Cheers thanks a million, chuffed! When I get a chance il scan the printout and post it up, I don't have it to hand at the moment but think it was between 150 and 155 at the wheels, which I think is a little low because I had chunky tyres on the back which I never got a chance to change.
The curve from 2900 or so on is really strong, no flat spots or dips.
Thanks again for the kind words 🙂
One more question I forgot to ask, did the carbs require much in the way of jetting to get the mixture correct?Originally Posted by onecamohv
From back in the day when we were Road Rallying the Pinto engine anything over 150bhp @ the wheels was deemed a very good engine. There never seemed any conversion factor then for flywheel horse power, it was all about what someone had at the wheels.
i remember back in the day dave walker saying he knew if an engine was going to be good if he saw 110@ the wheels @5000 rpm. only trouble is even a few psi change in tyre pressure changes power at the wheels!
Or an air temp. sensor in a mug of warm tea! LOL, never seen THAT one used!
Great results, I'm doing a similar engine for my rally escort... I'm waiting to have the vulcan gp1 head delivered (going through damn customs).
I'm hoping to see between 170 and 180bhp, with 11.2 CR and RL31cam, 44idf carbs, bestek ignition, most important thing will be to have the engine ready at 3-4k rpms.
I have a doubt regarding jetting, now I'm on 36 chokes, 160 mains, F19 emulsion tubes and 200 air, would it make sense to try 38's with bigger jets? or different emulsion tubes?
I also have a very similar engine spec but non injection head breathed on by graham on here .! Unfortunately it’s still sitting on my dining room table.😩
I can't think of a better place for it, well, except maybe an engine bay...
i do not think 38mm chokes will work properly in 44 IDFs because they are so close to the internal diameter of the carbs
Excellent, im not sure that almost 85lbft per litre torque is achievable on 2.0 pinto but a great result none the less
Last edited by Graham; 10-08-2022 at 07:15.
thanks Graham, what do expect if so ? RR operator is highly regarded in the business for many years, and not for chasing numbers. Moreso giving people a reality check! used also by alot of one make race series here for compliance checks. Either way, im not chasing numbers either, as i said in my previous post, i would have been happy to see 170+.
As the same business did the machining for me, he rekoned the tight tolerences i held with getting the squish perfect on each cylinder and the CR, and good headwork paid off. i was running pump fuel with NF booster.
Either way, regardless of numbers, im chuffed it performed so well, and he does alot of pintos - and couldnt recall one that pulled like it from 2700-4500 or so
heres the graph, quite new recently calibrated top of the range MAHA inbuilt unit, not a hub job.
ps. its 2045cc
P.s Sincere thanks to everyone in this thread for the advice along the way as i was fairly new to Pinto's and what makes them tick, what a great communitythanks!
That's a great result. I'd be well happy with that too.
Just out of curiosity, how comes your Mk2 has an early Mk1 pointy heater bubble/plenum?
Last edited by rallyrob; 10-08-2022 at 11:39.
cheers rob
ah as you can see from the tape on the grille, i had a rusty/leaky bubble recently, so while the engine was out i repaired the inner bulkhead and put on a new bubble - it was the only one in stock and its something that wouldn't ever bother me on this type of car i was more concerned about getting the best fitting one!
It’s about time you had some smoke coming out of the chimney of that engine Alan.
what ever way you look at it the numbers are good, a few lbft here or there is nothing.thanks Graham, what do expect if so ? RR operator is highly regarded in the business for many years, and not for chasing numbers. Moreso giving people a reality check! used also by alot of one make race series here for compliance checks. Either way, im not chasing numbers either, as i said in my previous post, i would have been happy to see 170+.
As the same business did the machining for me, he rekoned the tight tolerences i held with getting the squish perfect on each cylinder and the CR, and good headwork paid off. i was running pump fuel with NF booster.
Either way, regardless of numbers, im chuffed it performed so well, and he does alot of pintos - and couldnt recall one that pulled like it from 2700-4500 or so
heres the graph, quite new recently calibrated top of the range MAHA inbuilt unit, not a hub job.
ps. its 2045cc
ive never seen more than 82lbft per litre from any 8v n/a engine, but that doesnt mean it cant happen or you didnt get it.
some engine do better than others for no apparent reason. ive seen 200bhp from an rl31, but ive also seen what should be fairly good engines struggle to get past 170. A few weeks ago took a standard 2.0 bottom end fitted an old old burton head which was fitted with valves way too long for a modern cams, on a coltec rally cam whilst blowing loads of smoke out the breathers, it made 168bhp!
Yeah I'd believe that, seen those kind of weird things over the years. Many moons ago when we were involved in fiat ritmo/uno racing, there was a front running engine nicknamed smokey Joe. Many times the scrutineers had it apart, and nothing ever found. It smoked like a chimney, and nothing could match it's legs.
I also had a Toyota 4k 1300 in a rwd starlet years ago. I took the engine out of a car lying in a field upside down, and the guy I got it off said his young lad overheated it until it stopped many times driving it around Fields. I dumped the engine into a car with a hot rod cam and a set of carbs, and it's still going to this day without being opened. Not even a head gasket . It's an absolute flier.
Engines.... Odd beings! I believe there's always a reason though, as unapparent as it may be deep down.
Like in the case you speak about of an apparently good engine not hitting 170, that could be alot of small things if all the obvious things seem on point. Valve geometry, ring tension, main line out of square, crank ground from the factory with offset big ends, rod twist, etc
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