I don't know where to start... first can someone explain the role of the EECIV and EECV, which E series had what on them... are they interchangeable at all?
Next.. are there any aftermarket 4v heads for the E series sixs? if so how much do they cost and is it worth it?
What are some of the cheapest quickest easiest ways to gain some extra Kw from the E series? what are some of the more expensive?
say you have a 4.0 litre six..... how far can it be bored and stroked and how many more litres can u expect to get from it?
Does anyone kow a site which explains what the gear ratios and diff ratios are? all i see is 3.5:1 and stuff like this.. i have no idea what this means.
Lastly (for now) how much power can be pumped from a 4.0L while keeping it naturally aspirated as well as cost efficient. eg not spending 40k on it
Main difference was the EECV is able to control a BBM (Broad Band Manifoldm, has long and short runners), were as the EA to ED had fixed length runners.
Diff Ratios are in simple turns the number of turns the wheels will do compared to the tail shaft, so 2.77:1 meand the wheels have done 2.77 turns and the diff 1 turn, so the high the number the more the wheels turn per tailshaft turn, hence the faster you can launch - strangley the high the number the lower the ratio so 3.45:1 is a low ration and 2.77:1 is a high ratio (that i know, why though I have no idea).
If you change the diff ration just bear in mind that the speedo will then be wrong, and a new speedo gear would have to be put in to correct the speedo, unless you change to a really low ratio like 4.11:1 in which case a little black box would be needed to convert the speedo signal as no speedo gear exists to correct for that ratio.
eafalcon.com has alot of specs that might help.
I did put something here, but it vanshied, I think
Other way round Dellboy. When the tailshaft has turned 2.77 times the wheels have turned once. So the lower the diff ratio i.e 3.45:1 means it is easier for the engine to turn the wheels, but this compromises highway rpm and top speed. So you have to figure out exaclty what you use your car for. There is no point putting in 4.11 diff gears in if you spend a lot of time travelling.
1992 AXII Telstar TX5 Ghia
121kW 2.5L DOHC V6 in a car that weighs 1100kg's and looks like a 4 banger from the outside......SLEEPER!
1988 EA S Pak 3spd CFI.....Soon to be a 250rwkw HSV eating machine.
no real point stroking the 4.0 six, there big enough. most people just get there 4.0l's mildly ported, cam and a decent exhaust. but id change diff gears to 3.45 LSD first. changing the Cam to an EF one is a cheap and easy mod (providing youve got a tourqe wrench) and the benefits wll be noticeable.
1994 COBALT BLUE ED FAIRMONT GHIA
Next Mod - T5 Manual Conversion
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