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Registered
Join Date: Nov 2003
Location: United Kingdom
Posts: 524
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73T - Bob Watson Rolling Road - Base Run
I had planned for some time to get the 911 over to Bob, as I had read good reviews here, and knew that Tuthills took their cars there as well.
So, with the sun shining, I took the pleasant cross country route from Stratford over to Middle Aston. Bob is a really nice chap, willing to explain and spend time as required. I explained to him that I wanted a baseline run, so that I could check the overall condition of the engine, and gain advise on any tuning etc. that may be required at a separate session. Whilst James (Hot66) posted of his 198bhp from his 'S', I am happy to post a healthy 140bhp baseline from my 'T'.   The picture of the computer screen is in Kw and Nm, so in old money, Bob converted that to :- 140 bhp @ 5830rpm 134 ft/lb @ 4380. There is a nice flat torque curve (can you have a flat curve Smile ), that he suggested would make for a good rally car. The following observations were found, and I will return for a tune up and an updated post in due course. - the 10bhp over stock is really down to the SSI Heat Exchangers - speedo reading 60mph at a true 53mph (later electronic version ?) - tacho reading 4,600rpm at a true 4,000rpm (cannot work that one out) - idle jets too rich so using more fuel that needed. - a general tune up will see 150bhp - roll on the next visit. Finally, there is a short video of the dyno run here :- http://uk.youtube.com/watch?v=6HRcg3c0WUc Ian
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Ian Highfield 1992 964 C2 Manual with RS Suspension etc. 1973 911T Narrow body Hot Rod with 2.7 Carrera engine and loads of period modsl - SOLD 1986 Carrera Coupe Sport with Stainless Silencer and SW Chip (256 fwbhp) - SOLD |
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08-01-2007, 02:19 PM
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Bug Eating Member
Join Date: Jul 2007
Location: A swamp near you
Posts: 2,068
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"would make for a good rally car"
Yes, that's a great idea. 
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08-01-2007, 02:47 PM
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Registered
Join Date: Jul 2003
Location: Glorious Pac NW
Posts: 4,184
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Quote:
Ha! Right underneath your leftmost bumper overrider in that first photo, you can see the scorch my wastegate pipe left when I went in June to check my AFR's. Freaked me out at the time - looked around because I realised the room was filling with smoke, and noticed almost the entire exhaust system casting a bright orange-yellow glow from under the car... Bob was just amused - probably at my agitation, I think.. Nice looking longhood you have there.
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'77 S with '78 930 power and a few other things. |
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08-01-2007, 05:09 PM
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