I have a set of twin dcoe 40's on my 2ltr pinto. Bit of head work not big valve, newmans ph4 276 deg it's made 178bhp apparently although I'm not so sure I thought it might make 155 maybe,
currently
idle 45f8
tube f11
145 main
180 air corrector
32mm chokes
32 deg full advance on ignition
i think it's got 175 needle
this is was what motoscope did when they tuned it.
cars done about 1000 miles.
only 2 days after motoscope tuned it I took it to donnington park on a track day,
i found that that in 5th gear on the straights it was hesitating almost like a rev limiter, It felt like fuel starvation, I went into the pits and turned the fuel pressure regulator up a little, (regulator was set by motoscope) this appeared to sort it that day,
took on the car out for the 1st time in a while this weekend as I've a drift day booked and booking a track day tonight, it has a hesitation if I give it full throttle between 2000 and about 3000 befor and free if fine, I checked the carbs and they had come out of balance so unbalanced them up but it's still not right although it is abit better
also after a standing start to flat out it feels to pull well in 5th and then just sort of gives up like there's not enough fuel (or air) and I've noticed it's not popping and banging like it did, well doesn't really at all now. All the idle mixture screws are set to 3/4 turn out but that's how motoscope left it as far as I know.
ive had all the jets out and there all clean ect, think I'm Gona need a trip to a rolling road to see how it's feeling, either that or nick my dads afr gauge out of his Renault 5 gt turbo.
i did ask for a print out of the afr from the rolling road which I never got and he kept avoiding for some reason.
just looking for some advice on if it's a tuning issues or if the carbs are to small, the tuner recommended 45's and 36mm chokes he's was complaint that the 40's were had to set up.
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