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 Post subject: Bob's SR20DET build
PostPosted: Tue Jun 10, 2014 8:56 am 
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Joined: Wed Jun 06, 2012 8:17 am
Posts: 66
Location: Montreal, Quebec
It's starting. I have the SR20DET engine, ECU and tranny. I also just aquired a 1990 5L mustang diff and spindles.

Looking forward to the build. I am getting the 1"square tubes. I am using .125 wall thickness as it is easily accessible and very cheap.

Any downfalls other than it might be a bit on the heavy side?

From my other thread, thanks for the info on choosing frame width. Looking up the 1990 mustang tracking.

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 Post subject: Re: Bob's SR20DET build
PostPosted: Tue Jun 10, 2014 8:58 am 
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Joined: Wed Jun 06, 2012 8:17 am
Posts: 66
Location: Montreal, Quebec
Things to do in the upcoming weeks:

Determine the max width I can make the chassis with the mustang diff.
Start working on front end geometry with the mustang spindles.

Looking at replacing the drums with disc's. This is a 500.00 job. Is it worth it I am wondering. I don't think it will make a difference in braking, just the weight factor.


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 Post subject: Re: Bob's SR20DET build
PostPosted: Tue Jun 10, 2014 11:46 am 
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Joined: Fri Jan 02, 2009 1:45 pm
Posts: 909
Location: Halifax, Nova Scotia
Look at RacerAl's build. He recently converted rear drums to discs and the weight was nearly a wash. If you are going to do a drum to disc conversion it only seems justified if it's performance you are after.

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 Post subject: Re: Bob's SR20DET build
PostPosted: Tue Jun 10, 2014 11:58 am 
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Joined: Tue Jul 04, 2006 5:40 pm
Posts: 1392
Location: Novato, CA
Not worth it, IMO. Brakes are definitely not the weak point on these cars, and I don't think disc brakes will save you much weight, if any.


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 Post subject: Re: Bob's SR20DET build
PostPosted: Wed Jun 11, 2014 8:27 am 
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Joined: Wed Jun 06, 2012 8:17 am
Posts: 66
Location: Montreal, Quebec
Warren Nethercote wrote:
Look at RacerAl's build. He recently converted rear drums to discs and the weight was nearly a wash. If you are going to do a drum to disc conversion it only seems justified if it's performance you are after.

nick47 wrote:
Not worth it, IMO. Brakes are definitely not the weak point on these cars, and I don't think disc brakes will save you much weight, if any.


Ok then, I will leave it. I wont need extra braking power and the weight difference is minimal, so I will leave it and on to the next step.

It's getting really exciting now.... Picking up wheels off the mustang today or tomorrow and the steering rack.metal for the chassis should get real soon and start the chassis.


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 Post subject: Re: Bob's SR20DET build
PostPosted: Fri Jun 13, 2014 11:59 am 
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Joined: Sun Jul 22, 2012 11:30 pm
Posts: 209
Good luck with your build. All the kool kids have SR20DET powered Locost's :mrgreen:

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 Post subject: Re: Bob's SR20DET build
PostPosted: Fri Jun 13, 2014 2:55 pm 
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Joined: Wed Jun 06, 2012 8:17 am
Posts: 66
Location: Montreal, Quebec
7Degrees wrote:
Good luck with your build. All the kool kids have SR20DET powered Locost's :mrgreen:


yeah, my wife says I am a 53 year old kid.


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 Post subject: Re: Bob's SR20DET build
PostPosted: Fri Jun 13, 2014 3:52 pm 
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Joined: Fri Jun 13, 2014 11:55 am
Posts: 12
I went for 1.5" Square 14 Ga (2.4 mm or something 0.100" aprox) and is pretty thick.
Although easier to weld.
I reckon 0.120 (3.2 mm) would be a little bit too much.
But that´s just me.


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 Post subject: Re: Bob's SR20DET build
PostPosted: Fri Jun 13, 2014 5:41 pm 
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Joined: Thu Jan 10, 2008 4:47 pm
Posts: 5682
Location: Massachusetts
Go with disks if you can. I think the difference is in how the brakes feel and how they produce brake force compared to pedal effort. The disks are more linear and a if things are setup right less prone to lockup.

On the other hand this is a performance issue that you may never get to. Maybe you can bring the price down somehow..

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 Post subject: Re: Bob's SR20DET build
PostPosted: Fri Jun 13, 2014 9:25 pm 
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Joined: Sun Jun 24, 2007 6:04 pm
Posts: 1323
Location: BC
Since I was mentioned earlier I will pipe in, yes the weight difference between drums and discs was a wash, almost the same weight.
But the hugely improved adjustment setup I have using the rear proportioning valve as well as my Wilwood pedal setup is way better than I could ever got with my drum brakes.
That alone has made it a worthwhile swap for me, the new disc braking system is way easier to setup and much more controllable during everyday and hard braking.
One of my better decisions.


Al

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 Post subject: Re: Bob's SR20DET build
PostPosted: Sat Jun 21, 2014 7:11 pm 
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Joined: Mon Jun 04, 2007 5:49 pm
Posts: 22
Location: morin heights north of montreal qc
Hi Bob went to pick a part and there was a mustang with disk brake diff the guy said 125 complete


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 Post subject: Re: Bob's SR20DET build
PostPosted: Sun Jun 22, 2014 10:05 pm 
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Joined: Wed Jun 06, 2012 8:17 am
Posts: 66
Location: Montreal, Quebec
califkid_66 wrote:
Hi Bob went to pick a part and there was a mustang with disk brake diff the guy said 125 complete


Ils it in Morin heights? What year mustang? What year is it?

Tanks for thinking about me...he he

Howard thé mr2 coming along?


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 Post subject: Re: Bob's SR20DET build
PostPosted: Sun Jun 22, 2014 10:06 pm 
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Joined: Wed Jun 06, 2012 8:17 am
Posts: 66
Location: Montreal, Quebec
califkid_66 wrote:
Hi Bob went to pick a part and there was a mustang with disk brake diff the guy said 125 complete


Ils it in Morin heights? What year mustang? What year is it?

Tanks for thinking about me...he he

Howard thé mr2 coming along?


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 Post subject: Re: Bob's SR20DET build
PostPosted: Mon Jun 23, 2014 10:21 am 
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Joined: Mon Jun 04, 2007 5:49 pm
Posts: 22
Location: morin heights north of montreal qc
Its close to you les puces on st—jean batiste in pointe aux tremble
And my project windshield and wipers left to fab
Send me your New location by pm ill go visit


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 Post subject: Re: Bob's SR20DET build
PostPosted: Thu Jun 26, 2014 12:05 pm 
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Joined: Sat Aug 11, 2012 4:44 pm
Posts: 372
Location: Charlotte, NC
Woohoo another sr20 build. Let me know if you have any questions on that engine. Been a nissan guy for quite some time.

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26 years old, Shifter Kart racer and mechanic. Owner of 8EightFabrication (check me out on Instagram @kartingginger or #88Fab). Looking at building a Car9 locost powered by and R1 with miata and suby bits. Daily Drive a '14 Focus Hatch
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