2014 Thunder Road confirmed Sat 9th August Woodbridge

[Xpuffin]

I don't understand this constant referral to cost.
Yes, for those that DIY a huge amount can be saved. Most on here don't have that type of expertise and so rely on the aftermarket companies. Thats a totally different situation, I'd be very surprised if the actual costs were much different.
Never forget that going faster is a V squared fact, both physically and financially. For those who don't understand how much it costs to go just a few mph faster at these type of speeds perhaps you should step back a bit and do some research before commenting.
It seems apparent to me that NA is limited by ultimate power V emissions/ driveability and FI with heat issues and incorrect gearing at TR.
Personally I'd love to see a 180 mph build at TR, but if Rich is running 500 whp at 171 how much more power do you all think is needed for that extra 9 mph,and how drive able would that be on the road.
That makes some comments on here a little throwaway imo

[jameshsv]

All the 500+ bhp N/A cars than run done very well.Would love to see what a 600bhp N/A car could do at TR compared to the 600+bhp S/C cars.

[jameshsv]

KMud said:

Top speed and power be damned, Thunder Road has told me to get the 3.9 gears in sooner rather than later!

They work well but I think there limit would be about 170-175 depending on what power you have.

[Xpuffin]

jameshsv said:

All the 500+ bhp N/A cars than run done very well.Would love to see what a 600bhp N/A car could do at TR compared to the 600+bhp S/C cars.

171

[MyM8V8]

fastbikes76 said:

I cant say I saw any that were modded PURELY with TR in mind.

Actually I did! I fitted a £400 water/meth injection kit (which hurt me on both counts) and a £20 flat bonnet (which increased my IATS and hurt me).

TR, for me, gives me an opportunity to try and make my motor go faster and push the envelope. Its all things to all men, that's the great thing about TR and everybody gets soemthing out of it and enjoys the day.

fastbikes76 said:

All cars I saw were full going road cars just there too see what they did. That too me is as good a comparison as you will get.

Thats true, no drag cars on trailers.

fastbikes76 said:

Again, I personally am not saying the FI guys have wasted money

I did.

[EmmaJ]

jameshsv said:

KMud said:

Top speed and power be damned, Thunder Road has told me to get the 3.9 gears in sooner rather than later!

They work well but I think there limit would be about 170-175 depending on what power you have.

0.74 5th gear, with a 3.9 diff and a 6700 rev limit is 178MPH

[MyM8V8]

EmmaJ said:

jameshsv said:

KMud said:

Top speed and power be damned, Thunder Road has told me to get the 3.9 gears in sooner rather than later!

They work well but I think there limit would be about 170-175 depending on what power you have.

0.74 5th gear, with a 3.9 diff and a 6700 rev limit is 178MPH

4L60E four speed auto gearbox (In Leathermans Car) has a fourth ratio of .696

[jameshsv]

EmmaJ said:

itnd
0.74 5th gear, with a 3.9 diff and a 6700 rev limit is 178MPH

Thanks Emmaj Would that be with a cv8 box and 18" wheels or 19" wheels.

[Xpuffin]

MyM8V8 said:

4L60E four speed auto gearbox (In Leathermans Car) has a fourth ratio of .696

If he can hit 180 with that I'll be very impressed.

Edited by Xpuffin on Monday 11th August 18:48

[jameshsv]

Xpuffin said:

171

I thought Ringrams car was less than 600bhp.What about a 600bhp cv8 with a 3.9 diff and 7k rev limit what would be its possible speed over the mile.Thanks Xpuffin

[EmmaJ]

jameshsv said:

EmmaJ said:

itnd
0.74 5th gear, with a 3.9 diff and a 6700 rev limit is 178MPH

Thanks Emmaj Would that be with a cv8 box and 18" wheels or 19" wheels.

That's with 19" wheels but not sure on the ratios, think they are stock VXR ones :s

What's the size of 18" wheels? 235/45/18?

[Xpuffin]

jameshsv said:

They work well but I think there limit would be about 170-175 depending on what power you have.

That's for an m6, an M12 would be way down at about 155-60

[Xpuffin]

jameshsv said:

I thought Ringrams car was less than 600bhp.What about a 600bhp cv8 with a 3.9 diff and 7k rev limit what would be its possible speed over the mile.Thanks Xpuffin

What are the M6 ratios.

[jameshsv]

EmmaJ said:

That's with 19" wheels but not sure on the ratios, think they are stock VXR ones :s

What's the size of 18" wheels? 235/45/18?

245/40/18 cv8 box ratio is different to the vxr box

[jameshsv]

Xpuffin said:

That's for an m6, an M12 would be way down at about 155-60

o4 cv8 box is a t56 I think. ive done 165 without hitting the limiter in the mile wich is set at 6.9k

[KMud]

EmmaJ said:

jameshsv said:

KMud said:

Top speed and power be damned, Thunder Road has told me to get the 3.9 gears in sooner rather than later!

They work well but I think there limit would be about 170-175 depending on what power you have.

0.74 5th gear, with a 3.9 diff and a 6700 rev limit is 178MPH

That would do, unlikely to have the power to hit 178MPH anyway! More acceleration definitely needed from mine, and would make a big difference all-year round.

[EmmaJ]

Ok, to keep things consistent I've calculated the 5th gear max MPH using 3.9 diff and 19" (245/35/19) wheels and 6700 limiter:

M12 (0.84) 157MPH
M6 (0.74) 178MPH
MZ6 (0.71) 185MPH

HTH

[stevieturbo]

MyM8V8 said:

I was changing up at 7k with standard rockers. Dont want to move the limiter any higher though. (At the moment)

I can rev to 7k and have went over it, but it isnt happy up there.
At TOTB due to the gearbox problems....buzzed it to near 8k a few times when selecting the wrong gear LOL.

When you need as much power as possible to overcome drag etc at high speed to go faster, you dont want to be on the downhill slope after peak power and it's falling off..

At present, mine goes better shifting around 6700-7000rpm, depending what gear etc. Lower gears best to shift a bit early as no grip anyway.

Some do push hydraulic cams to 7500 etc, but I think moving to a solid roller will probably give the best and most reliable high rpm use, and really cant see any negatives other than cost.

Ive had several cams over the years, various engine sizes etc too. But for the most part none have been overly willing to go much beyond 7k.
I could push them, but I'd be doing just that, pushing it for the sake of pushing it.

If I had peak power close to 7k along with the ability to shift a little higher and remain on the power better, I reckon I could get damn close to 200mph in 1km.

[Xpuffin]

jameshsv said:

Xpuffin said:

That's for an m6, an M12 would be way down at about 155-60

o4 cv8 box is a t56 I think. ive done 165 without hitting the limiter in the mile wich is set at 6.9k

Yeah T56 M6

[snowwolf]

goldvxr8 said:

Right in the end my car look good
Sounds f???? Good
On the road it f??????? Fun to drive
So I am still happy to say I have a big v8. Supercharged car with 670
Get more cash get more power

And ditch that window spoiler Goldy, def not good at speed, it causes far to much turbulence behind the car, I took mine off a week after fitting it.