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Poor performing PINTO
Tinks1 - 22/6/10 at 12:35 PM

Hi Guy's
looking for any help on a poor performing Pinto 2L. I have set the timing as per the Haynes manual at 6 deg BTC for un leaded this gave really poor performance so changed in steps to 10 deg BTC and now slightly better but not brilliant. Tried checking for vacuum leaks by spraying WD40 onto the hoses and manifold joints to see if i got an increase in revs but nothing. Checked cam is set correctly with crank, checked valve clearence and plug gaps both OK, fuel mixture seems OK set at 1% on CO2 analyser, plugs look correct colour So any suggestions would be helpful

Cheers
John

coozer - 22/6/10 at 12:44 PM

Put a zetec in.

BenB - 22/6/10 at 12:45 PM

quote:
Originally posted by coozer
Put a zetec in.


And there was me thinking we should move the car into the BEC section

MikeRJ - 22/6/10 at 12:56 PM

Has it got an old points based distributor or electronic? If the former, have you double checked the points gap/dwell?

flak monkey - 22/6/10 at 02:29 PM

It would help if you said what the actual problem was....

Poor performing how?

scoop - 22/6/10 at 02:31 PM

Mines set at 12 deg. TDC not BTC. Could that be it?

Tinks1 - 22/6/10 at 02:56 PM

The main problem is a flat response especially at 4000 rpm +

FASTdan - 22/6/10 at 03:27 PM

is it on carbs?

mcerd1 - 22/6/10 at 04:03 PM

from his archive it looks like he's on a single downdraught carb....

flak monkey - 22/6/10 at 04:07 PM

If you are on a single down draught thats your problem. Especially if its a 32/36DGAV.

Some improvement to be had with a 38DGAS if you can find one.

Ignition advance should be set at 8-12 BTDC with standard cam and should be all in, 34-38deg at 3500rpm upwards.

omega0684 - 22/6/10 at 05:13 PM

give me £1100 and you can have my pinto, which doesn't perform poorly!

britishtrident - 22/6/10 at 06:16 PM

Centrafugal Mechanical advance ?
The advance mechanism might need lubricated and freeded off .


Also have you cleaned the carb jets ?

David Jenkins - 22/6/10 at 06:20 PM

quote:
Originally posted by flak monkey
If you are on a single down draught thats your problem. Especially if its a 32/36DGAV.


My DGAV gave me excellent performance - they've well suited to a mildly warm road cam. Unfortunately they do get old, seals and diaphragms decompose and leak, and so on. When mine was working properly I could squeak my tyres in 3rd gear! It is worth losing the automatic choke though (making it a DGV).

They have some advantages too - they can be tuned by almost any rolling road or back-street tuner.

I decided to go over to bike carbs when mine started to leak, and I saw the cost of a new replacement DGV.

[Edited on 22/6/10 by David Jenkins]

mcerd1 - 22/6/10 at 07:24 PM

quote:
Originally posted by David Jenkins
I decided to go over to bike carbs when mine started to leak, and I saw the cost of a new replacement DGV.

can't you get a service kit ?

DRC INDY 7 - 22/6/10 at 07:40 PM

I can sell you my brand new 500 mile old 32/36 dgav manual choke version

David Jenkins - 22/6/10 at 09:24 PM

Service kit - yes, they are available. They don't include everything that gets old though. Mine ended up dripping petrol near to the distributor cap...

Modern replacement? No thanks, I like my bike carbs!