Discussion
Just pondering what the VERY high speed behaviour of a Griff is like? I've had over 160mph on the clock myself and the car felt as solid as a rock to be fair. I have read of Jaguar testing one in a wind tunnel and getting 0.32cd for drag which is pretty respectable but wondered at what speed the front end would lift and how you would achieve higher speeds of circa 180-190mph!! 
From the previous Griffs and Chim I have owned I have learnt that a good set up is everything regarding high speed stability and the rake in particular plays an important part, but assuming the set up is at it's best,could very high speeds still be safely accomplished or have they been done already perhaps as there are quite a few griffs running enough BHP already?
From the previous Griffs and Chim I have owned I have learnt that a good set up is everything regarding high speed stability and the rake in particular plays an important part, but assuming the set up is at it's best,could very high speeds still be safely accomplished or have they been done already perhaps as there are quite a few griffs running enough BHP already?
Edited by The AJP Griff on Saturday 28th April 11:31
I'm sure the only way mine would achieve 180-190mph is if I drove it off a cliff.
Which, before the chimpchumps start, I have no intention of doing.
But it does feel like I'm doing 200+ when I get above the ton because everything seems to be rattling and moving like - bonnet, wing mirrors, wipers etc all doing their own mad dance.
When looking under the carpets for the factory signatures I half expect to find 'Coco The Clown' painted somewhere
Which, before the chimpchumps start, I have no intention of doing.
But it does feel like I'm doing 200+ when I get above the ton because everything seems to be rattling and moving like - bonnet, wing mirrors, wipers etc all doing their own mad dance.
When looking under the carpets for the factory signatures I half expect to find 'Coco The Clown' painted somewhere
Pondered this when i dropped the LS3 in! And after driving the car for the first 1000 miles i'm very pleased with stability!
I'm running larger wheel and tyres all round and have played with the rake, which as you stated has a big effect on top end stability.
The biggest change was noticed when i fitted the tuscan style splitter's which now feel like they pin the car to the road at anything over a Ton
I do believe the arse shape of the Griff does create lift at high speed, but a rear sc power diffuser was just one cosmetic step to far when
it comes to one of the best rear ends around, plus it would mean switching to single exit exhaust as seen on Andy Race is old Griff and a few other!
With the new motor i have seen silly speeds on the speedo [on private roads of course] and car has felt more stable than my 350c which is well sorted so well chuffed!
High end speed is not where its at for the Griff though as i can testify at silly speeds even with the roof on the assault on your senses is monumental! with massive levels of concentration needed.
As far as i know Brummie is the only one on here who could testify what a road going TVR feels like at over 200mph, from the in car footage it looks brutal.
On the other hand @ the risk of sounding like a flash git If you like top end speed i can highly recommend Mercs AMG CL55 derestricted, it drives @ 190 like your doing 90 whilst massaging your back behind double glazed windows! effortless. These cars can now be picked up for less than a 4lt chim, running cost's are a bit higher though unless its your chim Peter!
I know you can't keep out the Griff forum!
I'm running larger wheel and tyres all round and have played with the rake, which as you stated has a big effect on top end stability.
The biggest change was noticed when i fitted the tuscan style splitter's which now feel like they pin the car to the road at anything over a Ton
I do believe the arse shape of the Griff does create lift at high speed, but a rear sc power diffuser was just one cosmetic step to far when
it comes to one of the best rear ends around, plus it would mean switching to single exit exhaust as seen on Andy Race is old Griff and a few other!
With the new motor i have seen silly speeds on the speedo [on private roads of course] and car has felt more stable than my 350c which is well sorted so well chuffed!
High end speed is not where its at for the Griff though as i can testify at silly speeds even with the roof on the assault on your senses is monumental! with massive levels of concentration needed.
As far as i know Brummie is the only one on here who could testify what a road going TVR feels like at over 200mph, from the in car footage it looks brutal.
On the other hand @ the risk of sounding like a flash git If you like top end speed i can highly recommend Mercs AMG CL55 derestricted, it drives @ 190 like your doing 90 whilst massaging your back behind double glazed windows! effortless. These cars can now be picked up for less than a 4lt chim, running cost's are a bit higher though unless its your chim Peter!
I know you can't keep out the Griff forum! Edited by 7 TVR on Saturday 28th April 14:24
I've pulled 6300 rpm in top on the 4.3BV I had. I tucked it right next to the high concrete central reservation to try and reduce the risk of wind changes and to hit it early if anything went wrong rather than spearing across into it. The car was on Ohlins and felt fine.
However, on another previous occasion I had been travelling at around 120 up an incline towards the French coast and there was a drumming feeling from the front. In essence the front of the car was lifting up very badly.
If I were inclined to do those speeds again I would look to add something discrete that would pull the nose down at speed.
