Str8jacket Posted January 6, 2018 Report Share Posted January 6, 2018 Nice weave! 1 Quote Link to comment
Str8jacket Posted January 6, 2018 Report Share Posted January 6, 2018 If you dip a bit more filler in the puddle you will get less under cut. With the nice consistent pattern you have there you will get some really nice welds. Awesome job for first run. I have been learning for a while and its still hit and miss. 2 Quote Link to comment
bigboy620 Posted January 6, 2018 Author Report Share Posted January 6, 2018 Thank you! I will try more filler rod. It's an art to tig weld aha. 1 Quote Link to comment
Str8jacket Posted January 7, 2018 Report Share Posted January 7, 2018 Hey mate have you got a photo of the bracket that goes to the rear of the engine to the bellhousing to the trans? Mine was off two different vehicles and i dont have the brackets or plate that fits there. I am assuming there is a support bracket but maybe its just a dust cover? 2 Quote Link to comment
bigboy620 Posted January 7, 2018 Author Report Share Posted January 7, 2018 There is a bracket. I'll post a picture in a minute 2 Quote Link to comment
Str8jacket Posted January 7, 2018 Report Share Posted January 7, 2018 There is a bracket. I'll post a picture in a minute Thanks for that photo. Is there also one on the other side? They going to be hard to make look nice hand made. Will need to rethink my sump mods too now. 1 Quote Link to comment
bigboy620 Posted January 7, 2018 Author Report Share Posted January 7, 2018 it's two piece. 2 Quote Link to comment
Str8jacket Posted January 7, 2018 Report Share Posted January 7, 2018 Cant be there for much of a support for the trans, more to support the dust cover? 2 Quote Link to comment
Stoffregen Motorsports Posted January 8, 2018 Report Share Posted January 8, 2018 It's there for NVH (noise, vibration and harshness) which became important in the late 80's. Not a very structural piece, but it might help with engine harmonics. 2 Quote Link to comment
Str8jacket Posted January 8, 2018 Report Share Posted January 8, 2018 It's there for NVH (noise, vibration and harshness) which became important in the late 80's. Not a very structural piece, but it might help with engine harmonics. That is good to know, thanks. Its hard to make something as light but as strong as a pressed bracket like that, atleast a piece of 5mm plate will ne enough. My 5 speed on the 20b had heavy cast brackets that definately helped support the box. 1 Quote Link to comment
bigboy620 Posted January 12, 2018 Author Report Share Posted January 12, 2018 I didn't want to cut the firewall, so I started on my own manifolds. 3 Quote Link to comment
wayno Posted January 12, 2018 Report Share Posted January 12, 2018 There are as many different exhaust manifolds as there are VG engines in different make vehicles, I am sure one of the models will work, it may be a different model depending on the side though, Jason(yello620) found what he needed for his VG30 Datsun 620. 2 Quote Link to comment
bigboy620 Posted January 12, 2018 Author Report Share Posted January 12, 2018 He used 200sx independent headers that met under the transmission. Those are an option but hard to find. I need the crossover pipe for the turbo. Plus the oem vg30et turbo manifold is a super tight fit. I'm going to try and mount the turbo behind the driver side high beam light. 3 Quote Link to comment
Str8jacket Posted January 12, 2018 Report Share Posted January 12, 2018 I like it. The standard ones are garbage. I would slit between each flange or at the very least slot all the stud holes or ot will break the exhaust studs off when hot. What turbo are you going ro run? 2 Quote Link to comment
bigboy620 Posted January 12, 2018 Author Report Share Posted January 12, 2018 The stock vg30et for now. Do you mean to slot the manifold in bewteen eachave cylinder? 1 Quote Link to comment
Stoffregen Motorsports Posted January 12, 2018 Report Share Posted January 12, 2018 I love the classic simple look of a log manifold. They don't always work great, but a turbo motor won't care as much. 2 Quote Link to comment
Str8jacket Posted January 12, 2018 Report Share Posted January 12, 2018 The stock vg30et for now. Do you mean to slot the manifold in bewteen eachave cylinder? Yeah you will need to allow room for expansion, especially being a straight section of tube it will grow like 3-5mm when hot and will break exhaust studs. It needs to be able to move. If you look at the standard mani it will have 2 holes that are small just to go round the stud for a accurate location when installed, the others will be a lot larger and a loose fit to allow the manifold to move around when hot. Put a 300mm length in your vice and heat it to 400*C and measure it when hot. The other thing is the header plate itself will also grow and then the pipe and plate will be fighting to move. I think the log mani will be fibe for the HP required to make a 620 terrifying on the highway in the wet! Nice smooth transitions into the merge from both banks, no sharp turns before the turbo and it will be sweet. What tubing are you using for the cross over? Are the standard turbos divided? If so keep your mani the same, I prefer to have the wastegate work from both banks though. Have you had an eye over "maximum boost" by Corky Bell? Good book. Follow as many tips as you can and dont get hung up on what you cant and you will be surprised how good it will work. Helped build some low budget cars that have been better than the ones with every brand name in the catalog by following sound principles in that book. 2 Quote Link to comment
sebpv Posted January 12, 2018 Report Share Posted January 12, 2018 Get it sandblasted then hit it with enamel clear. It will look like stock. 1 Quote Link to comment
bigboy620 Posted January 12, 2018 Author Report Share Posted January 12, 2018 I love the classic simple look of a log manifold. They don't always work great, but a turbo motor won't care as much. simple works for me now as I'm just learning to tig. I would like to try n make some crazy looking headers, but my skills and space limit me. Ahah 1 Quote Link to comment
bigboy620 Posted January 12, 2018 Author Report Share Posted January 12, 2018 Yeah you will need to allow room for expansion, especially being a straight section of tube it will grow like 3-5mm when hot and will break exhaust studs. It needs to be able to move. If you look at the standard mani it will have 2 holes that are small just to go round the stud for a accurate location when installed, the others will be a lot larger and a loose fit to allow the manifold to move around when hot. Put a 300mm length in your vice and heat it to 400*C and measure it when hot. The other thing is the header plate itself will also grow and then the pipe and plate will be fighting to move. I think the log mani will be fibe for the HP required to make a 620 terrifying on the highway in the wet! Nice smooth transitions into the merge from both banks, no sharp turns before the turbo and it will be sweet. What tubing are you using for the cross over? Are the standard turbos divided? If so keep your mani the same, I prefer to have the wastegate work from both banks though. Have you had an eye over "maximum boost" by Corky Bell? Good book. Follow as many tips as you can and dont get hung up on what you cant and you will be surprised how good it will work. Helped build some low budget cars that have been better than the ones with every brand name in the catalog by following sound principles in that book. Yea I noticed that some of the holes were larger. I wouldn't want to snap some studs. It would be a nightmare to replace them. I will cut some slots in between each cylinder. I was thinking of using the stock crossover pipe. Imy goinghia to delete the internal wastegate and go with external. No I haven't, I will take a look at it for some insight. Thanks man 2 Quote Link to comment
bigboy620 Posted January 12, 2018 Author Report Share Posted January 12, 2018 Get it sandblasted then hit it with enamel clear. It will look like stock. sounds like a plan to me aha 1 Quote Link to comment
bigboy620 Posted January 16, 2018 Author Report Share Posted January 16, 2018 Mounted the turbo so I can start making the manifold. 1 Quote Link to comment
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