G
Guest
Guest
Rui
Do you really need that power at low speed? I'd be slightly scared at the prospect of using 200+ bhp cross-country! Or maybe you are into motorised bog-snorkelling?
My engineering experience has taught me that simplicity, and established solutions that are known to work, are always good; and that while trying new things is (usually) fun it is also (usually) expensive and difficult. Certainly if I were going to intercool mine, which I'd love to do, I'd pay Maarten in Holland a visit and get him to install his kit. He has done it before, knows what he is doing, and his solution is proven to work.
You are quite right that water will conduct away more heat, but isn't the simple and low-tech solution to that a water spray mounted on a conventional in-front-of-radiator air to air intercooler? I seem to recall that this is what rally cars use for short-term power boost. You could set that up for a few 10s of pounds or less.
As far as turbo lag goes, you would have to adjust the turbo anyway if you intercooled it, and the standard turbo setup on these vehicles is very conservative: for example mine doesn't really start to work until about 1800rpm. I very much doubt that a properly tuned setup would give worse turbo lag than you have at present.
The online pages on performance all suggest that a combination of large bore exhaust, intercooler, injection pump adjustment and turbo tweaks are the way to go if you want to boost performance. I *think* Maarten also offers the option of a different camshaft if you want still more power - you'd have to ask him.
The info I've read over the years suggests that you can raise the output of the 1HD-T to the 200 - 230bhp range without trying too hard. I've no doubt you could go beyond that, but you would have to start thinking about the other drivetrain components, and also the stress on the motor itself.
Sorry to be boring, but I really would go the "tried and tested" route with a FMIC, unless you are feeling very rich!
Christopher Bell (Typical "belt and braces" engineer)
Devon, UK
1HD-FT
|
|Hi all,
|
|I'm still interested in intercooling my 1-HDT 12
|valve. I already have a air/air core from a 15B engine
|(the same in Megacruiser) to be front mounted -
|although I haven't paid it yet. )
|
|For our Cruisers, I see this issue in the following
|way.
|
|Our options:
|
|FMIC - Front mounted intercooler (air/air) - like
|Maarten, Safari and custom mounts like the one I'm
|thinking.
|
|TMIC - Top mounted intercooler (air/air) - lot's of
|4x4 use this, Subaru use this (except for WRC, where
|the factory cars change it to FMIC...). I think it's a
|poorer design since it will certainly be heat soaked
|in real world use.
|
|So, the FMIC will do the trick. But!... Certainly will
|be effective at high speeds and probably will increase
|turbo lag due to all the piping. In slower speeds,
|it's efficiency reduces drastically.
|
|Wich leaves me to the million dollar question: what
|about a TMIC air/water intercooler? Sure it's more
|expensive, more complex and more prone to failure
|mainly because the circuit has more components. But
|for the slow speed offroading, wouldn't it work best?
|
|Water keeps temperature 37 times better than air, from
|what I read. For a big rig like ours wouldn=B4t it be
|our best choice?
|
|Thanks
|
|Rui from Portugal
|
|1HDT
____________________________________________________________
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Do you really need that power at low speed? I'd be slightly scared at the prospect of using 200+ bhp cross-country! Or maybe you are into motorised bog-snorkelling?
My engineering experience has taught me that simplicity, and established solutions that are known to work, are always good; and that while trying new things is (usually) fun it is also (usually) expensive and difficult. Certainly if I were going to intercool mine, which I'd love to do, I'd pay Maarten in Holland a visit and get him to install his kit. He has done it before, knows what he is doing, and his solution is proven to work.
You are quite right that water will conduct away more heat, but isn't the simple and low-tech solution to that a water spray mounted on a conventional in-front-of-radiator air to air intercooler? I seem to recall that this is what rally cars use for short-term power boost. You could set that up for a few 10s of pounds or less.
As far as turbo lag goes, you would have to adjust the turbo anyway if you intercooled it, and the standard turbo setup on these vehicles is very conservative: for example mine doesn't really start to work until about 1800rpm. I very much doubt that a properly tuned setup would give worse turbo lag than you have at present.
The online pages on performance all suggest that a combination of large bore exhaust, intercooler, injection pump adjustment and turbo tweaks are the way to go if you want to boost performance. I *think* Maarten also offers the option of a different camshaft if you want still more power - you'd have to ask him.
The info I've read over the years suggests that you can raise the output of the 1HD-T to the 200 - 230bhp range without trying too hard. I've no doubt you could go beyond that, but you would have to start thinking about the other drivetrain components, and also the stress on the motor itself.
Sorry to be boring, but I really would go the "tried and tested" route with a FMIC, unless you are feeling very rich!
Christopher Bell (Typical "belt and braces" engineer)
Devon, UK
1HD-FT
|
|Hi all,
|
|I'm still interested in intercooling my 1-HDT 12
|valve. I already have a air/air core from a 15B engine
|(the same in Megacruiser) to be front mounted -
|although I haven't paid it yet. )
|
|For our Cruisers, I see this issue in the following
|way.
|
|Our options:
|
|FMIC - Front mounted intercooler (air/air) - like
|Maarten, Safari and custom mounts like the one I'm
|thinking.
|
|TMIC - Top mounted intercooler (air/air) - lot's of
|4x4 use this, Subaru use this (except for WRC, where
|the factory cars change it to FMIC...). I think it's a
|poorer design since it will certainly be heat soaked
|in real world use.
|
|So, the FMIC will do the trick. But!... Certainly will
|be effective at high speeds and probably will increase
|turbo lag due to all the piping. In slower speeds,
|it's efficiency reduces drastically.
|
|Wich leaves me to the million dollar question: what
|about a TMIC air/water intercooler? Sure it's more
|expensive, more complex and more prone to failure
|mainly because the circuit has more components. But
|for the slow speed offroading, wouldn't it work best?
|
|Water keeps temperature 37 times better than air, from
|what I read. For a big rig like ours wouldn=B4t it be
|our best choice?
|
|Thanks
|
|Rui from Portugal
|
|1HDT
____________________________________________________________
Electronic mail messages entering and leaving Arup business
systems are scanned for acceptability of content and viruses