Terminator Posted November 25, 2002 Share Posted November 25, 2002 My EGT probe is at last measuring exhaust temperatures just out side the head , rather than measuring my under bonnet temperatures. A big thank you to Chris Wilson, you made it look so easy. It was great to meet you at last Chris, thanks for the reassurance about my engine, great to know the inside of my turbo’s are not sand blasted after my brief flirtation with the HKS mushroom. You have a wonderful home Chris, in a marvellous location, the dogs and peacocks were fantastic. I enjoyed the brief chat and the cups of tea were much appreciated. It was also reassuring to learn that one of Chris’ regular MKIV customers has done over 300.000 miles in his car, with all the original internals and turbo’s, so all you 100Kers you have along way to go. My first journey with the EGT probe in place , gave me a feeling of reassurance as the temps never rose above 800 even during 1.1 bar bursts, the air was cold and damp so I guess that helped it to keep temps down. At around 80- 85 leptons with little or no boost, the temp was fixed at 680. I have set the warning to 950 for the time being. I regularly fire pottery kilns to 1000 and from my experience 950 is very hot, a very bright orange in side a kiln, not really the colour what I want to see inside my cylinders. I realise short burst do little harm as the heat is dissipated quickly, but sustained temps this high will soon lead to melted pistons. It never ceases to amaze me how our engines cope with such extremes. 900+ degrees down to ambient or lower if the intercooler is working well and back to 900+, 1000 time a minute. Thanks again Chris, certainly worth the journey, all the best in the search for your next project and I hope the test at Silverstone lives up to expectations of your client. Quote Link to comment Share on other sites More sharing options...
Alex Posted November 26, 2002 Share Posted November 26, 2002 Glad you've got it fitted and have found you're safe.... On the subject of 100,000+milers - I borrowed a Borescope off of Gordon Flynn this week and have been able to look into Cylinders 3 and 4. I can report that my engine (which runs Optimax, Vavoline and 1.35-1.40 bar max) looks very clean and healthy. There is a small amount of crud around the outside of the pistons, but the valves are clean and nothing shows any signs of untoward happenings. The bore's are also clean no scoring. I don't know what my EGT's are - but from what I can gather I haven't experience DET yet so here's to the next 100,000 EDIT - Phil, what was your underbonnet temperature, by the way?? Quote Link to comment Share on other sites More sharing options...
Ian C Posted November 26, 2002 Share Posted November 26, 2002 I need mine fitting - how long did it take and what did it cost? -Ian Quote Link to comment Share on other sites More sharing options...
Terminator Posted November 26, 2002 Author Share Posted November 26, 2002 The gauge starts reading at 300 degrees C so it never showed under bonnet temps, just my way of saying I fitted the electronics ages ago just never got round to getting the probe fixed. I think Terry may have some data on under bonnet temp. Chris said allow up to two hours, just in case it becomes a pig of a job, which having seen him do it, is easy to see potential problems. I don’t think it took that long, but I was not clock watching and was enjoying talking cars and picking up tips. He only had to fit my probe, it cost me £55. Quote Link to comment Share on other sites More sharing options...
Nic Posted November 26, 2002 Share Posted November 26, 2002 Phil Good to hear you've got the EGT gauge properly fitted finally!!! cheers Quote Link to comment Share on other sites More sharing options...
Gaz Walker Posted November 26, 2002 Share Posted November 26, 2002 I need mine done, but just cannot justify travelling all that way (over 200 miles each way) just to get the probe fitted... Oh well, will just have to get more stuff Gaz. Quote Link to comment Share on other sites More sharing options...
eyefi Posted November 26, 2002 Share Posted November 26, 2002 gaz, get that single put on at the same time and really make the journey worth while. Quote Link to comment Share on other sites More sharing options...
Steve-H Posted November 26, 2002 Share Posted November 26, 2002 'great to know the inside of my turbo’s are not sand blasted after my brief flirtation with the HKS mushroom' Am i missing a well known issue with the HKS mushroom (Power Flow) filter ! ? Quote Link to comment Share on other sites More sharing options...
JamesG Posted November 26, 2002 Share Posted November 26, 2002 Originally posted by Steve-H 'great to know the inside of my turbo’s are not sand blasted after my brief flirtation with the HKS mushroom' Am i missing a well known issue with the HKS mushroom (Power Flow) filter ! ? Phil, I'd be interested to know what the problem with these is too. I have one on my Supra. Do they let too much grit and dust through? James. Quote Link to comment Share on other sites More sharing options...
Alex Posted November 26, 2002 Share Posted November 26, 2002 Originally posted by JamesG Phil, I'd be interested to know what the problem with these is too. I have one on my Supra. Do they let too much grit and dust through? James. Errm to be blunt - it has been said they are as useful Chocolate Fireguard. Quote Link to comment Share on other sites More sharing options...
JamesG Posted November 26, 2002 Share Posted November 26, 2002 Originally posted by Alex Holdroyd Errm to be blunt - it has been said they are as useful Chocolate Fireguard. Oh dear, sounds like I should get something different. This is the one I have: http://www.compsoc.man.ac.uk/~jamesg/gallery/supra/120_2059_IMG I don't have the original airbox as the car already had the HKS fitted when I bought it. Can anyone recommend a better filter? James. Quote Link to comment Share on other sites More sharing options...
