793 replies to this topic

[Thealastair34]

 

I take it that when you run it up, you do so under load?

 

Yes, full throttle now in 4th gear with the datalogger running, turns out my  map sensor was playing up and we were making less boost than i thought, its more 4000rpm 7psi so very similar to my old rotrex, so im guessing the power under 4krpm will be lower than the rotrex and above that it will be more as I didnt use to make 10psi till 5500rpm and then used to drop boost above that on the rotrex(210bhp/190ftlbs)

 

Looking more closely at the comp/turbine wheel they seemed to be GT3076 sized which would explain the big threshold, my fault for not really thinking about this more before I bought it but I was only going to use it as a setup turbo so I could get the engine running and had no intention of keeping it long term, but also I just assumed that it would be laggy and running lower boost it would be like my rotrex, so i think dropping down a size of turbo will most likely be the best solution, maybe save it for road use so I dont wear out the other turbo and silverstone for the run down the back straight haha, as I can have loads of maps saved on my laptop and only takes a few seconds to upload a new one

 

 

 

regarding the turbo brace cosworths use a nice setup look at there for support

 

i run a 2871r with the larger housing and that see's full boost around 4,400rpm but i rev to 8.2k on my 1600

 

 

 

 

What engine is that based on, a rover k series or something else?

 

I looked at the cosworth braces, mine will be identical to them but instead of bolting to the rocker cover, mine will go over the inlet manifold as I dont want to risk stripping the bolts out of my rocker cover as ive lost one already this way.

 

I think ive found another turbo that I might get in the future, its a t34 sized turbo with all the correct rear housing ill need at a good price, but for the moment im having the suspension refurbed, atb diff and flywheel put in so that can be something to look at once I have run the engine up to 7000rpm so see what is actually happening.

 

 

ford 1600 sigma engine 

 

Ok well, I would imagine they will be flowing similar levels of air then, what boost do you run on that engine?

 

1 bar

[Nev]

Nice talking to you today Lee, and very good of you to give me that info on the uprights. Best of luck with your project, keep plugging away and hope to hear of your successes soon

[turbotoaster]

My aluminium header tank came today, just need to get a cap for it before I fit it, should help me get the water away from the red hot downpipe


also been having problems with my boost trace since i checked it out on the data logging, spoke to emerald today and they suggest running a filter in between might help calm it down as at the moment its just a wiggly line so i dont know how much boost im running.

Ive put some jubilee clips on after the picture was taken, will hopefully work so will see over the weekend

 

The work has started on the suspension refurbish, these pictures are from dan, up to yet hes been great to work with and recommend him, he is gracious even when I am adding to his work pile and coming up with more crazy ideas

once these are done we will move onto fitting the quaife diff and EP lightened flywheel.

Ive also worked out what we are doing with the clutch, speaking to Helix, there paddle rover 220 clutch will fit on my flywheel and hold up to 400ftlb! strangely its the same one that adrian newey ran on his turbod elise.

Pulled the wishbones out.....very crusty!


Hit them with the shot blaster


First coat of POR15


Also the ARB is getting done, all the suspension brackets and I assume the wishbone mounting points that go in the engine bay(ive forgot there name) also the roll bar braces are getting rubbed down POR15 and painted......least then ill have nothing left to go rusty again

Next we are going to fit spherical bearings to the lower wishbones so I can adjust my own roll centre to suit the car and i think im going get a Cornering Force rear ARB kit so that I dont have to run as hard a spring to help with my low speed mechanic grip and traction.

Then its a case of plumb in my bigger injectors and my chargecooler and get it on the dyno to see where we are at

 

Bit of an update,

rear clam off so the rollbar arms can be properly sorted out, when I first got it I just rubbed them down and spray painted them but to be fair it wasnt a great job, so they are being looked after properly with POR15 and paint, so it wont come back in the future to haunt me.


Also gearbox is now out, very mucky it is to


im looking forward to seeing it all clean and shiny, its just a shame the weather is so bad here, im always looking at MotoIQ articles and they are replacing parts on cars that are 10yrs old and the undersides look like new

Im also hoping as it all goes back together that the gear shift is much improved as it was shockingly bad before

 

Got a picture today from Dan of a super clean gearbox casing and that all my gears have been given a clean bill of health so thats great news.

Need to put new diff bearings in replace one of the gearbox seals as there was alot of muck coming out of one that got pinched last time.



Having my roll centre bearing holders made next week so im looking forward to seeing how that works out, should in theory give me more camber gain under bump so might mean I need to run less static camber depending on what the pirometer says

 

My front clam vents arrived today after waiting a month from singapore as that was the only place I could find a set of vents I was confident would properly vent the arches by allowing a low pressure zone at the exit(all others I looked at didnt seem the best aerodynamically or cost a daft amount of money.


Also my new injectors turned up, 470cc should cover for up to 330bhp at 3bar of pressure and they flow well up to 4.5bar to get me up to 390bhp should I ever take the engine that far which is very doubtful seeing how much trouble the guy from NZ had to get his hold together at that level

 

[turbotoaster]

All of the bolts, brackets and random bits get shot blasted and electro plated...


Then the box goes back together, clearances checked, new steel cage diff bearings installed and diff installed and checked for preload...

Then the lid goes on and the box looks better than new...


Gearbox mount also blasted and plated...

[FLD]

Top job!

Did you have the wishbones / roll bar braces plated before painting them too?

