johns tvr rebuild part two
Discussion
In the end i have just gone through the box again rebuilt the remote mechanisum and replaced it more or less as it was there seems to be no major upgrades for the lt77 it already is the later suffice with the better pump and wider gears etc. so not a lot can be done will have to se how it goes.
John
John
Hi John
Does your speedo work correctly? I changed mine out for one from EBT gauges and doesn't work, it's something I've just not got round to diagnosing yet but I'm wondering if you just did a straight swap over or if the wiring/signal/sender needed any modification to work. Did you keep the original sender and just swap gauges over?
Does your speedo work correctly? I changed mine out for one from EBT gauges and doesn't work, it's something I've just not got round to diagnosing yet but I'm wondering if you just did a straight swap over or if the wiring/signal/sender needed any modification to work. Did you keep the original sender and just swap gauges over?
No the dash has its own sensor which if you look back in the thread you will see how i got round the fitting of said sensor it also has a gps aerial for lap timing etc. both require wires run from location of aerial/sensor to the dash,and it is now very accurate as it is infinately adjustable insomuch as the number of pulses per mile can be set by increments of one.
John
John
sorry for the late report i took the car to emerald and john and i have got what we think is the best map for this particular engine, it is very very smooth loads of low end torque with the boost building smoothly all the way to 10.6 flat-out the graph with two lines is the old graph running the 95mm blower wheel and 240cc injectors at 3.1 bar fuelling the solid line is the new output figures and is just right getting a little bit rich at the top end to keep things under control heat and detonation wise the only alteration i have made is to turn of the 0 fuelling on lift of and added a little fuel above 2500rpm to stop popping and banging other than that all good for an old pre seep 4.0ltr
john
john
made and fitted a splitter today its a variation on the gutter theme ,i actually used some 4in drain pipe slightly stiffer i was concerned guttering would deform with the wind pressure the blade is held by a shaped piece of galvanised plate 1,5mm which is in turn held by five 6mm set screws up into rivnuts the blade itself is slotted so should it foul on whatever it can slide from under the plate hopefully causing no body damage,
john
john
Well daz thats a mute point but any wind deflecting type devices are normally shaped this way reference a rear wing etc. but frankly i dont think in the splitter instance it makes much difference as it will create a low pressure area behind the splitter whatever and this way round is less likely to create damage should it be caught.
John
John
I'd like to understand just how a splitter works. John, when you say it creates low pressure behind it, is that to draw air down through the engine bay and also pull the car downwards (down force)?
My take on this is that x amount of airflow goes under the nose, a splitter ruffles it up and so creates drag (lower pressure), but where's the trade-off? It's still x amount of air passing under IYSWIM.
My take on this is that x amount of airflow goes under the nose, a splitter ruffles it up and so creates drag (lower pressure), but where's the trade-off? It's still x amount of air passing under IYSWIM.
Hi John, I'm no expert but believe Daz has a point.
I think it has to face forwards which does create a small amount of drag on acceleration but altering air pressure thus drawing air out of the engine bay, cooling and preventing bonnet lift.
I think at high speed you will gain to much front end lift, making the car unstable.
Here's a couple of previous threads I found, complete with forward and rear facing debates
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
I fancy fitting one myself, but I am also concerned about grounding and ripping it off, I've already cracked my number plate which sit's lower on mine to help with cooling.
I think it has to face forwards which does create a small amount of drag on acceleration but altering air pressure thus drawing air out of the engine bay, cooling and preventing bonnet lift.
I think at high speed you will gain to much front end lift, making the car unstable.
Here's a couple of previous threads I found, complete with forward and rear facing debates
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
I fancy fitting one myself, but I am also concerned about grounding and ripping it off, I've already cracked my number plate which sit's lower on mine to help with cooling.
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