Wtf!!??????? Mpg?

Right, 4.3 is up and running taken it for a few gentle runs not exceeded 2500RPM, ok a couple of times at full throttle, and I reckon its about 8MPG!!!!!!!!!!!!!!!!!!!!

Enigne is running a little rich granted, and tuned (stage 3 heads, stealth cam, weber 500 - roller rockers etc...)


Is this taking the p1ss?
Much are you getting from yours?

From my standard 4.2 - 14 to 19 on a run , 9 if I`m annoyed

mine is currently just evaporating as its got a hole in a fuel pipe so 0mpg lol


you probably just need the carb tunned

Std 4.6 anything from 22 to 10 normally around 17

Same as Mogwyth...low as 10, high as 22 but averages 17!

round town they are only about 7-13 , if its running rich its amazing how much they can consume.

before we set up the carbs on the gas analyzer i reckon I did a tank in 50 miles lol

My mates mkII jag 3.8 just did half of both tanks in one run of about the same , hes borrowed my colourtune and carb ballencer today

24 on a run 6 when thrashing and the best it has done when towing is 357 miles to a tank with a 1.5 ton trailer behind me all the way to scotland in feb

If I'm heavy on the loud pedal about 8mpg but have managed to get 20mpg on a long run.

Ingition was not advancing enough (used half vac on carb, now on full vac), and pump jet on carb was set on maximum - both changed now much, much better!!!!

good mate, Ill have two

what power you expecting to make, 250hp?

400 please

fett said:

400 please

Click to expand...

forced induction lol

or a bmw engine

POAH said:

what power you expecting to make, 250hp?

Click to expand...

Target was 300bhp, Done alot to get there:

High ratio roller rockers (Titan motorsport red)
Stage 3 heads - tripple ground seats (10 bolt)
comp ratio 10:1 decked block
ported inlet manifold
TVR 4.3 crank fully ballanced
V8 developments stealth cam
double valve springs
vernier pulley

...But Due to block hugging manifolds been quite poor... I recon around 280 (ish)

Goes like a riot..... Especially with drum brakes and leaf springs!!!!!

check out:

[nomedia="http://www.youtube.com/watch?v=tun8Gzb72Og"]YouTube - ‪4.3 TVR Lump in a 1973 series Landrover‬‏[/nomedia]

pornstarmax said:

Target was 300bhp, Done alot to get there:

High ratio roller rockers (Titan motorsport red)
Stage 3 heads - tripple ground seats (10 bolt)
comp ratio 10:1 decked block
ported inlet manifold
TVR 4.3 crank fully ballanced
V8 developments stealth cam
double valve springs
vernier pulley

...But Due to block hugging manifolds been quite poor... I recon around 280 (ish)

Goes like a riot..... Especially with drum brakes and leaf springs!!!!!

check out:

YouTube - ‪4.3 TVR Lump in a 1973 series Landrover‬‏

Click to expand...

You can't have your cake and eat it mate.

what you revving too?

pornstarmax said:

Target was 300bhp, Done alot to get there:

High ratio roller rockers (Titan motorsport red)
Stage 3 heads - tripple ground seats (10 bolt)
comp ratio 10:1 decked block
ported inlet manifold
TVR 4.3 crank fully ballanced
V8 developments stealth cam
double valve springs
vernier pulley

...But Due to block hugging manifolds been quite poor... I recon around 280 (ish)

Goes like a riot..... Especially with drum brakes and leaf springs!!!!!

check out:

YouTube - ‪4.3 TVR Lump in a 1973 series Landrover‬‏

Click to expand...

POAH said:

what you revving too?

Click to expand...

Rev limiter set at 3000 at the moment but trying not to go over 2000, done around 300 miles now so will start to wind it up a little....

good fun but a pricey route no doubt?

fett said:

good fun but a pricey route no doubt?

Click to expand...

Yep engine only £5K next one is one of these:

LS376/515 :: PartsWorld Performance :: GM Parts World