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Sr20 Swap Into A R32 Shell

clip14

By clip14,
in Engines & Forced Induction

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clip14 Rising Star

clip14

Posted
Posted

I want to put a sr20de (+t) later on

first of all

does anyone know exact weights between the sr20 alloy block and the rb20 iron block?I had initially wanted to use a sr20de s13 as a track car, but now am looking at skylines.

the sr20de powered s13 with manual transmission weighs in at 1110kg

the rb20de powered r32 with manual transmission weighs in at 1210kg

so if the iron block rb20 engine weights atleast 100kg more than the sr20 alloy block

then I should be fine in terms of weight. weight distribution for the sr powered r32 would be better as well.

does anyone have a guide, for the part ill need for a sr20 swap into an already manual r32 skyline?

i know meggala has done this before, but i need further technical details.

so yeah. what are the weights of the rb20 and the sr20

and what are the parts things i need to have for the swap?

Cheers

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Adriano Grand Master

Adriano

Posted
Posted

Im pretty sure there isnt 100 kg between the two, being that an rb20 short motor only weighs about 100 kg. Usually the conversion is done in conjunction with moving the motor back, this along with the shorter motor move a lot of weight off the front axle. It also allows you to move the rediator/intercooler back as well. Just hope your ready to modify the firewall if you wish to make the most of the transplant. One r32 i saw in japan with an sr20 stroker had the waerpump inline with the base of the windscreen.

Roy Grand Master

Roy

Posted
Posted

An RB20 couldnt possibly weigh 300kgs. Maybe with turbo, gearbox etc all hooked up it might get close. I moved an RB26 block with the help of a friend, and one person can easily lift the head. So im guessing the RB20 weighs about 160kgs ?!?!?!? I have heard that the SR20 is actually the same weight as the CA18?!?!?! Perhaps the SR20 is still a heavy thing iwth its steel liners etc etc

r3240sx Enthusiast

r3240sx

Posted
Posted

The SR20 is heavier than the CA18.

I havent personally weighed them, I remember a thread on HybridZ, I believe, that said the weights of certain motors.. The CA18 is physically smaller, which I believe makes up for the heavier Iron used in the block.

"Often referred to as the four cylindered RB engine"

"Due to superior head design (cam on bucket, as opposed to the flawed complex and heavy rocker arm actuation of later motors like the SR and QR), many enthusists consider the CA18DET to be the best engine platform since the FJ20ET that powered the legendary DR30 Skyline DOHC-RS."

Why an SR lol...

clip14 Rising Star

clip14

Posted
  • Author
Posted

hehe

thanks for all the suggestions!

but I'd really like to know about the weight differences between the sr20 and the rb20, if anyone has the figures.

sure I've thought about using a lighter chassis like an escort, but to be honest, I want to race a car which i like and like working on, so I've chosen the skyline.

also working to a budget here and skyline shells are cheap as chips and so are sr20de engines. (nz)

discopotato03 Grand Master

discopotato03

Posted
Posted

1600-2000cc class is quite easy , its called Mazda MX5 . 50 50 weight distribution and suspension better than a lot of things of the box . Huge following in the US so just about everything out there for them . They call them Mazda Miata over there and theres about a fortnights reading at their various sites . Given a choice the slightly later BP18 powered car is the pic .

Sold here and really clean examples dot the countryside .

Only 2 seats but perfect for a club racer without lots of lard , cheers A .

Beer Baron Grand Master

Beer Baron

Posted
Posted

best idea is to ring a wrecker and ask them. they will have a pretty good idea. from my experience I would say the RB20 is about 20-30kg heavier than an SR, but not more than that.

STATUS Grand Master

STATUS

Posted
Posted
The SR20 is heavier than the CA18.

I havent personally weighed them, I remember a thread on HybridZ, I believe, that said the weights of certain motors.. The CA18 is physically smaller, which I believe makes up for the heavier Iron used in the block.

"Often referred to as the four cylindered RB engine"

"Due to superior head design (cam on bucket, as opposed to the flawed complex and heavy rocker arm actuation of later motors like the SR and QR), many enthusists consider the CA18DET to be the best engine platform since the FJ20ET that powered the legendary DR30 Skyline DOHC-RS."

Why an SR lol...

Nah sorry i build a few CA's and alot of Sr's. I dropped the latest CA build to Drift garage/UPgarage in nsw last week and i cannot lift the 'long' CA at all.... the SR on the other hand i can manouver around my workshop my self.

the 26 in our s13 puts about 30-45kg more over the front axle.

clip14 Rising Star

clip14

Posted
  • Author
Posted

cheers for those numbers, thats what im looking for.

the silvia is a lighter car, but a lot of the weight advantage it has over the skyline is because of the lighter engine.

As i said above the difference between a sr20de s13 and a rb20de r32 is only 100kg. so if your numbers are correct, the chassis weight difference is only 20kg.

by running the sr20de in the r32, the centre of weight is shifted towards the centre of the car which results in better handling.

I would go for a silvia if I could find one in decent condition! there are plenty of manual non turbo r32s around so it seems like a good option.

Beer Baron Grand Master

Beer Baron

Posted
Posted

but hang on a minute. now you are comparing SR20 motor AND gearbox to an RB25 motor and gear box. I would say there is definately a weight difference in the box, and RB25 is heavier than RB20 (granted not by much).

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