tyre pressure

[TRJIMBO]

I have a FHC V8 running on 15inch minilites shod with 195/55 tyres.

I keep them inflated to 33psi. I don't know why, I just made up a figure that looked about right, I can't refer to a hand book because they are non-standard. Any ideas what PSi I should I inflate them to for good fuel efficiency on the road?

[busheytrader]

I run 28to30psi for both 195 60 14 and 195 50 15. Personally I prefer the 60 profile for handling, comfort and aesthetics.

fuel efficiency , V8 wedge? I think tyre inflation will be white noise on your mpg graph -negligible. Ignition, carb settings and your right foot will have a much larger effect on mpg but smiles per mile with a V8 is priceless.

Adam



TR7 V8 DHC Jaguar Solent Blue. 9.35cr Range Rover V8, Holley 390cfm, JWR Dual Port, 214 Cam, Lumention, Tubular Manifolds, S/S Single Pipe Exh, 3.08 Rear, 200lb Spax & PolyBushes all round, Anti- Dive, Strut-Top Roller Bearings, Capri Vented Discs & Calipers, Braided Hoses, 4 Speed Rear Cylinders, Uprated Master Cylinder & Servo, AT 14" 5 Spokes or Maestro Turbo 15" Alloys, Cruise Lights, S/S Heater Pipes, Replacement Fuel Tank. No Door Stickers. Mine since July 1986, V8 from 1991 courtesy of S&S V8 conversion and big brake kits.

[TRJIMBO]

Thanks for that. I noticed since I've had a weber fitted that my right foot sinks deeper to the floor. I'm getting 33mpg on a run out. I'm measuring urban driving this week. I have a feeling its going to be about 14. Like you say, it's a great laugh though.

[busheytrader]

Wow!

33 mpg was about the best I got with the 2.0L engine on a run when it was my daily driver back in the day.

[Hasbeen]

I run 28/30 in the 7 & the 8 on 185 70 13/205 60 13 on the 7, &
195 60 15/215 50 15 on the 8,

I get 30 MPG from the slightly uprated 7, & 29 MPG from the hot as hell 4.6L in the 8.

Interestingly I get between the 2 from my 250 BHP Honda S2000, & about 28 MPG from my Ozzie Ford Capri, with it's Mazda 1600 100 BHP engine. Size or power doesn't appear to have much effect on my fuel consumption.

Hasbeen

[TRJIMBO]

Well as Busheytrader says, it's all about the right foot!

I don't remember what I got from my old 2 litre. It seemed to run on a mixture of petrol and water. I know it pulled fairly well when driven right. I reckon the 2 litre must be a lot better around town