Fiesta ST MK7.5 Track car

Fiesta ST MK7.5 Track car

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Discussion

Kaveney

Original Poster:

1,332 posts

159 months

Wednesday 30th June 2021
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After a planed start date of March to put the car back on track i have finally got round to booking my first track day of the year at Goodwood on the 06/08/21 .





As every track day seems to be booked up months in advanced i had to grab this one as i was also looking to do Llandow in July but i was too late and its all booked up .


All i need to do now is get all the other bits done on the car , get it mapped , MOT , Brakes etc so should be fun with a deadline to meet and a car that is still in bits in the garage smile

Rob-c33sg

139 posts

58 months

Wednesday 30th June 2021
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Goodwood is a great track went there recently and really enjoyed it smile

WCZ

10,590 posts

196 months

Wednesday 30th June 2021
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any more weightloss planned? cf bonnet must save a bit?

Kaveney

Original Poster:

1,332 posts

159 months

Wednesday 30th June 2021
quotequote all
I was there last November but that was in the pouring rain so it will be nice if it is a dry day / track .

Rob-c33sg said:
Goodwood is a great track went there recently and really enjoyed it smile

Kaveney

Original Poster:

1,332 posts

159 months

Wednesday 30th June 2021
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Yes a fair bit and you must have read my mind on the CF bonnet as i have one on order but it is taking a long time to arrive .


WCZ said:
any more weightloss planned? cf bonnet must save a bit?

alex98uk

247 posts

75 months

Wednesday 30th June 2021
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How about aftermarket (e.g. Airtec) or ported manifold (e.g. Vudu)?

People seem to be getting decent gains with those and an aftermarket turbo. Apparently assist with spool times (though I have no idea of the physics behind this!).

Kaveney

Original Poster:

1,332 posts

159 months

Thursday 1st July 2021
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Having reviewed logs from a non-ported and ported s280 turbo setup the main benefit is it lowers EGT’s a touch but not much .

Looking more in to this it seems there is no point in opening the exhaust ports out bigger on the manifold as the ports in the heads are only 29 to 30mm wide so you would want it to match .

There is the simpson exhaust manifold but that is mega money and needs a lot of reworking of the engine bay to fit so i think i will pass on this .


alex98uk said:
How about aftermarket (e.g. Airtec) or ported manifold (e.g. Vudu)?

People seem to be getting decent gains with those and an aftermarket turbo. Apparently assist with spool times (though I have no idea of the physics behind this!).

Kaveney

Original Poster:

1,332 posts

159 months

Friday 2nd July 2021
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And yet another update and this time keeping with the engine upgrades i have changed the induction system cross over pipe .



The new CB designs cross over pipe is a front mounted unit that has been wrapped in reflective DEI heat tape .



CB designs cross over pipe







And some new Orange Pro hoses .







The Ram Air cross over pipe i was using is located at the rear of the engine bay above the very hot exhaust manifold , cat and turbo so when they get hot the heat rises and heats the crossover pipe causing higher intake temps .



This is the stock cross over pipes location path in red .















The CB design kits redirect the crossover pipe away from the heat at the rear of the engine and insted goes across the front where the temperatures are much more cooler keeping the intake temperatures down .



CB designs front cross over pipe installed .























The kit has been proven to lower intake temperatures due to the relocation of the induction pipework and it will be good to see what the inlet temps reduce to with this new setup .



Kaveney

Original Poster:

1,332 posts

159 months

Friday 9th July 2021
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So with some engine work done over the last couple of weeks it was back to some more weight saving for the car .



looking at what other bits could be changed / removed I started looking at the rear quarter windows as they are just a fixed unit and do not have any function on the car and as there is only a roll cage where the back seats use to be this looked like a good part to change out .



I placed an order from AWC motor sport plastics for some thermoformed rear quarter windows in a 4mm thickness and a light grey finish with black border .







