So why is the LS1 less impressive?

 

what he said makes plenty of sense.

like you said..."power is derived from torque"...but you forgot its also derived from RPM aswell...what you said implied that RPM is basically a bandaid for too little torque, its really not. and dont get the honda mentality that more rpm = more hp...it doesnt.

the truth is the faster 500whp car is going to be the one that has the most torque to utilize at that 500whp. hell, just look at the 400-500hp diesel trucks like the F250's and 2500 Rams...your not going to put 2-3 tons of weight in your 400hp rx7 and run quicker or remotely close to what that diesel does. why? because they are making 800+ rwtq when they are pushing 400whp.


and there is plenty of info on forced induction V8's. I know a couple of people who have bone stock 03-04 cobra's who drive them daily since they bought them, my ex's dad has almost 200k on his and hasn't had any issues with it, i know this because i looked up the service records because i was going to buy it. I've seen plenty of high mileage GN's/TTA's, all be it they are V6's, still its a boosted piston motor.

turbo V8's are a dime a dozen nowadays...everyone is on the bandwagon. its the tried and true way to go for power. so you cant say there isnt enough info on them. and a turbo setup will not shorten the life of a motor when its done properly. if that was the case, manufacturers wouldnt make them and warranty them. Now when you try to take things past their mechanical limits, then yes you are going to see the shortened lifespan. My neighbor had a Nova II with a 6-71 on a 383, he drove that thing daily since 97 or 98. he still has it and still drives it. he is running 15# on it and it's never let loose on him yet about 80k miles later. and its a heads/cam blown motor. the thing that will shorten the life of a built motor is the competence of its owner and builder. I've put together a couple of motors for people who just wanted to be cheap and run alot of bottle on it...well they got what they paid for. I've also built motors for people willing to put out the extra coin for the proper parts, and they are still running around the streets.

 

Sneakin, as usual, I agree with everything you have stated. What you have said applies to all things mechanical. Be it piston or rotary.

~James

 

Well revs are the best option for small motors. That's why F1 cars (limited to a very small displacement) rev to the moon. It's the best option for making power. This past season, the rev limit for all cars was lowered (19K, I think) to try to discourage the cars from using revs in lieu of technology advancements.

 

+1 to the Deacon

 

i cant say for sure on the RPM limit they can run, i had watched a couple races and could have sworn some of the onboard telemetry was reading in excess of 20k rpm though, but may have been a previous years rerun they were showing.

but high revving motors are just another type of motor you have to build for though. you have to have the right parts in the right combinations. in a piston engine, alot of key factors come into play...when we are talking 10k+ RPM, piston speed becomes a HUGE issue..if they ran a bore/stroke/rod that we do on our cars, they wouldn't last 2 minutes. from what i know they run between a 3:1-4:1, bore:stroke ratio. for example, an 350sbc has a 3.48" stroke, and a 4" bore. they might have a 4" bore and a 1.5" stroke...they still use quite large pistons, but thats because the little stroke they have to run to achieve the rpm they want leaves them no other way to get the most displacement. in terms of piston speed...consider that a 350, at 6000rpm, is making that piston move at 39.5mph...that F1 engine with 1.5" stroke is moving its piston at 39.5mph...but it doesnt do it till ~14k rpm.

that is all the in and outs of knowing what your building a motor for and what you will be doing with it. there is alot more to it because i havent even mentioned the valvetrane or anything...but it does emphasize the point different engines have different purposes and should be built accordingly.

on a side note i dont think they are limiting the revs to make them seek advancements from technology though, i think they are doing it to just plain old slow them the hell down. i mean shit, they are 2.4's, making 750ish..while they dont have a lot of torque, 750hp will still make 200ft/lbs get up and boogity especially in that light chassis.

 

^Sort of to slow them down, but it was part of a few other mandates to try to make F1 cars utilize more technological advancements, and more specifically, more that could apply to real-world cars, such as the adaptation of regenerative braking.

 

Damn,I thought Deez was posting,until I seen the date...Talk about old school.

 

i still run across Dee from time to time.

 

This argument is so run out and dry, its just the same shit over and over again. IMO you can swap whatever the fuck you want to swap into your car, hence its YOUR car.. people need to worry about their own cars..

as far as deacon saying hes seen a stock cobra go 200k.. you can find some posts on rx7club of stock fd's doing that or CLOSE to...