Daviesdj
|
| posted on 4/4/13 at 01:12 PM |
|
|
V8 Project - advice on progress
Hi guys - many thanks for all your input on the rear axle choice- very useful - But... Am getting a bit worried, have this lovely project gathering
momentum - visions of the galv locost chassis holding in a lovely 5.0 special RV8 (favourite engine of all:-)) - non road going to avoid all the sva
fuss and cost - been through it with landies! And taking it to track days and sprint / hill climbs eventually:-) - I have never competed in track
Motorsport - it is an ambition - hence the build. BUT - according to the hill climb and sprint association classes my idea does not fit well into a
class , and I am not sure weather it will be received at all?? Also as a beginner apparently I will not be able to drive a 5.0 for some time?? Is that
correct?? Should I not waste time and simply put a 2.0 engine in and avoid hassle?? Need to decide now really - is there any way I can gain enough
training (licence wise) to use my 5.0? I could do that while building - plan to get my track licence obviously prior to it. What do ou think guys..
Just realised this is on the incorrect sub section - very sorry guys
Dave
|
|
|
|
|
jamiepearson69
|
| posted on 4/4/13 at 03:01 PM |
|
|
Hi Dave
I'm not really up to speed on the latest Hill Climbing regs, however I would say that the basis behind the locost design was the power to weight
ratio.
Putting a big V8 in a locost chassis is in my mind asking for trouble, I think you may be trying to use a sledgehammer to crack a nut.
Go with a BEC or zetec, and get the same usuable power. You will also find that there will be more people in your class at Hill Climbs that you can
compete with.
With regards to glvanising the chassis, I think you may also run into trouble with distortion due to the heat of the process, which is why you rarely
see locost chassis galvanised. The modern ethods of powder coating are very good.
Hope this helps!
|
|
|
nick205
|
| posted on 4/4/13 at 03:13 PM |
|
|
Best to settle on the class first, then work your build towards the regs. Always look at what otehrs are doing in the class as well, to see what
works best.
|
|
|
CNHSS1
|
| posted on 4/4/13 at 04:14 PM |
|
|
quote:
Originally posted by Daviesdj
Hi guys - many thanks for all your input on the rear axle choice- very useful - But... Am getting a bit worried, have this lovely project gathering
momentum - visions of the galv locost chassis holding in a lovely 5.0 special RV8 (favourite engine of all:-)) - non road going to avoid all the sva
fuss and cost - been through it with landies! And taking it to track days and sprint / hill climbs eventually:-) - I have never competed in track
Motorsport - it is an ambition - hence the build. BUT - according to the hill climb and sprint association classes my idea does not fit well into a
class , and I am not sure weather it will be received at all?? Also as a beginner apparently I will not be able to drive a 5.0 for some time?? Is that
correct?? Should I not waste time and simply put a 2.0 engine in and avoid hassle?? Need to decide now really - is there any way I can gain enough
training (licence wise) to use my 5.0? I could do that while building - plan to get my track licence obviously prior to it. What do ou think guys..
Just realised this is on the incorrect sub section - very sorry guys
Dave
if you build it as a kit car locost with a V8 then I suspect you would be ModProd specialist production. If its own design and a special, then that
becomes Sports Libre.
Sports Libre over 2000cc requires a National A Open licence which you can only obtain through attending nd completing events on a Nat B, then Nat A
licence and getting signatures from Clerk of the Course each time to say you competed safely and competently to get to a Nat A 'Open'.
the only way around it is, iirc, if the cars over 2000cc in sports Libre but competes in a road legal condition (inc tax, insurance and MOT) then you
can run on a Nat B licence.
there have been a number of V8 7 types on the hills each year, but the light weight design along with huge low down grunt does mean you will tend to
fight the engines 'advantages' rather than use them (power & torque).
a decent 2L car engine such as a zetec or Vaux twincam 2L with 150-200brake usually sees off a similar but V8 powered version with 300hp.