Then it was on to removing the window and after trying a few tools I was not getting anywhere so just resorted to blunt force smile







Then it was on to cleaning up the window frame and getting all of the stock sealant removed .







One side of the OEM glass rear quarter window comes in at 5.1 Kg .







One side of the AWC thermoformed rear quarter window comes in at 1 Kg .







Then to add the Sikaflex 291I bond to the window and frame .







Then to bond the AWC thermoformed rear quarter window to the frame .







And all installed .















I still need to tidy up some of the sealant overfill but they are in and nice and solid and do not leek .



The two AWC rear quarter windows save a nice 8.2 Kg over the stock glass OEM units so this brings the total weight removed from the car to 89.7 Kg so far .

alex98uk

247 posts

75 months

Sunday 11th July 2021
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You had an opportunity to see whether they are much louder? Seems like quite an extreme change for an OEM+ track car!

By the way, have you ever looked at this:

https://www.aetmotorsport.com/products/ford-fiesta...

Not sure if it's snake oil or addressing a genuine issue. Seems to be specifically designed for track cars where alignment is more important.

Kaveney

Original Poster:

1,332 posts

159 months

Monday 12th July 2021
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You are correct in that i am pushing the OEM+ track car title a little close to the edge but i do not think that this will make the car much louder vs the OEM Ford glass rear windows .


Good spot on this one and i have not seen the VUDU Alignment Kit below before so might take a look in to this as i did have the sub frame off the car last year before all the Geo settings were done so could see how this would be useful .


alex98uk said:
You had an opportunity to see whether they are much louder? Seems like quite an extreme change for an OEM+ track car!

By the way, have you ever looked at this:

https://www.aetmotorsport.com/products/ford-fiesta...

Not sure if it's snake oil or addressing a genuine issue. Seems to be specifically designed for track cars where alignment is more important.

J4CKO

41,853 posts

202 months

Tuesday 13th July 2021
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Quick question Alan if I may, have you changed your final drive at all ? Cant remember, so many pages, so many mods.

I asked this on the Fiesta ST Group on FB but a lot didn't get that comparing their thoughts about their standard car didn't quite apply the same to a modified example with a different turbocharger and markedly different power delivery, some stating that my opinion was daft and the car needs longer gear ratios, not shorter. So decided to canvas the opinion of the font of ST knowledge smile

I have a slight feeling that mine is slightly over-geared, in that it does like 65 in second and well over 90 in third, not sure of the actual numbers but its definitely faster gear for gear with the best part of another 1500 rpm available. Which means I only use second and third a lot of the time when pressing on and it feels like fourth should be brought into play more often.

I know Pumaspeed and whoosh sell a lower final drive and the ST200 edition came with one 15% lower than the normal model.

Not going to do it at the moment, might be an acclimatisation thing and its not a massive problem, just a feeling that it could do with the gearing adjusting down a smidge, somewhere between where it is now and the in gear speeds a stock car manages.


Kaveney

Original Poster:

1,332 posts

159 months

Tuesday 13th July 2021
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Hi there J4CKO no I have not done this yet but have done many hours researching and reading up on this and it is on my list of things for next year .

I dont think there is a a right or wrong answer to this one as the stock gearbox is fine for stock power and turned cars running much more power than stock but I would agree that the ratios are a tad long but nothing too bad .

For a road car the stock box may be the best of both worlds as you will still have the spread of torque and power to help out on the longer gearing but still be getting better mpg than if you were running ther shorter final drive .

I can see this being very helpful for track driving and if you are not that bothered about mpg or sitting at higher revs on the motorway as the shorter gearing will improve acceleration and on most tracks you will not get near the top speed that will be lower with the shorter gearing .

One word of caution with regards to just fitting the lower final drive is that it is not an easy job and ever ford specialists say it is a tricky thing to change out / get right .

I will be looking to do this next year as I think it will be a very good upgrade to the car but I would say that finding a st 200 gear box will br much easier than trying to swap out the final drive .





