weight distrubution with rb20/rb25

[thephatone]

okay so my friend is arguing that his sr20det in his 240sx ( race suspension setup ) will take a rb20/rb25det with same suspension, minor tweaks to compensate for the different weight of the motors, in canyon running, what weight distrubution are rb25dets guys getting? a sr20det in a 240sx gets almost a 50/50 correct? help me win this fight! or lose it =/

[cyris3d]

i can tell ya that my car with the rb25 weighs less then a hatch back with a sr20.. i weighed my car.. 89 couperb2517inch rimsfull interioritems left in trunk : extra optimum yellow top battery, floor jack, 2 anitfreeze jugs with water in em.. my old turbo. and misc tools..car weighed 2800 flat..

same nite.. friends 90 hatch backsr2015inch g20 rimsfull interior

2780

im guess without all that **** in my trunk.. it would have weighed around 2700lbs..

[thephatone]

how about weight distrubution, thats erally the answer im looking for, oh yeah do you have an email address? im looking for an rb25det swap =D

[thephatone]

argument with my friend has turned into a full all out war! he says rb20dets are a waste of time and money only rb26detts are worth it because anything else is gaysr20dets are better than rb20/25 because its lighter and has more potential he still thinks rbs are gayagh!!

[Nathan]

slap him in the face, tell him he is stupid, then laugh at his aluminum block, mock him for having a coke can engine. Screw weight distribution, it's all about the iron block!

[cyris3d]

[email protected]

[Joe]

your friend is a ****ing moron

[cyris3d]

argument with my friend has turned into a full all out war! he says rb20dets are a waste of time and money only rb26detts are worth it because anything else is gaysr20dets are better than rb20/25 because its lighter and has more potential he still thinks rbs are gayagh!!

no question , put it this way.. stock boost to stock boost.. my 7psi RB25det to my homies stock 7psi Sr20.. i walked him.. and traped(mph) about 10mph more then his..

[PROJECTRB240SX]

YOU ENGINE IS RUNNING THAT LOW OF BOOST? IT SHOULD BE AT 10PSI.

[thephatone]

he says i might be slower but ill outhandle you anyday...are rb25s and rb20s that much heavier to significantly affect handling?

[PROJECTRB240SX]

NO, THEY ARE 60 POUNDS HEAVIER THAN THE KA. THERE IS NO HANDLING DIFFERENCE.

[Joe]

dude you need to stop listening to your friend, he obviously has no idea what he is talking about.

he is probably just jealous he put a sr20 in without knowing a RB was possible.

[14.5drift]

more like a 160 heavier than ka. Bigger block, heads, and bigger trany. move the battery into trunk put some subs in there too, and get a carbon fiber hood and fenders.

[Nathan]

I sincerely doubt it's 160lbs. heavier than the KA...it's a .1 liter difference but in an inline 6 so the block is bigger but not an incredible amount, same with the heads and transmission...I'm with ProjectRB on this one, the difference is negligible.

[PROJECTRB240SX]

UM MY RB20 IS 60 POUNDS HEAVIER. THE ONLY DIFFERENCE IS REALLY THE WEIGHT OF THE TURBO.

[Joe]

lolwhat does displacment have to do with weight?

iron block with 2 extra cylinders and a bigger transmission.

it does weigh alot more than the KA motor.

[PROJECTRB240SX]

OK PUT IT THIS WAY, WITH THE RB20 COMPLETELY INSTALLED THE STOCK RIDE HEIGHT HAS NOT CHANGED AT ALL.

[Nathan]

Displacement has to do with weight because it's a similarly sized engine. If you will notice I DID say that it will be a bit more because of the extra 2 cylinders but I doubt it'll be too much. I can pick up my KA block pretty easily so I know it's not THAT heavy. I still stand by it not being a major difference, and definitely not one that cant be made up for in other ways.

[cyris3d]

the RB25 is a good 150+ lbs heavier then the KA.. if u look at my car.. with stock springs. my front is slammed..

http://www.lvracingscene.com/e...4.JPG

[thephatone]

hey cyris3d i called just now and i got your message, well just letting you know its me JJ =D

[14.5drift]

rbs block is about 6 inches longer and bigger all around, and its all iron. That prolly make the 100lbs, and the transmission pick up the extra 60 lbs. It can be balanced though. The sr block on the other hand is what were comparing it too and it is like a hundred or so pounds lighter than the ka. Plus it has more powa across the board. If weight is of virtue than your friend is right, but if you want skyline power with infanant possabilities, Maybe not for canyon runs, rb is way to go

[PROJECTRB240SX]

RBs are iron block/aluminum head. The transmission on the rb20 is exactly the same as the KAs.

[14.5drift]

oh forgot about the rb20 transmission. The 25 on the other hand got big transmission. I read some where that rb25det is 160 lbs over ka, but noone got any hard facts on rb20. Every body says it weighs a little less than rb25det. Pure speculation. I guess noone knows

[thephatone]

weight is the virtue of my friend but he said hell beat me anytime, if i were to setup my suspension correctly....what would be the outcome?

[wga240]

the RB25 is a good 150+ lbs heavier then the KA.. if u look at my car.. with stock springs. my front is slammed..

http://www.lvracingscene.com/e...4.JPG

Wow, that is low. After installing my RB20 I can't tell that my front ride height changed at all...the height looks exactly the same as the back. Surely the RB25 isn't that much heavier than the 20? Or maybe your stock suspension is just in much worse shape than mine?

Edit: Your car is much lower than mine all the way around. Are you sure those are stock springs? I've got about 2x as much wheel gap as you do in the back, and more in the front.

[cyris3d]

the gap in the back is crazy high.. cant really tell from that pic.. and the front is slammed.. that with stock springs and KYB AGX shocks

[14.5drift]

rear looked the same as front, shadow is deceiving but I could tell now that it alot lower in front

[AREITU]

I'm doing the swap in the near future. I'm going to try to weigh my car before and after the swap, both on a full tank of gas, to see how it compares. I don't think the difference in handling is that much unless the suspension is shot.

[JonPowell]

My car looks the same as before, I cant really tell a difference in handling at all (except I need an alignment). The height seems the same also. I have no idea what the difference in weight is, but I will try to find a definate answer for you this winter, might be pulling the motor again. As for hte weight of the trans, that will be shared by the front & rear suspension. I think this discussion is for the people who cant afford the RB and want to talk shiat about it. My car seems to perform exactly the same.

Thats a hell of a car there Cyris, good choice on the coupe.

[thephatone]

my friend is still being stupid but well see when i get my motor done...but cyris! no response to my email or my phone call but anyways, my suspension will be most likely teins or jics new suspension bushings, and yeah im planning to run 350hp on street and 400+ on the tracks!!! thanks everything for their information who in southern california does rb swaps? i called and emailed cyris because hes only 3-4 hrs away but yeah anyone?