lookee what i found! (bigazz turbo?)

PRVersion · 03-10-2005, 01:58 AM

i got this from a buddy for free, it came off an '90 RX7. it needs rebuilding, and i can see i'm going to need to do some work on the exhause side of the thing to make it work, as well as rebuild it, but what do you guys thing? some research has shown this to (most likely) be a t3/t4. it sure is a hell of a lot bigger than my stock turbo.

what do you guys think?

linuxman51 · 03-10-2005, 03:04 AM

ht18 eh? you'd be better served making the turbine fit a garrett turbine housing (it will)

DeathWagon · 03-10-2005, 03:07 AM

Its a series 5 turbo II rx7 HT18.

The turbo is a good one for rx-7's but i am not soo sure its a good choice for a volvo. The compressor wheel drops off pretty hard around 12psi..

If you have any questions ask my buddy Brian at BNR Supercars. He builds those turbos for a living. The turbine housing will be difficult to make work but good luck any how.

Sam

PRVersion · 03-10-2005, 03:19 AM

Quote:

Originally Posted by linuxman51

ht18 eh? you'd be better served making the turbine fit a garrett turbine housing (it will)

tell me more....i dont know much about turbos yet but i am a skilled fabricator and machinist. chances are if its metal, i can make it work....

linuxman51 · 03-10-2005, 03:46 AM

Quote:

Originally Posted by DeathWagon

Its a series 5 turbo II rx7 HT18.

The turbo is a good one for rx-7's but i am not soo sure its a good choice for a volvo. The compressor wheel drops off pretty hard around 12psi..

If you have any questions ask my buddy Brian at BNR Supercars. He builds those turbos for a living. The turbine housing will be difficult to make work but good luck any how.

Sam

what he said.

eight_fitty · 03-10-2005, 01:37 PM

a nice spit-shine ought to do the trick!! lol

(you should have asked for the RX-7 too!!)

Captain Bondo · 03-10-2005, 01:46 PM

Ebay it and buy something more suitable. Not trying to pee on your cornflakes, its just nt a good turbo for a 2.3

JW240 · 03-10-2005, 02:28 PM

That twin scroll housing will be difficult to adapt, and without a splitter of some good heat reistant material, it will probably overheat.. And cause more drag.
But it could be a interesting turbo to use, but I think it isn't worth it

.

Fuse · 03-10-2005, 04:07 PM

Would be easiest just to make a new exhaust manifold. If he is a skilled machinist and fabricator as he says it shouldn't be too hard to weld a new exhaust header. Would also be much better flowing than the stock exhaust manifold.

linuxman51 · 03-10-2005, 05:08 PM

Quote:

Originally Posted by JW240

That twin scroll housing will be difficult to adapt, and without a splitter of some good heat reistant material, it will probably overheat.. And cause more drag.
But it could be a interesting turbo to use, but I think it isn't worth it

.

you aint gonna overheat anything that was on a turbo rx-7

kyle242gt · 03-10-2005, 05:25 PM

Is that turbo scary white color inside or is that my imagination? What does a pinging/detonating rotary sound like?

Captain Bondo · 03-10-2005, 06:53 PM

how about not wasting time trying to do the "square peg in a round hole" thing and ebaying it and buying a turbo that will bolt up and work properly?

PRVersion · 03-10-2005, 11:02 PM

Quote:

Originally Posted by Captain Bondo

how about not wasting time trying to do the "square peg in a round hole" thing and ebaying it and buying a turbo that will bolt up and work properly?

yeah. this is the official plan. once i gave it more than like 2 seconds thought after i found out its not a t3/t4 its destined either for ebay, and if it doesnt sell, for the workbench for complete disassembly in the name of science.

the poi · 03-11-2005, 12:21 AM

Quote:

Originally Posted by kyle242GT

What does a pinging/detonating rotary sound like?

thousands of dollars falling onto the pavement.

PRVersion · 03-11-2005, 12:51 AM

is that what all that tan/whitish stuff is? i assumed that was normal...(i know precisely squat about turbos stilll...aside from the part about being spun by the exhaust and making a crapload more power

)

own6volvos · 03-11-2005, 01:23 AM

Quote:

Originally Posted by the poi

thousands of dollars falling onto the pavement.

Too true

EricF · 03-11-2005, 02:45 AM

Quote:

Originally Posted by kyle242GT

Is that turbo scary white color inside or is that my imagination? What does a pinging/detonating rotary sound like?

Wanananananana--POP!

Time to rebuild it, again!

Interesting looking turbo, never seen one of those before.

linuxman51 · 03-11-2005, 03:27 AM

Quote:

Originally Posted by kyle242GT

Is that turbo scary white color inside or is that my imagination? What does a pinging/detonating rotary sound like?

white just means it was nice and blistery hot in there, standard operating proceedure for a rotary, and fairly normal on my cars as well, i might add.

low boost detonation on a rotary sounds like a whistling noise, and contrary to popular belief, they'll take a little abuse (but not much, and really not much above around 15psi i'm told).

JW240 · 03-11-2005, 06:44 AM

Indeed, that white color indicates a very high temperature.. The devider shouldn't be too much of a problem now I think of it....

I have seen truck turbo's that had the devider, and no exhaust manifold with devider. The devider looked like someone cut a inch of it away with a angle grinder.. totally cut in half..

jpbturbo · 03-11-2005, 10:09 AM

Quote:

Originally Posted by kyle242GT

What does a pinging/detonating rotary sound like?

Owww, My Apex seal!

