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overhaul
robertst - 1/11/06 at 06:32 PM

i'm planning my work on the pinto as i cant do anything with the chassis yet...

from reading on the internet and Des Hamill's book, i have decided i shall be upgrading the engine a bit to get a bit more oomph from it.
i'm lookign for at least 150 flywheel bhp (standard is about 120 right?)
i just wanted to check with you guys to see if its ok for what i want...

basically it would entail a new fast road camshaft (i already worked out the lift and duration specs i want), new valves (dont think i'll need springs), new oil spray bar (dunno where that is on the engine), new gaskets all over, core plugs, timing belt, spark plugs and cables, and i'll try to source two DCOEs from the scrappers...

what i dont really know is how much should i be expecting to pay for a carb in a scrappers? theyre about £300 new, so would 150 be wishful thinking?

do i need two carbs or would it be ok with just a bigger 45 weber DCOE?

also, i understand once the engine is put back together, the timing is done with a TDC angle disk on the crank and then the strobe light right?

i guess with all this and the reconditioning/cleaning, i should have a pretty good engine for my car right?

am i missing something?

Thanks
Tom

big_wasa - 1/11/06 at 06:38 PM

I have yet to see a set of dcoe's in a scrap yard in the uk and new are around £600 a pair over here aswell

[Edited on 1/11/06 by big_wasa]

DIY Si - 1/11/06 at 06:41 PM

If you find a scrappy with some in let us all know!! You're often lucky to find a twin choke webber of any sort in this country, let alone anything performance related.

jacko - 1/11/06 at 06:47 PM

Hi Robert i have a pinto it has been rebored 60th has a piper 285 cam modified head free flow exhaust and zx9r bike carbs on the r road it had 140bhp at the wheels i think one of the best mods where the carbs personaly i would not go for dcoe carbs Jacko
ps bike carbs are about 50£ on ebay + home made manifold

MikeRJ - 1/11/06 at 06:50 PM

quote:
Originally posted by robertst
i'm planning my work on the pinto as i cant do anything with the chassis yet...

from reading on the internet and Des Hamill's book, i have decided i shall be upgrading the engine a bit to get a bit more oomph from it.
i'm lookign for at least 150 flywheel bhp (standard is about 120 right?)


No, the bog standard carbed 2.0L (i.e. Cortina) is about 98bhp, the injected version from the Sierra is 105bhp.

Getting a genuine and reliable 150bhp is not a trival bolt on exercise, though perfectly possible with carefull head/valve work, cam and decent inlet and exhaust manifolds

If you are aiming for 150bhp you should probably be looking at twin 40DCOE's at a minimum, though they will pretty much right at their limit for 150bhp, so twin 45's would be a better bet.

You are very unlikely to find a decent set of DCOE's at a breakers, though you may just strike lucky if you search around. Bear in mind these are complicated and very delicate instruments, if a bodger has previoulsy owned them they may be only good for scrap.

Personaly I think David Vizards book, whilst a bit old, is a far better reference. Make sure you read and re-read the section on setting up valve stem lengths, this is critical to getting the correct valve lifts without damaging the cam and followers.

http://www.pumaracing.co.uk/pinto.htm

[Edited on 1/11/06 by MikeRJ]

theconrodkid - 1/11/06 at 07:55 PM

why not go zetec with throttle bodies and megasquirt?more power and cheaper and the lump is lighter as well

robertst - 1/11/06 at 10:41 PM

yeah.. i'll someday pop a better engine in (my pick is either a merc engine or a bmw one...6 pot... but that is waaaay in the future). for now i want it simple and purely noobie stuff and the pinto is best for that.

so bike carbs are good for the job then? i heard of them here, but i dont know how they compare with 45DCOEs...

just to start looking: carbs from a ZX9r? any other one? and two of them?

i read and reread zillions of times the articles in pumaracing, but i found the book a bit mroe helpful.. it told me what to get for road performance, what to get for rally, and what to get for racing whereas the articles on pumaracing seem to be focused mainly on power power power, "get the most juice out of that pinto!"

MikeRJ are u sure the 98bhp is not the wheel hp?

robertst - 1/11/06 at 11:09 PM

ok it seems bike carbs are the way to go...they are cheap!
i guss the most common are R1, ZX9r and GSX600?

isnt it really difficult to manage equal mixtures in all cylinders as i understand its one carb per cylinder?

would bike carbs with 40 choke size be ok?

MikeRJ - 2/11/06 at 09:57 AM

quote:
Originally posted by robertst
just to start looking: carbs from a ZX9r? any other one? and two of them?


Four of them! One per cylinder.
quote:

MikeRJ are u sure the 98bhp is not the wheel hp?


Absolutely 100% sure. In standard form the Pinto is very torquey, but sadly lacking in power compared to modern 16v engines. Still enough to make a locost pretty quick though.

[Edited on 2/11/06 by MikeRJ]

flying_coffin - 2/11/06 at 05:44 PM

I'm guessing the jets and needles will need to be altered to suit the Pinto?

Is this a simple case of a swap out or will there be some machining involved ??

flak monkey - 2/11/06 at 06:03 PM

IIRC bike carbs need the jets drilling out to suit a pinto. People like Bogg Bros can do the work for you and supply a manifold.

If you want to know what you need for 150bhp, look at the spec for this engine from Vulcan

http://www.vulcanengines.com/brochure/index7.htm

David

jacko - 2/11/06 at 07:36 PM

quote:
Originally posted by robertst
ok it seems bike carbs are the way to go...they are cheap!
i guss the most common are R1, ZX9r and GSX600?

isnt it really difficult to manage equal mixtures in all cylinders as i understand its one carb per cylinder?

would bike carbs with 40 choke size be ok?
Hi yes 40mm chokes bike carbs are spot Jacko