BP-BPT converson guide

**Posted:** Thu Jan 13, 2005 1:39 pm

For a simple BP-BPT conversion you will need the following minimum:

- Motor
For the standard conversion, I recommend buying a GTX or GTR Half cut from Japan. This will come with motor, ecu, wiring harness, intercooler and plumbing.
Any parts not used can be sold off.
Cost is generally around the £1000 mark

- Replacement Clutch
Recommend a single plate organic HD clutch for a basic conversion. Expect to pay around £150. Daiken is an excellent brand although there are others.

- Belts/Seals/Oils
You should always replace all belts, seals and lubricants in the motor.
Cost will be around £100/150 all up.

- Labour Charges
Any general mechanic can put do this conversion as it is as simple as remove and replace. Expect to pay anywhere upto £500 for this. You will also need someone to wire the motor in using the standard harness. Your mechanic may be able to do it, if not any auto electrician can do it for you. This will cost upto £200 generally.

This will provide you with a basic turbo conversion.

Total cost (excluding insurance) = 2K max. if you are lucky and know the right people or are doing the work yourself = £1150 or so.

Please be aware the above is based on a half cut. Engines can be bought separate if required. They are roughly 700 pounds (excluding ECU, wiring looms, intercooler and plumbing.)

There are 2 gearboxes commonly found in Astinas.

G25M-R
=====
Commonly found in DOHC BG Astina SP and 94/95 BA Astinas.

Used with
BP-ZE (MY92-94) & BP-DE (MY95)
Type
5MT, FWD
1st gear
3.307:1
2nd gear
1.833:1
3rd gear
1.310:1
4th gear
1.030:1
5th gear
0.795:1
Final drive
4.105:1
Reverse
3.166:1
Differential
open
Shift mechanism
remote, rod actuation

F25M-R
=====
Commonly found in 95+ BA Astinas (possibly other models)

Used with
B8-ME (MY92- 94) | Z5-DE | ZM-DE & ZL-DE | FP-DE & (MY96+) BP-DE | ZL-VE
Type
ALL 5MT, FWD

1st gear
3.416:1 | 3.416:1 | 3.416:1 | 3.416:1 | 3.416:1
2nd gear
1.842:1 | 1.842:1 | 1.842:1 | 1.842:1 | 1.842:1
3rd gear
1.290:1 | 1.290:1 | 1.290:1 | 1.290:1 | 1.290:1
4th gear
0.918:1 | 0.972:1 | 0.972:1 | 1.028:1 | 0.918:1
5th gear
0.731:1 | 0.775:1 | 0.775:1 | 0.775:1 | 0.731:1
Final drive
3.619:1 | 4.105:1 | 3.850:1 | 4.105:1 | 4.388:1
Reverse
3.214:1 | 3.214:1 | 3.214:1 | 3.214:1 | 3.214:1
Differential
All open

Differences
=======
- Larger Driveshafts in the G25M-R
- Larger Clutch plate in the G25M-R
- Smaller Casing on the F25M-R (less webbing so less strength)

Notes
====
The GTX flywheel will fit in a G25M-R box but not a F25M-R box

The above has been stolen from the astinaGT forum; please ask here if you have any problems or questions, they are a good bunch of guys.

http://www.astinagt.com/forum

And if you are interested in a turbo conversion I would advise you join this club. It has loads of BPT's and B6T's on there

http://www.fordlaser.com

If anyone has anymore info please feel free to add, or if you need any more info... please feel free to contact me.

Cheers guys

Ben

**Posted:** Sun Jan 16, 2005 6:40 pm

Is that your new engine Ben??

Whoevers it is, its spotless :wink:

Very handy piece of information, well researched :wink:

**Posted:** Sun Jan 16, 2005 6:50 pm

Hmmmmmm....... how much shall I put away every week?

**Posted:** Sun Jan 16, 2005 7:45 pm

Joe Mazda wrote:

Is that your new engine Ben??

No thats not mine, I wish!! it is nice and clean tho!

Im getting a half cut. full front of a GTX.

Ben

**Posted:** Sun Jan 16, 2005 8:07 pm

don`t you get a gearbox with a half cut???

**Posted:** Sun Jan 16, 2005 8:21 pm

you get everything including steering wheel and dash!!!lol

**Posted:** Tue Feb 01, 2005 2:15 pm

What type of engine is that one in the picture?

