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Author Topic: BP Swap  (Read 17713 times)

greywolf27030

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Re: BP Swap
« Reply #30 on: July 22, 2016, 10:08:18 AM »

So, I take it you can use the b6 na ecu with an na bp?

Yes you can by swaping over the B6’s distributor, injectors, sensors, ect …to the BP.

Does this cause any loss of performance?

Jack

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chrispoe

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    • 91 BP Capri GT
Re: BP Swap
« Reply #31 on: July 22, 2016, 10:36:35 AM »

The stock Capri ecu/wiring doesn’t support VICS intake manifolds,  so you’ll lose some power in the low end or the top end depending on which way position the valves. 
The only other thing would be that the ignition timing is proactively controlled by the ecu with the BG setup vs. the Capri’s reactive distribitor controlled setup.
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WashiestSnake

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Re: BP Swap
« Reply #32 on: July 22, 2016, 08:16:35 PM »

If anyone is wondering how difficult this swap is, I did it successfully with no experience, with hand tools, while really drunk. The car is a mess.

A fast mess.
Id love to see pictures/write up on how to do it. I don't have much experience working on cars, but the idea of the swap is really daunting.
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1991 Mercury Capri 68,xxx Miles--Project(AWD)
1996 Lincoln Continental -- The Boat(Given to my Brother)

Crapi Attitude

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    • '91 BP Capri, '12 Versa 6MT, Bad Dragon
Re: BP Swap
« Reply #33 on: July 23, 2016, 07:30:59 AM »

I used a 1994 Escort GT engine. You need to swap the engine mount and accessories from the Capri engine to the Escort engine. The timing belt has to come off for this. Swap all the electrical parts from the Capri to the Escort engine, including injectors, but use the Escort fuel rail. Use the throttle body from an automatic Escort GT (four wire. The plug is different but the signals are the same as the Capri unit). You probably want to swap the clutch slave cylinder for one from an Escort or Protege, as the Capri one won't clear the engine face plate. I used the Capri slave mounted at a cockeyed angle because I'm cheap and lazy. I used an engine set up for an automatic car, so the oil pan included a sealing surface/face plate for the torque converter. This won't clear the subframe. Either find the correct oil pan or whittle it down with a Sawzall (See 'cheap and lazy' above). Drink enough liquor to make this seem like a good idea, go.

Thats about it. The Capri ECU runs it fine. The throttle tip-in was way more aggressive that I expected; I crashed into the trash cans the first time I drove it.
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azgtx

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Re: BP Swap
« Reply #34 on: July 23, 2016, 07:56:10 PM »

Also, to lose the VICS on the BP you can use the BG GTX intake manifold which does not use it.
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Crapi Attitude

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Re: BP Swap
« Reply #35 on: July 23, 2016, 10:03:47 PM »

Just leave the VICS. Its fine. I'm going to wire mine to a switch.
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Crapi Attitude

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Re: BP Swap
« Reply #36 on: July 24, 2016, 07:34:30 PM »

Say, does anyone know how fast you can safely spin a BP? There seems to be no mechanism to limit engine speed on my setup.
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chrispoe

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    • 91 BP Capri GT
Re: BP Swap
« Reply #37 on: July 24, 2016, 09:44:05 PM »

I used a 1994 Escort GT engine. You need to swap the engine mount and accessories from the Capri engine to the Escort engine. The timing belt has to come off for this. Swap all the electrical parts from the Capri to the Escort engine, including injectors, but use the Escort fuel rail. Use the throttle body from an automatic Escort GT (four wire. The plug is different but the signals are the same as the Capri unit). You probably want to swap the clutch slave cylinder for one from an Escort or Protege, as the Capri one won't clear the engine face plate. I used the Capri slave mounted at a cockeyed angle because I'm cheap and lazy. I used an engine set up for an automatic car, so the oil pan included a sealing surface/face plate for the torque converter. This won't clear the subframe. Either find the correct oil pan or whittle it down with a Sawzall (See 'cheap and lazy' above). Drink enough liquor to make this seem like a good idea, go.

Thats about it. The Capri ECU runs it fine. The throttle tip-in was way more aggressive that I expected; I crashed into the trash cans the first time I drove it.
I used a 92 escort engine that had a MTX, the oil pan flange with additional mounting holes extended beyond the tranny, but I didn't have any clearance issues with the crossmember. As for the clutch, I just cut a small 1 inch piece off the oil pan flange with a jigsaw to make room for the clutch slave cylinder.
Also, did you do any clearancing of the engine bay sidewall for the alternator puley? cuz I didn't do it with my swap.


Just leave the VICS. Its fine. I'm going to wire mine to a switch.
IMHO…The GTX manifold would be a downgrade for N/A use. I would leave the VICS in and use a rpm switch to activate it. Here’s one for $45.
https://www.summitracing.com/parts/sum-830449-1?seid=srese1&cm_mmc=pla-google-_-shopping-_-srese1-_-summit-racing&gclid=Cj0KEQjwztG8BRCJgseTvZLctr8BEiQAA_kBD166Tbeef-CXSZcdnhIbWZbfveBxtYo1NdNKXgKcPMMaAlXg8P8HAQ



Say, does anyone know how fast you can safely spin a BP? There seems to be no mechanism to limit engine speed on my setup.
I run my BP over 7000 rpm all the time and I haven’t had any problems yet.

« Last Edit: July 24, 2016, 09:56:20 PM by chrispoe »
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Crapi Attitude

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Re: BP Swap
« Reply #38 on: July 25, 2016, 05:20:51 AM »

Quote
Also, did you do any clearancing of the engine bay sidewall for the alternator puley? cuz I didn't do it with my swap.

