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v8GTmac1

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Everything posted by v8GTmac1

  1. I have done a great deal of searching and I finally struck gold with this gentlemen that appears to be Canadian. There you will find as you scroll down, all the dimensions you need. Dont miss the part where the flywheel sits 25.1mm in the engine block which you will have to make up for. Especially if you are using the Subby flywheel re-drilled that means 25.1mm adapter plate plus whatever your 907 crank mating surface comes out past the bellhousing mating surface. Let me know how it goes! http://electric-wrx.epizy.com/adapter.html?i=1
  2. You got 34mph out of your v8 esprit?????  I have managed to get 20mpg averaging 80 mph. Yikes, 

    Anyways I like what you are doing with the 918 into the Excel And i'm curious what method you used to make the adapter plate?

    1. dave excell

      dave excell

      Hi.

      I measures the Toyota W58 bell housing and it was longer than the V8 bell housing by 26mm. So I am using the V8 housing with a 26mm alloy spacer. I aligned the Toyota geabox input shaft with the hole on the V8 bellhousing using a shaft that fitted V8 on one end and Toyota at the other. The  alloy plate was counterbored with the holes to fit the toyota box so they were slightly below the surface. This then left the plate clear to drill through holes to bolt the V8 housing on. There was a clash of one bolt on the V8 bell housing , so another was redrilled off set enough to miss. You would need a lathe to make the shaft up or a friendly machine shop owner. The spigot bearing in the V8 crank is swapped for the Excel one (same outer diameter but bigger inner) The two slide togrther perfectly. next job is to make the clutch friction plates with toyota splines instead of the AP clutch Reault splines. Apologies if this is not clear I am not very good at describing things. The geabox needs to be perfectly in line with the crank to avoid any reliability problems.

      The tip I got about the V8 economy was from Phil at South West Lotus. He said keep the speed under 100mph and boost low and 30 mpg is acheivable. I normally get about 24 mpg from the Esprit using it locally. My Excel 2.2 does about the same with those dellorto carbs. Anns M100 does about 35 mpg on a run. All 3 cars have done the Monaco, Italy run and the Excel is the most uneconomical of all.

