Weight of Motor??? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Crab Walker · 10-15-2003, 03:06 PM

Alright, I aready tried the search button and came up with nothing on this one... So I was wondering if I can get some help on the weight of an sr20 compared to a ca18et. I figured the ca18 might weigh more from its cast iron block oppose to the aluminum sr20 block, but Im really not shure...

Does anyone know the weight of the motors or know a site that has a weight chart???

RedlineRacer · 10-15-2003, 05:50 PM

Not too much difference. The SR block is still heavy because they had to reinforce it alot to make it stronger.

*AceInHole* · 10-15-2003, 06:44 PM

Quote:

Originally posted by RedlineRacer
Not too much difference. The SR block is still heavy because they had to reinforce it alot to make it stronger.

Not to mention the head is also heavier from the need to accomodate a more complex valvetrain.

240Dave · 10-16-2003, 09:20 AM

What is more complex about the sr valvetrain vs the ca?

cosmo · 10-16-2003, 11:38 AM

The SR has a rocker-arm assembly which adds valvetrain mass, while the CA has a direct cam-on-bucket desing, which allows lighter valvetrain, hence the higher revving ability over the SR.

Crab Walker · 10-18-2003, 05:22 PM

So your saying the SR is heavier then....?

cosmo · 10-18-2003, 06:00 PM

I would imagine the CA is lighter than the SR, but I have seen no #'s on how much the CA weighs, but I know the SR with tranny, turbo, and alternator weighs 493 lbs. (SCC)

But I don't think the SR weighs tons more than the CA, probably an insignificant amount, but who knows, the CA might be heavier than SR.

But in my mind the CA owns SR.

RedlineRacer · 10-18-2003, 08:01 PM

Yeah, if I ever do a motor swap, it will be the CA. I just wish the CA had more US support.

cosmo · 10-20-2003, 05:38 PM

It's got pretty decent US support. Unless you mean performance stuff, which there's not exactly a plethora of parts, but if you know where to look, you can find it.

10-15-2003, 03:06 PM	#1
Crab Walker Leaky Injector Join Date: Oct 2003 Location: Motor City Detroit Age: 39 Posts: 133 Trader Rating: (0) Feedback Score: 0 reviews	Weight of Motor??? Alright, I aready tried the search button and came up with nothing on this one... So I was wondering if I can get some help on the weight of an sr20 compared to a ca18et. I figured the ca18 might weigh more from its cast iron block oppose to the aluminum sr20 block, but Im really not shure... Does anyone know the weight of the motors or know a site that has a weight chart??? Last edited by Crab Walker; 10-15-2003 at 03:51 PM..

10-15-2003, 05:50 PM	#2
RedlineRacer Zilvia FREAK! Join Date: Sep 2002 Location: Clemson, South Carolina Age: 40 Posts: 1,054 Trader Rating: (0) Feedback Score: 0 reviews	Not too much difference. The SR block is still heavy because they had to reinforce it alot to make it stronger.

10-16-2003, 09:20 AM	#4
240Dave Zilvia Member Join Date: Aug 2003 Location: . Posts: 241 Trader Rating: (0) Feedback Score: 0 reviews	What is more complex about the sr valvetrain vs the ca?

10-16-2003, 11:38 AM	#5
cosmo Join Date: Feb 2003 Location: Des Moines Posts: 17 Trader Rating: (0) Feedback Score: 0 reviews	The SR has a rocker-arm assembly which adds valvetrain mass, while the CA has a direct cam-on-bucket desing, which allows lighter valvetrain, hence the higher revving ability over the SR.

10-18-2003, 05:22 PM	#6
Crab Walker Leaky Injector Join Date: Oct 2003 Location: Motor City Detroit Age: 39 Posts: 133 Trader Rating: (0) Feedback Score: 0 reviews	So your saying the SR is heavier then....?

10-18-2003, 06:00 PM	#7
cosmo Join Date: Feb 2003 Location: Des Moines Posts: 17 Trader Rating: (0) Feedback Score: 0 reviews	I would imagine the CA is lighter than the SR, but I have seen no #'s on how much the CA weighs, but I know the SR with tranny, turbo, and alternator weighs 493 lbs. (SCC) But I don't think the SR weighs tons more than the CA, probably an insignificant amount, but who knows, the CA might be heavier than SR. But in my mind the CA owns SR.

10-18-2003, 08:01 PM	#8
RedlineRacer Zilvia FREAK! Join Date: Sep 2002 Location: Clemson, South Carolina Age: 40 Posts: 1,054 Trader Rating: (0) Feedback Score: 0 reviews	Yeah, if I ever do a motor swap, it will be the CA. I just wish the CA had more US support.

10-20-2003, 05:38 PM	#9
cosmo Join Date: Feb 2003 Location: Des Moines Posts: 17 Trader Rating: (0) Feedback Score: 0 reviews	It's got pretty decent US support. Unless you mean performance stuff, which there's not exactly a plethora of parts, but if you know where to look, you can find it.