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 1137 Posts Member #: 1450 Post Whore Near Paris - France |
2nd Jul, 2012 at 07:24:41pm
What about your head work ?
Rusty by nature
On 23rd Jun, 2008 paul wiginton said:
They said "That sounds rough mate." I said "Cheers it cost me a fortune to make it sound like that!" |
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 774 Posts Member #: 6724 Post Whore Wootton Bassett |
2nd Jul, 2012 at 10:11:02pm
On 2nd Jul, 2012 Advantage said:
What about your head work ? With a 10:1 CR, isn't it top of the list ? I have only simple plans for the head. Just a bit of deshrouding and basic flow improvement. Valve sizes should be same as standard turbo head. I'm looking to achieve about 100 bhp around 6000 rpm so this should be adequate. The aim of this is a nice road motor. Minimal lag, with the turbo mainly topping up the standard MPi engine to give a bit more pull at the top end. The metro turbo was 9.4:1 CR and i've seen it run 7 psi fine (and without an intercooler). So I'm looking to test out if my increase to 10:1 CR can be offset with intercooling (which seems reasonable to me). Also I will be fabricating the manifolds so am looking to improve performance with tuned length inlet runners (based on Paul S' work) and try to reduce the disruption induced in the turbine outlet by the internal waste gate by separating the turbine and gate flows as best I can. |
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774 Posts Member #: 6724 Post Whore Wootton Bassett |
2nd Jul, 2012 at 10:14:49pm
Stripped the head off to fine a gunky cylinder. I guess this is just condensation in the cylinder which was open to atmosphere where it has been sat for a few years?
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1137 Posts Member #: 1450 Post Whore Near Paris - France |
3rd Jul, 2012 at 08:30:11pm
Head work, I was thinking polishing to reduce the likelyhood of pinging Rusty by nature
On 23rd Jun, 2008 paul wiginton said:
They said "That sounds rough mate." I said "Cheers it cost me a fortune to make it sound like that!" |
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774 Posts Member #: 6724 Post Whore Wootton Bassett |
3rd Jul, 2012 at 09:54:20pm
oh, i was unaware of that. Please could you explain how it helps? |
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774 Posts Member #: 6724 Post Whore Wootton Bassett |
3rd Jul, 2012 at 10:03:52pm
stripped the block a bit more. found some pitting on the cam. anyone got advice as to whether this is too much wear to use. If so can i get it repaired?
Edited by dan187 on 3rd Jul, 2012. |
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 (2)[/url] by [url=https://www.flickr.com/photos/150672766@N03/]Rod Sugden[/url], on Fli) 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
4th Jul, 2012 at 07:21:01am
Gasket most likely an AF470, used on (I think) all the later models, same black composite as the BK450 just with a built-in rubber seal ring around the oil feed hole to stop oil leaks from that area. Schrödinger's cat - so which one am I ??? |
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1137 Posts Member #: 1450 Post Whore Near Paris - France |
5th Jul, 2012 at 03:50:29pm
On 3rd Jul, 2012 dan187 said:
oh, i was unaware of that. Please could you explain how it helps? polished chambers expose less area to the flame front so more heat stays in the chamber heating air (more efficiency) and every area of the chamber cools in a more uniform fashion being the same distance from the water core and having been more reflective to the heat. It is all in Vizard's book. Polished exhaust helps too by not loading the coolig circuit with avoidable heat. It also prevents the carbon build up (nothing to grab on) Rusty by nature
On 23rd Jun, 2008 paul wiginton said:
They said "That sounds rough mate." I said "Cheers it cost me a fortune to make it sound like that!" |
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774 Posts Member #: 6724 Post Whore Wootton Bassett |
5th Jul, 2012 at 06:18:43pm
ah ok i see. I would imagine it is a trade off between smoothing the chamber to reduce the chance of pre ignition from hot spots created by the surface asperities vs auto ignition from compressing the hot charge and having a rough surface to remove heat from the charge.
