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Old 12-16-2010, 11:06 AM   #1
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Cool Boost Addicts SR20det engine conversion

First and foremost, if you don't like, agree with, or understand why i would do this swap, you can gtfo. I am doing this because it's fast, cool and unique.. Not because of the opinion of some Internet voice....

A bit of background; my name is Zander, I'm 19, and currently working I a machine shop. My boss let's me work on whatever I want after hours. I was previously planning on an fe3n turbo engine conversion, however circumstances changed. I was traded the engine for a 700$ turbo, and I saw the potential; all aluminum block, huge aftermarket, and of course, a tranny that can hold some real power. *Currently the engine has 264 cams, pistons, bigger injectors, and a real greddy intake. *Still has the stock t25 for now.

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To fit this engine is not as bad as it would seem. *With the cas positioned how it is on the bp, you loose firewall clearance. *The sr does not have this issue, and will come forward in the engine bay just as far as the bp. *The shifter even sits just an inch farther back than stock, which is really kind of nice..

Current list of mods to make it fit include:

-converting the oil pan from its front sump design to a rear sump
-drive shaft
-motor, tranny, and diff mounts
-vmount setup (not required)


I started by cutting the oil pan down, and machining a nice clean flange for me to build off.*

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Fabbed up the walls
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Little drain bung

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Currently just needs some welds!

Updates soon.

Last edited by Boost_addict; 12-25-2010 at 11:24 AM.
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Old 12-16-2010, 11:11 AM   #2
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Welcome!

Very nice start on what looks like a promising build.

What are you doing about a rear end? I'm assuming you can make your own driveshaft.
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Old 12-16-2010, 11:13 AM   #3
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I see v-mount setup. You better not be one of these V-mount guys that acutally do a 7-mount...where the trend lately has been laying the IC flat if not even titled forward.

looks like good work far!
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Old 12-16-2010, 11:17 AM   #4
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Quote:
Originally Posted by Boost_addict View Post
First and foremost, if you don't like, agree with, or understand why i would do this swap, you can gtfo. I am doing this because it's fast, cool and unique.. Not because of the opinion of some Internet voice....
Just because.... this swap is not worth it for motor buy in vs benefits vs cost.

Woot!
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Old 12-16-2010, 11:25 AM   #5
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Quote:
Originally Posted by gospeed81 View Post
Welcome!

Very nice start on what looks like a promising build.

What are you doing about a rear end? I'm assuming you can make your own driveshaft.
Keeping the LSD for now, have a drop in rx7 diff for when it blows.

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I see v-mount setup. You better not be one of these V-mount guys that acutally do a 7-mount...where the trend lately has been laying the IC flat if not even titled forward.

looks like good work far!
No ******* way! Lol Ducting will be in order as well.
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Just because.... this swap is not worth it for motor buy in vs benefits vs cost.

Woot!
Idk if you heard when I said it cost me 700$.
Labor is free (well, time = money but w/e)
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Old 12-16-2010, 11:27 AM   #6
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Idk if you heard when I said it cost me 700$.
Labor is free (well, time = money but w/e)
I don't think you heard me
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Old 12-16-2010, 11:34 AM   #7
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nice work what tool did u use to bend the aluminum like that ...a brake ?
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Old 12-16-2010, 11:38 AM   #8
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Quote:
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I don't think you heard me
Ahh yes, you're right. Thank you
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nice work what tool did u use to bend the aluminum like that ...a brake ?
Just put it in a vice and hit it with a mallet. A bit time consuming, but not hard.
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Old 12-16-2010, 11:42 AM   #9
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I love the custom pan work btw. I debated doing that for my build, but I'm just going to customize the subframe to deal with it all. Didn't want to run into sealing issues and the pan design on the VQ is bit different also.

I don't see it in the pics... but are you bolting the pan down to anything? (spare block/thick steel etc...)
I'd really recommend that to avoid warping, even if you are spacing your welding from side to side and stuff.
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Old 12-16-2010, 11:51 AM   #10
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I love the custom pan work btw. I debated doing that for my build, but I'm just going to customize the subframe to deal with it all. Didn't want to run into sealing issues and the pan design on the VQ is bit different also.

I don't see it in the pics... but are you bolting the pan down to anything? (spare block/thick steel etc...)
I'd really recommend that to avoid warping, even if you are spacing your welding from side to side and stuff.
We have a lot of tools here. The welding table is like a grid so you can stick clamps in it; hold it down from every edge. Also, VQ? Build thread?
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Old 12-16-2010, 11:53 AM   #11
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We have a lot of tools here. The welding table is like a grid so you can stick clamps in it; hold it down from every edge.
Good deal
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Old 12-16-2010, 12:06 PM   #12
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[flamesuitON]Subscribed, because I like SR20's better than that lump in my Miata.

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Old 12-16-2010, 12:13 PM   #13
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I don't understand why everyone is so defensive: the only hate towards sr swaps that I know of in here was in that retarded "sr swap bracket kit" thread where they basically wanted 2k for it.

I don't think there's anything wrong with an sr swap if you absolutely want to do it and do it right.


That said good start OP. What churbo you plannin to use with that setup?
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Old 12-16-2010, 12:14 PM   #14
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Cool project, now baffle that pan.
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Old 12-16-2010, 12:16 PM   #15
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Quote:
Originally Posted by 18psi View Post
I don't understand why everyone is so defensive: the only hate towards sr swaps that I know of in here was in that retarded "sr swap bracket kit" thread where they basically wanted 2k for it.

I don't think there's anything wrong with an sr swap if you absolutely want to do it and do it right.


That said good start OP. What churbo you plannin to use with that setup?
Wasn't it over 3k?
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Old 12-16-2010, 12:17 PM   #16
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I think it's interesting...and have seen some nice ones. I don't get pulling your 2.4L motor out of the SX for this, but makes sense in old 510s, early Z cars, and Miatas.

Lot of work for a little more potential, but the character of the motor is much more fitting to the Miata.
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Old 12-16-2010, 12:34 PM   #17
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Quote:
Originally Posted by 18psi View Post
I don't understand why everyone is so defensive: the only hate towards sr swaps that I know of in here was in that retarded "sr swap bracket kit" thread where they basically wanted 2k for it.

I don't think there's anything wrong with an sr swap if you absolutely want to do it and do it right.


That said good start OP. What churbo you plannin to use with that setup?
That kit is too expensive. Eventually think a twin scroll gt30 would fit on real nice, along with custom Mani.

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Cool project, now baffle that pan.
Being baffled!
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Old 12-16-2010, 01:11 PM   #18
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Quote:
Originally Posted by gospeed81 View Post
Lot of work for a little more potential, but the character of the motor is much more fitting to the Miata.
Yup. Honestly, when I drive my wife's G20, which I think weighs somewhere in the 2700 lb range, I can't help but wish my Miata had that motor. An SR20 with bolt ons would be plenty of fun, usable power...
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Old 12-16-2010, 01:16 PM   #19
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Quote:
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Lot of work for a little more potential
More than just a little. A set of JWT S4 cams, larger injectors, and a T28 will get you 300whp easy. Make it a GT2871 and it's more like 400whp. This is on a stock bottom end, no headwork, and with a stock cast iron exhaust manifold.

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Old 12-16-2010, 01:21 PM   #20
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Can you get parts for this engine at the neighborhood parts store?
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