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Bonnet scoop for i30 turbo diesel Sierra?
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Author:  jimmey [ Mon Sep 15, 2014 10:44 pm ]
Post subject:  Bonnet scoop for i30 turbo diesel Sierra?
Hey guys

im planning out a build that will be a 90ish model soft top SWB sierra with a 1.6 crdi trubo from a Hyundai i30 chuciked in it.
the plans are pretty much down to the tedious and more aesthetic parts now, as well as waiting for the financial part too hahaha.

I was wondering if I put a hood scoop on it what would be the pro's and cons? and would it even be worth it?

im thinking it's main advantage would be to ultimately cool the entire engine bay and mainly the turbo and intercooler?

cons I'm thinking would be the fact that ill have an open hole on my hood. but she will have a snorkel so everything will be water tight and it will be a diesel so do you think this would even be a problem?

and finally, would it even need the extra cooling? itll be running a vitara radiator which is a tiny bit bigger then stock i30.

Cheers guys!

Jimmy
Author:  Scrawny [ Tue Sep 16, 2014 5:14 am ]
Post subject:  Re: Hood Scoop For Turbo Diesel Sierra?
Curious to know what gearbox and sump you're running..... and how you're getting around the electronics.

Honestly don't think you'll fit an intercooler on top of the motor, it'll have to sit out the front
Author:  5ierra [ Tue Sep 16, 2014 6:48 am ]
Post subject:  Re: Hood Scoop For Turbo Diesel Sierra?
Scrawn wrote:
Curious to know what gearbox you're running.

Honestly don't think you'll fit an intercooler on top of the motor, it'll have to sit out the front


Will depend on the size of the cooler. The 660cc turbos came with a top mount.
Author:  want33s [ Tue Sep 16, 2014 7:20 am ]
Post subject:  Re: Hood Scoop For Turbo Diesel Sierra?
Scrawn wrote:
Curious to know what gearbox you're running.

X2
Author:  AckerDackerly [ Tue Sep 16, 2014 8:24 am ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
I can't comment on the Hyundai diesel, but apparently us Yanks can fit one of those small top-mounted intercoolers over/beside the various VW engine installs.

An intercooler without air blowing across it is so much expensive non-functional hardware cluttering up the engine bay. A hood airscoop (no matter what the perceived "gay" factor) is necessary to reduce the temperature of the intake air and thus generate more (speaking in my best imitation of Jeremy Clarkson), POWER!

Of course, if you are not actually moving at speed (ie crawling or driving slowly on the trails) a front mount - if you can fit the ductwork around the radiator - would be better. The existing radiator fan would provide cooling airflow...

I hate to even think of it, but it looks like the horizontally-mounted intercooler with the dreaded hood scoop looks like the best way for my diesel SJ project... :(

Also, if you can find one somewhere, I recommend the Pre-88.5 5-speed with the lower( or is it higher?) 5th gear. Pre-88.5 was .795 - 88.5 and later had .864 ratios. It will help cancel out the 1.49 to 1 2-high ratio on the t-case and make your diesel run at lower RPMs on the highway. Just sayin'...
Author:  Scrawny [ Tue Sep 16, 2014 8:29 am ]
Post subject:  Re: Hood Scoop For Turbo Diesel Sierra?
5ierra wrote:
Scrawn wrote:
Curious to know what gearbox you're running.

Honestly don't think you'll fit an intercooler on top of the motor, it'll have to sit out the front


Will depend on the size of the cooler. The 660cc turbos came with a top mount.


No, I think it'll depend on the height of the engine and where it sits in the engine bay.
Author:  bangn [ Tue Sep 16, 2014 9:47 am ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
a diesel? gee the transfercase and diffs are going to love that. Hope its got a duel mass.
Author:  MrRocky [ Tue Sep 16, 2014 2:40 pm ]
Post subject:  Re: Hood Scoop For Turbo Diesel Sierra?
want33s wrote:
Scrawn wrote:
Curious to know what gearbox you're running.

