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Datsun 1200 Ute B122 - Building an 11sec ute?? Which way to go?
Not too shy to talk
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2011/1/27 23:24
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Hi Guys,

I have just bought a 1200 ute and started working on the body for now. It has a fair bit of rust.

Im going to do an engine conversion and was just wondering if the sr20det conversion is worth doing over the ca18det since im looking at doing 11secs down the quarter. Ive seen that the SR conversion is pretty tight and i guess it involves a lot more work.

Any advise will be much appreciated.

Also, if doing the CA conversion, do i have to modify the trans tunnel?

Thanks guys.

Posted on: 2011/2/3 23:50
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Re: Datsun 1200 Ute B122 - Building an 11sec ute?? Which way to go?
No life (a.k.a. DattoMaster)
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ive done the CA conv, i fitted a 1200 auto tunnel, with SR conv i think you mite find abit harder to engineer.....i think, i contacted our engineer here he was saying 1.9ltr is the biggest cc's to use

Posted on: 2011/2/4 0:50
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Re: Datsun 1200 Ute B122 - Building an 11sec ute?? Which way to go?
No life (a.k.a. DattoMaster)
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In a 1200 using the s13 gearbox, both sr20 and ca18 needs trans tunnel mods.

Most people do CA18 because it is easier to road register in Australia.
Other people make up other excuses why they use the CA18 over the SR20.

If you are not getting it registered, go for the SR20 would be my choice.
- more new parts
- newer 2nd hand parts

SR20 is not a lot more work.

Posted on: 2011/2/4 0:50
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'71 Green 1200 Sedan CA18DET Project 99.98% complete
'71 White 1200 Sedan 20,000mi + A14T (twin 40DCOE 30/70 cam, extractors)
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Re: Datsun 1200 Ute B122 - Building an 11sec ute?? Which way to go?
No life (a.k.a. DattoMaster)
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I chose the ca mainly because if i ever want to register the car its poissible, the sr20 is a no go in nsw.
I also prefer the ca to the sr, a much better engine imo.. im not really an sr fan.

And as for doing 11's with a ca... easy done! simple bolt on mods will net you an 11 with ease

Posted on: 2011/2/4 2:01
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Its been years.. but finally another 1200 drag car build in 2018!!
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Re: Datsun 1200 Ute B122 - Building an 11sec ute?? Which way to go?
No life (a.k.a. DattoMaster)
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11 sec 1200 = sr20 imo

Posted on: 2011/2/4 2:03
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Re: Datsun 1200 Ute B122 - Building an 11sec ute?? Which way to go?
No life (a.k.a. DattoMaster)
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If you want a straight up answer over which engine is better, the sr20 is going to be the truth, and by some margin. don't get me wrong the ca18 isn't 'bad' by any means, just that the sr20 is particularly resilient to a fair bit of boost on a pretty much standard un-opened motor as long as you get enough fuel and keep the intake charge temps down.

Of course, as everyone says, the rego is the issue. Not easy to get the dattos rego'd with a boosted sr20. Now no way in hell am I suggesting this idea - but some people out there might 'cheat' and register/engineer it with a NA sr20 (or what looks like one) and then put the turbo gear back on there, but you'll be up the creek without a paddle if you are in an accident - even if the illegal engine install had zero to do with causing the crash. So I'm actually bringing this up to specifically say that it is a really bad idea, not that anyone has suggested it.


So as far as legality goes, the CA motor is the go. It will manage what you want, but you'll have to do some re-working of the rear end to enable a ute to hook up well off the line and run times like that. It isn't impossible, but you won't be doing it with a stock rear end (not so much in terms of strength which you might just get away with if you slip the clutch on launch rather than jump off it, but in terms of suspension geometry and adjustment). You'll need sticky tyres because of less than 'ideal' downforce on the rears, and they might end up being of a size that requires some tweaking to fit under there without rubbing.

I'd actually seriously suggest 'starting' the plan with the rear end upgrades - what parts and what setup will be needed and use that as the initial stage of development. In a sense, the motor in front of it won't make a huge difference as to what rear end type and spec to use, because whatever motor you go with will have to put out similar power to run that 11.

Posted on: 2011/2/4 3:35
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Re: Datsun 1200 Ute B122 - Building an 11sec ute?? Which way to go?
Not too shy to talk
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Thanks for the replies guys.

Im located in Fiji so i dont have to worry about getting the car engineered nor will i have problems with registration, etc.
Im gonna go for the SR.

I think i will get the trans tunnel from Maddat and start working on the body for now.

Thanks guys.

Have a good one.

Posted on: 2011/2/4 4:24
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Re: Datsun 1200 Ute B122 - Building an 11sec ute?? Which way to go?
No life (a.k.a. DattoMaster)
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rember you wont be-able to use original heater control unit if go maddat tunnel

Posted on: 2011/2/4 5:35

Edited by hotrocket on 2011/2/4 20:16:37
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Re: Datsun 1200 Ute B122 - Building an 11sec ute?? Which way to go?
Not too shy to talk
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No probs...dont really need the heater here but could do with a/c

Posted on: 2011/2/4 19:28
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