RB Engine weights

[Siddhartha]

How much do these RB engines weigh? I'm worried about creating too much push with an rb25det swap. Would a carbon-fiber hood and battery relocation help?TIA

[Daunttless]

yeah, they would, but the difference is not too terribly significant. : )

[SpeedingMonk]

i have this theory that a lighter hood will infact lighten the frount end.... i like my fount end on the ground where it should be the 240 is a master peice the way it is if ur gunna get a carbon fiber hood lighten the rear end

[APEXi240]

It's not a theory, that's the whole purpose of a CF front hood. The whole reason to lighten the front end it to make the weight all even. I don't know the exact weight distribution on a 240, but I'm sure its not 50/50, so lightening the front and get it closer to 50/50 is a good thing, not a bad thing. Lightening the rear will theoretically make the car break away easier, so if you are going to lighten anything it should be the front. Especially if you put in a heavier RB engine.

[SpeedingMonk]

"Lightening the rear will theoretically make the car break away easier," wouldnt physics tell use that the more waithgt in the rear end is just more waight to trough around the corner an lose traction? its the dynamics of volisity and cornering the faster u go on a corner the easeyer it is to brake traction (and drift)

the 240 handels like theres no tomarrow keep the waight distributon the same if u lighten 1 lighten the other

[Nismo_Freak]

240SXs have 51/49 distribution...

[Daunttless]

S13s with a SR20 supposedly have 51/49.

S14 with a SR20 supposed have a 55/45.

[APEXi240]

As far as drifting, more weight in the rear makes it harder to drift (of course not in all cases....)

I didn't know the distribution was so great...But since the US 240s have KAs, a CF hood would make up some of the weight on the iron block, seeing as a hood doesn't take off THAT much weight.

But screw all that, if you're a hardcore racer, gut the whole thing. I had an 85zxt that I did that too, and I took off about 200lbs of "crap", plus it sounded so much meaner on the inside, I miss the sound of the turbo hissing....

[Daunttless]

Well between the AC and the hood and other misc components you could drop 100 pounds off the front end pretty easy, the RB26 is not much heavier than a KA, sure you gain some weight in the turbos but you can make them up with other components. : ) Plus, the Quadruple Decker Solid Steel knockoff of those Sexy Aluminum wings that I add to the back will help with weight distribution. I'm told because the steel weighs so much it will help with the downforce, not only is it as cool looking as those aluminums but its so much more functional. : )

Hehe, in all seriousness I'll weigh a KA, SR, CA, RB25, and RB26 when they come in and have some solid figures since its a common question. : )

[SpeedingMonk]

~~ DISCLAMER ~~

now some of it is lazy ness an some of it is just the fact that im not the best speller there is. im sure u will find misspellt words among my replys but i schall try my best to make sure its pretty OV-E-ISS what im trying to say. ty (thank you)

"Nismo_Freak 240SXs have 51/49 distribution... "

i not sure where u got that but next time u open ur car door look on the manufact lable on the door jam .51 / 49 i would assume is frount / rear, but its 45.5 (frount) / 54.5 (rear) any way.

"Daunttless S13s with a SR20 supposedly have 51/49.

S14 with a SR20 supposed have a 55/45. "

i cant speek for the sr but my s13 se is 1848 frount / 2200 rearso it would feel like a totaly different car ( handeling wise) unless the smaller block some how knoks an extra 10% wheight to the frount end...

"APEXi240 But screw all that, if you're a hardcore racer, gut the whole thing. I had an 85zxt that I did that too, and I took off about 200lbs of "crap", "

I plan to take off my compressor and all the a/c parts +D I al ready cut the belt to the compresser off (theres only 2 belts 1 crank - idler pully - compresser, and the other is every thing else it did seem to take a bit of a draw off the crank tho than again the compresser berrings were seizing as well....)

"ty come again" apu

[Daunttless]

Explain to me how if you have two fair equal portions of metal frame and paneling, that one side has a giant hunk of metal in, and the other side has trunk space in, that the trunk space will be heavier...?

[SpeedingMonk]

i would but im not so i cant but i can read books an door jams go check for ur self

[SpeedingMonk]

Daunttless Explain to me how if you have two fair equal portions of metal frame and paneling,"

well if thay were equal the frount end would look like the a** end...

