nissan exa turbo problems ???

Discussion:

dsoo-bzGI/

2001-01-22 14:08:33 UTC

hi there,
i have just purchased a 1984 nissan exa turbo....completely
stock...it even came with roof racks and a rear sun shade thingy that
goes on the rear windscreen.....

anyway, i am runnin it on optimax and it still detonates.....why ???

could it be because the timing is out ???
and if so, what is the correct timing ???

the car is also a crappy handler.....it wants to understeer in every
corner....even when it is not being pushed hard......is there a cheap
solution to this problem ???

i also want to boost this car.......for now with the t2........i was
just wonderin how much boost will this turbo take without doin any
major damage ??? also how do i go about doin this cause i have heard
that there is something that limits boost to 9psi ???

any help would be greatly appreciated.....

thanks.

r***@public.gmane.org

2001-01-22 14:23:27 UTC

Permalink

--- In e15et-***@public.gmane.org, ***@b... wrote:

Well the timming should be 15 degree (standard). The max boost will
be limited to 10 psi as there is a safety over-boost valves. U will
need to get a plug from a hardware shop and change the over-boost
valves b4 u can increase boost further. Ermmmmmmmm...i run 14 psi
without problems (with intercooler) for a year now and there is steel
no problems. Please fit an intercooler b4 u increase boost!!!

regards
recce

r***@public.gmane.org

2001-01-22 14:23:55 UTC

Permalink

--- In e15et-***@public.gmane.org, ***@b... wrote:

Well the timming should be 15 degree (standard). The max boost will
be limited to 10 psi as there is a safety over-boost valves. U will
need to get a plug from a hardware shop and change the over-boost
valves b4 u can increase boost further. Ermmmmmmmm...i run 14 psi
without problems (with intercooler) for a year now and there is still
no problems. Please fit an intercooler b4 u increase boost!!!

regards
recce

dsoo-bzGI/

2001-01-23 02:03:32 UTC

Permalink

Post by r***@public.gmane.org
Well the timming should be 15 degree (standard). The max boost will
be limited to 10 psi as there is a safety over-boost valves. U will
need to get a plug from a hardware shop and change the over-boost
valves b4 u can increase boost further. Ermmmmmmmm...i run 14 psi
without problems (with intercooler) for a year now and there is still
no problems. Please fit an intercooler b4 u increase boost!!!
regards
recce

hi reece,

i already have bought a sr20det intercooler.....it's just a matter of
fittin it on now :)

in regards to the over-boost valves......what needs to be done to
increase boost above 10psi ???

if i use the t2 (but intercooled) what max psi shood i run ???

thanks,
daniel.

Michael Pitt

2001-01-23 02:34:15 UTC

Permalink

Subject: [e15et] nissan exa turbo problems ???
Date: Mon, 22 Jan 2001 14:08:33 -0000
hi there,
i have just purchased a 1984 nissan exa turbo....completely
stock...it even came with roof racks and a rear sun shade thingy that
goes on the rear windscreen.....

Cool as! Ditch ther roofracks; more drag ;)

anyway, i am runnin it on optimax and it still detonates.....why ???
could it be because the timing is out ???

Could be.

and if so, what is the correct timing ???

About 15deg Before Top Dead Centre (14.7...?)

the car is also a crappy handler.....it wants to understeer in every
corner....even when it is not being pushed hard......is there a cheap
solution to this problem ???

I read an old Wheels magazine review on the EXA the other day (comparison
with Cordia) and they said it handled like a lead-tipped arrow! True but,
they're all like this.

Increasing castor will improve turn-in.
Increasing negative camber will reduce understeer.
Both these options are relatively creap ones - read about $150? S/F

i also want to boost this car.......for now with the t2........i was
just wonderin how much boost will this turbo take without doin any
major damage ??? also how do i go about doin this cause i have heard
that there is something that limits boost to 9psi ???

There is a pressure release valve in the plenum chamber which lets all the
boost vent to atmosphere after 9psi to protect against engine damage. This
can be removed and plugged with a great dirty big hot water pipe screw-in
plug or the like dirt cheap.

Boosting a T2 I believe the common understanding is that beyond about 11psi
you'll start to drive the turbo too far out of its efficiency range (stock
everything else) and start to cause yourseld detonation problems. For best
(and safest) results an intercooler yould be the go.

any help would be greatly appreciated.....
thanks.