[turbotoaster]

they have been POR15 then painted over the top which should stop any corrosion from now on, quite a few people have done it instead

 

 

pulled the conrods out of there packet, seem to be everything they should be, checked the length and confirmed they were the new style ones, just need to sort out the ductile liners and pistons at the end of the month


nice rod bolts

[JohnTurbo]

This is always nice stuff to see.....and tedious stuff to do. props.

[fezzasus]

 

For someone who calls himself turbo toaster, I expected a better toaster

[siztenboots]

talkie toaster

[turbotoaster]

little update,

Got a full new set of ball joints and the EP rear caliper adapter to mount a pair of brand new AP 2 pots on the rear, going to order a set of 4 304mm discs with brake bias and larger master cylinder at the end of the month.......that should be all my braking sorted for the long term as the car is never going to be an endurance racer.

On a positive note changing all my brakes will save me about 8kg which is a nice saving as half of it is rotational

Im waiting on pro alloy to get back to me on what fuel pump will drop in there 48l tank, i think they said it was a walbro, but they are confirming it first.

Ordered some new faulkner springs, now the final weight of the car is targeted at 680kg, most of the weight has come from either in the middle of the car or in the rear and if anything ive added more weight to my front end than a factory elise so its sent my weight distribution further forward.

Im taking a guess at this, but with my front aero and bigger wheels/tyres I think my front end weighs about 300kg, where as my back will be about 380kg, this gives me a static weight distribution of 44/56 so in theory i would go for a similar distribution in the spring rates, but because the rear doesnt have an anti roll bar ive upped it a little to 41/59 which is 800lb/1150lb if i find im still getting rear roll i can always add a bit more up to 1250lb

Also got a couple of pictures from dan today......well i wanted them bright so I could easily check for damage/bent bits on track, look very funky




I think im going to paint my brake calipers the same colour, just need to takata green harnesses to finish the look

 

ball joints, rear caliper radial adapters and brand new 2 pots

 

wishbones all done, ball joints and Eliseshop spherical bearings fitted, getting there (y)



Upright bolts blasted and zinc'd

[Nev]

Loads of work going into it Lee, I wish lots of success. Any progress on the new uprights?

[JohnTurbo]

So will I be seeing this at Silverstone?

[turbotoaster]

Loads of work going into it Lee, I wish lots of success. Any progress on the new uprights?

 

Hit a bit of a stumbling block there, but ive come up with another solution and ive tested it with some geometry software and it seems to work, its commonly used on other race vehicles, always made me wonder why never on ours.

 

Will be running my car at 70/90mm setup on track and see if it plans out.....its a £200 setup, so if it works ill keep you updated

 

So will I be seeing this at Silverstone?

 

Im afraid not, ive ran out of time, it looks to be the car will be ready at the end of april and I need a couple of track days for testing so i missed the dead line by about a month, so im planning on doing a couple of OHW to get my eye in and then do a full season next year

[Exmantaa]

 

Loads of work going into it Lee, I wish lots of success. Any progress on the new uprights?

 

Hit a bit of a stumbling block there, but ive come up with another solution and ive tested it with some geometry software and it seems to work, its commonly used on other race vehicles, always made me wonder why never on ours.

 

Will be running my car at 70/90mm setup on track and see if it plans out.....its a £200 setup, so if it works ill keep you updated

 

 

 

Interesting. Any hint on what your solution is for the modified upright geometry?

[turbotoaster]

ill send you a u2u in a minute with the info

Edited by turbotoaster, 23 March 2014 - 12:35 PM.

[Goosenka]

ill send you a u2u in a minute with the info

This isn't Seloc you know

[turbotoaster]

haha, i thought i would get his opinion on it to confirm.

 

Here are a couple of pictures, they should explain what im doing, this is the rear of the car at 90mm ride height with 255/40/17

 

Before

After

 

Also got my new fuel tank yesterday.

 

Its a half width tank with foam core to help with surge. holds 19 litres plus the connecting pipes which is another 2 litres, it weighs 3.9kg with the connecting pipes, so a nice 6.6kg weight saving plus the fuel weight saved and less sloshing of fuel from side to side in the corners cant hurt in fast corner transitions

 

 

Also got my brake discs arriving next week, 304mm front and rear, using a bias valve and maybe a compound change to control the front/rear bias

 

 

[turbotoaster]

ive done some maths to see how much fuel i need to carry and come up with this calculation.

 

at 300bhp you need a peak flow of around 2000cc per minute, now you would assume that if you were accelerating constantly for that minute(repeating 40-140mph) you would average about 1800cc, if you are full throttle for 70% of the lap that means your using 1260cc per minute and an average lap in the uk should take 90secs, so 1890cc per lap, i should be able to run the tank as low as 4litres, giving me 17litres of fuel, or 9 laps of fuel, since time attack sessions are 10mins long that seems about right. if anyone can see something wrong with them calcs please let me know

[JohnTurbo]

Some things are best left to experiment.

 

 

[chris_uk]

ive done some maths to see how much fuel i need to carry and come up with this calculation.

 

at 300bhp you need a peak flow of around 2000cc per minute, now you would assume that if you were accelerating constantly for that minute(repeating 40-140mph) you would average about 1800cc, if you are full throttle for 70% of the lap that means your using 1260cc per minute and an average lap in the uk should take 90secs, so 1890cc per lap, i should be able to run the tank as low as 4litres, giving me 17litres of fuel, or 9 laps of fuel, since time attack sessions are 10mins long that seems about right. if anyone can see something wrong with them calcs please let me know

you need to look at the session length's.. some are longer than 10 mins..