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Author Topic: Pulled motor to do rings and head gasket, and got super carried away! new pics!  (Read 2939 times)

EShepherd

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    • 1991 Capri XR2, 1991 Capri XR2 Rusted out Shell

Hey if you want, my transmission is literally sitting on the floor in front of my toolbox. Space is at a premium right now, but if you give me a couple days I can get a bunch of pictures of it for you to compare to. I'm fairy positive that in the USA, the Capri was only ever sold with a Mercury badge. The fact that you have no XR2 markings on the car might mean that it was a base model, but then again yours has a turbo. What was on there before you put the big boy on? If it was the IHI turbo, I'm pretty sure that's the factory one that came on the XR2's. Is it possible the previous owner had done a turbo swap on a base model Capri?

If you need me to open up the gearbox and count teeth on the 5th gear, let me know. Somewhere in that post you linked, I think I saw tooth counts. The only way you'll know for sure what you have is to open it up and look, I think.

Edit:
Holy crap! Does that page say that gear swap will give this thing a 165mph top speed?
Really?
« Last Edit: March 09, 2021, 04:28:09 PM by EShepherd »
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Rocketman

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    • 91 BPT AWD Capri & 1991 XR2
    • http://www.werbatfik.com

In the USA the XR2 was the turbo-only model. Australia got an XR2 but it was a trim package that did not specifically mean turbo.
We did not get them in 89, the USA was delayed by a year or two because Ford had to add airbags to meet US safety rules.

The 89/90 base model Capri in Australia had a SOHC engine & drum rear brakes too I think, we never got that here.

Regardless Ford/Mazda did not mate the B6T engine to anything other than a G series as far as im aware. Keep in mind those speeds are MPH not KPH
The gear ratios should be the same.

Watching your videos, the clutch does appear to be slipping a fair bit, and your AFRs are peaking into dangerously lean territory, you are hitting 13's man. Turn the boost doooown

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1.8L Turbo All Wheel Drive Capri... the "GTXR2"


Aus Capri

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    • 1989 Capri Turbo

Yea it's getting into the 13s at real high rpm, I'll turn the boost down a bit more.  I already turned it down 10psi!! hahah I'm missing my 5th injector  :'(  for the few seconds the clutch holds on at 30 psi it feels absolutely insane.!

Hey rocketman I was thinking about wet nitrous systems that use a fogger nozzle. Would they be a no go for our motors too because of the uneven fuel distribution through the manifold?  I guess to do it without issue you would need 4 fogger nozzles in each runner of the intake.
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Aus Capri

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    • 1989 Capri Turbo

My car is definitely a 89 factroy turbo, I'm pretty sure its the same as the US xr2 but with no airbags and rhd. I guess the clutch is causing the low speeds. In 3rd gear I'm bearly tuuching 130 and from the info about the gears it should be doing about 150.

I'm looking at act, clutchmasters and spec, for a decent clutch for it. Ant advice on what clutch is going to do the best job?
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Rocketman

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    • 91 BPT AWD Capri & 1991 XR2
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I have used 2 ACT clutches, one in the GTXR2 with the bigger 1.8 + turbo and one in a mostly stock XR2. The model is Z62-HDSS
Heavy Duty pressure plate + full face "super street" sprung disk. Heavy pedal but driveable in normal traffic if a bit touchy (I had both mine on Fidanza billet flywheels) and supposed to hold 400hp.
Spendy but you won't go wrong with it

I also had some eBay brand clutch way back in the day that was supposed to be a performance clutch, maybe I posted it here years ago but I don't recall the brand, it was maybe a bit tougher than a stock clutch. Doubt the brand is still around

I'd recommend staying away from multi-puck clutches and unsprung disks, I have driven Capris with them and they are basically on/off, there's no slipping for driveability. Not worth it IMO

For the amount you'd spend on nitrous you could get a standalone setup and have real turbo power on tap at all times. haha
Yes I'd thought about 4x fogger nozzles but at least when I looked the minimum shot size was 25hp/nozzle, and that's a 100hp shot. Add that with the intercooling effect of nitrous + boost and you're in for a wild ride I suspect

There are different intake manifolds out there that can be modified for fwd use, that might be better for fuel/nitrous distribution but there's a far better solution to your AFR problem
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1.8L Turbo All Wheel Drive Capri... the "GTXR2"


Aus Capri

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    • 1989 Capri Turbo

I was just wondering about the nitrous distribution, prob not gonna do it at the moment anyway. I wasn't thinking about the afr ratios more about reducing lag. Maybe a small shot around 3000 rpm to 4500rpm and then let the turbo do its thing from there out and cut the nitrous. Could probably set it up with 2 pressure switches one to trigger it as boost starts and one to turn it off at say 18psi.
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Rocketman

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That turbo is pretty big for a 1.6L
A "smaller" turbo would reduce spool time and still be very likely to hit your power goals