X2



X3
Author:  got_bar_work [ Tue Sep 16, 2014 2:45 pm ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
Water to air intercooler would prob fit better then top mount and work
Top mounts suck
My work ute gets massive heat soak from the motor when going slow. You can watch the intake temp rise on my obd2 torque app
Author:  jimmey [ Tue Sep 16, 2014 9:25 pm ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
Thanks guys for all the feedback!!
i think what I'm gonna do is use the stock intercooler or something similar which is a front mount.

-The motor looks like it can be pushed back in the engine bay a bit more the the original motor did so hopefully that will leave a bit of room for a tiny intercooler. if that doesn't work, ill work something out! after it all its just a really expensive hobby haha!

-as far as all the electrical work, I'm going to buy a write off so I can just use/ fashion a new one from the original loom and just rip out the cables that wont be used and what not. I'll also be using the i30 orignal cluster and making an entire new dash in the sierra hopefully from fibreglass, but ive never used it before so see how i go!!

for those curious ill be using the complete I30 crdi motor and Gearbox. amazingly enough the gear ratio from the i30 box is nearly identical to the stock 1.3 sierra.

I.e

Sierra 1.3 MT I30 CRDI MT

1st 3.652 3.636
2nd 1.947 1.962
3rd 1.423 1.257
4th 1.000 0.844
5th 0.795 0.702
6th N/A 0.596

rev 3.466 3.583

Diff 3.909 3.941


EDIT:::: Just did some more calc
I30 1.6 CRDI= 260 Nm @ 1900 - 2750 RPM -----http://www.hyundai.com.au/vehicles/i30/specification-range
Sierra 1.3 = 102 Nm @ 3,500RPM ----------------http://www.4x4.in.th/specification.html
1.6 Vit JLX = 126 @ 3,100RPM --------------------http://www.carfolio.com/specifications/models/car/?car=37631
1.6 Vit 16v = 132 @ 4,000RPM -------------------http://www.carfolio.com/specifications/models/car/?car=29766

I'll also be running max 30" tyres so the speedo is going to have to be electronically calibrated anyway.

although the diesel will have a lot more torque im pretty sure the suzi tranny and diff will be fine considering the ratios are nearly the same.


I'll be writing up a complete build thread through the build in real time hopefully by mid next year, so i'll be asking for a lot of advice and opinions from the more experienced!!!

appreciate all the help!



Sources: http://www.4x4.in.th/specification.html http://www.hyundai.com.au/vehicles/i30/ ... tion-range

cheers,
jimmy
Author:  JrZook [ Tue Sep 16, 2014 10:01 pm ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
jimmey wrote:
for those curious ill be using the complete I30 crdi motor and Gearbox. amazingly enough the gear ratio from the i30 box is nearly identical to the stock 1.3 sierra.


So how are you going to mount it in the zuk considering the I30 is a front wheel drive and the engine/gearbox is in east- west configuration as opposed to the north-south RWD zuk layout?
Author:  atari4x4 [ Tue Sep 16, 2014 10:08 pm ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
JrZook wrote:
jimmey wrote:
for those curious ill be using the complete I30 crdi motor and Gearbox. amazingly enough the gear ratio from the i30 box is nearly identical to the stock 1.3 sierra.


So how are you going to mount it in the zuk considering the I30 is a front wheel drive and the engine/gearbox is in east- west configuration as opposed to the north-south RWD zuk layout?


:?
Author:  SierraDan [ Tue Sep 16, 2014 11:15 pm ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
Transaxle? :D
Author:  jdk81 [ Wed Sep 17, 2014 5:47 am ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
Any transfer plans on a transfer case?
Author:  want33s [ Wed Sep 17, 2014 6:58 am ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
Unless you plan on building a Thai style outback challenge car with a godwinch, I think a lot more research is required.

Don't i30s have a key transponder? If so you'll need a lot more than just the loom and cluster.

Sounds like potentially feasible conversion if you can get past the gearbox fitment and diff ratios.
Author:  Reubs [ Wed Sep 17, 2014 7:46 am ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
jimmey wrote:
for those curious ill be using the complete I30 crdi motor and Gearbox. amazingly enough the gear ratio from the i30 box is nearly identical to the stock 1.3 sierra.

