is weight worth hp???

[wherearemypants]

ok... here's the prob... sr is a little bit more expensive... ca is light... what is better... what are the weights with transmission and everything... i'm buying one or the other very soon, so i wana know what to do... i heard that the ca's sound better too... i have no clue... let me know

thx guys...

---wherearemypants---

[c-rad]

CA and SR weigh about the same.

[Kouks]

NO...........The Ca however sounds way different and with a bigger turbo can make just as much power.

[The_Chosen_One]

CA weighs 40 LBS lighter than the SR. But yes weigh will aide in hp.

[c-rad]

CA weighs 40 LBS lighter than the SR. But yes weigh will aide in hp.

Actually, no. Weight has nothing to do with HP. Its all about HP/weight ratio. If a 2800 pound car makes 200whp and you remove 200 pounds of weight, it will still make 200whp.

[dekansnowman]

Yea, we know what you meant. But yea, weight will take away from speed and agility. My exhaust came with an silencer that looks like a giant mug to slide in and out. With it in, it sounds like poop ricer.. With it out..I've had mixed reviews, everything from 'mean for a 1.8' to 'almost like a hayabusa' so I'll let you be the judge after I make a vid.

[The_Chosen_One]

Actually, no. Weight has nothing to do with HP. Its all about HP/weight ratio. If a 2800 pound car makes 200whp and you remove 200 pounds of weight, it will still make 200whp.

you know what I meant douche

[themadscientist]

I would not pick a motor based on weight unless the motors in question were a 4AG -vs- a 454 big block. That is a pretty substantial difference. 100 lbs or less, not worth worrying about.

[sideways danny]

CA weighs 40 LBS lighter than the SR.

inncorrect. The SR is actually very slightly lighter. there's a thread about it on SXOC somewhere

[The_Chosen_One]

you sure? Cause of all the articles I've seen when they did weight comparisons, across a lot of Nissan 4 bangers that the CA was lighter by 40 lbs than the SR.

[iliketocrash]

i've read that the CA is lighter as well.

[sideways danny]

http://www.sxoc.com/vbb/showth...eight

[iliketocrash]

well at least it still proves that either way the weight difference between the two is still minimal. and actually even less than what was previously thought.

[davidricardo86]

Well it looks like theyre really not the far apart from each other. I probably would not hold "weight" against either of the two. I say find something else to be picky about. With so many other variables like the parts that still need to be added, the results would probably change a little once again.

This is actually not too surprising because since both engines came in the same car, the S13 Silvia, Nissan probably wanted to keep the weight about the same as to not alter the driving feel or characteristics of the car too much. Just my two cents...

[themadscientist]

R32 Skylines came with RBs or CA18, Z31 fairladys came with VGs or RBs, Nissan doesn't care.

[davidricardo86]

R32 Skylines came with RBs or CA18, Z31 fairladys came with VGs or RBs, Nissan doesn't care.

R32 Skylines came with RBs and CAs really? Wow thats something i did not know and THAT surprises me. What version of the CA was it?

[redtop91]

Correction CA20S for R31 at least

[themadscientist]

Correction CA20S for R31 at least

Corrected correction, CA18i for R32 as well. It's called a GXi. If it came in a two door I would swap a CA18DET in it but they only came four-door. Ah the 8-plug CA, yikes!

[Chris859]

On the weight issue... 40lbs isnt much performance wise. I believe the rule of thumb is - every 100lbs you remove, gives the same performance increase you would get from adding ~10hp. Looking at it this way, a matter of having "4hp" more(which is still less stock hp than an sr)... shouldn't be a deciding factor on which engine to choose. Honestly, I have driven cars with both ca's, and sr's... I love them both equally. I am currently running a ca18, but in the future I might swap to a different engine - who knows. But for now, I am plenty happy with my ca18... On a side note, ca's aren't plagued with a crappy valve train design like sr's.

[ca20det]

IMO if you think 40 pounds isn't much... why then people pay 600$ for carbon fiber hoods, trunk lid fenders, and even more for doors... weight reduction isn't useless..

[themadscientist]

I think at least 80% of the people who buy those do it for style not function which is fine too.

[dash]

weight of the hull is a big deal tho.Quickest ca18 on this forum runs only 16-17psi thru an unopened motor.Full weight daily driven rwd toyota starlet. 11.1sec is a tick off a 10sec ride, impressive acceleration for such small input, that you couldn't attain any other way.Same reason why I chose a ca18 as a perfect match for my ae86 rolla.Select your target then copy a combination... eliminate the guesswork

[wherearemypants]

here's the deal... motor for motor swap for swap... is the work the same??? is one easier than the other... what about the aftermarket??? i understand that the sr is seriously backd by aftermarket parts... here's what it is

SR20DET Red Top... btw, what is the diff in the black top??? i found that too...$1,895.00 Motors average 35,000 miles and come with a 100% start up warranty.Engine Package Comes With:•Complete Motor•Throttle Body•Transmission 5Spd RWD (with Clutch Assembled to the engine)•Wiring Harness•All required Cables•ECU•Exhaust Manifold•Alternator•Starter•Power Steering Pump•Power Steering High pressure Line•Wastegate solenoid Controller•Wastegate actuator•A/C•Fuel Rail•Injectors•Canistor•Turbo•For Ignitor Chip, Master Air Flow (MAF), Air Cooler, Pipping Please add $595.00 to the total and call for availability. $1,395.00ca18det Motor with the turbo Transmission (5sp) Wiring Harness Cables ECU Cam angle sensor (CAS) Complete Intake Manifold Alternator A/C Power Steering Pump Brackets and Sensors

what else will i need for a ca18swap... with free shipping these prices are pretty good too right???... all help appreciated... i posted nearly the same on the sr forum too with a little diff imput... u guys are awesome thx for the help...

---wherearemypants---

[240sxbobbis]

my 2 cents weight is a factor my white car which was gutted out like none other was agile and nifty >>>>>> but now a ghost compared to my new car which is weighted i notice the difference in driving cornering drifting etc not alot but my 2 cents

[yourmomsrps13]

hmm very interesting, my RS*R race springs sit the car up higher with the CA then with the SR, i can only imagine thats from wieght

[BACARDI_DWB]

also from the looks of it the engine sits further back but i may be wrong. the further back the motor sits the "lighter" the front of the car gets.

[Fenvy]

40lb is nothing..... hell I should just lose 40lb

[redtop91]

40 lbs won't make much of any difference. Weigh under 100lbs as an argument for or against anything in an S is stupid. A full tank of gas for an S weighs close to 100 lbs.

[Fenvy]

really? that's heavy. The capacity is around 13 gallon right?

[redtop91]

Yeppo. I underestimated it at 100 too. I took the weigh of one gallon of distilled water as a baseline of about 8.3 lbs. Since gasoline isn't pure however it probably weighs a bit more but for arguments' sake 8.3 will do. 8.3x13=107.9 lbs