Edited by dan187 on 5th Jul, 2012. |
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 1755 Posts Member #: 8852 Post Whore leicestershire |
5th Jul, 2012 at 07:33:02pm
Id ditch that cam, the followers are likely to pick up on it 13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat! |
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1137 Posts Member #: 1450 Post Whore Near Paris - France |
8th Jul, 2012 at 08:16:21pm
On 5th Jul, 2012 dan187 said:
ah ok i see. I would imagine it is a trade off between smoothing the chamber to reduce the chance of pre ignition from hot spots created by the surface asperities vs auto ignition from compressing the hot charge and having a rough surface to remove heat from the charge. I feel the chamber is not a place where heat is likely to be removed from the charge. We're burning gas to heat air for it to expand and push a piston. Some of this heat dissipates in the combustion chamber and piston crown. The least area, the least dissipation, the more heat available to drive the piston down. As for the hot charge, we want to avoid it as much as possible (hence polished chambers and exhaust : less heat in the cooling circuit) but in the head I think it is too late. Rusty by nature
On 23rd Jun, 2008 paul wiginton said:
They said "That sounds rough mate." I said "Cheers it cost me a fortune to make it sound like that!" |
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774 Posts Member #: 6724 Post Whore Wootton Bassett |
11th Jul, 2012 at 08:59:24pm
Started making me some flange today...
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774 Posts Member #: 6724 Post Whore Wootton Bassett |
22nd Nov, 2012 at 03:09:55pm
Unfortunately progress has been slow due to being in Japan with work.
Edited by dan187 on 22nd Nov, 2012. |
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774 Posts Member #: 6724 Post Whore Wootton Bassett |
8th Jan, 2013 at 11:26:43pm
MS3X build is slowly coming on spent a couple hours this evening setting it up and soldering. Also gearbox strip has started but waiting on a 1 1/8" socket to arrive in post.
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 882 Posts Member #: 9774 Post Whore Buckinghamshire |
8th Jan, 2013 at 11:51:27pm
Looks good, where're you planning to mount the interfooler? http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0 |
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774 Posts Member #: 6724 Post Whore Wootton Bassett |
9th Jan, 2013 at 12:05:21pm
not yet decided am going to investigate space once i have the engine in place. One option is to have it where the side mount rad would have been and make a duct to channel the air to it. My car has a side mount electric fan that i could link to the IAT and set to come on if it gets hot. Edited by dan187 on 10th Jan, 2013. |
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882 Posts Member #: 9774 Post Whore Buckinghamshire |
9th Jan, 2013 at 01:06:32pm
That's clever, I was just curious about the sort of space for the intercooler you have with a front mount rad, didn't occur to me to put it where the radiator was http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0 |
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4018 Posts Member #: 1757 Back to Fucking Tool status Swindon |
10th Jan, 2013 at 02:05:48am
Ditch that blow off valve they are shit, same as on my clio, mines now removed and just using the wastegate. I found on part throtle it was leaking when plumbed closed and open. Tried a replacement also the same problem, have been looking into one of the new bmw petrol turbos for a replacement might be worth whike for you as well. Drives
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774 Posts Member #: 6724 Post Whore Wootton Bassett |
10th Jan, 2013 at 12:33:52pm
On 10th Jan, 2013 Paul R said:
Ditch that blow off valve they are shit, same as on my clio, mines now removed and just using the wastegate. I found on part throtle it was leaking when plumbed closed and open. Tried a replacement also the same problem, have been looking into one of the new bmw petrol turbos for a replacement might be worth whike for you as well. I know what you mean, I have one on my 998 turbo. The first one i bought was like that. The replacement has been fine though. |
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 6729 Posts Member #: 618 Post Whore Glasgow |
10th Jan, 2013 at 12:57:51pm
I've had no issues with the bosch valves in any of the cars I've run them...... |
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4018 Posts Member #: 1757 Back to Fucking Tool status Swindon |
10th Jan, 2013 at 01:34:37pm
I have had three on the clio and all have leaked maybe ita just how the car is setup but its anoying as hell, my mums got the same car as me he bov works fine on mine but having three fail seems a waste. I did have on off of a ford again boosh, which was fine but didnt fit the recurc on the clio as it was smaller. Drives
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774 Posts Member #: 6724 Post Whore Wootton Bassett |
17th Jan, 2013 at 11:28:43pm
With all this cold weather i've been tinkering indoors. So now the MS3X is ready to run. I've had connected to the laptop and been browsing the menus. Given it a basic setup, so it should run (once the engine is built and in the car).
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774 Posts Member #: 6724 Post Whore Wootton Bassett |
22nd Jan, 2013 at 11:10:32pm
Finally have bits together for the exhaust manifold so i need to start learning to TIG.
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 85 Posts Member #: 3600 Advanced Member Gateshead |
23rd Jan, 2013 at 09:12:08pm
I would be interested to know where you bought the tube for your exhaust manifold. What is the diameter and w/t? Thanks |
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774 Posts Member #: 6724 Post Whore Wootton Bassett |
23rd Jan, 2013 at 11:07:25pm
ebay just a general search. it's 1 1/4" diameter. w/t = weight? if so then not sure i'm afraid. pretty light |
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