1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

1983 GSL - 20BPP Build

Old 01-20-19, 08:56 PM
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1983 GSL - 20BPP Build

Hello all,

I started this build 3 1/2 years ago, so I have a bunch of pictures and stories, but Its a short crank 3 rotor, built with new parts from Precision Engineering in New Zealand, they supply the E-Shaft, counterweights, centre plate (with bearing milled in), flywheel etc, the irons are s6 and the housings are new FD with 50mm Peripheral Ports installed. Rotors are FC high compression NA, and clearanced and then the whole rotating assembly was balanced to 0.

And because a picture says 100 words lets see if i can upload some





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Old 01-20-19, 09:13 PM
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Wow! Thatís my dream build.. looks awesome so far
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Old 01-21-19, 01:27 PM
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why was this not posted in the build section?
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Old 01-21-19, 02:08 PM
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Hi, Sorry I didn't look that far into it, happy if admin wants to move it.

I have more pictures, but there is a limit to posting on the threads. here are some more




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Old 01-21-19, 02:11 PM
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and more building the motor


this is the precision engineering centre plate that is supplied all machined up ready to go... im told these motors are good for 11,000rpm... not that i will every get to there.


slowly and carefully putting the sandwich together

one big hamburger ready to go
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Old 01-21-19, 02:33 PM
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And more





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Old 01-21-19, 02:40 PM
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Okay it seems I cannot upload anymore pictures... I will try again later.

I did write up a bunch of stuff under the pictures but lost that all somehow
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Old 01-22-19, 05:37 PM
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nice! what rear end are you going with?
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Old 01-22-19, 05:47 PM
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Awesome build! what trans are you going to run? Ecu? did you get a weight of the block of the short crank 20b?

I'm searching for a nice SA shell to put my 20B PP in right now. Glad to see someone else exploring this, I'll be looking for updates.

Matt

Last edited by highnitro12187; 01-22-19 at 05:51 PM.
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Old 01-22-19, 09:41 PM
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Originally Posted by Nelson Vining View Post
Okay it seems I cannot upload anymore pictures... I will try again later.

I did write up a bunch of stuff under the pictures but lost that all somehow
This site is terrible for uploading pictures isn't it

Can you give me an idea of what a short crank is?

Last edited by cpt_gloval; 01-22-19 at 10:48 PM.
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Old 01-23-19, 04:36 AM
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Badarse. You'll have to post up skid vids when its ready.
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Old 01-23-19, 02:33 PM
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Im running a 91 turbo trans, cut and shifted so the shifter comes up in the right spot, should handle 400hp okay
Rear end is stock LSD for run in purposes... I have a toyota hilux rear end with an ma70 supra clutch type LSD head, its a common swap for cars in Australia and New Zealand
ECU is a Microtech lt16 with Can bus set up so I can run my guages on a tablet
Weight of the motor alone i didnt weigh it, but the car weighs 1984.42 Lbps, or 900.12kg with the motor in and the interior out...

A short crank is an e-shaft designed specifically to use a normal 13b iron as the intermediary iron instead of the mazda factory thick iron... it was developed at a time before all these after market guys got into CNC and wot not when mazda werent producing the replacement thick irons. Also it makes the motor shorter by 20mm or so, so better to fit in a tight engine bay.... I have to say its a good fit in the engine bay of the 83

lets try uploading some more pictures
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Old 01-23-19, 02:36 PM
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Still wont let me upload
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Old 02-25-19, 04:19 PM
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Old 02-26-19, 02:36 PM
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Looking great! pretty awesome solution for the oil pan, I like the creativity.
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Old 02-27-19, 06:47 PM
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Man this is like the ultimate FB goal, keep chugging along with it!
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Old 03-01-19, 07:35 AM
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The want is too much. Dream build!! Keep at it.
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Old 03-17-19, 09:14 PM
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Old 03-17-19, 09:15 PM
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Old 03-17-19, 09:16 PM
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Old 03-18-19, 01:35 PM
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Old 03-18-19, 02:58 PM
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May not look like much, but it took 3 days...
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Old 03-18-19, 03:05 PM
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^I bet it did. Looks great!
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Old 03-18-19, 06:36 PM
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Old 03-18-19, 06:42 PM
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Once the extractors were done the rest of the exhaust went on in no time at all. these are specialty rotary stainless packed units so they will last longer than the stock fibreglass units

can see mt racingbeat suspension upgrades

2 v bands on a 3 inch thick wall mild steel pipe should in theory make it sound nice. But can always beef up the muffling in the mid section easily too
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