[TR] [6pack] Lucas PI

Keith Stewart keithstewart at bell.net
Sat Aug 31 12:38:42 MDT 2019


Great information John. Succinct and to the point. Worth filing away in case I ever have to redo the engine in Chris’ TR6.

 

 

Keith Stewart

keithstewart at bell.net

 

 

 

From: John Macartney <John.Macartney at Ukpips.org.uk> 
Sent: August 31, 2019 11:52 AM
To: Andrew Uprichard <auprichard at uprichard.net>
Cc: triumphs at autox.team.net
Subject: Re: [TR] [6pack] Lucas PI

 

If all you want is an injected TR performance, I’d do this. Buy a us spec car.

 

TR5 camshaft, still available in U.K. and a bit better too than the original. Shave the head to at least 9.5:1, fit flat top pistons, a Lucas D25 or 26 dizzy, the equivalent of the SAH 6-3-1 extractor exhaust manifold, two 1.75 SU carbs and bingo, you’re there. Ideally, if the donor car is a late model 6, email Chris Witor in the U.K. for a 215019 head. These didn’t go to the US but we’re the best heads of the lot. Chris will confirm this and he’s a Triumph performance specialist. Goes without saying you’ll need anoverdrive. J type is ok but A type better imho. You’ll then have a car that is the injected versions performance equal in every way. These things are what we do in the U.K. to all 250s and carbed 6s that find their way back here. Good luck

 

Jonmac

Whenever I feel the need for exercise, experience has shown me it is better to lie down until the feeling goes away. WINSTON CHURCHILL


On 30 Aug 2019, at 15:43, Andrew Uprichard <auprichard at uprichard.net <mailto:auprichard at uprichard.net> > wrote:

Thanks, Jonmac:  I don’t have the car yet – and in fact am still going back-and-forth about whether to buy it.  I’ll keep you posted !

Andrew

 

From: John Macartney [mailto:John.Macartney at Ukpips.org.uk] 
Sent: Thursday, August 29, 2019 6:50 PM
To: Andrew Uprichard
Cc: Triumphs; 6pack at autox.team.net <mailto:6pack at autox.team.net> 
Subject: Re: [6pack] Lucas PI

 

Can I help? Did the Lucas Service course, thefactory service course and owned a saloon with the pi engine to full U.K. police performance spec. Doubt you’ll find too many in the US with experience of the system. PI cars were never sold in North America in the day, though a very small number have snuck in since then. A word of advice. If you’re tempted to fiddle with the PI system, put everything you’ve learned about carbed cars entirely to one side. The Lucas system is a whole different ball game with very unique rules. That said, it’s a great setup but you need to know what you’re doing before you start:)

 

Jonmac

Whenever I feel the need for exercise, experience has shown me it is better to lie down until the feeling goes away. WINSTON CHURCHILL


On 29 Aug 2019, at 22:20, Andrew Uprichard via 6pack <6pack at autox.team.net <mailto:6pack at autox.team.net> > wrote:

Who is the go-to guy in the US for questions on the Lucas PI system?

 

Andrew Uprichard

Jackson, Michigan

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