Quote:
Originally Posted by qscgyjl
Digging deep into the memories here!  The engine was a 2ltr, the GM carb, inlet and head went in the bin and a fresh engine built with a 1.9 inlet, big valve head, new 38DGV and Piper cam. Ignition is hazy, there were a few combinations, most likely being Lumenition in a resprung 1.9 dizzy. A Holbay cam went in shortly after. The flat spot could be driven round easily, it was more of a hiccup. The progressive linkage was a trial that gave way to EFi then a V8. The other engine was a friends 2ltr with a Granada 38DGAS we filed the butterflies on to alter the progression timing. The joys of tuning on a budget!
Were you racing your CIH? |
I kept the 2.0 inlet, removed the studs from where the GM Varajet went on, drilled and tapped the manifold to the Weber pattern and reused the original studs for the 32/36DGEV.
That started life as a 32/36DGAV but i converted it with a Weber electric choke, obtained the jettings for the standard conversion and the jets at cost from a mate who worked in a carb specialist/rolling road place as at that time my commute was fairly long and the unreliability of the Varajet and poor economy were painful on the wallet.
I didn't set out to intentionally tune it, it was more that when bits wore i replaced them with tuning bits and the cam went next so in went a Piper Magnum 285/2 cam with solid lifters and a stepped plug in the head to increase the residual oil level, meaning the cam always had oil wash lubrication.
The downpipe went next so a Jetex 2" downpipe went on merging into a 2.5" outlet then the rest of the system changed to a Janspeed 3" skidded system.
Then the 32/36 didn't give enough flow especially at the top end so the 38DGAS was sourced, rejetted and converted to electric choke.
Ignition was more or less standard but running at ~11deg BTDC instead of the standard 5deg BTDC. Get the ignition timing even half a degree out and it was flat as a fart and sounded like one as well. Get it spot on and changed into a snarling beast that happily left Manta 2.0 GT/Es standing and on one occasion, left a 3.0 CDi (12v) Senator floundering in the weeds. That was the closest i came to racing and the wrong car to do it with, underneath that solid blue paintwork lurked some disco lights!
Never had it on the dyno but estimates from the guy i got my cam and other tuning bits from and my own experience suggested ~160-170bhp.
Can't remember the full spec, think there were a couple of other bits thrown into the mix but it was a very quick beast.