However, on another previous occasion I had been travelling at around 120 up an incline towards the French coast and there was a drumming feeling from the front. In essence the front of the car was lifting up very badly.
If I were inclined to do those speeds again I would look to add something discrete that would pull the nose down at speed.
DonkeyApple said:
I've pulled 6300 rpm in top on the 4.3BV I had. I tucked it right next to the high concrete central reservation to try and reduce the risk of wind changes and to hit it early if anything went wrong rather than spearing across into it. The car was on Ohlins and felt fine.
However, on another previous occasion I had been travelling at around 120 up an incline towards the French coast and there was a drumming feeling from the front. In essence the front of the car was lifting up very badly.
If I were inclined to do those speeds again I would look to add something discrete that would pull the nose down at speed.
Hi DonkeyApple,However, on another previous occasion I had been travelling at around 120 up an incline towards the French coast and there was a drumming feeling from the front. In essence the front of the car was lifting up very badly.
If I were inclined to do those speeds again I would look to add something discrete that would pull the nose down at speed.
Couple of questions if i may?
How does the Typhon feel at high speed, not just the handling but the bodywork and interior? Does it still feel TVR? I would of thought with it's design its solid as a brick?
Secondly and off topic how did your PH name come about? You'll have to excuse my inquisitive nature!
I see your london based, was it your Typhon being serviced in Jasons about 5/6 months back?
Always found your griff contributions informative!
7 TVR said:
Hi DonkeyApple,
Couple of questions if i may?
How does the Typhon feel at high speed, not just the handling but the bodywork and interior? Does it still feel TVR? I would of thought with it's design its solid as a brick?
Secondly and off topic how did your PH name come about? You'll have to excuse my inquisitive nature!
I see your london based, was it your Typhon being serviced in Jasons about 5/6 months back?
Always found your griff contributions informative!
Hi. It does feel immensely sure footed. It's in the turn in on rapid corners where you could always feel some elect of flex that it shows up best. It's much more rigid. However it's not had a proper work out to date. Couple of questions if i may?
How does the Typhon feel at high speed, not just the handling but the bodywork and interior? Does it still feel TVR? I would of thought with it's design its solid as a brick?
Secondly and off topic how did your PH name come about? You'll have to excuse my inquisitive nature!
I see your london based, was it your Typhon being serviced in Jasons about 5/6 months back?
Always found your griff contributions informative!
The donkey apple used to be horse apple but I posted and amusing picture of a bloke 'loving' his Range Rover Classic and then the mod seemed to have a wierd issue with people who worked in the City. The horse apple is what you find on the road after a horse has been past
. I think it is a US term equivalent to bulls
t. It wasn't my Typhon at Jason's. If it was reflex green then it was probably Bob's.
How's your LS3 running? I have to say that 250/300 bhp was enough for me in the Griff
haircutmike said:
A bit!
LOL, morning Peter hope your well? Into my third week with this prolapsed disk and really getting fck off! [Mega Pain] Can't walk properly never mind drive!Did not stop me being a passenger though and have managed to find the cerb we have been looking for!
Have spent the best part of two years on the Griff and was really looking forward to showcasing all the hard work people have put into it @ Chatsworth!
Only conciliation is the weather, but really feel for everyone who could go and all the hard work the organiser's have put in to running the event!
Oh well just have to get better for the Growl
BTW you know i love your chim ;}
DonkeyApple said:
Hi. It does feel immensely sure footed. It's in the turn in on rapid corners where you could always feel some elect of flex that it shows up best. It's much more rigid. However it's not had a proper work out to date.
The donkey apple used to be horse apple but I posted and amusing picture of a bloke 'loving' his Range Rover Classic and then the mod seemed to have a wierd issue with people who worked in the City. The horse apple is what you find on the road after a horse has been past. I think it is a US term equivalent to bullst.
It wasn't my Typhon at Jason's. If it was reflex green then it was probably Bob's.
How's your LS3 running? I have to say that 250/300 bhp was enough for me in the Griff
The engine is nothing short of brutal, the car just keeps pulling, no thats wrong because it does not feel like your being pulled down the road, more like thrust from behind. The donkey apple used to be horse apple but I posted and amusing picture of a bloke 'loving' his Range Rover Classic and then the mod seemed to have a wierd issue with people who worked in the City. The horse apple is what you find on the road after a horse has been past
. I think it is a US term equivalent to bullst. It wasn't my Typhon at Jason's. If it was reflex green then it was probably Bob's.
How's your LS3 running? I have to say that 250/300 bhp was enough for me in the Griff
I strengthened the chassis and added a roll-cage so chassis twist is not to bad! I'm having a few teething troubles with the FBW as mentioned in the LS3 thread but apart from that i love it! It spins the rears in any gear :]
If your ever in the Richmond area pop in & you can check it out! Especially if your out in the Typhon lol
I did look long and hard at the Grey one Jason had up for Sale, but just could not justify the outlay especially as i want to go TVR racing next year!
