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Author Topic: Beta Coupe GCRE upgrade  (Read 888 times)
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rossocorsa
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« Reply #20 on: May 05, 2019, 10:57:34 AM »

  Guy's SPO - the cranks from 2 litre models MUST NOT be reground; if they're damaged, they're scrap!

That's a bit black and white. I think Guy acknowledges that the cranks can sometimes be saved but that it's not always worth it and for his engines he doesn't do it. The difficulty is the surface hardening on the OE crank and the possibility of micro cracking during re-hardening. To rescue mine (after I'd spend several hundred with guy doing all the ops you outline) I had it partially ground, re-hardened, crack tested and then re-ground to 2nd undersize. The depth of hardening is more than is removed in the final grind so you are left with a hard journal surface. The only problem I had was forgetting to take the woodruff key out of the crank  - it ended up with a ceramic like hardness and took ages to remove.

I ran that crank in my 150bhp engine for 4000 miles with no problems. Note I'm not saying that this process will work for anyone else. The crank may well fail crack testing. I thought it was worth a punt and got away with it.

GC works on the basis of ultimate safety and minimum risk so will always go for the very best option, something that might work which is a calculated risk isn't really in his vocabulary as he has to stand by his work. It does mean he is only really an option for those with relatively bottomless pockets though. As regards cranks good 2 litre ones can still be found but are getting rarer so don't ever throw out a 2 litre beta bottom end!
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Neil-yaj396
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1979 1300 Coupe 1983 2000ie Coupe


« Reply #21 on: May 05, 2019, 11:12:44 AM »

Hi guys,

Great work Chris looking forward to some more updates!

One thing I want to ask... I haven't ever heard of oil starvation before at least not on the coupes.
I am about to start my engine rebuild and would love to make a similar modification to my pan to hopefully rectify that issue for the future.
Stuart or Chris, can you talk me through what I need to do?
Any documentation would be awesome also.

I would really appreciate it!
Cheers George


It depends how fast you drive but the standard sump is rather compromised. This is due to the transverse layout it makes a good internal layout awkward for mass production. Essentially the cure is to cut out the original baffle and fit a more sophisticated option. GC will of course do a perfect job but not everyone can afford his prices, there is the BB kit or if you can find the pattern and are good at metal work you could probably make one yourself

Both of my 1300 Coupes have been fast enough to induce surge. Keeping the oil fully topped up does help though.
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betabuoy
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« Reply #22 on: May 05, 2019, 06:37:15 PM »

Hi guys,

Great work Chris looking forward to some more updates!

One thing I want to ask... I haven't ever heard of oil starvation before at least not on the coupes.
I am about to start my engine rebuild and would love to make a similar modification to my pan to hopefully rectify that issue for the future.
Stuart or Chris, can you talk me through what I need to do?
Any documentation would be awesome also.

I would really appreciate it!
Cheers George

Hi George

Iíve thrashed Betas for years and love them to bits but the engineís Achilles heal has always been the oil system.  Itís a good tip from Neil to keep them topped up but if you plan drive yours hard, you would benefit from improving the sump as a minimum - and thatís easy if the engineís out.  My engine is already quite expensive so Iíll not compromise on lubrication; for me, a baffled sump is part of a system that will include a cooler and accumulator.  I donít want a dry bearing on a fast corner at a track day!

Plenty more pictures to come over the next few weeks.

Chris
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1983 Beta Coupe S2
1967 Morris Minor Traveller
2003 Golf GT TDI
2007 Panda
betabuoy
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« Reply #23 on: May 10, 2019, 09:47:12 AM »

Carbs have arrived! 

Seen here being fitted to the GC Beta manifold.  This is specifically cast offset and at angle; designed to clear the block mounted distributor and account for the Beta engine mounting angle.


* DSCN7476.JPG (928.02 KB, 2592x1944 - viewed 41 times.)
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1983 Beta Coupe S2
1967 Morris Minor Traveller
2003 Golf GT TDI
2007 Panda
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