I didn't. Its tight, but it fits. I did put a smaller (correct) diameter pulley on. Bosch alt, if that matters.

Your RPM switch is intriguing. Any idea if it can switch the solenoid directly, or should I use a relay?
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chrispoe

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Re: BP Swap
« Reply #39 on: July 25, 2016, 09:03:19 AM »

The switch I linked to can handle 3 amps and it’s more than powerful enough to energize a solenoid directly.

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WashiestSnake

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Re: BP Swap
« Reply #40 on: July 25, 2016, 09:30:00 AM »

I used a 1994 Escort GT engine. You need to swap the engine mount and accessories from the Capri engine to the Escort engine. The timing belt has to come off for this. Swap all the electrical parts from the Capri to the Escort engine, including injectors, but use the Escort fuel rail. Use the throttle body from an automatic Escort GT (four wire. The plug is different but the signals are the same as the Capri unit). You probably want to swap the clutch slave cylinder for one from an Escort or Protege, as the Capri one won't clear the engine face plate. I used the Capri slave mounted at a cockeyed angle because I'm cheap and lazy. I used an engine set up for an automatic car, so the oil pan included a sealing surface/face plate for the torque converter. This won't clear the subframe. Either find the correct oil pan or whittle it down with a Sawzall (See 'cheap and lazy' above). Drink enough liquor to make this seem like a good idea, go.

Thats about it. The Capri ECU runs it fine. The throttle tip-in was way more aggressive that I expected; I crashed into the trash cans the first time I drove it.
I used a 92 escort engine that had a MTX, the oil pan flange with additional mounting holes extended beyond the tranny, but I didn't have any clearance issues with the crossmember. As for the clutch, I just cut a small 1 inch piece off the oil pan flange with a jigsaw to make room for the clutch slave cylinder.
Also, did you do any clearancing of the engine bay sidewall for the alternator puley? cuz I didn't do it with my swap.


Just leave the VICS. Its fine. I'm going to wire mine to a switch.
IMHO…The GTX manifold would be a downgrade for N/A use. I would leave the VICS in and use a rpm switch to activate it. Here’s one for $45.
https://www.summitracing.com/parts/sum-830449-1?seid=srese1&cm_mmc=pla-google-_-shopping-_-srese1-_-summit-racing&gclid=Cj0KEQjwztG8BRCJgseTvZLctr8BEiQAA_kBD166Tbeef-CXSZcdnhIbWZbfveBxtYo1NdNKXgKcPMMaAlXg8P8HAQ



Say, does anyone know how fast you can safely spin a BP? There seems to be no mechanism to limit engine speed on my setup.
I run my BP over 7000 rpm all the time and I haven’t had any problems yet.
Couldn't a switch like that be used on a BP4W to activate the VVT?
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1991 Mercury Capri 68,xxx Miles--Project(AWD)
1996 Lincoln Continental -- The Boat(Given to my Brother)

chrispoe

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Re: BP Swap
« Reply #41 on: July 25, 2016, 10:03:47 AM »

Couldn't a switch like that be used on a BP4W to activate the VVT?

No, the RPM switch is just an on/off signal to control a vacuum solenoid.

Controlling VVT on a BP4W is far more complicated than just an on/off signal. The ECU takes things like engine RPM, load, temperature, cam , and crank positions to determine what the optimal cam timing should be and then sends a constantly varying signal to a variable oil pressure valve that changes the cam timing via a hydraulically actuated rotor.
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WashiestSnake

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Re: BP Swap
« Reply #42 on: August 14, 2016, 12:42:03 AM »

Hey Chris what year/s Escort GTs am I looking for? Im gonna go down to the junkyard here soon, and I want to start grabbing some stuff. I might pick up a engine If i can get it for a good price.
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1991 Mercury Capri 68,xxx Miles--Project(AWD)
1996 Lincoln Continental -- The Boat(Given to my Brother)

chrispoe

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    • 91 BP Capri GT
Re: BP Swap
« Reply #43 on: August 15, 2016, 09:39:48 AM »

Here’s a small snippet from my “work in progess” N/A swap guide


Next pick your engine. I recommend going to a junkyard and finding a 91-96 Ford Escort Gt or a 91-94 Mazda Protégé LX donor car. All of the parts you’ll need for doing a N/A swap should be there.

Note #1: the protégé has barbs on the ends of its fuel rails for connecting the fuel lines ( similar to our Capri). The escort has quick disconnects on its fuel rail. You can use the escort’s fuel rail still if you grab the quick disconnect connectors that go onto the fuel rail (they still do have barbs on the ends of them)
Note #2: MTX and ATX equipped BPs have different throttle position sensors. The MTX TPS has three wires and is just a pair of switches that tell the ecu if the throttle plate is fully closed or open. The ATX TPS has four wires and contains a idle switch and a potentiometer similar to the Capri.


What you’ll need from the donor:
The BP engine
Exhaust manifold and down pipe
Intake manifold with fuel rail, throttle body assy w/IAC and an ATX TPS
intake plenum tube and engine wire harness
« Last Edit: August 15, 2016, 09:41:20 AM by chrispoe »
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WashiestSnake

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Re: BP Swap
« Reply #44 on: August 15, 2016, 04:53:03 PM »

Thanks!
 While im out there should I grab the Escort G-series or will my F-series hold up to the torque?
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1991 Mercury Capri 68,xxx Miles--Project(AWD)
1996 Lincoln Continental -- The Boat(Given to my Brother)
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