do you know off hand how much longer the rb is than the vh chris? and dont say the rb is 2cyl longer lol...
Lol, not really. In Zturbo's he had to mount the radiator under the rad support. So I guess another 60-80mm or so. If you have spare one I'll chuck it in and see Wouldn't mind doing a 30/26 into a Z, that'd be pretty good I reckon.
It's only that I've seen the resultant cracking and the guy trying to fix all the cracks said they were caused by tacking the runners together. It's your call but to reduce future grief, I'd recommend cutting the tack welds.
Got the drivers side extractor done. Not fun at all. Only just clears, like a few mm. Here's lotsa piccies, nothing too different from last time. How I got them in the right place was by starting with the 4th runner and tacking the collector where I wanted it, then did the start of the 1st runner to give me a good idea how much room I had to play with. Took it off the engine then did the rest on the bench with a test fit every so often. Also cut a dirty great hole in the bonnet. The engine doesn't stick through as much as I expected. I used a damaged sparesy I had hanging around (look familiar r33k?) This was more for my own amusement than anything. I'll take my good original bonnet to get modified by someone who knows what they are doing Anyone recommend someone who can make me a scoop out of ally?
Thanks Erik, shouldn't be too long at all now. Everything is coming together nicely, which is a suprise... I must say the exhaust manifolds where a LOT easier than I was expecting, thought that would take weeks to get done. If anyone is thinking about it, give it a go.
Once you work out in your mind how you want the pipes to run, they come together real quick. Took me longer to make the mounts than the manifolds.
Umm, about $600 I think That was for 7 of 180deg mandrel bends, 4 of 90deg mandrel bends, 4 of 45deg mandrel bends, 2 of 1 5/8" to 3" collectors, 4 of 3" flanges with bolts and gaskets, 2 of O2 bungs, exhaust gasket paper stuff to make new gaskets for the heads, 3m of 1 5/8" exhaust pipe and I think that was about it. If I was going to do it again I would have got only 180deg mandrel bends as they only cost 50% more than the 45's and 90's but you get heaps more bend for your buck. Also didn't need anywhere near as much pipe as I bought, 1m would have been heaps. The bends come with 150mm on each side of the bend. Also used 6 fineline cutting discs and a grinding wheel and a flap disc. Flap discs rule! Much more controllable than a normal grinding wheel. Yep, I think I was the same, lot of mucking about with the mounts (I'm still not happy with mine). And that enormous Holset wouldn't fit, the compressor housing and actuator are just too big. Interesting thing is though the inducer on the compressor is the same size as the TO4B2 I have. It has a much 'fatter' housing, but with a smaller radius. I'll drop it back to you sometime soon.
Chris! give the purple people eater some respect and wipe off the dust Wondered where that bonnet got to
Since the engine only sits above the bonnet marginally, could you rework the bonnet to have a 'power bulge' down the centre instead of the scoop? That way it would still be one piece.
Yep, I picked it up from AMEC when they shut down. I'll give it a wipe tomorrow That's the plan, don't want a scoop as such, just a cover of some sort. Something like this Pinched from Mungyz
what size holset did you try to fit? A HX50? anything smaller and it better be the 6 or 7 blade version or it will choke pretty quick. Really impressive stuff chris, very close now. Mind giving a rough break down on price, specifically the collectors and 180* bends. The prices I got for the collectors were huge
A hx50 is a bit of overkill, those will go 1200hp + on a 5ltr v8. It was a hx35w which should give a lazy 500hp on a vh. The holsets are also available in many different configurations aswell so not all hx50's are the same, just like not all t28 garrets are the same.
from the maps I've seen the 6 blade HX35 might do that but not the 8 blade, it just doesn't have the width in the bottom of the map. The HX35 would be awesome on a smaller engine with a different rear housing because of the ability of the turbo to push high flow at very high pressures, but on a larger engine it will choke at low boost and large flow. I found a H2E (9551BA) to be a laggy choice for the VH being inside 70% efficiency @60Lb/min @ 10psi but wouldn't spool until the engine reached 35lb/min (4500rpm?) The H2C (8625N) had better width and was just outside of the 70% island @60LB/Min, 10psi so a more streetable turbo Anyway, I have collected and compared info on a lot of the holsets, but this thread probably shouldn't be whored out with that
Love your work Chris . You never cease to amaze me with your endless tallents Will have to pop over next time im down your way and have a look at the beast
Almost all maps on the net of holsets are not accurate as holset does not release their maps. An example of that is comparing the h2e to the h2c, the h2e has a turbine housing 3cm2 smaller than the h2c, this will make it a more responsive turbo and should produce usable boost around 2500rpm. Sorry for whoring chris but its not often you can get other info on holsets.
Because of $$, it's about USD$2000 for a kit to start making them myself, then I need to muck around with modding lower runners, throttle linkages, fuel rails etc. Massive exercise. Maybe later when I have nothing to do and lots of spare money clogging my accounts up Collectors were $40 ea, the 180deg mandrels where $30 ea. The bends are overpriced IMO. I gave OneSteel a call when i was still working and a 90deg bend in 1 5/8" was about $1.80... Rang them again to order and they said they didn't have them Anyway... It was a HX40W, it's got 6 blades (or is that 12? It is if you count the baby blades under the big ones) Here are some piccies comparing my TO4B2 to Eric's HX40W. Same inducer, didn't want to pull the housing off the Holset as it's not mine to measure the exducer Sure thing Chris, next time your in Brissy give me a yell. Never a problem It's interesting whoring so I like it
The 6 Blade HX40 is one of the most sought after Holsets, huge flow and map width and very good spool characteristics. Would suit the VH very well. Is there room for it up front?