No problem! ;)

-Mick
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dsoo-bzGI/

2001-01-23 03:35:38 UTC

Permalink

hey mick,

thanks alot for the info.......

greatly appreciated..........

i'm gonna be runnin a sr20det factory intercooler and i'll make up
some water sprayers........do u think the sprayers r worth the
effort ???

along with the intercooler i'll be gettin a 2 1/2 inch
exhaust....press bent cuz i'm on a tight budget..........so with this
combination do u think the t2 will handle 11psi ok ???

thanks again for the help,
daniel.

Cool as! Ditch ther roofracks; more drag ;)

anyway, i am runnin it on optimax and it still

detonates.....why ???

could it be because the timing is out ???

Could be.

and if so, what is the correct timing ???

About 15deg Before Top Dead Centre (14.7...?)

the car is also a crappy handler.....it wants to understeer in every
corner....even when it is not being pushed hard......is there a cheap
solution to this problem ???

I read an old Wheels magazine review on the EXA the other day

(comparison

with Cordia) and they said it handled like a lead-tipped arrow!

True but,

they're all like this.
Increasing castor will improve turn-in.
Increasing negative camber will reduce understeer.
Both these options are relatively creap ones - read about $150? S/F

There is a pressure release valve in the plenum chamber which lets all the
boost vent to atmosphere after 9psi to protect against engine

damage. This

can be removed and plugged with a great dirty big hot water pipe screw-in
plug or the like dirt cheap.
Boosting a T2 I believe the common understanding is that beyond about 11psi
you'll start to drive the turbo too far out of its efficiency range (stock
everything else) and start to cause yourseld detonation problems.

For best

(and safest) results an intercooler yould be the go.

any help would be greatly appreciated.....
thanks.

No problem! ;)
-Mick

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Wesley Nicholson

2001-01-23 09:14:52 UTC

Permalink

There was a big "intercooler spray" test on autospeed.com
Go there and do a search for it. If you aren't a member yo *may* have some
problems... I'm not sure if that particular article is free, for everyone to
view, though.
They actually sell a sprayer controller that they designed. Very interesting
reading
-----Original Message-----
From: dsoo-bzGI/***@public.gmane.org [mailto:dsoo-bzGI/***@public.gmane.org]
Sent: Tuesday, 23 January 2001 11:36 AM
To: e15et-***@public.gmane.org
Subject: [e15et] Re: nissan exa turbo problems ???

hey mick,

Cool as! Ditch ther roofracks; more drag ;)

anyway, i am runnin it on optimax and it still

detonates.....why ???

could it be because the timing is out ???

Could be.

and if so, what is the correct timing ???

About 15deg Before Top Dead Centre (14.7...?)

the car is also a crappy handler.....it wants to understeer in every
corner....even when it is not being pushed hard......is there a cheap
solution to this problem ???

I read an old Wheels magazine review on the EXA the other day

(comparison

with Cordia) and they said it handled like a lead-tipped arrow!

True but,

they're all like this.
Increasing castor will improve turn-in.
Increasing negative camber will reduce understeer.
Both these options are relatively creap ones - read about $150? S/F

There is a pressure release valve in the plenum chamber which lets all the
boost vent to atmosphere after 9psi to protect against engine

damage. This

For best

(and safest) results an intercooler yould be the go.

any help would be greatly appreciated.....
thanks.

No problem! ;)
-Mick

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Michael Pitt

2001-01-23 06:31:55 UTC

Permalink

Without going nuts on internal work like head porting and stroking it out
and the like, 11psi should be fine. A change in boost pressure to this
level and the installation of this intercooler'll make a huge improvement, I
reckon...

On the topic of water sprays, personally I think the difference that sprays
will make to inlet temps will be very marginal, although I haven't tried it.
Maybe someone else on the list has...?

Good to see you're getting the exhaust done too. You should look into
getting the dump pipe replaced at some point too, although i see you're on a
budget (like me) so this might not be an option right now, as a replacement
dump pipe might cost you anywhere from $200-$400.

Good luck...where are you?