I.e

Sierra 1.3 MT I30 CRDI MT

1st 3.652 3.636
2nd 1.947 1.962
3rd 1.423 1.257
4th 1.000 0.844
5th 0.795 0.702
6th N/A 0.596

rev 3.466 3.583

Diff 3.909 3.941


EDIT:::: Just did some more calc
I30 1.6 CRDI= 260 Nm @ 1900 - 2750 RPM -----http://www.hyundai.com.au/vehicles/i30/specification-range
Sierra 1.3 = 102 Nm @ 3,500RPM ----------------http://www.4x4.in.th/specification.html
1.6 Vit JLX = 126 @ 3,100RPM --------------------http://www.carfolio.com/specifications/models/car/?car=37631
1.6 Vit 16v = 132 @ 4,000RPM -------------------http://www.carfolio.com/specifications/models/car/?car=29766

I'll also be running max 30" tyres so the speedo is going to have to be electronically calibrated anyway.

although the diesel will have a lot more torque im pretty sure the suzi tranny and diff will be fine considering the ratios are nearly the same.

What transfer case are you planning to use? A Sierra transfer is underdriven about 1.5:1 in high range.
Author:  Gwagensteve [ Wed Sep 17, 2014 8:06 am ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
You haven't added transfer reduction of 1.409 to the calcs. That turns the sierras 3.9 diff gears into the equivalent of 5.49.

If you could use the Hyundai transmission, (and you can't) you could get revs down to 2200rpm at cruise with stock transfer and 30" tyres.

If you stick to the sierra gearbox transfer and diffs, you're at 3300 at 100km/h, way too high for a diesel.

260Nm is going to be very hard on driveline.
Author:  Scrawny [ Wed Sep 17, 2014 8:36 am ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
You'll have to make a custom oil pickup and sump too, otherwise the motor will be sitting high to clear front diff
Author:  bangn [ Wed Sep 17, 2014 9:25 am ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
Quote:
although the diesel will have a lot more torque im pretty sure the suzi tranny and diff will be fine considering the ratios are nearly the same.


you've got no fucking idea, not even going to explain it.
Author:  Gwagensteve [ Wed Sep 17, 2014 10:02 am ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
Yep. I think this conversion is well outside your problem solving ability.

I think you should have a really good look at the acme TDi conversions. It's a proven conversion (although I personally think it's pointless) but it will give you good idea of the real cost and feasibility of a small TDi conversion.
Author:  jdk81 [ Wed Sep 17, 2014 10:05 am ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
A sierra xfer wont live long under 230nm and 1st of 3.875.
I wouldnt risk aftermarket gears.
i dont know how long the lay shaft, needle bearings and counter would last under that constant torque input
only sierra xfer id consider in that setup would be a 1.0l non switched

It seems like a poorly thought out build, and over estimating your skills and knowledge.
Aesthetics and everything else is miles away.

There's a reason why so many diesel conversions are just a dream

edit: beaten by steve
Author:  droverdave [ Wed Sep 17, 2014 10:22 am ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
IF mr OP gets serious about this conversion, and has the skills (or the cash), there's no reason why a custom adaptor couldn't be fabricated to mate the i30 engine up to any gearbox. Just a different version of the Ben T kit for making a G16b to a G13a gbox. And if he is going to go to that much effort, then putting a different transfer case and/or diffs (Stronger ones), surely isn't out of the question either. The clutch would need to be thought out obviously. But custom clutches can be done. different splines etc. Costly, but certainly doable.

Bolting the engine in i reckon is half the battle though. The wiring and plumbing is going to be tricky.

One has to question the OPs ability given I would have thought that the bonnet scoop would be the least of your worries at this stage.

For the sake of answering the question though, how about a factory GC8 WRX scoop, would look alright i think. They can be had cheap too because everyone puts the later model STI ones on (which look a bit ugly i reckon)

http://www.ebay.com.au/itm/97-99-Wrx-Bo ... d0f&_uhb=1

Is all this effort worth it? well that is up to the OP to decide. Its going to be a costly project though.
Author:  Gwagensteve [ Wed Sep 17, 2014 11:05 am ]
Post subject:  Re: Bonnet scoop for i30 turbo diesel Sierra?
That torque level meets or exceeds 4cylinder petrol hilux, so as a guide, hilux driveline might be the useful starting point. By the time you swap all that driveline into a sierra, how much better at anything would this hybrid thing be than a hilux?
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