Someone had put a BMW V10 into a TVR Sagaris
Discussion
C5_Steve said:
Been following him a while on Instagram, he's pulled the engine already in preparation for sorting the bodywork. Hopefully it'll be back on the road in no time.
Same here plus discussions about what failures may have occured, issues with the build and improvements etc.Understeer occurs if you brake to hard or to late or turn in carrying too much speed and then again if you apply to much throttle when exiting a turn by pushing the front into understeer.
That’s all driver related not a powerful cars engine unless the set up is poor.
If indeed the V10 is only 26 kgs heavier it might work in the cars favour when it comes to understeer. You can quite easily corner weight the car and add ballast to correct any small changes of weight distribution.
It’s hardly a drastic action as just one large proportioned passenger will offset more weight by a long way lol
I had a moment once on track where I came onto runway hard on it in 3rd gear and the rear stepped out, I’d gone through that corner many times faultlessly but now had a passenger which I didn’t account for! It was Chilli wiz or Bacon Sarney as he’s known as now. He’s not over weight or large
Proper slide at about 80 mph but a massive wide run way at Marham so just rode it but he wasn’t impressed 
All I noticed was how much heavier and slower the car was with a passenger.
In his video he is unsure exactly what happened but has been aware there is a clunk on gear shifts and as the gearing is way to low geared the power will always be available with even very small throttle inputs. Couple that with abrupt gear changes through the gearbox there’s a possibility simply accelerating modestly on poor roads then add a split second dump of power as it upshifts could easily out weigh the rear grip as the Dif is clearly already loose. This usually results in one wheel spinning up and the difs slow to lock up and stop the spinning wheel.
His best bet it to check any given Dif works with a racing start on a flat road, if only one rubber line appears it’s not working.
The pre load is set low for road cars I was once informed which makes sense for longevity, that’s assuming your not doing race starts to often.
The same Dif used as a race Dif might be torqued up to twice what it is on the road going car.
He has identified various issues with the prop and Dif and is attempting to resolve it with what seems like great skill so good luck to the young man.
Is that really true the cars on a combination of missed matched and old rear tyres!
Add that to your list of factors lol.
Whats very impressive is how quick he is to get at it.
No point in sulking.
Good show indeed.
When it’s rebuilt I’d save myself some time and get Mat Smith to set it up and corner weight it.
Is the battery on the passenger side low down.
That’s already a racing trick used by Tvr to help offset the drivers weight and bring the pendulum closer to centre.
You could go the hole hog and set the car up with a bit of ballast to create a neutral car with driver weight included so when your in it the four corners tyre print is exactly the same or indeed off set if testing proves it works.
A simple way to add weight to say the left side of the car would be to raise the right side up a few mm which throws weight over to the left again offsetting the lump of weight the driver brings into the equation.
This can all be done in one day at a track with a flat floor, corner weights adjustable shocks and string and a good engineer/ driver,, Mat’s both those things and a fine man at boot.
He’d have a set up for it in no time.
Not many people bother with corner weighting because just bumbling along on roads you’d not notice any difference but if you want a car to dance on the edge of grip it’s vital.
A competitive race winning car from little MX5 onwards are all corner weighted regularly to have any chance of being predicable and offer the best grip.
Building a car like this needs that kind of set up attention to complete it. As others follow him is there any mention of set up work done on the suspension and geo side.
Really interesting car.
That’s all driver related not a powerful cars engine unless the set up is poor.
If indeed the V10 is only 26 kgs heavier it might work in the cars favour when it comes to understeer. You can quite easily corner weight the car and add ballast to correct any small changes of weight distribution.
It’s hardly a drastic action as just one large proportioned passenger will offset more weight by a long way lol
I had a moment once on track where I came onto runway hard on it in 3rd gear and the rear stepped out, I’d gone through that corner many times faultlessly but now had a passenger which I didn’t account for! It was Chilli wiz or Bacon Sarney as he’s known as now. He’s not over weight or large
Proper slide at about 80 mph but a massive wide run way at Marham so just rode it but he wasn’t impressed All I noticed was how much heavier and slower the car was with a passenger.
In his video he is unsure exactly what happened but has been aware there is a clunk on gear shifts and as the gearing is way to low geared the power will always be available with even very small throttle inputs. Couple that with abrupt gear changes through the gearbox there’s a possibility simply accelerating modestly on poor roads then add a split second dump of power as it upshifts could easily out weigh the rear grip as the Dif is clearly already loose. This usually results in one wheel spinning up and the difs slow to lock up and stop the spinning wheel.
His best bet it to check any given Dif works with a racing start on a flat road, if only one rubber line appears it’s not working.
The pre load is set low for road cars I was once informed which makes sense for longevity, that’s assuming your not doing race starts to often.
The same Dif used as a race Dif might be torqued up to twice what it is on the road going car.
He has identified various issues with the prop and Dif and is attempting to resolve it with what seems like great skill so good luck to the young man.
Is that really true the cars on a combination of missed matched and old rear tyres!
Add that to your list of factors lol.
Whats very impressive is how quick he is to get at it.
No point in sulking.
Good show indeed.
When it’s rebuilt I’d save myself some time and get Mat Smith to set it up and corner weight it.
Is the battery on the passenger side low down.
That’s already a racing trick used by Tvr to help offset the drivers weight and bring the pendulum closer to centre.
You could go the hole hog and set the car up with a bit of ballast to create a neutral car with driver weight included so when your in it the four corners tyre print is exactly the same or indeed off set if testing proves it works.
A simple way to add weight to say the left side of the car would be to raise the right side up a few mm which throws weight over to the left again offsetting the lump of weight the driver brings into the equation.
This can all be done in one day at a track with a flat floor, corner weights adjustable shocks and string and a good engineer/ driver,, Mat’s both those things and a fine man at boot.
He’d have a set up for it in no time.
Not many people bother with corner weighting because just bumbling along on roads you’d not notice any difference but if you want a car to dance on the edge of grip it’s vital.
A competitive race winning car from little MX5 onwards are all corner weighted regularly to have any chance of being predicable and offer the best grip.
Building a car like this needs that kind of set up attention to complete it. As others follow him is there any mention of set up work done on the suspension and geo side.
Really interesting car.
Edited by Classic Chim on Friday 26th January 11:00
Classic Chim said:
...
Is that really true the cars on a combination of missed matched and old rear tyres!
Add that to your list of factors lol.
...
Really interesting car.
Agreed, its a very interesting project and a very stoic approach to the prang.Is that really true the cars on a combination of missed matched and old rear tyres!
Add that to your list of factors lol.
...
Really interesting car.
Edited by Classic Chim on Friday 26th January 11:00
My comments about the tyres were from watching the video. Happy to be corrected if I'm wrong, but the tyre stamp appears to be 4212, which would indicate manufacturing in the 42nd week of 2012. Front tyres can also be seen to be different...
Sorry not great resolution from the screen grabs.
Jurgen Schmidt said:
Sounds a great idea, until you try to sell it at a later date. e.g. the Maserati Cerb that failed to sell at auction
What is a conventional Sag going for these days, £75k? This one will probably be worth half that
Wish I had the knowledge and experience that this requires though, it takes some bottle
It’s not a sagaris. It’s a tamora with modifications. What is a conventional Sag going for these days, £75k? This one will probably be worth half that
Wish I had the knowledge and experience that this requires though, it takes some bottle
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