, first yesterday i heard some guys talking about a Fiero with a northstar engine...that sounds pretty hard,is that possible and what kinda car are we looking at then?

Second...I know a guy with a Supra that Constantly trash talks Domestics...He claims he kills doemstics on the freeway like its nothing becuase his car his dual overhead cams....for the most part i can see him beating some old 3 speed Nova on the freeway but I cant picture his N/A Supra whooping on a 6 speed LS1...Its more the gear ratio that determins top end then the cams right?

I guess thats it

 

Well, the DOHC part does play a role...but it's not the sole reason.

As a whole, DOHC engines do well in the upper RPM range. That's because the 4 valves help breathing at high RPM, so DOHC motors respond well.

My 4.6L DOHC Lincoln takes off on the highway when i get the engine up in the RPM's, but down low it doesn't do as well as the good ole pushrod 5.0 with it's low end torque.

But yeah, DOHC cars tend to do better at highway speeds....unless of course it's a DOHC 1.8L engine with 120HP

 

haha, there is no wat an N/A supra could beat an LS1 on the highway, even if it was DOHC.

 

gotto to love those LS1's!!

 

More than likely, the domestics were taurus's, cavaliers, etc. :sillylol:

 

A northstar in a fiero would be bad ***.

 

V8 Archie
This guy has been in the conversion for sometime now...funny enough, the stock tranny will hold up to some large horsepower...
Doesn't sound like it would be too rough doing the conversion. No doubt with a V8 stuffed in a light car, you either looking at a death trap, or one insanely fast pocket rocket no R I C E could match:hail:...


Look Ma'!! A Tuned Port Injected ZZ4 in this Fiero...

 

last year at the world of wheels in boston some dude had a 3.8 sfi turbo motor in a fiero, that thing rocked. i have pics of it, i'll try to find some

 

People talk about DOHC setups like it is a power adder. All DOHC does is alow more flexibility when choosing a cam configuration for the motor. It is useful when trying to get higher specific output, letting smaller motors make more power than they would with a pushrod-type setup, as well as making it easier to make the engine more efficient. Pushrod applications are more suited to low-end torque, but by no means does DOHC make a car a powermonger. no matter what motor makes it, 300hp compared to 150hp is still a mismatch. Besides, even at highway speeds, it is still TORQUE that causes acceleration. Horsepower is what lets the car maintain headway at high speeds, counteracting the drag imposed on the car by wind resistance. (It is easier to picture if you think of horsepower as horsepressure, as it is referred to sometimes.) The reason it seems that horsepower is so important
when accelerating on the highway is that you have to rev the **** out of the engine at those speeds, due to the fact that you are in a higher gear and the transmission is not providing the engine with as much of a mechanical advantage to the wheels. Just my two cents.

 

Man DOHC is only Double Overhead Cam, the only thing that thing means is that you have two cam above each head, you have one cam for intake valves and one for exahust valves that is all, you can make Big Low end torque (With Big displacement) With that system it only depends on the cams and the rest od the setup, On problem asosiated with DOHC is that allmost all of the engines using this system are 3 or more valves per cilinder so if they are designed poorly they have problems maintaining high air velocity at lower rpm operation.

OHC means Over head cam (Used on Single overhead cams they just omit the single, they are used on 2 valves per cilinder and 3 valves per cilinder)

The real benefit of overhead cammed engines is that you have less moving parts and the valvetrain can make it to higher RPM without failure.