PRVersion · 03-11-2005, 12:21 PM

ok, so its not a good turbo for a volvo. what makes it bad? other than the work involved, what makes it "bad"? is it just a matter of the way it makes power?

Captain Bondo · 03-11-2005, 01:12 PM

What Deathwagon said:
"The compressor wheel drops off pretty hard around 12psi."

It isn't designed for the high pressure ratios that our motors need to make good power. It gets inefficient and starts to superheat the air past 12psi.

InferiorWang · 03-11-2005, 02:16 PM

in other words...too small and inefficient

Captain Bondo · 03-11-2005, 03:53 PM

No, not too small or inefficent, it does not support the pressure ratio required. It is entirely efficent within it's operating range, and a turbo can be capable of 500hp and still have a map that falls of at 12psi. It would not be "too small", it would simply be wrong.

PRVersion · 03-11-2005, 04:33 PM

i apparently need a lesson in understanding turbo maps...

03-10-2005, 03:04 AM	#2
linuxman51 ARRRRHARHAR Join Date: Dec 2002 Location: mont, AL	ht18 eh? you'd be better served making the turbine fit a garrett turbine housing (it will) __________________ "They bum rushed them in their own crib, they drank all their beer, they partied with their ladies and they left with the trophy" Megasquirt Tuning! Plug and play LH 2.4 Megasquirt, now with stealth mode! ported volvo heads

03-10-2005, 03:07 AM	#3
DeathWagon Board Member Join Date: Feb 2003 Location: Under the hood of kennys car!!!	Its a series 5 turbo II rx7 HT18. The turbo is a good one for rx-7's but i am not soo sure its a good choice for a volvo. The compressor wheel drops off pretty hard around 12psi.. If you have any questions ask my buddy Brian at BNR Supercars. He builds those turbos for a living. The turbine housing will be difficult to make work but good luck any how. Sam __________________ www.pbase.com/sam3481 One of the corner workers put it best regarding sam's volvo thrashing: "Sam is setting the front up for next turn, whilst the rear of the wagon is still recovering from 3 turns ago."

03-10-2005, 01:37 PM	#6
eight_fitty Board Member Join Date: Sep 2004 Location: CALGARY (go canucks)	a nice spit-shine ought to do the trick!! lol (you should have asked for the RX-7 too!!) __________________ Derek \| this is my sig

03-10-2005, 02:28 PM	#8
JW240 visst Join Date: Aug 2004 Location: The Netherlands, Europe	That twin scroll housing will be difficult to adapt, and without a splitter of some good heat reistant material, it will probably overheat.. And cause more drag. But it could be a interesting turbo to use, but I think it isn't worth it . __________________ 240 \| 1991 \| 271 KKm \| B230F+T \| M90H \| fuel:E85 Amazon/121 \| 1968 \| finished 2016+?

03-10-2005, 04:07 PM	#9
Fuse Board Member Join Date: Oct 2004 Location: Finland	Would be easiest just to make a new exhaust manifold. If he is a skilled machinist and fabricator as he says it shouldn't be too hard to weld a new exhaust header. Would also be much better flowing than the stock exhaust manifold. __________________ Volvo R-Sport - Equipment for the car enthusiast. http://www.volvo300mania.com Last edited by Fuse; 03-10-2005 at 04:09 PM..

03-10-2005, 06:53 PM	#12
Captain Bondo Exklusiv Zubehör Klub Join Date: Sep 2002	how about not wasting time trying to do the "square peg in a round hole" thing and ebaying it and buying a turbo that will bolt up and work properly?

03-11-2005, 12:51 AM	#15
PRVersion Board Member Join Date: Feb 2005 Location: Canby	is that what all that tan/whitish stuff is? i assumed that was normal...(i know precisely squat about turbos stilll...aside from the part about being spun by the exhaust and making a crapload more power )

03-11-2005, 06:44 AM	#19
JW240 visst Join Date: Aug 2004 Location: The Netherlands, Europe	Indeed, that white color indicates a very high temperature.. The devider shouldn't be too much of a problem now I think of it.... I have seen truck turbo's that had the devider, and no exhaust manifold with devider. The devider looked like someone cut a inch of it away with a angle grinder.. totally cut in half..

03-11-2005, 12:21 PM	#21
PRVersion Board Member Join Date: Feb 2005 Location: Canby	ok, so its not a good turbo for a volvo. what makes it bad? other than the work involved, what makes it "bad"? is it just a matter of the way it makes power?

03-11-2005, 01:12 PM	#22
Captain Bondo Exklusiv Zubehör Klub Join Date: Sep 2002	What Deathwagon said: "The compressor wheel drops off pretty hard around 12psi." It isn't designed for the high pressure ratios that our motors need to make good power. It gets inefficient and starts to superheat the air past 12psi.

03-11-2005, 02:16 PM	#23
InferiorWang Board Member Join Date: Jul 2004 Location: Nashville/Knoxville	in other words...too small and inefficient __________________ "I like anything fast enough to do something stupid in." - Xander Cage, xXx

03-11-2005, 03:53 PM	#24
Captain Bondo Exklusiv Zubehör Klub Join Date: Sep 2002	No, not too small or inefficent, it does not support the pressure ratio required. It is entirely efficent within it's operating range, and a turbo can be capable of 500hp and still have a map that falls of at 12psi. It would not be "too small", it would simply be wrong.

03-11-2005, 04:33 PM	#25
PRVersion Board Member Join Date: Feb 2005 Location: Canby	i apparently need a lesson in understanding turbo maps...

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