biturbo228
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Looks like it's made for that space! Excellent work.
Thinking about it, if the suspension turrets need sme bracing without the engine there to do it you could very easily run a brace in front of the engine attaching to the standard engine mount holes.
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Looks like it's made for that space! Excellent work. Thinking about it, if the suspension turrets need sme bracing without the engine there to do it you could very easily run a brace in front of the engine attaching to the standard engine mount holes. I’m hoping to do exactly this. It was mentioned somewhere else on this thread and in all honesty I’d over looked that the original engine is infact a brace. I’m possibly going to use a brace and mount the radiator off it too.
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biturbo228
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Good plan. Oh, another neat thing if you're happy for the scope to steadily creep. this chap's thread over on sideways mentions extending out the coilovers mount on the turrets and fitting smaller diameter (and much more readily available) 2.25" springs, which helps reduce the spring rate loss as the suspension compresses. One of those 'will definitely handle fine without it, but would be nice' modifications.
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Feb 18, 2021 23:42:42 GMT
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It’s been a while since I’ve had time to work on the gt6. A change in jobs but a bit of a stop to it while I was settling in. I’m still doing heavy haulage but with less nights away so maybe more garage time. Anyway tonight a grabbed a few hours and cut back some of the offending chassis lips that were stopping the gearbox from sitting low enough. Even managed to weld them back up and almost got them ground down before it was to late to make noise. I took drastic action with the bulkhead too. The were a lot of pin holes caused by rust and was really close the the engine in places so I’ve chopped it all back to good metal. Once the engine is in il be able to fabricate the bulkhead and gearbox cover to suit. Engine mount bushes turned up to so maybe at the weekend I might get to sit it in and mock up the mounts.
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biturbo228
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Feb 18, 2021 23:50:52 GMT
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Looking good! Hopefully that's enough to clear everything. If so then that would be significantly easier than the chopping I had to do to get the saloon box in (abeit 3" further back).
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Feb 25, 2021 22:39:24 GMT
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So it’s Thursday night so that means a quick get away from work and a night to play in the garage. Had a bit of a tidy up as I was getting buried in tools/ rust/ discarded Saab parts. Then tidied up the chassis after removing the lips. Gave them a quick blast of primer to stop any surface rust and makes it a bit easier to see if there’s anymore clearance problems. Relieved a little behind the suspension turret to so the fittings on the oil filter take off won’t catch if the engine shifts about as it’s tight. Which nicely leads on to the next job. Engine mounts. I bought two block mounting plates as for £20 it wasn’t worth messing about. And they fit a treat. The block needed tapping out (holes are there but really corroded) so had to treat myself to a new tap and die set. This has thrown up a slight issue. The turbo sits directly over the passenger side plate leaving no room for a mount. So the exhaust manifold is going to be made from scratch. It was going to get done much later when the car was on the road but will have to be done sooner. Just another custom part to make. Euro car parts keep having weekend sales at the moment and a set of poly bush lancer evo 4 bottom arm bushes came up at £20. Looked like they might do for engine mount bushes so took a gamble. And they seem to be spot on. Grabbed some tube slightly over size and sliced it down the middle and removed 3mm and welded back up. Now they are a snug fit. The plan is on Saturday lift the engine in and fingers crossed get the mounts made up and welded in. I’ve been and took measurements off a standard gt6 for the gearbox flange height and angle too so as long as I mount the diff in the same orientation as the standard diff it should be all good for the uj angles on the prop.
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biturbo228
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Nice work on the mounts If it helps I've found Ford Cortina Mk1 leaf spring poly bushes (the front end of them) fit really snugly into 50.8x2mm tube without any modifications. Bolt hole in the crush tube is 1/2" so either that or M12 works nicely (as they do on my X/9's lower gearbox mounts). They're big beefy bushes, and the vibration's not too bad with the purple ones from powerflex. Part number's SPF0935K. Also, the UJ angles on the stock Spitfire and GT6 are all over the place. Completely different planes. They probably get away with it because they're normally so low powered, but it's one of my theories as to why they eat diffs when you put more torque through them/act like a hooligan. The constant changing of the shaft speed effectively puts pulses of higher torque into the gears which can't be good for them! Long and short of it is don't use the standard orientation as any sort of guide. Best options are either change the orientation of the engine and/or diff to bring the planes into better orientation than standard, or point the gearbox output flange directly at the diff and run a prop with a CV at the back (later 1500s had these as standard, but I'm sure any custom prop shop should be able to do you one). Or just run it with the standard orientation and test out my theories in the real world
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smith4
Part of things
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Feb 26, 2021 13:57:47 GMT
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Nice work mate! That's gonna be pretty mental once done. Good job on the chassis rails too.
