How Many Horses? - Free Beer

[omegod]

I predict a disappointing sub 200 initially then up to 242 with a fettle 

[The_Equalizer]

As an aside, do rather like the registration number.

[inconsistant]

Theres an interesting article on the history of AC cars here:

https://driventowrite.com/2021/01/22/born-survivor-part-one-ac-ace-aceca-greyhound-cobra-428-invacar/

continued here:

https://driventowrite.com/2021/01/27/born-survivor-part-two-ac-3000me-cobra/

[somewhatfoolish]

17 hours ago, Saabnut said:

I will do a post on the history of the car later in the week. It was originally fitted with a brand new 357 but when Carroll Shelby drove it (I have a picture of him at the wheel) he insisted on a 427 and a 400 out of a 73 Chevelle was acquired and built to what it is.

That presumably puts the ford nerdists in a tizwaz over a GM product displacing FoMoCo.

[Quintus]

I'll go for an entirely random 307.

[Saabnut]

It looks like it is all go for tomorrow  

A few friends are running a sweepstake on it so I will go with the same number I have there. 365bhp

[HMC]

Maybe also a BHP/tonne booby prize as well?

[SiC]

0bhp

 

 

...The clutch will fail again. 😬

[Saabnut]

Set up and ready to start....

 

[dome]

I'm optimistic so will say a nice round 400bhp

 

I'll swap the pint for a run around the block in this

[Saabnut]

First run completed, no figures yet (git!) but primary and secondary jet change underway

[bezzabsa]

do we get to HEAR this??????

[spartacus]

I like seeing a car produce it's best on a dyno, there's an element of 'edge-of-the-seat' anticipation.

Surely with a half decent cam that should be able to make 350bhp.

 

[Saabnut]

I have a video on a run but a) cannot figure how to get it off my phone and b) it is very muted due to the exhaust collectors.

Anyway, the results are in. I am still awaiting confirmation of the weight but believed to be 1075kg. Very happy with the torque, a little disappointed with the power output.

[Skizzer]

So I believe @Fumbler was closest (and I’m quietly smug about guessing within 2.5%).

I’m sure you can get that up into the 300s with a little bit of fettling though 😊

Also

1 hour ago, bezzabsa said:

do we get to HEAR this??????

this.

[spartacus]

That'll drive great with all that torque, I hope you've got good tyres!

[Saabnut]

A pint to @Fumbler and to show I am not a poor loser one for @Skizzer as well!

Having thought about it, one of the priorities with this car is reliability as it will be making fairly regular trips between Aberdeen and Lemans (just under 2k miles round trip) and having a relatively unstressed engine should help with that. The torque should ensure a fun drive whilst retaining some semblance of control.

There are only 2 tyres still made for the rear, BFG All terrains  and Avon ZZR semi race tyres. The last set (9 years ago) cost £1200 trade, and they will need changing at the end of this year. They are superb tyres though.

[JeeExEll]

Look at the torques, for a 1100kg car.   PMSL.  Happy times ahead.

[SiC]

260bhp per tonne is pretty respectable. 

More than a modern Golf R, a A45 AMG or even a Mustang GT V8. They'd have to be in the bigger engined Dodge Challenger to get close.

[hairnet]

explain why the tyres are insane?

how 11's do ya get when ya gas it?

 

[hairnet]

if you dont understand youll never get it

[Skizzer]

35 minutes ago, JeeExEll said:

Look at the torques, for a 1100kg car.   PMSL.  Happy times ahead.

This. Torque is much more fun than power and you’ve got literally truckloads of it.

What a fabulous device in every way 😁

1 hour ago, Saabnut said:

and to show I am not a poor loser one for @Skizzer as well!

Ha! Cheers! I’ll be glad to get a round in too when such things are allowed again.

[somewhatfoolish]

2 hours ago, Saabnut said:

I have a video on a run but a) cannot figure how to get it off my phone and b) it is very muted due to the exhaust collectors.

Anyway, the results are in. I am still awaiting confirmation of the weight but believed to be 1075kg. Very happy with the torque, a little disappointed with the power output.

I R disapoint. Still, as you say it should be docile and civilised to drive with curves like that; there's some constriction in there as it gives up at 3700 and starts twiddling its thumbs.

[Saabnut]

Just spoken to my friend who took it down. First he reminded me that it was wheel HP so add 20-30% ??? for transmission losses. The printout shows losses as 19HP but I am unsure of what these things mean. He said that to increase HP we would reduce Torque, especially at low revs. He said it drives superbly and would not change a thing! Coming home at 85mph it was sat at 1800 rpm and just lolloped along!

@hairnetthe tyres are super sticky, the last attempted 11 (on the Mulsanne straight) destroyed the clutch......

When lockdown ends I can go and fetch it.....

The printout:

[Asimo]

What size are the rear tyres? Just curious, having once run a car for which rear tyres were just no longer available (255/45 -15).

 

[Saabnut]

2 minutes ago, Asimo said:

What size are the rear tyres? Just curious, having once run a car for which rear tyres were just no longer available (255/45 -15).

 

I cannot be sure but memory tells me 285/50-15 - the only reason they are still available is they were fitted to early 60s Corvettes, hence race tyres being the default.

[hairnet]

where did the plate come from?

how blunt would the performance if me and @beko1987 sat in it be? :D

 

[SiC]

1 hour ago, Saabnut said:

He said that to increase HP we would reduce Torque, especially at low revs.

You might already know this but:

BHP = Torque * RPM / 5252

A lot of low down torque that eases off with revs will give a max bhp that appears disappointing. Modern engines with turbos and fuel injection can give a flat torque curve, so give good bhp and still low down performance.

Low down torque is the head snapping umpfh and responsive feel that people likes.

[bezzabsa]

Tow anything.................hmmmmm cobra with full on Transit and Dag lovers 'van on the back.....LOL

[Shandylegs]

Looking at the first graph the house looks to have been already adjusted* to  flywheel figures?

Must admit to also having been disappointed with the figures produced, I would have been expecting somewhere around 400 flywheel figure?