"...that one side has a giant hunk of metal in, and the other side has trunk space in, that the trunk space will be heavier...? "

do u know where EXACTLY thay draw the line between frount and rear? behind the driver seats? in the middle of the farthest part of the frount and the farthest part of the a**? how bout the wheelbase, is the middle of that the middle of the car???

i "donno" just read the door jam man........

[Daunttless]

they draw the line at the front seats, with an average weight of 60kg for the driver added on to the front end. : )

[SpeedingMonk]

so does thismean u still dont beleve me?

[APEXi240]

Yes, I still don't believe you. There is no way the front is lighter than the back. There is a 400+ pound motor in the front. No FR is gonna be lighter in the front.

[EZcheese15]

Actually, they weigh the car on 4 pads. So if the front two say 2000 and the rear two say 1000, then that is what they put on the door They don't "draw a line" anywhere.

And I also agree, that there is no FR car that is lighter in the front, atleast not a production car. Especially considering you would have to strategically engineer that kind of weight distribution, and since 50/50 is perfect, they wouldn't try to get the weight in the rear any more.

[Daunttless]

haven't you seen the brochures. Theres a line right behind the driver Torry. =P

[EZcheese15]

Well, my point is, it's not like they cut the car in half and weigh the front half, then the rear.

[Daunttless]

Yeah they do Torry, haven't you seen the line???? : )

[EZcheese15]

Yeah, I forgot...it must be just like that article in SCC where they made a stock 01 Sentra run 14.1 in the 1/4.

Just take a saw, cut down the middle, and weight each half

[Daunttless]

How else would you get.... THE LINE!

: )

[APEXi240]

I LOVED that SCC article, that was soooo funny. But what I don't get was, was it really someone's Sentra? How pissed would that kid be? He had to be compensated, and they needed his permission, right? I just wondered about that stuff, but that article was TOO funny.:ylsuper

[EZcheese15]

I LOVED that SCC article, that was soooo funny. But what I don't get was, was it really someone's Sentra? How pissed would that kid be? He had to be compensated, and they needed his permission, right? I just wondered about that stuff, but that article was TOO funny.:ylsuper

That was a preproduction car that was gonna get scrapped anyway. Much like the famous "disco potato," which kojima is trying to keep from getting crushed

[ItzGenX]

LMAO

Oh by the way..... I know that they weigh cars (for official purposes) with empty gas tanks and excluding the passengers + drivers. Come to think of it, he must have a 40 gallon gas tank or something to make the rear heavier lol.

[EZcheese15]

LMAO

Oh by the way..... I know that they weigh cars (for official purposes) with empty gas tanks and excluding the passengers + drivers. Come to think of it, he must have a 40 gallon gas tank or something to make the rear heavier lol.

Actually, they measure it with a full tank of gas, and 200 lbs per seat belt (150 to simulate a person, 50 to simulate luggage). So if you have a 4 seater car, they add 800 lbs to the actual weight then stamp the new figure as "gross weight" on the door jam.

[Chris69427]

No way, "gross weight" is including passengers?! I always thought that was an empty car... maybe my trans am doesn't weigh that much!

By the way, if the front end did weigh less than the rear, the 240sx would launch with its wheels up if it had an sr20det and you'd never spin your wheels on a launch! So I highly doubt a front engined car has more weight in the empty trunk than in the engine bay...

[SpeedingMonk]

ok guyz since none of u seen to believe a word i say...u all made me go hunt down my digital cam drivers. i have 2 last questions....

1 Did any one even bother to look or call the dealer?2 do u believe me now?

[APEXi240]

3619lbs for an S13, haha, thats heavier than my friend's V8 Mustang. 2200lbs for the rear? That's 500lbs short of the TOTAL weight of my S14.

I don't know what those numbers are for, but they are like that on my car, and I know that my rear end is lighter. If everyone else thinks the rear is lighter and you're the only one that thinks the front is lighter, don't you think you could be wrong??

I would like to know what those numbers are for...

[EZcheese15]

First of all, Apexi....read my previous post about how the weights are calculated. 3600lbs is normal for the gross weight.

Second of all, something is wrong with that plate. I gauruntee your front half of the car weighs more. And more importantly, add the FR and RR weights. What do you get? I can tell you right now it's not the same as what the total says. I don't know what's up, but I'd say something is printed wrong.