- that'd make (an indicated) 189 @6,300 The AJP Griff said:
quote=DonkeyApple]I've pulled 6300 rpm in top on the 4.3BV I had......
Any idea what your gearing was? With std gearing that would have been 280ish mph!!!The car was the Gerry Marshall Griff and the engine had been built to his spec with quite a high cam. Made it very revvy and the most amazing 'drivers' car. It had standard gear ratios so 80 in top was 3000.
It would rev well over 6000 and the speedo on that occasion was registering what must have been well into the 170 area.
I just don't know what speed it was really doing but I've always suspected that because the power band was so much higher up the rev range than a normal 500 that it could reach a higher top speed. It would certainly go off the clock which I think I recall as 160 as the last number?
DonkeyApple said:
That's why I mentioned revs and not the speed that was showing. Back in those days I had no way of displaying speed accurately.
The car was the Gerry Marshall Griff and the engine had been built to his spec with quite a high cam. Made it very revvy and the most amazing 'drivers' car. It had standard gear ratios so 80 in top was 3000.
It would rev well over 6000 and the speedo on that occasion was registering what must have been well into the 170 area.
I just don't know what speed it was really doing but I've always suspected that because the power band was so much higher up the rev range than a normal 500 that it could reach a higher top speed. It would certainly go off the clock which I think I recall as 160 as the last number?
Do you know the whereabouts of this car now?The car was the Gerry Marshall Griff and the engine had been built to his spec with quite a high cam. Made it very revvy and the most amazing 'drivers' car. It had standard gear ratios so 80 in top was 3000.
It would rev well over 6000 and the speedo on that occasion was registering what must have been well into the 170 area.
I just don't know what speed it was really doing but I've always suspected that because the power band was so much higher up the rev range than a normal 500 that it could reach a higher top speed. It would certainly go off the clock which I think I recall as 160 as the last number?
DonkeyApple said:
I've pulled 6300 rpm in top
I managed 6300 in my Chim also on stock gearing/wheel/tyre size174 on the gps didn't feel to bad except the bonnet trying to fly open and then it did....... almost covered the seats in a brown liquid
I need to go Vmax to get this confirmed
Alexdaredevilz said:
I managed 6300 in my Chim also on stock gearing/wheel/tyre size
174 on the gps didn't feel to bad except the bonnet trying to fly open and then it did....... almost covered the seats in a brown liquid
I need to go Vmax to get this confirmed
My calculations confirm that 6300 does indeed equate to 174.5mph if using a 245x45x16 rear tyre and 0.80 fifth gear ratio with the earlier GKN diff ratio of 3.31:1174 on the gps didn't feel to bad except the bonnet trying to fly open and then it did....... almost covered the seats in a brown liquid
I need to go Vmax to get this confirmed
Quite honestly I'm amazed these cars can do that speed as although the gearing is there to do it I would have thought that more bhp would be needed to be honest?
How can you measure how much bhp is needed though? I've seen calculators to calculate this but the sticking point is surely that TVR's original real horsepower and true top speed are pretty difficult to establish.
The AJP Griff said:
My calculations confirm that 6300 does indeed equate to 174.5mph if using a 245x45x16 rear tyre and 0.80 fifth gear ratio with the earlier GKN diff ratio of 3.31:1
Quite honestly I'm amazed these cars can do that speed as although the gearing is there to do it I would have thought that more bhp would be needed to be honest?
How can you measure how much bhp is needed though? I've seen calculators to calculate this but the sticking point is surely that TVR's original real horsepower and true top speed are pretty difficult to establish.
Mine used to run out of puff at 5.2-5.4k rpm even tho it dyno'd at 308 @ 5k rpm it seemed to run lean over 5k in high gear. (quite happily bounces of the rev limiter (6750) now tho) Quite honestly I'm amazed these cars can do that speed as although the gearing is there to do it I would have thought that more bhp would be needed to be honest?
How can you measure how much bhp is needed though? I've seen calculators to calculate this but the sticking point is surely that TVR's original real horsepower and true top speed are pretty difficult to establish.
Can't help on the gearing maths, it's a 225/45/16 tyre
Power? 310-350 not had it on the rollers, but managed a 12.48@112mph on road tyres
Cam comes on song at 4k-6500
Ran out of rpm not power at that speed, would of done another 5-10mph IMO
But I doubt the car would of help together any faster, it was dam noisy, windscreen rubber came off, bonnet flow open etc
I keep it below 160 now
Power? 310-350 not had it on the rollers, but managed a 12.48@112mph on road tyres
Cam comes on song at 4k-6500
Ran out of rpm not power at that speed, would of done another 5-10mph IMO
But I doubt the car would of help together any faster, it was dam noisy, windscreen rubber came off, bonnet flow open etc
I keep it below 160 now
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