48 replies to this topic

[James]

A TR5 is a 150 cam

[HJN1963]

James, on 05 February 2012 - 07:01 PM, said:

A TR5 is a 150 cam

Even better I have only two cams to look out for
Thanks
Hugh

[HJN1963]

Can some one say do I need to get a twin choke cable please

[toofast2race]

HJN1963, on 05 February 2012 - 07:30 PM, said:

Can some one say do I need to get a twin choke cable please

Theory says you need one - practice says that once you have started it on "choke" - really metering unit enrichment - and blipped it for 30 secs (to get it on all six cylinders ) you can pretty much put the choke in completely and it will idle Ok at 30secs and just fine after a minute or so . The fast idle set up on a PI is a pain in the arse - I have never had it in over 20 years of PI's

Idle is generally a bit rich on PI's which must help and if you set the airbleed to give a ~900rpm idle it will get just enough air when cold - if you the kind of person who wants it to idle like a modern car from cold - forget Lucas PI

[HJN1963]

Thanks Andy no I want my Pi GT6 to be raw and as far from a modern car as I can one more question please Andy is it a must to use the Pi air box or can carb trumpets be used instead.
Cheers
Hugh

[toofast2race]

Airbox makes filtering air and supplying it cold a lot easier - individual trumpets with foam filters sounds bonkers but what you gain from the trumpet (45 DCOE btw) you probably lose by putting a foam sock on. There is considerable debate about the airflow ability of the original air trunk but its good for at least 170bhp - I would use the original (it has ram pipes) if you have it and then run a large flexible pipe to a decent remote filter

[HJN1963]

Thanks Andy yes I have the original air box so I will use it thanks

I started to respray the car while the engine is out I have stopped due to my hand op and the cold weather it's going to be painted in satin finish gun metal grey So I only have the engine bay done.

[Nick Jones]

Just a thought on the cold idle front. Absolutely no reason why you can't use one of those thermoelectric valves from the K-jet system. Just provides a metered bypass of the throttle(s). Works from engine heat (to prevent high idle at warm/hot start) and has a heater element in it to make sure it doesn't hang on too long from cold. Just needs a 12v ignition switched supply. Early K-jet Volvo 240 works well - has a short duration. Use these on both my EFIs - no ECU involvement.

I'd also use the original airbox with remote filter as Andy suggests - it's a decently engineered thing and that way you'll get cool air into the engine.

Nick

[HJN1963]

Nick Jones, on 05 February 2012 - 10:30 PM, said:

Just a thought on the cold idle front. Absolutely no reason why you can't use one of those thermoelectric valves from the K-jet system. Just provides a metered bypass of the throttle(s). Works from engine heat (to prevent high idle at warm/hot start) and has a heater element in it to make sure it doesn't hang on too long from cold. Just needs a 12v ignition switched supply. Early K-jet Volvo 240 works well - has a short duration. Use these on both my EFIs - no ECU involvement.

I'd also use the original airbox with remote filter as Andy suggests - it's a decently engineered thing and that way you'll get cool air into the engine.

Nick

Thanks for the info for the K-jet Nick it's something I will fit to my car and I use the original air box too
Cheers
Hugh