Fuel Injected Bridge Port project finally underway :)
09-03-08, 01:06 PM
#76
Ok I now have 580 km on the engine. 420 more to go before im ready to open her up and get on the dyno. Good news is I managed to sell some old radio control cars I had so I've decided to order a lc-1 wideband 02 sensor from diyautotune just to make things easier and safer once I start with WOT tuning. I have managed to get the tune pretty good so far for slow driving and cruising on Alpha-N with only a narrowband. Only thing is that on increased load (up hills etc.) it leans out a little bit. This is partially why I want the wideband, so that I can set my AFR targets and let my ego correction keep the AFR's safe under different loads. I get around 30mpg on the open road. I'm getting excited, almost there 
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09-14-08, 07:20 AM
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Finished break-in
Ok...I recently installed my LC-1 wideband 02 sensor and it made tuning a breeze. Seeing as the car was running well I went for a long drive and finished off the break-in. Went yesterday and opened her up and WOW. Car is very very fast, and in the upper rpms my AFR's were still as low as 10.6 so theres still more power to be gained. A few more WOT logs and some VE analysing in Megalogviewer and im sure i'll pull even more power, not that I really need any more. Its pulls hard from 3000pm all the way up to 9500rpm. In first gear it hits limiter very quickly and gives some serious stomach wrenching acceleration through every gear. 100mph comes up rather quickly 
. Also need to tune my acceleration enrichment as engine gives a little choke when you suddenly apply throttle, but it overcomes that almost instantly and then things get fun. Im extremely happy and relieved after all the hours and hard work i've put into this thing shes finally running like a champ. Will start getting the AFR's up to more reasonable values like 12.5 and perhaps up to 13.5 - 13.7 at WOT as recommended by some people on the megasquirt section. Wont jump straight there though, would rather get a feel for what works well with this engine. Once thats done I must just find some money and get the car on the dyno. I know my current header isnt great but I thought id get a dyno run in before I get a new one made just so I can see the difference.
I have a short vid which I will get up soon and ill try take some others ASAP.
. Also need to tune my acceleration enrichment as engine gives a little choke when you suddenly apply throttle, but it overcomes that almost instantly and then things get fun. Im extremely happy and relieved after all the hours and hard work i've put into this thing shes finally running like a champ. Will start getting the AFR's up to more reasonable values like 12.5 and perhaps up to 13.5 - 13.7 at WOT as recommended by some people on the megasquirt section. Wont jump straight there though, would rather get a feel for what works well with this engine. Once thats done I must just find some money and get the car on the dyno. I know my current header isnt great but I thought id get a dyno run in before I get a new one made just so I can see the difference.I have a short vid which I will get up soon and ill try take some others ASAP.
I cant wait to get mine back together reading this lol..
09-14-08, 04:08 PM
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Heres the vid. He pulls away slowly and only hits the gas once hes gone past the camera and his shift into second isnt very good. I had a much better run straight after him which really kicked but typically my friend wasn't recording 
. Sorry about the quality i'll take some good vids once i've finished tuning.
http://video.google.com/videoplay?do...76231801086888
. Sorry about the quality i'll take some good vids once i've finished tuning. http://video.google.com/videoplay?do...76231801086888
10-01-08, 05:15 AM
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First trip to the dyno
Ok so I got the car on the dyno just to see where im at. I knew my setup wasnt optimal but wanted to get an idea of where im starting from. Please note the figures on the graph are in kilowatts and N/m so my peak WHP was 192whp and peak Torque was 140 Foot pounds. Im happy with the result as I know how much I can still do to squeeze more out of the engine.
Timing - Leading total advance: 20*
- Trailing total advance: 13*
Car was running quite rich. I am hitting as low as 11's at high rpm which is WAY to rich and you can see how the power stops climbing at that point. I will bring the AFR's up to 13+ and should see some good gains. I have also shortened the trumpets/ram tubes on my throttle bodies as I want to see if I can get some more high rpm power from that. Im also going to better match my intake manifold to my throttle bodies. I think the most important thing however is my header. The primaries are far from equal length and are crush bent, im pretty sure the header is choking the engine at high rpm. I also think my middle muffler may have disintegrated
. So my next project is to fabricate a decent, short header system and at the same time open up that muffler and see whats what. I want to try and take advantage of being able to rev to 9500rpm which is why I have shortened my trumpets and why i'm going to shorten my primaries, i'm hoping it will help give me more power at high rpms.
I also feel the engine prefers a bit more advance than 20* but was being conservative for now. Once I have the tune perfect and the exhaust system done properly ill start adjusting the timing. Im fairly confident I can get quite a lot more power ( I reckon 210whp - 230whp isn't completely out of the question). Car is very quick already so im happy, just wanting to get the most out of my setup.
Timing - Leading total advance: 20*
- Trailing total advance: 13*
Car was running quite rich. I am hitting as low as 11's at high rpm which is WAY to rich and you can see how the power stops climbing at that point. I will bring the AFR's up to 13+ and should see some good gains. I have also shortened the trumpets/ram tubes on my throttle bodies as I want to see if I can get some more high rpm power from that. Im also going to better match my intake manifold to my throttle bodies. I think the most important thing however is my header. The primaries are far from equal length and are crush bent, im pretty sure the header is choking the engine at high rpm. I also think my middle muffler may have disintegrated
. So my next project is to fabricate a decent, short header system and at the same time open up that muffler and see whats what. I want to try and take advantage of being able to rev to 9500rpm which is why I have shortened my trumpets and why i'm going to shorten my primaries, i'm hoping it will help give me more power at high rpms. I also feel the engine prefers a bit more advance than 20* but was being conservative for now. Once I have the tune perfect and the exhaust system done properly ill start adjusting the timing. Im fairly confident I can get quite a lot more power ( I reckon 210whp - 230whp isn't completely out of the question). Car is very quick already so im happy, just wanting to get the most out of my setup.
Last edited by EpitrochoidalPower!; 10-01-08 at 05:24 AM.
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