**Posted:** Tue Feb 01, 2005 2:22 pm

Its the 1.8 GTX (BPT) engine the same as a standard BP but with a turbo bolted on

**Posted:** Wed Feb 02, 2005 3:31 am

Quote:

the same as a standard BP but with a turbo bolted on

not at all the case. there are quite a few differences.
so please, nobody just bolt a turbo onto their n/a engine and expect it to run like a bpt

also, i definitely recommend a half cut, not just the engine.

plus u can sell the leftovers afterwards)

**Posted:** Wed Feb 02, 2005 8:28 pm

if u get a half-cut, isnt the gear box that comes with it a 4WD gearbox and therefore useless unless u wanna add a rear differential?

**Posted:** Fri Feb 04, 2005 12:14 pm

Yes both the GTX and GTR are 4wd.

**Posted:** Thu Feb 10, 2005 6:27 pm

Has anyone seen, used or heard of this company?

http://www.apiengines.com

Looks like they do Mazda lumps, but not sure if ther do the GTX, might be worth phoning them if you interested in a engine transplant.

regards
Ali

**Posted:** Fri Feb 11, 2005 4:30 am

What you really want is a BPD

.

**Posted:** Fri Feb 11, 2005 9:07 am

What's the BPD? :oops:

Mark

**Posted:** Fri Feb 11, 2005 10:18 am

its a turbo 1.8 lump, I think it has a bigger turbo than a GTR, not too sure tho, just what ive seen and read when stumbling around on the web.

**Posted:** Tue Jun 21, 2005 1:33 pm

Is there any way of puttin a turbo on the standard 1.8 glx (ba) engine?

**Posted:** Tue Jun 21, 2005 2:04 pm

Should be able to cobble on an MX-5 turbo or supercharger do a google search on Jackson racing supercharger kits) kit I'd have thought.

Mark

**Posted:** Wed Jun 22, 2005 12:15 pm

whats the difference between a GTX and a GTR?

**Posted:** Wed Jun 22, 2005 12:17 pm

sorry just seen, one has a high and mighty 210bhp...

**Posted:** Mon Jun 27, 2005 4:51 pm

yes they have different turbos, internals, the GTR is a slightly better engine, tho when it breaks it costs more to fix. you can get 280-300 BHP from the GTX, so its best to buy a GTX and spend the extra you save on new bits for it

**Posted:** Fri Jul 08, 2005 1:04 am

yo ben any chance of knowing wot turbo the gtr uses?

**Posted:** Fri Jul 08, 2005 8:31 am

jh1806 wrote:

whats the difference between a GTX and a GTR?

The price :P also what shaggy said above. Here is a pic of a GTX and GTR headers+turbo side by side

**Posted:** Fri Jul 08, 2005 9:32 am

Lantis wrote:

yo ben any chance of knowing wot turbo the gtr uses?

What do you need to know fella? the part number?

**Posted:** Fri Jul 08, 2005 12:51 pm

from that picture, the GTR header+turbo looks the better part! looks like the turbo is bigger too, or is that an illusion?

**Posted:** Fri Jul 08, 2005 2:33 pm

yeh the GTX is 190 where as the GTR is 210 i believe. sumthing like that anyway. though yes, the GTR is slightly more powerful.

Arty

**Posted:** Sat Jul 09, 2005 12:49 pm

Have a look here:

http://www.mazda323performance.com/foru ... php?t=6188

Ben

**Posted:** Sat Jul 09, 2005 10:57 pm

Nice one Shaggy

**Posted:** Mon Aug 01, 2005 7:56 pm

Some info on importing, very good info.

http://customs.hmrc.gov.uk/channelsPort ... ROD_008051

**Posted:** Fri May 19, 2006 1:53 pm

Mark.T wrote:

What's the BPD? :oops:

Mark

after extensive research on google i have found that it is Borderline Personality Disorder

The BPD is commonly known as the 'big turbo' variant as it utilised a much larger IHI RHF6CB turbocharger. The BPT was used as the basis for the engine, with changes such as sodium filled exhaust valves, larger (and front mounted) intercooler, bigger fuel injectors and stronger engine internals helping to up the performance of the engine to produce 206 hp (154 kW) and 184 ft·lbf (250 N·m). This engine was designed to power Mazda to a world rally championship win, and was thus used in the limited production Mazda Familia GT-R (2200 built) and GTAe (300 built).

Applications:

1989-1994 Mazda Familia GT-X (Japan)
1992-1993 (BPD) Mazda Familia GT-R / GTAe (Japan)
1989-1994 Ford Laser TX3 turbo (Australia)
Ford Laser GT-X

**Posted:** Mon May 22, 2006 1:40 pm

Extensive search ???
Theres a sticky about the GTR/BPD differences.
Better than anything you will find elsewhere on the net.

BP-BPT converson guide

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