concours1

Best way to tune 2.0 ohc. Got 205 sierra inj engine. (1) what bore size/pistons(2) conrods cosworth/1600 diesel (3) head buy big valve or port inj head(4) any other mods. Dont want a silly engine something that produces good power from 2500rpm going in a robin hood kit car any help would be great

john_p_b

iTrader: (4)

have you tried the rhocar forums or locostbuilders.co.uk? I've got a fairly tame 2.1 pinto with a fr32 cam in my indy and it's not shy due to weight

tabetha

I really wouldn't worry about the issue of lack of low down go, as your car will be so light.
Leave the port size alone, opening up larger will slow air speed, which is not what you want, keep the inj head, Roland(the mad professor) at HT racing is a god of Pinto, he's done some for me over the years.
The usual route with 2l pinto is use +90 v6 cologne pistons and over bore to 2086cc, you can keep all the std internals just use arp rod bolts and flywhel bolts, lighten the flywheel, you don't need to keep a heavy one in your car, this alone will make a surprising difference in terms of cost/result, use a piper or kent, newman fast road cam, anything hairier will lose bottom end, but really not an issue in your car.
I assume you are keeping the std ecu ?
What is your power goal ?
tabetha

concours1

Thanks for the info guys, not using injection system got hold of a pair 40 webers and a very short manifold 1" deep. How much can be taken off flywheel, or what should it weigh when machined I have a lathe so thats no problem. Have read so much on getting the camshaft geometry right ie valve heights which then alters the angle the rocker hits the camshaft at, any info on this? Was hoping for around the 150bhp mark or is to high on driveble engine

tabetha

It'll piss 150 on 40's, assume they are 34mm chokes/venturis ?, you'll be looking nearer 165-170.
With a fast road cam, the only thing you will need to watch for is coil binding on valve springs and make sure you get/use the extra long posts, otherwise they can rip the ball studs out the head, try to get long pad followers, and if you can get your cam reprofiled, as it has already been work hardened due to age/use, I have never in 25+ years had a reprofile fail but have a few new cams.
The amount to take off the flywheel for your car is as much as is safe, not sure the weight of a pinto f wheel, a cossie one was 8.9KG, this was machined down to 6.6KG, as it's a cossie one I didn't slot it, but you could for yours without problem.
You will have to sort out a different ignition system, I would go back to clockwork, but with hall sensor trigger, that way easy to adjust advance retard curves diy, takes a days messing but easy, to get a lot better than a stock iggy curve, the ultimate would be a mappable system, but depends on budget.
A 1" deep manifold will be interesting, tuned length on carbs esp make or break a engine, and I expect this is way way to short by a long way, and will cause problems with some set ups.
Just make sure you use some decent filters.
I would use a felpro blue HG, never had one go pop myself, despite the abuse!!
The pinto is a ace lump, as is the X flow 1600 etc and evenb better the 2L X flow, yummy.
tabetha

CombatSapph

If you want some ideas of what can be done to a Pinto check out my website @ http://web.bethere.co.uk/amigafan2003/

or the engine section specifically @ http://web.bethere.co.uk/amigafan200...neexhaust.html

RR'd @ 171bhp and still pulls from 1500rpm.