Anyone running an official book?

[RS2000CUSTOM]

Sure it wasnt 215 7" ronals

More like 215 Blue boxes

[mk1gaz]

Well mine wasnt cheap - I charged myself a fortune

Lol , i like your style .
So far all the 195+bhp pintos on my mates Dyno-Dynamics have had steel stroker cranks giving 2.2+ litres , steel "H" section rods , high compression forged pistons , big valve race heads and race cams , twin 48 or 50's blah blah blah and have all cost over £5000 in bits alone . The best budget ones with offset ground standard cranks , diesil or x-flow rods are normally around 2.2 litres have done about 185bhp .
Any pintos around these numbers will be ace on a Dyno-Dynamics as it don't happen too often .
"There ain't no replacement for displacement" so the bigger the engine the easier it is too get higher numbers from it . This won't affect it's "bhp per litre" level though so any pinto on pump fuel making over 85bhp per litre on a Dyno-Dynamics is very good and 95+bhp is awesome .

[RS2000CUSTOM]

I used a lot of stock bits in mine

Basics are :-

200 block
4x4 Cozzy crank and rods
94mm Accralite Forged Pistons
Cylinder Head Developments Race Head
BF63 cam
45mm Inlet 38mm Exhaust
Twin Weber 45's

[oveRSteer]

So gaz, i have a print out from the previous owner from "Dastek Dynamometer" . . . .is a dynamometer the coast down type? If so i am showing 131.8 bhp at the flywheel, which could amount to 112ish bhp on a "proper" RR. . . Which would then equate to about 92bhp at the wheels?

don't think i'll bother afterall

[RS2000CUSTOM]

don't think i'll bother afterall

Ah dont be like that !

You may surprise yourself

Rolling Roads are only a comparison on that 1 day

ie/ do a power run and get 100 BHP

same day same rollers fit a new cam and now BHP = 115BHP

So you can safely say you have gained 15BHP

Go to another Rolling Road on another day and get 140BHP yet no further work has been carried out on car so which reading is more valid ?

The same rollers on same day are more accurate in my books BUT only as a comparison against an earlier run on the same rollers

[mk1gaz]

Yes it doesn't matter what number you get compared to elsewhere it's just a bit of fun and good too compare 25x cars on the same machine in the same atmospheric conditons and temperatures .
We'll get accurate measured wheel bhp and torque numbers and estimated flywheel bhp and torque numbers . The measured wheel bhp and torque is what moves the car at the end of the day so this is the most important and this will be deadly accurate .
Also an engine with a higher "peak" bhp number will not necesssary be better/faster than an engine with a lower "peak" bhp number . It's the largest average power band of numbers (say from from 5500rpm - 8500rpm) that counts in the real world . Hope that makes sense .

[RS2000CUSTOM]

It's the largest average power band of numbers (say from from 5500rpm - 8500rpm) that counts in the real world . Hope that makes sense .

After 2 x cans of Cobra and a bottle of dry white it makes no sense at all

[oveRSteer]

Hehe i was just kidding mate. I'm coming along regardless of how weedy my engine is. Like i said,it'll help me choose what i wanna have built! Cant beat an old skool takeover!

Although i hope there isnt too many of us,otherwise the RAC man won't be able to make it to andy/kev's cars

[RS2000CUSTOM]

Rest assured the RAC and AA will be given prior warning so they can get a few recovery trucks on standby

[mk1gaz]

So gaz, i have a print out from the previous owner from "Dastek Dynamometer" . . . .is a dynamometer the coast down type? If so i am showing 131.8 bhp at the flywheel, which could amount to 112ish bhp on a "proper" RR. . . Which would then equate to about 92bhp at the wheels?

don't think i'll bother afterall

Yes a Dastek is a "coastdown" dyno , it measures transmisson losses when you dip the clutch and let the drivetrain coastdown . It then adds this reading to the wheel bhp reading to get the flywheel bhp reading . The problem with this is that the gears are under no load at the time (when coasting) so it's fooooooookin useless as a measuring tool , lol !!!!!!!!!!
You may still be at 131bhp as you just don't know until you give it a try . In my experiance they always make less though . This is a bit of a sweeping statement i know but so far that's what has always happened .
Also as the differences between the 2x machine types are a percentage , the more you had the more you lose . So with 131bhp you may only lose about 10bhp . Hope that makes sense as it's getting late and my brains giving up .

[mk1gaz]

After 2 x cans of Cobra and a bottle of dry white it makes no sense at all

Ok , here's a top notch diagram i quickly knocked up earlier !!!!
The 240bhp engine sounds faster down the pub but the 210bhp one will kill it in a race even though it's "peak bhp" number is much less .

[RS2000CUSTOM]

That picture is a fake

It is not on the back of a beer mat

[oveRSteer]

A good example of a peaky engine would be that horrible rotary engine from the rx8, gotta be driven high up in the rev range to get anything out of it!

[Andyc]

there's gonna be some amazing excuses that day, we need to video the faces of peeps when they get the results, suicide watch for andyc at brooke meadow

The problem with that statement Grarham i dont care what it does as it aint a power motor

[wayne m]

So what about the cars tested at lunch compared with the ones tested in the morning early, and evening 4.30 onwards.

There is a spaner in the works

Bhp figures will drop by about mid day then come back as sun starts to go down unless, dyno is air pressure controlled

Normally about 15 bhp on a 300 bhp engine so possibly 5 bhp on a 100bhp engine.

Get her on 1st Dave.

On our dyno the best ive seen is 234 out of a 2.6 pinto, massive torque,
Had some good 2ltr pinto's but only ever see 180 ish, works bd's 230, wrc escort engines 280, millingtons 2.5 300++++++

When the flag drops the bull*hit stops.

Be interesting day!