Modern turbos are amazingly efficient for their size, too
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1.8L Turbo All Wheel Drive Capri... the "GTXR2"


Aus Capri

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    • 1989 Capri Turbo

I know I should have gone smaller, a gt2871 or 2876 would have been enough and much better suited to the motor, I was just worried I would still want more and the gt3076r gives me heaps of head room. I can't wait to get a stand alone ecu, I don't know how to wire it in but there is a guy here in Sydney that will alter my wiring harness and supply a microtech and bpt distributor for 700AUD around 550US Roughly. Im just broke as a joke at the moment and have regos to pay before I can think about getting it. Clutch isn't cheap either and they want about 100 to post it from 🇺🇸. It's driving me nuts not having cash to do it. Considering selling my van to fund this thing
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Aus Capri

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    • 1989 Capri Turbo

I was thinking about getting this, says its good for 500ft/lb
The Act clutch you mentioned says good for 379ft/lb

I really don't care bout drivability I want to send it to the moon and I will be so disappointed if it still slips.
I want it to run at least 30psi maybe 35 if itl get up there. 400-450hp, I might get the tough gears for 3rd and 4th plus the box brace plate thing. Or a shed load of spare gear boxes and just classify them as a consumable.

Any idea with the clutch in the link below if it needs any special flywheel or can it work with the stock one with a resurfaced face.

Thanks for all your help man sorry to bug you

https://www.ebay.com.au/itm/Spec-for-93-97-Ford-Probe-GT-2-5L-Stage-5-Clutch-Kit-specSZ155-/113541968418?_trksid=p2349624.m46890.l49292
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Rocketman

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    • 91 BPT AWD Capri & 1991 XR2
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That's literally the exact opposite of what I would recommend, lol
Keep in mind the sprung disk will also act as a buffer against shock loads to the transmission. Which I would think is beneficial to the transmission

4-450hp from what I have seen you will be needing a new  G series gearbox after every pull. Between the gears and the differential it's just not made for anything near that kind of power. Maybe I'm wrong. I've had one blow up on me merely pulling out of a parking lot - it had been abused by a previous owner doing burnouts.

Most of the Mazda guys running that kind of power had long switched to a Toyota transmission via an adapter plate.
Have a looksee here to see what some guys are doing for their builds: https://www.facebook.com/groups/803110999707450/

You get into the big power levels it's pay to play, haha. $$$$
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1.8L Turbo All Wheel Drive Capri... the "GTXR2"


Aus Capri

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    • 1989 Capri Turbo

I've been watching a guy on youtube called stovall's Garage he did the Toyota swap in his escort, and I was thinking that would be the way to go but reading on here about it it sounds very hard to achieve in our bf chassis. 

🤔 it seems I'm stuck between a rock and a blown gearbox
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Aus Capri

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    • 1989 Capri Turbo

I never did the Facebook thing, I can't see that page sorry man
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Rocketman

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    • 91 BPT AWD Capri & 1991 XR2
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It's been done in the BF chassis before, the axles are the complicated bit as the combo they use on the Escort won't work in the BF

I don't blame you for not using facebook but that page is a literal goldmine for box conversions specifically for BF and BG mazdas, fwd and awd. Not just toyota boxes either, there are a fair number of mitsubishi evo boxes used as well
You could check out the forums on www.clubprotege.com there is a metric ton of gold info there from back in the day. I used to spend a lot of time there.
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1.8L Turbo All Wheel Drive Capri... the "GTXR2"


EShepherd

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    • 1991 Capri XR2, 1991 Capri XR2 Rusted out Shell

Yeah I just signed up for club protege after trying to see one of the links someone posted on here about the 5th gear swaps. There's a ton of awesome ideas floating around on there if you look for them. Also, have you looked into an anti-lag setup for that giant turbo? You'll definitely need to figure out your tune so you aren't leaning out so much, but that could help you keep the thing in boost a bit. I don't know if anyone's ever needed one on a Capri before, but I can't imagine it'd be too hard to figure out.

I kind of think a smaller turbo might be the best option. At least until you can figure out a trans swap. If he's saying they won't handle that much power, I'd believe him. Transmissions get expensive quick.
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Aus Capri

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    • 1989 Capri Turbo

Anti lag would definitely help, I'll look into it in the future!
I know the g series dosent hold that much power but I imagine when I blow it they would be pretty cheap and plentiful. I'm gonna sign up to the protege site and check it out too, I'm keen to fo the Toyota swap.  I have heard it will hold 800hp!

I really want to make big horsepower, my poser mate in his $100,000 audi rs3 has been talking some shit about our cars and that's one of the things that inspired me to build it and go for the moon, I wanna race him 100kph to 200kph and wipe that smug smile off his face. Maybe I'll paint it pink first too to really upset him. 😂
« Last Edit: March 11, 2021, 09:46:12 PM by Aus Capri »
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