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Post by Andy on Jul 28, 2012 8:21:45 GMT
Hi Paul have u sorted the roll bar design yet
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Post by Paul (madeye) on Jul 28, 2012 8:29:49 GMT
haha, nope, and i think its gonna take a while now, im looking at something a bit different for the air intake so it will need to work around that i think. on the flip side i think i have found a chassis colour, lightning cherry, a really deep dark cherry/black with a metallic fleck
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Post by Deleted on Jul 28, 2012 10:28:40 GMT
Paul, Just as a note before you weld your engine mounts in, i did a test fit of my mtx75 transmission and engine this week. The pictures will be on my build page shortly. I would build up your rear hubs, and wishbones as a mock up, as you may find a small alignment issue. The engine mount is perfect, the rear dogbone mounting needs moving right towards the engine, and the gearbox mount backwards, or a new gearbox mount designing. The engine and MTX75 has a slight alignment issue, which may not bother some, but I want the shafts perfectly straight. Shown on pictures I used a laser through the drivers side rear hub, aimed through the gearbox differential to highlight the problem.
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Post by Paul (madeye) on Jul 28, 2012 14:13:40 GMT
haha, 2 minds think alike.. well at least we know that a skyline rad wont fit unless its in the drivers compartment.. lol also did the QR conversion, had to go to bloody halfords and hack up a spanking new deep socket also got a pair of landrover valve springs to stop metal on metal at the end of the travel, just popped home to collect them now as i forgot.. UPDATE.. i only needed one spring and cut it in half, so i have a spare if anyone wants it for theirs, just takes off that metal t o metal clunk at the end of travel, and helps to centre again paul
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Post by Deleted on Jul 28, 2012 14:55:56 GMT
Looking good so far, and on the subject of powder coating, a guy up here did mine, less than £200 done.
Maybe a bit of a drive though to Merseyside.
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Post by Paul (madeye) on Jul 28, 2012 21:08:10 GMT
what a day, emotional times all round, tried to offer up the engine but the mounts were about 2" off on the gearbox side, and its out on the lower torsion too. we knew it would need a little fettle though, anyone doing the mtx in future it requires longer LHS mount brackets, ill illustrate on a pic later on. i have used the RHS mount as the reference point as that is the correct one that RTR have fitted for 2.0 zetec blacktops many times before. this is just the mock up engine and box as the new stuff is just being built to spec. the mtx 75 is the same externally as the RS one we have sourced. although the engine is not square in this pic. you can see that the engine mount holes are never going to fit on the chassis mounting bracket, they need to be approx 20mm longer on each end to give enough space to drill and also have enough meat to have an effective fix. looked at working on these but think ill just make some new ones (ill photo and measure and inform RTR for future builds). Brackets removed from the chassis so it can be lined up correctly. ill add notes in a bit im knackered and need to see the wife and kids for a bit. i also pressed the bearing races into the RD uprights so i can look at the brakes tomorrow in my garage paul
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Post by airforceone on Jul 28, 2012 21:33:11 GMT
Hi Paul
Couple of questions on the MTX75 Box.
What is the weight, does it have an LSD or any other advantage over the IB5 box.
Only asking as a possible upgrade for mine in the future. I know power wise It's good To about 250bhp without upgrading internals.
The IB5 is good to about 200bhp anything over that and it will need internal work also But I believe It's quite a bit lighter than the MT.
looking at turbo options for an upgrade next year so the IB5 will need some work Which won't be cheap but a swapout with an MT May be a cheaper.
Cheers
Ned.
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Post by Paul (madeye) on Jul 28, 2012 21:39:52 GMT
the ib5 is just the older box, it was changed around 2003 as far as im led to believe. no lsd unless you fit one. keep an eye on mine and steves mounting issues though. not sure on the weight, online should find that. in general its just an age upgrade i imagine. dont forget i still have 1 turbo left if you want it.. cheap as chips, i could do with the funds to be honest.
paul
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Post by Deleted on Jul 28, 2012 22:55:07 GMT
The mtx is used in the focus RS, difference being the addition of the helical ATB diff.
I know of mtx's running 450 plus in focus rs, and reliable.
The getrag st170 6 speeds are good too. Don't get me wrong, the ib5's are good;)
The MTX, It's heavier, bigger, and stronger. But I don't know how heavy yet. I suppose Mabbs car is the weight benchmark we will compare too;)
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Post by Paul (madeye) on Jul 29, 2012 6:34:56 GMT
The mtx is used in the focus RS, difference being the addition of the helical ATB diff. I know of mtx's running 450 plus in focus rs, and reliable. The getrag st170 6 speeds are good too. Don't get me wrong, the ib5's are good;) The MTX, It's heavier, bigger, and stronger. But I don't know how heavy yet. I suppose Mabbs car is the weight benchmark we will compare too;) nice one steve, more answers than i had mabbs is on the IB5 box as far as i believe but with new straight cut gearing
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Post by Paul (madeye) on Jul 29, 2012 6:58:06 GMT
a quick line shetch over the mount picture if you can see it, just needs mirroring on the other side too then maybe a little trimming up to look nice. then the entire mount need to move rearwards approx 50mm, will confirm next week when we tack it on and are happy
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Post by Paul (madeye) on Jul 29, 2012 7:25:26 GMT
another small point, the lower torsion mount is not tall enough to accept the standard mount with a powerflex bush in it, hence why in the fitting it is empty, see pic above, the width and depth are fine but the bush sits proud approx 5mm both top and bottom
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Post by Paul (madeye) on Jul 29, 2012 7:26:42 GMT
not with the chassis today so im going to mock up a makeshift wheel station somehow in the garage and trial the discs and calipers
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Post by mabbs on Jul 29, 2012 8:13:56 GMT
Hi Paul,
My gearbox is an IB5 with Quaife straight cut close ratio gearing. The two main reasons I upgraded the gear kit is so that the gears can take the torque/power and the gearing itself. In the standard IB5 gearing, the 1st gear is very short so if your doing any track days, from the line your changing into 2nd very quickly. Also 5th is very long. My gearbox with the Quaife LSD and gearkit is great gearing.
The MTX gearbox has better gear ratios as standard than the IB5 and will take a good amount of tourque - well over 300ftlb as standard which is a lot !! but it is heavier and bigger but only by a little. All in all, as a strong gearbox with good ratios and cost effective then the MTX is a good option.
The other thing to consider is how the power/torque is being delivered. Supercharging an N/A are very smooth linier power where as turbo charging is quite violent in comparison and will put more stress on all internal components - espesially the gearbox.
One thing i don't think has been mentioned yet is the clutch. If you are looking to do track days (driving hard) and going over 220 bhp/180 ftlb I would stongly advise upgrading your clutch as it wont last long !!
Sorry if you have already sorted all these areas, but I know how frustrating it is to work back wards !!!
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Post by Paul (madeye) on Jul 29, 2012 9:08:52 GMT
cheers john, clutch was already in mind, i also found out that i already have a solid mass flywheel not dual mass. good job as i was looking into solid anyway if it needed converting. mocked up the hub on the bench corner, just fitting discs now.. also just a quickie, not to teach to suck eggs, but we all know grease is horrible, i got this for the race bike from a mountainbiker, its actually for pushbike forks, but its a great bit of kit. pushes out a thin bead of grease without covering the world. sorry if i insult anyone with this but it may help someone.. paul
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