  3. Everybody needs an obd2 code reader. It will give you trouble codes if the computer can see something wrong. In some model readers you will even get RPm signal reading which rules out the ckp and cam sensors. But you can skip this by checking for spark. Spark will tell you the ecu is reading RPM correctly. You can actually pull out a coil wire off the spark plug and listen to the sparks jump during cranking provides there is not much ambient noise. Not too far off the plug that the spark won’t jump and instead hit a different ground point. This method could be aided by using a stethoscope to listen closely. Timing light method is safer overall.
  4. Good idea on finding bike friendly routes. This road wasn’t picked out by accident lol. The wife was all for it when she saw how twisty it was. It’s just too bad I don’t have any GoPro type camera.
  5. We are taking 4 days off to go to Cali and doing a run up for a nice hike. Anyone familiar with the roads can tell me a better way ? it starts on Yerba Buena rd Up to Mishe Mokwa where we can find various trailheads. I would take
  6. Seems I found the proper thread for this
  7. i dealt with this low-fuel relay yesterday. traced the issue from the sender to the light and found there was this doohickey under the hood. Took it out and sure enough keeping the light on. It was the craziest coincidence that I was re-calibrating my fuel gauge needle to then have this happen? I was so confused. I opened it, re-soldered everything and working good now. I was about to put the jumper wire but it's now good. you did great work here, you mind doing one for the factory ECU?
  8. That explains what’s happening there. Does it add up rhatvthe poay is only on that cylinder? good job on the pulley, learned something new.
  9. Haha it’s funny you ask because I want to do the exact same thing although you posted here 2 years ago May factory ecu might be dead in some form I don’t know till I spend some time on it. I purchased a JimStim from diyautotune in order to simulate many different combinations of ckp and cam signals. It’s a 4 spike VR sensor on the crank & a single Hall effect pulse from the Cam all I can tell you is that it has a 27 degree trigger angle as measured by my tuning software but idk if that’s btdc,atdc
  10. To anyone still looking for answers, in cases like this when you are dealing with a component borrowed from an American GM product. You need to google like I did, any early 90s Pontiac and I found specific info here https://www.firebirdnation.com/forums/topic/512689-air-bag-light-flashed-again-tonight/ Its 2.2 ohms on the airbag which you should NOT be checking with a ohmmeter!!!! If you already did and survived that, then great. Well now you know why the repair manual posted by mike has you checking for voltage instead. Thats why there is a dummy load tester tool, it’s a known good expensive 2.2 ohm resistor Gimmick which you can just buy any 2.2 ohm resistor as a dummy load and put it in place of the airbag. I keep some in my tool box because that value seem pretty standard in the industry. There is no actual resistor in the airbag, just an initiator wire that measured out to that. Hope this helps.
  11. After thinking about this and it makes me really want to buy a borescope to stick down my bores and see how my Self-tuning has made my cylinders looks. Too much fueling from my initial startup tune together with an accidental water syphoning from water/meth tank in the very beginning has had me wonder. Then theres the fact I dont use the Knock sensor or the factory "rough road" sensor mounted on chassis to eliminate possible detonation, I rely simply on taking baby steps in the tuning. Question, are you using knock sensor on your tuning computer?
  12. you guys from England have the most interesting stories of where you source your parts😆 It's becoming a dream of mine to go and visit some of you😂 so the Shop found no out of round of the cylinders and so far the pistons have not been pulled out. It will interesting to see what the cylinder liners look like on the outside as well as the pistons and rings. So you will have them re-balance with new rings and verify the piston wrist pin holes have no abnormal wear, meaning the pistons where not slapping around?
  13. whats the story on your engine? Was it burning oil? How many miles on it and has it ever been disassembled ?
  14. learning something new! Do you also grease them up upon install?
  15. The bearings are a generic size and there are plenty of options out there to choose. single and double row, not to mention where they are made and When they were made. Truth be told, I didnt take that into account as I picked up exact model bearings as the factory from a person on ebay and they were OLD packaging. Next time around I will get some super nice double row bearings. It's said you have to replace all the pulleys on every timing belt job, so for the smaller idler pulleys i didnt see a need for alternatives, just rebuilt them with exact quality bearing which I picked up from a Ford Taurus SHO website (serpentine belt tensioner bearing)
  16. New datalog, I gained exactly 2 psi of boost without changing anything to the tune. that 2 psi got me into overboost protection and had a little misfire😆
  17. The tips came from somebody in the UK. Love the new look. The race cars are what most people already have and the honeycomb is about 50% more flow from a VisiCalc standpoint. I will do a new video and datalog boost without changing anything on my tune and see how much more boost I get.
  18. I only tried to order the top ring from Total Seal but the sales person was unmotivating when I mentioned Lotus. I kept all the same rings and never removed them. If you engine technically still runs and idles normal then A simple compression check should put you at ease.
  19. new rod and mains Yes from Jaeparts, idk where you are located but these guys are in California. Pistons did not have any damage and the rings looked good up close visually I guess you have to look at them up really close and look for pitting. I did do all the work myself and purchased this exact ball flex hone. I tried to buy rings for the top but they had to be custom made. Just re-used them with 42k miles on them. BUt keep in mind when doing all that work, you have to press out the cylinder liners and reseal them. I ordered the tool from a UK Lotus vendor, then I ordered the liner sealant from JaeParts. It took me 1.5 years from start to finish. Parts sourcing, machine shop re-work of the crank and head surface, and buying tools I didnt have. It was a lot of work for which I was quoted $25k in California.
  20. here you go, Yes this was after the Pick up tube broke. Your numbers will be at a different scale due to elevation differences where we live, but you get the idea. 5 Revolutions for each to measure the actual balance between cylinders and then full compression from each. DO this on a fully charged battery with all the plugs out and Main fuel pump relay out and WOT. and here is a poor picture of the repaired tube, mounted to a 1/8" alloy plate during the repair. There was mulitiple repairs made, maybe you can see the weld line on the near the 2 bolt flange, that is an added 2" section of pipe, I also bought 2 new tube stands with new bolts From here Steel tubes Truth be told, In order for me to repair this mangled mess, after mounting the new tubes and new section of pipe was acquired, I had to mount it all while on the engine stand, add layers of cardboard,cloth,plastic bags to keep debree from entering the block, and tack weld it all in place. THen have it finish welded with a TIG.
  21. I do have them. But on a short vacation currently. I did a mild blueprint of the engine writing down as much as I could measure. I’ll get back to you end of the week.
  22. The above kit with the Lotus that got away https://bringatrailer.com/listing/2002-lotus-twin-turbo-esprit-25th-anniversary/ I remember watching this listing back in 2016 thinking to myself, "I wish I knew how to tune a Lotus" 😒 Built motor,INtercooler setup, AEM piggy back, low miles and a 2002 !!! What a bummer.
  23. I opted for the stock re-assembly of my 918 when I rebuilt it. re-used the pistions and liners, even reused the piston rings along with oil pump. Only replaced main/rod bearings, I honed the cylinders with a 280grit ball hone and they came out beautifully. My compression numbers where erratic before the rebuild but after the rebuild, on a cold UN-started engine I was already back to normal balanced compression numbers. withing 5psi of each other. I was ultimately more concerned with oil pressures, oil clearances, clean oil passages throughout the entire engine, every oil galley was uncovered and flushed out. Ran new oil cooler lines and oil cooler, twin oil filters and uncovered the baffles on the valve covers to clean out the crud that you cannot see. I somehow ended up with higher then normal oil pressure with a VDO mechanical oil pressure gauge. But I also hand polished my camshaft journals .
  24. i'm sure that Motec has no trouble tuning everything and anything, maybe even does it's only auto tuning/learning on it's on while you drive. On MS you have to have the laptop running for autotune to do it's thing. Did you manage to fit an aftermarket FPR ? Snowrx, I think the original EFI Tech company who provided the ECU found it easier to tune with smaller injectors and higher PW for a stable idle rather then the other way around. I know that is a known fact.
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