Gt-t's getting a 900 x 600 intercooler

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Postby vvega » Mon May 09, 2005 8:19 pm

think of it like this
big intercoolers hold more air volume
more air volume = ,opre stored pressure
more stored pressure = holds boost pressure longer when changing gear
this in turn can mean you have less lag

it a interesting arugment that time and time a gain is argued to death
gtr's have a massive intercooller a very little lag

iold school cars have lots of lag and most have no intercooler

theres more in it than i think you all give it credit for

v
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Postby Dell'Orto » Mon May 09, 2005 8:25 pm

vvega wrote:think of it like this
big intercoolers hold more air volume
more air volume = ,opre stored pressure
more stored pressure = holds boost pressure longer when changing gear
this in turn can mean you have less lag

it a interesting arugment that time and time a gain is argued to death
gtr's have a massive intercooller a very little lag

iold school cars have lots of lag and most have no intercooler

theres more in it than i think you all give it credit for

v


Its not quite so simple as you put it though...80's turbo's were nowhere near as advanced as they are now (duh) with some pretty rudimentary internals, and on some cars I've seen, very very mismatched turbine and compressor housings.
GT-R's also run two medium sized turbos on a high revving 2.6 litre motor, its gonna have more spoolability (new word, I made it up :lol:) than your average 2 litre innit.
Big intercoolers definately hold more volume, but that volume has to be filled first to reduce any lag between gears ;)
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Postby Malcolm » Mon May 09, 2005 8:30 pm

and after this guy fits a big, cheap, bling, soft springed, leaking blow off valve, it's going to have to refill the whole system every time you put your foot down Image
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Postby u4dina » Mon May 09, 2005 8:39 pm

RomanV wrote:
Dude calm down....the reason why i posted this was for advise not smart remarks...i thought it was quite a reasonable question just to see if my engine could handle an intercooler this size.... if u don't want to share something worth while better not to share anything all....



Yeah you are right, I suppose that was a bit over the top. My apologies.

Aaah, mondays, eh?

sorry. :lol:


all good man
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Postby u4dina » Mon May 09, 2005 9:42 pm

All_Fours wrote:and after this guy fits a big, cheap, bling, soft springed, leaking blow off valve, it's going to have to refill the whole system every time you put your foot down Image


dont' worry man i like my car and im not into fitting cheap things to it...but thanks for the advise........if i was cheap i don't think i would have bought my caldina......

thanks for all the advise and opinions......i'm getting a new clutch put in it now so i gota wait to get some $$ before i do anything else to it...i keep you all posted to let you know what i've done....
cheerz....
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Postby fivebob » Mon May 09, 2005 9:58 pm

All those that say a big I/C will have a lot of lag need to do some basic calculations and quantify the expected lag. You may find that it's not as much as you might expect :wink: Also bear in mind that pressure waves move at the local acoustic velocity (speed of sound) not at velocity of the air column.

A far bigger cause of lag is the number, radius and angle of bends in the system, also changes in diameter. All of these determine the number and strength of the reflected pressure waves, and IMHO these are really what causes lag, not the volume of the cooler.

Regardless of that a 900x600 I/C is far too big for a GT-T and will adversely affect the cooling system and A/C condenser efficiency :evil:
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Postby vvega » Mon May 09, 2005 11:56 pm

Mmm, Boost wrote:
vvega wrote:think of it like this
big intercoolers hold more air volume
more air volume = ,opre stored pressure
more stored pressure = holds boost pressure longer when changing gear
this in turn can mean you have less lag

it a interesting arugment that time and time a gain is argued to death
gtr's have a massive intercooller a very little lag