-Mick

Subject: [e15et] Re: nissan exa turbo problems ??? Date: Tue, 23 Jan 2001
03:35:38 -0000
thanks alot for the info.......
greatly appreciated..........
i'm gonna be runnin a sr20det factory intercooler and i'll make up some
water sprayers........do u think the sprayers r worth the effort ???
along with the intercooler i'll be gettin a 2 1/2 inch exhaust....press
bent cuz i'm on a tight budget..........so with this combination do u think
the t2 will handle 11psi ok ???
turbo problems ??? > >Date: Mon, 22 Jan 2001 14:08:33 -0000 > > > >hi
there, > >i have just purchased a 1984 nissan exa turbo....completely >

stock...it even came with roof racks and a rear sun shade thingy that >
goes on the rear windscreen..... > > Cool as! Ditch ther roofracks; more

drag ;) > > >anyway, i am runnin it on optimax and it still
detonates.....why ??? > > > >could it be because the timing is out ??? > >
Could be. > > >and if so, what is the correct timing ??? > > About 15deg
Before Top Dead Centre (14.7...?) > > >the car is also a crappy
handler.....it wants to understeer in every > >corner....even when it is
not being pushed hard......is there a cheap > >solution to this problem ???

Post by Michael Pitt
I read an old Wheels magazine review on the EXA the other day

(comparison > with Cordia) and they said it handled like a lead-tipped
arrow! True but, > they're all like this. > > Increasing castor will
improve turn-in. > Increasing negative camber will reduce understeer. >
Both these options are relatively creap ones - read about $150? S/F > > >i
also want to boost this car.......for now with the t2........i was > >just
wonderin how much boost will this turbo take without doin any > >major
damage ??? also how do i go about doin this cause i have heard > >that
there is something that limits boost to 9psi ??? > > There is a pressure
release valve in the plenum chamber which lets all the > boost vent to
atmosphere after 9psi to protect against engine damage. This > can be
removed and plugged with a great dirty big hot water pipe screw-in > plug
or the like dirt cheap. > > Boosting a T2 I believe the common
understanding is that beyond about 11psi > you'll start to drive the turbo
too far out of its efficiency range (stock > everything else) and start to
cause yourseld detonation problems. For best > (and safest) results an
intercooler yould be the go. > > >any help would be greatly
appreciated..... > > > >thanks. > > No problem! ;) > > -Mick >
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dsoo-bzGI/

2001-01-25 03:22:03 UTC

Permalink

hey michael,

i'm located in sydney.....

improvement, I

reckon...
On the topic of water sprays, personally I think the difference that sprays
will make to inlet temps will be very marginal, although I haven't tried it.
Maybe someone else on the list has...?
Good to see you're getting the exhaust done too. You should look into
getting the dump pipe replaced at some point too, although i see you're on a
budget (like me) so this might not be an option right now, as a replacement
dump pipe might cost you anywhere from $200-$400.
Good luck...where are you?
-Mick

effort ???

along with the intercooler i'll be gettin a 2 1/2 inch

exhaust....press

bent cuz i'm on a tight budget..........so with this combination do u think
the t2 will handle 11psi ok ???

nissan exa

turbo problems ??? > >Date: Mon, 22 Jan 2001 14:08:33 -0000 > > >

there, > >i have just purchased a 1984 nissan exa

turbo....completely >

stock...it even came with roof racks and a rear sun shade thingy that >
goes on the rear windscreen..... > > Cool as! Ditch ther

roofracks; more

Post by Michael Pitt
I read an old Wheels magazine review on the EXA the other day

(comparison > with Cordia) and they said it handled like a lead-

tipped

arrow! True but, > they're all like this. > > Increasing castor will
improve turn-in. > Increasing negative camber will reduce

understeer. >

Both these options are relatively creap ones - read about $150? S/F > > >i
also want to boost this car.......for now with the t2........i was
just
wonderin how much boost will this turbo take without doin any >

major

damage ??? also how do i go about doin this cause i have heard >

that

there is something that limits boost to 9psi ??? > > There is a pressure
release valve in the plenum chamber which lets all the > boost vent to
atmosphere after 9psi to protect against engine damage. This > can be
removed and plugged with a great dirty big hot water pipe screw-in

plug

or the like dirt cheap. > > Boosting a T2 I believe the common
understanding is that beyond about 11psi > you'll start to drive the turbo
too far out of its efficiency range (stock > everything else) and start to
cause yourseld detonation problems. For best > (and safest)

results an

intercooler yould be the go. > > >any help would be greatly
appreciated..... > > > >thanks. > > No problem! ;) > > -Mick >

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