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turbos? 

 

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 Post subject: turbos?
Posted: Thu Aug 07, 2008 8:57 pm 
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hey does anyone know wat 300zx turbos are?

 

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Posted: Fri Aug 08, 2008 1:28 am 
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As used in VG30T ? Yes they are T3 .63 A.R .. Slightly bigger than std RB30T / VL Commdore turbo... You'll need two on 6 or 8 cyl...

 

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Posted: Fri Aug 08, 2008 6:32 pm 
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mmm but would it be worth it or just get a bigger turbo

 

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Posted: Fri Aug 08, 2008 7:24 pm 
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forbsy wrote:
mmm but would it be worth it or just get a bigger turbo

A lot of work to do a twin turbo.....ask urself why so many skyline owners run one turbo??? one bigger turbo is better......but not in all cases, i guess it depends how much power you want.

Cheers

Daz 8-)

 

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Posted: Fri Aug 08, 2008 7:28 pm 
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ive been told that they are a gt25 and good for 180 kws but i mights just get that one for now then upgrade when i want more power

this is what i got told
They are T25's, but they are more similar to the CA18 T25's rather than the early SR ones.

 

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Posted: Fri Aug 08, 2008 10:06 pm 
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forbsy wrote:
ive been told that they are a gt25 and good for 180 kws but i mights just get that one for now then upgrade when i want more power

this is what i got told
They are T25's, but they are more similar to the CA18 T25's rather than the early SR ones.

LOL!! have you actually seen the size of a T25 turbo?? there f**k tiny, i wouldnt waste my time with one...

 

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Posted: Sat Aug 09, 2008 1:00 am 
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Here are my old VG30T turbo's.. These have been hi flowed with steel turbine wheels.. The lower turbo is an SC61 / t3/4 hybrid 600 h.p..
Image

The lower turbo here is the VG30T compressor side..
Image

From memory I made about 400 rwhp with these..

 

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Posted: Sat Aug 09, 2008 9:35 am 
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thanks looks like ill get them

 

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Posted: Sun Aug 10, 2008 1:45 am 
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forbsy wrote:
thanks looks like ill get them


Did you not believe me in first post ??

 

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As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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Posted: Sun Aug 10, 2008 12:54 pm 
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The following is an extract from Corky Bell's "Maximum Boost"

Quote:
An engine with flow capabilities greater than 300cfm (roughly 180cid) can benefit from 2 turbos. Two little turbos can slightly cut lag, as opposed to one large turbo, and allow a better balance of low-speed and top-end performance. Over 350cid, twin turbos become a virtual necessity. Do not accept the idea that twin turbo's are inherently more powerful, as too many other factors are involved.


Hope this helps.

:D Daz 8-)

 

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Posted: Sun Aug 10, 2008 1:21 pm 
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yeh ok ill just wait nd get a snort kit

 

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Posted: Sun Aug 10, 2008 5:21 pm 
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DA22LE wrote:
The following is an extract from Corky Bell's "Maximum Boost"

Quote:
An engine with flow capabilities greater than 300cfm (roughly 180cid) can benefit from 2 turbos. Two little turbos can slightly cut lag, as opposed to one large turbo, and allow a better balance of low-speed and top-end performance. Over 350cid, twin turbos become a virtual necessity. Do not accept the idea that twin turbo's are inherently more powerful, as too many other factors are involved.


Hope this helps.

:D Daz 8-)


While maximum boost is a great entry level book, that above statement is totally incorrect, with regard to larger engines needing twins, maybe back when he wrote the book, but not these days.

 

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Posted: Sun Aug 10, 2008 6:08 pm 
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Maximum boost was written how long ago now? 30 years? Turbo technology has come a loooooong way since then.

Maybe forbs was given info on the turbo's from the VG30DETT which are waaaaaaay too small for a 4L motor that can spin to 5500rpm.
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Posted: Sun Aug 10, 2008 6:10 pm 
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lol okay guys oll tell the guy i dont wnt them

 

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Posted: Sun Aug 10, 2008 6:18 pm 
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ltd351T wrote:
While maximum boost is a great entry level book, that above statement is totally incorrect, with regard to larger engines needing twins, maybe back when he wrote the book, but not these days.

I agree totally, which is even more reason to consider the bad points of twin turboing. If i was turboing a v8, i would go for twins if i had the room, and a single if i didnt. A lot of factors in choosing the "right" set-up.

Cheers

Daz :D

 

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