Alex Posted November 26, 2002 Share Posted November 26, 2002 The cotton gauze filters by K&N and Apexi are better. The Apexi is known to be the best pod filter for flow and filtration, don't know why, but tests have been done... There is no perfect solution but the stock one wasn't bad...pod filers are best at making noise. Quote Link to comment Share on other sites More sharing options...
Terminator Posted November 26, 2002 Author Share Posted November 26, 2002 I guess I have to be careful, but tests have been carried out by performance mags that show some aftermarket filters to be less than effective at filtering out the crap. Your turbine blade rotate at 22000 rpm so a small particle is equivalent to a big rock when it hits the blades and takes out a chunk. When I was talking to Chris he describe some turbines as having a sand blasted look from particles that have passed through the filter to the blades. There are many posts on this if you search. The filter mentioned above is a good one better than most. I got rid on mine for two reason, first the abrasion factor and also the power loss associated with high under bonnet temps. The woosh tissss fewwww was great but not worth the costof turbo's IMHO, I prefer a dump valve and a hiper for noise. Chris advocates the use of the stock filter AFAIK. Quote Link to comment Share on other sites More sharing options...
Rich J Posted November 27, 2002 Share Posted November 27, 2002 http://www.mkiv.com/techarticles/filters_test/2/index.html Quote Link to comment Share on other sites More sharing options...
Sharpie Posted November 27, 2002 Share Posted November 27, 2002 Just out of interest is anyone using the Blitz Sonic ? http://www.blitz-uk.co.uk/blitzfilt.htm Quote Link to comment Share on other sites More sharing options...
Rich J Posted November 27, 2002 Share Posted November 27, 2002 Originally posted by Peter Sharp Just out of interest is anyone using the Blitz Sonic ? http://www.blitz-uk.co.uk/blitzfilt.htm I have seen one on an FTO, I noticed it uses a cotton filter rather then the metal mesh. Quote Link to comment Share on other sites More sharing options...
Sharpie Posted November 27, 2002 Share Posted November 27, 2002 I see. I'm gonna stick with the stock airbox anyway Quote Link to comment Share on other sites More sharing options...
Terminator Posted November 27, 2002 Author Share Posted November 27, 2002 I use a panel filter in the stock box .I have tried two types a TRD and a Toms the Toms was my final preference because visually the Toms offers more filtering. Both are washable so I have a clean filter every oil change @ 2.5K miles, just rinse out with petrol dry and spray with oil. I keep a spare paper filter for use when I am drying out of my panel filter. As for performance I have noticed no difference by going from the HKS to the panel, in cool weather, but a huge difference in hot weather and low speeds, I used to get a real loss of torque from a standing or low speed start in traffic. Once I got moving the effect diminished, but returned as soon as my speed allow under bonnet temps to rise. On the track it was terrible, unless I took the head lamp out. As engine temps are so much higher on the track, I really noticed the loss of power after slow speed corners. I felt like there was noting under the bonnet until the hot air cleared the intake system. Quote Link to comment Share on other sites More sharing options...
Nic Posted November 27, 2002 Share Posted November 27, 2002 On the subject of temperatures on performance, the temperature has dropped here from 30+ to less than 20 degrees over the course of this last week. I have noticed a huge difference in the feel of the car in the cooler weather, it feels more powerful at slower speeds. I have also noticed that the turbos seem to boost more easily eg. in 1st and 2nd they now boost easily to 1.4bar where as before they would only reach 1.2-1.3bar, is this the effect of the ambient temperature also? Quote Link to comment Share on other sites More sharing options...
Terminator Posted November 27, 2002 Author Share Posted November 27, 2002 I would suggest it may be a contributory factor, but you have just had a significant tune up, so much of the improved response may be down to that. You will just have to wait for temps to get above 30 again to really find out. May be someone who knows moreabout Boyles Law (?) wil jump in here. Quote Link to comment Share on other sites More sharing options...
Nic Posted November 27, 2002 Share Posted November 27, 2002 It was a couple of weeks ago that I picked up the car and it was about 32degree at the time, it is since then that the temp has dropped and I've noticed the performance difference. Quote Link to comment Share on other sites More sharing options...
Terminator Posted November 27, 2002 Author Share Posted November 27, 2002 Sorry I did not realise that Nic. Then it is most likely the drop in temps. Quote Link to comment Share on other sites More sharing options...
Terminator Posted November 29, 2002 Author Share Posted November 29, 2002 The highest temperature I have seen is 800 at about 17 psi. In the cold damp air tonight and most days this week. How does this compare anyone else? Does this mean my fueling is not going lean at this boost level? Quote Link to comment Share on other sites More sharing options...
Adam W Posted November 30, 2002 Share Posted November 30, 2002 Those numbers sound just fine Phil, 800C is comfortable, 900C is pushing it, 950C+ is danger zone. Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted November 30, 2002 Share Posted November 30, 2002 I've seen 1000! And I could hear detonation! - Frightening That was before changing fuel pumps, upping the pressure, and fitting Chris's restrictor plate. Now I run at about 800 at 1.1 bar and 900 at 1.3. The highest I've seen it go recently was 950 and the boost peak was 1.35. I've now fitted a buzzer to give audiable warnings at 1.32 bar or 925 degrees... Whichever comes first. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.