BEC to F20C (S2000) conversion
Discussion
Hi all,
First post so be nice.
I'm embarking on the journey of converting my 7 from BEC to F20C power and am wondering if there is anybody else who has done such a thing.
So far I have stripped the bike engine out, removed the reverse box, props and radiator now I just have a big void where the new engine needs to go (f20c engine is on a pallet at the moment).
My biggest questions are about the Electrics. I biased towards a dta s60 pro ecu as it uses the stock sensors, I've been told to run a wide and lambda with this but I don't really know why ? I can't believe how much they want for a loom £500+ So I'm thinking of building one out of the STD engine loom instead.
The other problem I have is that my diff ratio is 3.64 at the moment which would give a theoretical top speed of 200 mph + I would like to change the CWP to a 4.1 but they go for £500 for a 7 inch sierra diff.
As soon as I start making some progress I'll start posting some pics up.
ATB Dan
First post so be nice.
I'm embarking on the journey of converting my 7 from BEC to F20C power and am wondering if there is anybody else who has done such a thing.
So far I have stripped the bike engine out, removed the reverse box, props and radiator now I just have a big void where the new engine needs to go (f20c engine is on a pallet at the moment).
My biggest questions are about the Electrics. I biased towards a dta s60 pro ecu as it uses the stock sensors, I've been told to run a wide and lambda with this but I don't really know why ? I can't believe how much they want for a loom £500+ So I'm thinking of building one out of the STD engine loom instead.
The other problem I have is that my diff ratio is 3.64 at the moment which would give a theoretical top speed of 200 mph + I would like to change the CWP to a 4.1 but they go for £500 for a 7 inch sierra diff.
As soon as I start making some progress I'll start posting some pics up.
ATB Dan
Wouldn't it been better to sell the bec and the money from that spend on a s2000 based kit there are a few on the market.
Other than that no really experience with s2000 engines but im aware that it will either need a dry sump arrangment or add a taller bonnent. Im sure somone will be able to offer more advice.
Other than that no really experience with s2000 engines but im aware that it will either need a dry sump arrangment or add a taller bonnent. Im sure somone will be able to offer more advice.
MG CHRIS said:
Wouldn't it been better to sell the bec and the money from that spend on a s2000 based kit there are a few on the market.
Other than that no really experience with s2000 engines but im aware that it will either need a dry sump arrangment or add a taller bonnent. Im sure somone will be able to offer more advice.
Have you seen the price on S2000 kits ? I built my car for 6k OTR, OK I fabricated a lot of bits myself and put a lot of hours in but the car is still of a really high standard. Westfield want 13k for their s2000 kit without the engine and box that's crazy money. I have picked up the engine and box cheap and intend to do the rest of the project on a reasonable budget, you can do it if you really try. Other than that no really experience with s2000 engines but im aware that it will either need a dry sump arrangment or add a taller bonnent. Im sure somone will be able to offer more advice.
First post for me too (after much lurking!)
I have a Dax Rush with an S2000 engine and box, running on DTA S60Pro. Running pretty much stock, standard sump etc. How much chopping and changing you'd need depends on what car you've got - I just needed a bonnet bulge to fit the engine in the Rush. Sump clearance is no worse than many other engines (as fitted in a Rush), and although you gain a little with dry-sumping, you don't gain a lot, as the bell-housing hangs pretty low as well.
Wiring up an after-market ECU is pretty straight-forward. They don't need that many wires to get them going. I stripped back the stock loom and used that. I did have a couple of issues with sensor polarity using the DTA - soon detected and fixed - and couldn't get the IACV to work, so am running without. I believe Emerald can also use the stock sensors.
Diff-wise, I went the expensive route of fitting a 4.1 CWP in the Sierra diff. In hindsight, a more common 3.92 would probably be close enough. I'm running standard S2000-sized tyres on the rear. If you run smaller tyres, you might be able to tune the gearing to be a bit closer to reasonable.
It seems to be a popular swap at the moment - as suggested, a quick sniff around Locostbuilders will throw up a few examples.
Good luck with the project!
I have a Dax Rush with an S2000 engine and box, running on DTA S60Pro. Running pretty much stock, standard sump etc. How much chopping and changing you'd need depends on what car you've got - I just needed a bonnet bulge to fit the engine in the Rush. Sump clearance is no worse than many other engines (as fitted in a Rush), and although you gain a little with dry-sumping, you don't gain a lot, as the bell-housing hangs pretty low as well.
Wiring up an after-market ECU is pretty straight-forward. They don't need that many wires to get them going. I stripped back the stock loom and used that. I did have a couple of issues with sensor polarity using the DTA - soon detected and fixed - and couldn't get the IACV to work, so am running without. I believe Emerald can also use the stock sensors.
Diff-wise, I went the expensive route of fitting a 4.1 CWP in the Sierra diff. In hindsight, a more common 3.92 would probably be close enough. I'm running standard S2000-sized tyres on the rear. If you run smaller tyres, you might be able to tune the gearing to be a bit closer to reasonable.
It seems to be a popular swap at the moment - as suggested, a quick sniff around Locostbuilders will throw up a few examples.
