KAMBO
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| posted on 21/10/08 at 08:49 PM |
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cosworth engine question
just a newbie with a cossy question ?
a standard 205 blocked pinto can have it's head swapped for a twin cam normaly aspirated cossy head along with uprated everything else...am i
right or am i barking up the wrong tree ??
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Jon Ison
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| posted on 21/10/08 at 08:56 PM |
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Yes, but.........
You need the crank pulley too for the cam belt and a lot of work on the head to get decent power, its designed to have a turbo blowing loads of air
into it not a piston sucking air in, oh and a side entry dizzy cap (pug 205 fits) else you cant get the carbs on.
The head really does need serious amounts of work to make any decent power on a "atmo cosworth"
eta "KAMBO", you nipped on here from pistonheads ? Welcome.
[Edited on 21/10/08 by Jon Ison]
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DaveFJ
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| posted on 21/10/08 at 08:57 PM |
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pretty much right....
if you want more info look at Des Hammills book.
be aware that the cosworth crank is stronger than the standard pinto and has 9 bolts for the flywheel rather than 6.
It was my intention to do just that but after spending a small fortune on my pinto it became a little too much...
Dave
"In Support of Help the Heroes" - Always
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KAMBO
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| posted on 21/10/08 at 09:00 PM |
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quote:
Originally posted by Jon Ison
Yes, but.........
You need the crank pulley too for the cam belt and a lot of work on the head to get decent power, its designed to have a turbo blowing loads of air
into it not a piston sucking air in, oh and a side entry dizzy cap (pug 205 fits) else you cant get the carbs on.
The head really does need serious amounts of work to make any decent power on a "atmo cosworth"
eta "KAMBO", you nipped on here from pistonheads ? Welcome.
[Edited on 21/10/08 by Jon Ison]
sounds like a lot of work for little gain
think i would be better off with a big valve head fast cam and a set of bike carbs ??
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nick205
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| posted on 21/10/08 at 09:01 PM |
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Check Des Hammill's book published by Veloce. As mentioned, you can do it but realistically for what it would cost to do it properly you could
fit a very tidy 2.0 Zetec install with throttle bodies and cams and achieve the same sort of power.
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KAMBO
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| posted on 21/10/08 at 09:03 PM |
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eta "KAMBO", you nipped on here from pistonheads
nope not me. i is new
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Jon Ison
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| posted on 21/10/08 at 09:05 PM |
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I'm going back more years than I care to mention but when I did it it cost a small fortune, dry sump belt let go and lost engine, replaced with
a red top VX on same carbs, made more power out of box for a dam site less.
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Mr G
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| posted on 21/10/08 at 09:08 PM |
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Why not go for the normally aspirated engine cosworth actually had a hand in - the vauxhall XE  (obviously the coscast version)
Aftermarket ecu and throttle bodies plus arp bolts should see you near 200bhp
Edit : Above post appeared while I was typing my reply 
[Edited on 21/10/08 by Mr G]
Normal is getting dressed in clothes that you buy for work and driving through traffic in a
car that you are still paying for - in order to get to the job you need to pay for the clothes
and the car, and the house you leave vacant all day so you can afford to live in it.
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hicost blade
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| posted on 21/10/08 at 09:26 PM |
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N/a Cosworth is a money pit without much gain. A friend fits 2.0 Duratecs to Mk1-MK2 Escort rally cars with ZX6 TB's, they run on standard
management to produce a reliable 190bhp and he even uses the original inlet manifold (with the original injector holes plugged). probably do it with a
low miler for a grand. Slap an aftermarket ECU on it and 250bhp is within easy grasp. He also has the ali bell housings for about £100 I believe.
Duratecs are newer and im sure they are lighter than Cosssies and XE's.
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KAMBO
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| posted on 21/10/08 at 10:23 PM |
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looks like i've opened a can of worms here
heres another one for you....whats the cheapest £ per hp engine i could hypotheticaly fit in my locost ???
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Jon Ison
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| posted on 21/10/08 at 10:45 PM |
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Only one answer, £ per performance = bike engine, end of.
Bear in mind the free 6 speed sequential box.
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hicost blade
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| posted on 21/10/08 at 11:13 PM |
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http://cgi.ebay.co.uk/BRISTOL-SAPPHIRE-MK-202-GAS-TURBINE-JET-ENGINE_W0QQitemZ300267879916QQcmdZViewItem?hash=item300267879916&_trkparms=39%3A1%7C
66%3A2%7C65%3A3%7C240%3A1318&_trksid=p3286.c0.m14
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mcerd1
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| posted on 22/10/08 at 08:48 AM |
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quote:
Originally posted by DaveFJ
pretty much right....
if you want more info look at Des Hammills book.
be aware that the cosworth crank is stronger than the standard pinto and has 9 bolts for the flywheel rather than 6.
It was my intention to do just that but after spending a small fortune on my pinto it became a little too much...
the biggest change in the bottom end is the rods & pistons
std cossie rods are much stronger than pinto ones and they use forged pistons (low CR)
I've put cossie rods and crank (+ accralite pistons + steel flywheel) in the bottom of my pinto
this means you also need a cossie oil pump and spray bar/jets (cossie 2wd pump + spray bar fits with no mods but complete costs £200 new)
for the top end as well as the head and all 4 cam pulleys you need a cossie jack shaft (or mod the pinto one)
+ porting the head
+ NA cams
+ manifolds
+...............................
from my own experience if you want a cossie - buy a whole cossie (with all the bits you intend to use) even if you need to rebuild it
buying cossie bits one at a time costs a fortune
and if the blocks dead you can always use a pinto one, but at least you'll have all the other bits
heres mine at the moment (defiatly not locost - well into ££££'s)
the duratec is probably a much cheaper and lighter way to get to 200bhp+
the only down side I can see it that you won't get a duratec through the SVA on carbs
[Edited on 22/10/08 by mcerd1]
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Volvorsport
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| posted on 22/10/08 at 09:24 AM |
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quote:
Originally posted by KAMBO
looks like i've opened a can of worms here
heres another one for you....whats the cheapest £ per hp engine i could hypotheticaly fit in my locost ???
volvo .
www.dbsmotorsport.co.uk
getting dirty under a bus
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britishtrident
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| posted on 22/10/08 at 01:52 PM |
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Cosworth = money pit
Zetec or Duratec = less pain + less outlay + cheap replacements
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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Liam
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| posted on 22/10/08 at 04:25 PM |
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On the most BHP per £ question, it'd have to be something fairly old and turbocharged with the boost cranked up any day. I'm thinking
toyota 3SGTE, Nissan 200sx motor, vauxhall C20LET - that sort of thing. I'm no expert on either of them (but plenty of people here or on
specific manufacturer forums will be), but I'd say any of these, plus the similar ones I've missed, could give you around 300 bhp for
around a grand.
Can't think what could beat that sort of motor for BHP per £, but as Jon says, if it's really performance per £ you're after, then
BEC is also worth considering.
Certainly not an NA cossie, or anything remotely connected with Pinto, anyway
Liam
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MikeRJ
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| posted on 22/10/08 at 06:54 PM |
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quote:
Originally posted by Liam
On the most BHP per £ question, it'd have to be something fairly old and turbocharged with the boost cranked up any day. I'm thinking
toyota 3SGTE, Nissan 200sx motor, vauxhall C20LET - that sort of thing.
Volvo and Saab spring to mind!
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