V8 swap thread

[Adiabatic]

Yea well, i've been studying machine engineering / combustion engines in M. Sc. program for five years now so i might have bit "out of normal world" - view on these things.. Plus i'm huge BMW fan..

Well, then I'm glad to hear you fall mostly under the former category.

Be that as it may, I still don't think specific hp has a place in picking a swap, and neither does comparing BSFC curves (hey everyone check it out, my car makes less power, but uses less gas per hp!) and other general elitist waffleswaffleswaffleswaffleswaffleswafflesry.

Honestly, there's a time and place to get into the volumetric and adiabatic (hey username!) efficiency of an engine versus another, but the general point you're not getting is, and let me restate it, only mech-e's and entitled pricks care about such things in context of a thread about power vs. weight gain on a swap, and neither are correct in doing so.

Whether or not the BMW straight-6's have more specific hp output, the LS1 still has more ACTUAL output, with comparable weight and a layout better suited for center-oriented weight distribution anyways. It also can be FI'd if needed, as you seem to forget when talking about turbo applications of the BMW engines.

Basically, the only two reasons I can see you going this route are:

A: Not getting the overall picture
B: Getting the overall picture but trying to find bullshit reasons (although pretty sounding) to support your rampant favoritism.

All this coming from someone who's also a MechE/EE, with 2 years in the automotive engineering field, and becoming vastly tired of an N/A engine that flows 305cfm near redline, 120hp/L, and has a volumetric efficiency rivaling some early FI engines. All those impressive numbers with a pitiful 240 crank hp and 150 ft*lbs, that gets absolutely shit upon by my buddy's pushrod, leaf-springed C5 Corvette.

[E30_fiend]

This thread is full of fail.

What ever happened to a thread being informative? If we would have asked to argue about which car company makes a more efficient car the this thread would right on point. The point of this thread is to post info about V8 swaps and that alone.

If you guys are going to keep bitching and complaining about things like this then you should post this crap in Off Topic forum.




/thread




Taylor

[Iain]

Anyway, to the point which is, that best way to get power from E30 is to swap BMW 6-cyl engine (which all are quite same after all) and turbocharge it if it's not producing enough power as it is.

Superchargers and yankee-V8's are best left to shops' shelves.

Remove head from anus, then post.

[Jonsku]

i think the comment about the cummins motor did it for me. everything after that made me think your an idiot.
I have a cummins in my daily driven truck and get 23-24 mpg average with it.
my wifes 4.4 X5 gets 17mpg average.
now mr smarty pants, tell me how the BMW V-8 is a better more efficiant motor than the cummins?
the truck is heavier, bigger displacement and has more power on less fuel.
go ahead. tell me.

Oh well, are you seriously comparing diesel and gasoline engines? Sorry but you need to take your head out of your ass and face the facts.

Here's a comparison i made of the engines. Please read it couple of times before posting..

(Both cars are yearmodel 2009, datas taken from manufacturers' websites);

Diesels:
-BMW X5 35dA, 3 litres, 286hp / 580Nm, consumption (combined) 8,3 l/100km (28mpg)
-Dodge ram 2500 with Cummins B6.7, 6,7 litres, 350hp / 880Nm, consumption (combined) 22mpg = 10,7 l/100km

BMW makes 95,3 hp / litre whereas dodge makes 52,2 hp / litre. Brake specific fuel consumption is 0,049 g / kWh for BMW and 0,06 g / kWh for Dodge, which is over 20% bigger than in BMW.


Gasoline:
-BMW X5 4.8iS, 4,8 litres, 355hp, combined consumption 12,1 l/100km (19,4mpg)
-Dodge ram with 5.7 hemi, 5,7 litres, 383hp, combined consumption 17,5mpg = 13,4 l/100km

BMW makes 74hp / l, dodge 67,2hp/l. BSFC for BMW is 0,051 whereas it's 0,06 for hemi engine (17,6% bigger).

fair point... he is probably refering to the 6bt that came in Dodge trucks for the last 30 years

[e30s52]

Stripped rear end dude as in no plastic crap under the car, no rear seats or wireing, and spare tire with all accessorys gone.

Front of the car was m20, a/c, p/s. I was surprised at it too but they might be alittle off like maybe 2-3%

[z31maniac]

Its fine. Yeah last year I wieghed it and it was 50/50 or 51/49 with half a tank of gas. I was very surprised when I looked at the monitor. With my m20 it was 57/43 but that had a/c and some other stuff.

[SpecM]

fair point... he is probably refering to the 6bt that came in Dodge trucks for the last 30 years

[Jonsku]

hey smartass, he told you it has a Cummins

Yea, that just proves you can't think and read at the same time.

Did it occur to you that there might be different cummins engines, as there're different BMW engines .. ?

[SpecM]

Well well smartass, you could start by telling me which engine is in your truck and then i can tell you more about how bad it is.

hey smartass, he told you it has a Cummins

[Jonsku]

i think the comment about the cummins motor did it for me. everything after that made me think your an idiot.
I have a cummins in my daily driven truck and get 23-24 mpg average with it.
my wifes 4.4 X5 gets 17mpg average.
now mr smarty pants, tell me how the BMW V-8 is a better more efficiant motor than the cummins?
the truck is heavier, bigger displacement and has more power on less fuel.
go ahead. tell me.

Well well smartass, you could start by telling me which engine is in your truck and then i can tell you more about how bad it is.

[chadthestampede]

this thread just won't die.

[M3TROY]

i think the comment about the cummins motor did it for me. Everything after that made me think your an idiot.

+ 1

[Doughnut]

I'm soooooo over this thread lol!

[weaksauce]

Yea well, i've been studying machine engineering / combustion engines in M. Sc. program for five years now so i might have bit "out of normal world" - view on these things.. Plus i'm huge BMW fan..

Anyway, to the point which is, that best way to get power from E30 is to swap BMW 6-cyl engine (which all are quite same after all) and turbocharge it if it's not producing enough power as it is.

Superchargers and yankee-V8's are best left to shops' shelves.

i think the comment about the cummins motor did it for me. everything after that made me think your an idiot.
I have a cummins in my daily driven truck and get 23-24 mpg average with it.
my wifes 4.4 X5 gets 17mpg average.
now mr smarty pants, tell me how the BMW V-8 is a better more efficiant motor than the cummins?
the truck is heavier, bigger displacement and has more power on less fuel.
go ahead. tell me.

[Jonsku]

Sorry for quoting from the 1st page, but I had to get it out. Only powertrain engineers and misinformed elitist pricks with no real point give two shits about specific horsepower in this argument.

Not to say specific horsepower isnt a great gauge of the quality of engineering and tech that went into an engine, but when talking about what to swap into a car? Really?

Yea well, i've been studying machine engineering / combustion engines in M. Sc. program for five years now so i might have bit "out of normal world" - view on these things.. Plus i'm huge BMW fan..

Anyway, to the point which is, that best way to get power from E30 is to swap BMW 6-cyl engine (which all are quite same after all) and turbocharge it if it's not producing enough power as it is.

Superchargers and yankee-V8's are best left to shops' shelves.