J4CKO said:
Quick question Alan if I may, have you changed your final drive at all ? Cant remember, so many pages, so many mods.

I asked this on the Fiesta ST Group on FB but a lot didn't get that comparing their thoughts about their standard car didn't quite apply the same to a modified example with a different turbocharger and markedly different power delivery, some stating that my opinion was daft and the car needs longer gear ratios, not shorter. So decided to canvas the opinion of the font of ST knowledge smile

I have a slight feeling that mine is slightly over-geared, in that it does like 65 in second and well over 90 in third, not sure of the actual numbers but its definitely faster gear for gear with the best part of another 1500 rpm available. Which means I only use second and third a lot of the time when pressing on and it feels like fourth should be brought into play more often.

I know Pumaspeed and whoosh sell a lower final drive and the ST200 edition came with one 15% lower than the normal model.

Not going to do it at the moment, might be an acclimatisation thing and its not a massive problem, just a feeling that it could do with the gearing adjusting down a smidge, somewhere between where it is now and the in gear speeds a stock car manages.

J4CKO

41,853 posts

202 months

Tuesday 13th July 2021
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Cheers Alan, makes sense, no plans to do it was just wondering what your thoughts were on the subject seeing as it was one of the things I had discovered and not expected.

Loving it though, wife sits there wincing when she goes in it though biggrin

Edit, tried earlier, in third it showed an indicated 100, er, kmh...

Edited by J4CKO on Wednesday 14th July 19:20

Kaveney

Original Poster:

1,332 posts

159 months

Thursday 15th July 2021
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another update and a bit more weight saving again .



I was looking to see what other parts could be removed to save a bit more weight and have removed the rear wiper motor set up from the car as I rarely use this .



The complete rear wiper and motor assembly comes in at 2.4 Kg .







The only problem with removing the wiper assembly that it leaves a hole in the upper hatch trim panel .







One option is to just use a rubber bung but this looks a bit messy so I have ordered a wiper delete blank in the same Sprite Blue colour of the car .







The install is very easy and it give a nice OEM finish and is water tight .















And all installed .





Kaveney

Original Poster:

1,332 posts

159 months

Friday 16th July 2021
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The second part of removing the rear wiper motor was to removed to rear OEM glass screen and change this out for a AWC thermoformed rear window in a 4mm thickness and a light grey finish to match the AWC side windows .



Again it was down to blunt force to remove the window .















The rear heated screen comes in at 9.5 Kg .







AWC thermoformed 4mm rear window .











The AWC rear window comes in at 1.35 Kg .







And then it was just to fit the the rear screen the same way as the side windows using Sikaflex 291I to bond to the window and frame .











And all installed and checked for any leeks .











Again i still need to tidy up a bit of sealant overfill but they are in and nice and solid .



The AWC window saves 8.1 Kg over the OEM window so another nice amount taken out of the car .


MDifficult

2,095 posts

187 months

Friday 16th July 2021
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This continues to be amazing - absolutely dedication to the cause.

You need to keep it in the garage though - stop it floating away wink

Kaveney

Original Poster:

1,332 posts

159 months

Saturday 17th July 2021
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Thanks and I do enjoy working / upgrading on the car maby more than driving it smile

I realy want to get the car to 300 BHP per tone and a kerb weight down to around 1100 Kg so still need to find a bit more weight to remove but still keep things sensible so it is a tricky balance but an enjoyable one .



MDifficult said:
This continues to be amazing - absolutely dedication to the cause.

You need to keep it in the garage though - stop it floating away wink

alex98uk

247 posts

75 months

Saturday 17th July 2021
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Can you get a carbon bonnet/roof? Would remove some weight, but also bring the centre of mass down

ApOrbital

10,027 posts

120 months

Saturday 17th July 2021
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Oh what a nice car and a good read up thanks for this.