Good luck with the project!
On an S2000 I think the gearbox and bellhousing are just as low as the sump so there is nothing really to be gained by dry sumping it? My friend has put one in his Fury ( not a 7 granted ) and it manages "just" to fit under the standard Fury bonnet. I think it is quite tall for a 7 bonnet generally. I would speak to Westfield direct and see how they plumb / wire the S2000 in their chassis.
Furyblade_Lee said:
On an S2000 I think the gearbox and bellhousing are just as low as the sump so there is nothing really to be gained by dry sumping it? My friend has put one in his Fury ( not a 7 granted ) and it manages "just" to fit under the standard Fury bonnet. I think it is quite tall for a 7 bonnet generally. I would speak to Westfield direct and see how they plumb / wire the S2000 in their chassis.
Do you really think Westfield will give up that information ? It would be nice if they did. I'm guessing they use a custom loom and either DTA or Emerald management as they use the standard sensors. Your correct about the bottom of the gearbox being level with the sump, Im just going to fit a baffle to the sump tray and fit a guard.Cheers Dan
PeteS2k said:
First post for me too (after much lurking!)
I have a Dax Rush with an S2000 engine and box, running on DTA S60Pro. Running pretty much stock, standard sump etc. How much chopping and changing you'd need depends on what car you've got - I just needed a bonnet bulge to fit the engine in the Rush. Sump clearance is no worse than many other engines (as fitted in a Rush), and although you gain a little with dry-sumping, you don't gain a lot, as the bell-housing hangs pretty low as well.
Wiring up an after-market ECU is pretty straight-forward. They don't need that many wires to get them going. I stripped back the stock loom and used that. I did have a couple of issues with sensor polarity using the DTA - soon detected and fixed - and couldn't get the IACV to work, so am running without. I believe Emerald can also use the stock sensors.
Diff-wise, I went the expensive route of fitting a 4.1 CWP in the Sierra diff. In hindsight, a more common 3.92 would probably be close enough. I'm running standard S2000-sized tyres on the rear. If you run smaller tyres, you might be able to tune the gearing to be a bit closer to reasonable.
It seems to be a popular swap at the moment - as suggested, a quick sniff around Locostbuilders will throw up a few examples.
Good luck with the project!
Hi Pete,I have a Dax Rush with an S2000 engine and box, running on DTA S60Pro. Running pretty much stock, standard sump etc. How much chopping and changing you'd need depends on what car you've got - I just needed a bonnet bulge to fit the engine in the Rush. Sump clearance is no worse than many other engines (as fitted in a Rush), and although you gain a little with dry-sumping, you don't gain a lot, as the bell-housing hangs pretty low as well.
Wiring up an after-market ECU is pretty straight-forward. They don't need that many wires to get them going. I stripped back the stock loom and used that. I did have a couple of issues with sensor polarity using the DTA - soon detected and fixed - and couldn't get the IACV to work, so am running without. I believe Emerald can also use the stock sensors.
Diff-wise, I went the expensive route of fitting a 4.1 CWP in the Sierra diff. In hindsight, a more common 3.92 would probably be close enough. I'm running standard S2000-sized tyres on the rear. If you run smaller tyres, you might be able to tune the gearing to be a bit closer to reasonable.
It seems to be a popular swap at the moment - as suggested, a quick sniff around Locostbuilders will throw up a few examples.
Good luck with the project!
Did you use any sort of drawing to create your loom, I've got a pretty good idea waht needs to be done though. I cant believe how much DTA want for one they quoted £549, thats almost half of what i paid for the engine !
No drawing as such... just the wiring diagrams from the S2000 workshop manual (downloadable from the internet if you haven't got it already... it's big!), the DTA wiring diagram, and then just stripped off all the conduit from the loom to follow the existing wires. A proper birds-nest was the result, but everything's pretty logical really. £549 is rather excessive, as long as you can manage a bit of soldering / crimping to join the bits up. I paid someone off the DTA forum to make up the ECU plugs with tails, as I couldn't master neatly crimping the tiny pins without the proper tool.
What car are you doing the transplant on?
What car are you doing the transplant on?
PeteS2k said:
No drawing as such... just the wiring diagrams from the S2000 workshop manual (downloadable from the internet if you haven't got it already... it's big!), the DTA wiring diagram, and then just stripped off all the conduit from the loom to follow the existing wires. A proper birds-nest was the result, but everything's pretty logical really. £549 is rather excessive, as long as you can manage a bit of soldering / crimping to join the bits up. I paid someone off the DTA forum to make up the ECU plugs with tails, as I couldn't master neatly crimping the tiny pins without the proper tool.
What car are you doing the transplant on?
Hi again Pete.What car are you doing the transplant on?
The engine is going into a Haynes Based chassis, altough this one has an inboard front and different wishbones all round. The install has already been done, the only real mod to the engine is relocating the oil filter to get it away from the steering linkage. I know people have chopped chunks out of the gearbox casing to get it further back but im going to avoid doing this if possible. Im starting to be swayed toward Emerald management- predominantly as its the cheapest and theres a local reccomended rolling road.
Cheers Dan
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