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Feb 28, 2021 10:14:52 GMT
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biturbo228
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Feb 28, 2021 10:51:44 GMT
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Nice work TBH you can do away with all of that box section on the turret. It's only there for the stock engine mounts, and if you're making your own then no problem.
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Feb 28, 2021 11:00:48 GMT
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Those scissors must be good!
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Feb 28, 2021 11:37:58 GMT
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Nice snug fit there.
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Feb 28, 2021 12:26:29 GMT
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Those scissors must be good! Misses kitchen scissors cut anything 😂
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Feb 28, 2021 12:30:53 GMT
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Nice work TBH you can do away with all of that box section on the turret. It's only there for the stock engine mounts, and if you're making your own then no problem. I think just a trim then when I run the cross brace things shouldn’t move to much. With reference with prop angles I’ve over looked one glaringly obvious part. The omega gearbox uses a donut arrangement similar to the rotoflex coupling. In your opinion is this worth keeping. Would it help or hinder in alignment? Or is it going to be better to convert to a uj?
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Feb 28, 2021 13:05:16 GMT
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Keep the Giubo if you can, it will allow a little discrepancy with the prop angle.
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Feb 28, 2021 13:24:09 GMT
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Keep the Giubo if you can, it will allow a little discrepancy with the prop angle. That’s my thinking too and I’ve abused a fair few omegas and never had one fail massively.
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biturbo228
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Feb 28, 2021 15:06:55 GMT
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I doubt a guibo would cause any problems, and it'd be more of a pain to remove.
The more dead on you can point a guibo towards the diff the longer it's service life will be, but they do tolerate a bit of movement (depending on the design. Alfa 75 ones can move all over the place, but BMW ones don't like misalignment at all).
Guibo up front pointed at the diff, CV at the back. Job's a goodun 👍
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60six
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Feb 28, 2021 15:29:40 GMT
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That saab B204 lump you have there I think is just a stock 2.0i which is quite a bit different from the B204 that goes in the turbo models. I don't know how much bhp you want but there are quite a few differences between them. Piston cooling is one of the things I remember. I will try and find the info.
Are you using trionic ecu etc?
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Some 9000's, a 900, an RX8 & a beetle
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Feb 28, 2021 16:20:09 GMT
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That saab B204 lump you have there I think is just a stock 2.0i which is quite a bit different from the B204 that goes in the turbo models. I don't know how much bhp you want but there are quite a few differences between them. Piston cooling is one of the things I remember. I will try and find the info. Are you using trionic ecu etc? It is a turbo b204. I’ve just had to remove the turbo to make engine mount fab easier. It came out of a complete car that my mate was breaking. Part of the whole reason this conversion came about as he likes to put Saab motors in all kinds of cars (corsa, Astra, Peugeot 206’s.......). First retro sports car he’s seen so thought why not. I’m aiming for 250bhp as I’m sure the chassis won’t cope with much more. 300bhp does sound like a fun kind of death wish tho.
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60six
Posted a lot
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Posts: 1,679
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Feb 28, 2021 20:34:29 GMT
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That saab B204 lump you have there I think is just a stock 2.0i which is quite a bit different from the B204 that goes in the turbo models. I don't know how much bhp you want but there are quite a few differences between them. Piston cooling is one of the things I remember. I will try and find the info. Are you using trionic ecu etc? It is a turbo b204. I’ve just had to remove the turbo to make engine mount fab easier. It came out of a complete car that my mate was breaking. Part of the whole reason this conversion came about as he likes to put Saab motors in all kinds of cars (corsa, Astra, Peugeot 206’s.......). First retro sports car he’s seen so thought why not. I’m aiming for 250bhp as I’m sure the chassis won’t cope with much more. 300bhp does sound like a fun kind of death wish tho. Ahh that's cool - go for 300 - your power to weight ratio will be awesome!
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Some 9000's, a 900, an RX8 & a beetle
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