iold school cars have lots of lag and most have no intercooler

theres more in it than i think you all give it credit for

v


Its not quite so simple as you put it though...80's turbo's were nowhere near as advanced as they are now (duh) with some pretty rudimentary internals, and on some cars I've seen, very very mismatched turbine and compressor housings.
GT-R's also run two medium sized turbos on a high revving 2.6 litre motor, its gonna have more spoolability (new word, I made it up :lol:) than your average 2 litre innit.
Big intercoolers definately hold more volume, but that volume has to be filled first to reduce any lag between gears ;)


hmm advanced turbos.. like t3's and t4's and t25's or perhaps some of the old kkk's
new ???
you do relise a gtr uses 2 old turbos like t25's

you may also relise that they use t25's on high reving 4 cylanders.. let alone a 2.6 :D

people think turbos have come a long way... well imo they havent most are just blade revions on there old core ....cept bb turbo's

i doi agree that intercooler is gunna be to big... but i dont agree with comments of his car havning much more lag
as fivebob said theres more to lag than just the size of your piping and the size of your intercooler
personally i feel these things make up very little of what you feel lag is...
just my thoughts

v
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Postby u4dina » Thu May 12, 2005 2:50 pm

ok i've done more research into this....my mates honda dosn't have any probs with lag or anything but then again he's spent alot of $$$ doing all the right things to it....most of the guys at the shop told me the same as what fivebob has said lag is more due to the size of the pipes being used and also the number of bends etc in the install......oh and fivebob i can't very the a/c unit cos he's taken that out of his car....anyways i'm not to big of a man to admit that maybe this was an over kill for the little toy....i'm kinda worried about cooling down the turbo but over heating my engine as to what fivebob had said......so back to the drawing board........anyways it was an interesting discussion :D hope it helps other in there quest for bigger and better......
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Postby RomanV » Thu May 12, 2005 4:21 pm

Instead of: "will an intercooler of this size fit?"
How about: "What would be the optimal sized FMIC for the 'Dina?"
And then work from there. :)

Since the aesthetic appeal of a FMIC originated from its functionality, surely the most functional FMIC will look the best. 8)

Ive seen cars before with HUGE intercoolers on the front, and it looks rediculous IMO.
But thats just me of course. :)

Good luck!

P.S. And looking at the pic in your Avatar, where were you going to mount the huge intercooler anyway? It would be a pity to hack and slash the front of such a nice car. :(
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Postby u4dina » Thu May 12, 2005 5:19 pm

[quote="RomanV"]Instead of: "will an intercooler of this size fit?"
How about: "What would be the optimal sized FMIC for the 'Dina?"
And then work from there. :)

Since the aesthetic appeal of a FMIC originated from its functionality, surely the most functional FMIC will look the best. 8)
quote]


tru dat...!!
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Postby nite b » Thu May 12, 2005 10:11 pm

Sorry, just straying away from the obvious 'efficiency theme' here...

Just wondering if you have taken to the front of your 'dina with a tape-measure yet?

Im sure last time I checked, you may have a little trouble getting 900 wide between your headlights, let alone 600 high in without collecting every catseye in ya neighbourhood...

Dont get me wrong, I'm all for a good lookin front mount; but those are some big figures for an already tightly packed front bumper...
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Postby Santa'sBoostinSleigh » Thu Oct 20, 2005 12:29 pm

i know this was ages ago, but did anything come of it?
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nah nothing so far...

Postby u4dina » Thu Oct 20, 2005 3:53 pm

I've got an intercooler already...but i'm not going to fit it until mid next year cos i'm off to japan for a visit and hopfully i can pick up a nice kit for the caldina..... the inter cooler is not as big as i originally mentioned cos i guess there is a limit hahaha....
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Postby Santa'sBoostinSleigh » Thu Oct 20, 2005 7:50 pm

keep us posted on the kits, might have to bring a couple back ;)
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Postby u4dina » Thu Oct 20, 2005 9:05 pm

all good...i guess if more peoples interested we can share the cost of sea freighting it here which would be cool...my thoughts are the more caldinas looking the part the better.... 8) ...just remember to remind me.... :lol:
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