Thread: What now?

Originally Posted by c.h.i.e.f

The gear ratio isnt the best I must say its all standard im pretty sure but theres a few things that are strange 1.first gear seems a tad to high on takeoff compared to defender lt77 or R380 2.but on other hand 1st low range seems slower than anything known to man (excluding mogs of course) 3. 5th gear on say about 100km/h seems like,to many revs but cannot say due to no tacho !
It all comes down to revs and gear ratios between the fenders and isuzu's harder reving fenders feel more impressive but then there's a hill !

Sounds possibly like you may have 1.2:1 high range. The 110 my engine came from was factory fitted with 1.222:1 high range and LT85. It was quite revvy on the highway in 5th consequently saw a few tall tyre combinations to rectify this, it was a NA engine too

The engine is now turboed/ intercooled and in my vehicle, I have a 4 spd with .996:1 high range, and 33" tyres. I am very happy with the gearing except 1st is too high at times, and reverse requires lowrange to back a trailer. The key to these engines is to keep the revs down, it is amazing that peak torque is down around 2000rpm, the performance seems like it drops right off around 2900 to 3100. If you are running 31" tyres and 1.2:1 highrange, it is possible you have gone through that optimum torque band by 100Km/h.

With the LT95, low range is even lower at 3.3:1, my 1st low is sometimes toolow, have to accelerate down hills to avoid a traffic jam

If I hold my foot flat, it'll reach the fuel rack stops at around145 km/h

I agree, not many Tdi's or Td5's will keep up on hills

JC

Ha dougal your figures would be slightly better than a 110 due to weight and a bit better through the air less brick like.

I have never timed mine but can only say what I have actually seen myself, not second hand info or come from a friend.

Drag race was a tongue in check comment Simo seeing we where talking about power, I plan on getting the car on a dyno next year once I all tweaked out.

Thanks justin well on that note would it be worth putting some 33's on there and see what it does ?

Originally Posted by lambrover

Dranged- I have a barrel type water to air intercooler it's 2.5inch inlet/outlet

I remember you posting that you had ordered this from the US. I'd be interested in the details such as type of ic and pump etc, how difficult I was to fit, and how much a difference it made to power and torque.

Originally Posted by lambrover

Ha dougal your figures would be slightly better than a 110 due to weight and a bit better through the air less brick like.

I have never timed mine but can only say what I have actually seen myself, not second hand info or come from a friend.

Drag race was a tongue in check comment Simo seeing we where talking about power, I plan on getting the car on a dyno next year once I all tweaked out.

Yes aerodynamics on the rangie have to be a little better. But I'm 2.3 ton empty, usually 2.4 ton with me and some gear inside. What does an Isuzu powered 110 weigh?

Depending on what size intercooler determines how easy it is to install! Mine is 600x300x3" with 2.5" outlets so it was a major job to fit in im thinking about giving it a test by disconnecting the intercooler and putting in a temporary crossover pipe

the intercooler is from frozen boost in the states, from memory it is 13in long 3in wide and 4in deep. I have made some mods to make it fit, the barrel sits where the air cleaner is surposed to go, the air cleaner is one from a Isuzu truck that I cut in half and rotated it by about 90 degrees and got a reducer from an exhaust shop to go from 4in into 3in as that is the size of my snorkel.

I have mounted the intercooler radiator top mount style in the bonnet, reasons why- (I already have AC sitting in front of the radiator) restricted air flow would cause more stress on the cooling system under extreme conditions, when air flows through the IC radiator it is absorbing heat, that heated air goes past the AC (now not as efficient as the air is hotter) and onto the radiator so the air flowing over the radiator is not only reduced but hotter as well.

So my thinking is it is better to have a functioning cooling system with slightly reduced intercooler efficientcy.

the power- around town I really notice a difference, ( I have a digital themometer with two probs, positioned out of turbo and after the cooler) I am achieving a temp difference of 80 degrees but with sustained boost on the high way 10psi only getting a difference of 24 degrees.

One cause of this problem could have been the position of my big light force spotties, I have done some work on the county in the last couple of days, clutch and wiring up a winch and changing the mounts for the spotties to get better air flow onto the IC radiator, it's all done but car is still in the shed for a couple of days of maintence before I go to brissy.

Originally Posted by lambrover

... it's all done but car is still in the shed for a couple of days of maintence before I go to brissy.

We should have a custom Isuzu turbo intercooled Defender day out while you're here In all seriousness though it would be good to see another set up and compare its performance.