That's why the bike engine cars score, lightweight which doesn't act as a pendulum and relatively limited torque at the bottom end, much
easier to drive and underpowered (more accurately under-torqued) car fast imho
that's not to say don't do it, just go in with your eyes open and attend a few events and speak to people with similar cars.
or buy a ratty TVR chimera and drop your nice engine in, with a full interior could be in std Roadgoing class? no licence issues
"Racing is life, everything else, before or after, is just waiting"---Steve McQueen
|
|
|
Daviesdj
|
| posted on 4/4/13 at 04:55 PM |
|
|
I appreciate the light weight is not ideal for that engine - but i hav
E the bits and parts for a v8 build, also I am a bit of a rover v8 nut. Have the galv chassis already. Just am a but nervous I may not be able to use
it anywhere:-) - could go for the IVA test and get it othe road to compete- but think i would be happy to take it to track days, and to Santa pod
where I am sure it would be welcome, with a big set of sticky tyres, would I have any trouble taking it to track days?? Have been in. Standard road
cars but never taken or been with anybody taking a custom build?? Just looking for re-assurance really:-) sure with an aggressive cam and light
rotating assembly the v8 may not be so bad...
|
|
|
fesycresy
|
| posted on 4/4/13 at 06:01 PM |
|
|
You love V8's, then use one, its no point building a car you've not got your heart into.
Some hill climbs need an MOT don't they?
-----------------------------------------------------------------------------------------------------
The sooner you fall behind, the more time you'll have to catch up.
|
|
|
Simon
|
| posted on 4/4/13 at 06:49 PM |
|
|
This bec - V8 (extremes of the i/c spectrum) debate will go on for eternity - it was going on when I started building my (V8) locost 11 years ago.
I would suggest that you do a) build a v8 cos really, there's nothing wrong with it - it'll handle just fine (it's still on 700kgs)
and you want to b) get it on the road c) ignore anyone trying to put you off - they've got their ideas, you've got yours!
ATB
Simon
|
|
|
CNHSS1
|
| posted on 4/4/13 at 07:12 PM |
|
|
just for the record, im not trying to put him off, but no point building a car for a class he hasnt got a licence for either!
if you like V8s then go for it :-)
"Racing is life, everything else, before or after, is just waiting"---Steve McQueen
|
|
|
40inches
|
| posted on 5/4/13 at 01:03 PM |
|
|
If it's what you really want, go for it!
You may be interested in this RV8
Caterham hill climber.
|
|
|
SCAR
|
| posted on 5/4/13 at 05:08 PM |
|
|
If its v8 engines that float yer boat then fit the v8 cause thats where your interest lies.
Obviously a 5.0 litre in a 7 is the extreme end of one Avenue in 7 ownership, it may not necessarily be the fastest or the best handling but it could
be what you like best, unless you try one you'll never know. I've owned several 7s powered by crossflows, Pintos, CVH and now RV8,
which is best? couldn't say!
The main problem with the big v8 is that although you have monster torque which is great for pushing the car on a bit putting it down through the
back wheels in such a light car is difficult. A heavy throtle foot and you will be constantly breaking traction.
Great!!
Good luck
[img]http://
 
Description
[/img]
mmmmmmm.................v8
|
|
|
Daviesdj
|
| posted on 5/4/13 at 11:18 PM |
|
|
That V8 Chaterham is one of the most lovely things I have seen - notice the pic of the blue RV8 there was a thor inlet setup used - - bet this is with
a hydrolic cam and very torquey setup - perhaps a higher spec mechanical cam so power is higher up the rev range may make it better for putting the
power down?? Any thoughts - My current setup is a plenum 4 barrel style (typical) - good all rounder (2 plane manifold) - but I have fabricated a
crossover individual TB setup for the locost - this with 300 buick heads and mechanical cam should be a good track engine, perhaps peekey enough to
not break traction at 2000 RPM???
|
|
|
.jpg){kind=avatar}
