10-12-2009, 01:43 AM
|
 |
Registered User
|
|
Join Date: Aug 2007
Location: South Australia
Posts: 511
|
|
 Quote:
Originally Posted by chelo
A log style manifold should work if your on a budget and not pushing high psi.
|
Quote:
Originally Posted by chelo
For your application get a turbo with a smaller a/r housing. Yes you could use a bigger unit but boost will come in later in the rpm range and you would have to rev the engine higher. Building boost at a lower rpm is more fun than waiting for it to kick in hard. Well actually both are fun but it depends on the purpose of your car.
|
Controlling detonation in a combination like this will be the biggest challenge. Well flowing exhaust manifold, turbine housing and exhaust system will help reduce back pressure on the engine. This helps reduce comustion chamber teamperature, this help prevent detonation.
A slightly larger A/R turbine housing should give a more progressive torque curve.
I do also prefer a stronger low/midrange torque for daily driving, but the more progressive torque curve/air flow characteristics should be a bit easier to tune the carbies for.
__________________
Don't worry what other people think, they don't do it very often. 
Alfa 75 Potenziata, Twincharged AW11 MR2, RB20DET S13 Silvia
|
10-12-2009, 02:00 AM
|
 |
Registered User
|
|
Join Date: Jun 2008
Location: Adelaide SA
Posts: 392
|
|
|
hay duk with the jaycar unit can the map sensor be plug into it and then set it to change curve etc as it to boost?
__________________
"Alfa Romeo built to excite .. Some dream of driving the ideal.. I drive it"
|
10-12-2009, 02:04 AM
|
|
Registered User
|
|
Join Date: Aug 2007
Location: South Australia
Posts: 511
|
|
That's the idea 
__________________
Don't worry what other people think, they don't do it very often.
Alfa 75 Potenziata, Twincharged AW11 MR2, RB20DET S13 Silvia
|
10-12-2009, 02:20 AM
|
|
Registered User
|
|
Join Date: Jun 2008
Location: Adelaide SA
Posts: 392
|
|
|
cool thanks . wasnt to sure how advanced that jaycar unit was.
i might have a good update on my page in the next week or two. might even start up a fresh thread
__________________
"Alfa Romeo built to excite .. Some dream of driving the ideal.. I drive it"
|
10-12-2009, 11:24 PM
|
 |
Registered User
|
|
Join Date: Nov 2005
Location: san francisco
Posts: 246
|
|
Quote:
Originally Posted by Duk
Log manifolds have no place on any turbo engine. Why restrict your engine with a poor flowing manifold? It is all about flow, both in and out.
|
I'm not saying that i'm a turbo expert but with a rinky dink cast manifold and not breaking the bank i've been able to make over 500 hp on my other non alfa vehicle. Yes i've also had a custom exhaust made and it just make too much heat. Tell me would that be suitable on a daily driver? and i used to daily drive it.
Making power takes money but not all the time do you have to be stupid and spend over $1000 for a custom built manifold and expensive parts.
|
10-13-2009, 12:32 AM
|
|
Registered User
|
|
Join Date: Aug 2007
Location: South Australia
Posts: 511
|
|
Quote:
Originally Posted by chelo
Your going to tell me that a 2.5" exhaust is too restrictive too?
|
Quote:
Originally Posted by chelo
Have you actually done back to back dyno? I certainly agree with you that a log manifold will not outflow an expensive equal length exhaust manifold. But making a statement that a log manifold has no place on a turbocharged car is pure bs. The man is trying to make a his car turbocharged on a budget.
|
I don't need to do back to back dyno testing. I always aspire to do as much research as I can, listen to those who have done the testing (and know much more than me on the subject) and think for myself. A flow path must be smooth and continuous for it to be efficient. As the old engineering saying goes: "If it looks wrong then it probably is wrong."
I am also trying to offer advice that I believe will help him get his buget turbo upgrade done well, without costing him a packet. Cheep doesn't have to meen nasty.
Quote:
Originally Posted by chelo
I'm not saying that i'm a turbo expert but with a rinky dink cast manifold and not breaking the bank i've been able to make over 500 hp on my other non alfa vehicle. Yes i've also had a custom exhaust made and it just make too much heat. Tell me would that be suitable on a daily driver? and i used to daily drive it.
|
Congratulations. WTF is "rinky dink"? Are you refering to a factory turbo engine manifold? If you are, as I said previously, most factory manifolds are not the simplistic log manifold that get manufactured by some people, they have much more attention to gas flow direction to prevent ports simply pointing at each other. Atleast the 1s I've seen on my Nissan engine and the Ford Falcon XR6 turbo are. If it is a log manifold, how much power would it make with a well designed manifold???
Quote:
Originally Posted by chelo
Making power takes money but not all the time do you have to be stupid and spend over $1000 for a custom built manifold and expensive parts.
|
Yes making power does cost money, but doing a job twice costs more money.
As I wrote before, I made a log manifold for 1 of my cars because of space restrictions. I then used that manifold to make a jig to (start to) make a decent collector based manifold. How much would I have been able to save in time and money if I had been able to make the manifold propperly the 1st time? And, BTW, that's with me doing all the work, I don't pay many people to work on my cars.
__________________
Don't worry what other people think, they don't do it very often.
Alfa 75 Potenziata, Twincharged AW11 MR2, RB20DET S13 Silvia
|
10-14-2009, 11:28 PM
|
 |
Registered User
|
|
Join Date: May 2009
Location: Adelaide, Australia.
Posts: 88
|
|
|
ok so finally some progress,
today i purchased a brand new t3/t4 turbo, a manifold and a boost gauge.
the manifold is stainless steel and off an old toyota motor but seller said the ends are about 5 mm out so will - make a new flange to suit alfa, cut and re-weld the pipes so they fit,
now all i need is a intercooler, ingntion and carbs.
brad
__________________
83 GTV (red), 79 GTV (white), 85 GTV (red) (parts donor)
Last edited by BradGTV; 10-14-2009 at 11:56 PM.
|
10-15-2009, 12:03 AM
|
|
Registered User
|
|
Join Date: Jun 2008
Location: Adelaide SA
Posts: 392
|
|
|
how much did all this set u back??
that is the exact same turbo i am going to use. its a pretty big one for a 4cyl..
external or internal wastegate ?
__________________
"Alfa Romeo built to excite .. Some dream of driving the ideal.. I drive it"
|
10-15-2009, 01:16 AM
|
|
Registered User
|
|
Join Date: May 2009
Location: Adelaide, Australia.
Posts: 88
|
|
|
it adds up to ruffley $500 for everything,
im pretty sure it a external wastegate,
__________________
83 GTV (red), 79 GTV (white), 85 GTV (red) (parts donor)
|
10-15-2009, 01:22 AM
|
|
Registered User
|
|
Join Date: May 2009
Location: Adelaide, Australia.
Posts: 88
|
|
|
as for carbies i now have two options,
is to bye a turbo conversion kit from motorcyclecarbies.com for $200
or bye a pair of dellortos from bennica for $500,
what do u guys think? the kit or a fully built carbie?
i think the carbie casue they are new and done by a professional.
__________________
83 GTV (red), 79 GTV (white), 85 GTV (red) (parts donor)
|
10-15-2009, 01:36 AM
|
|
Registered User
|
|
Join Date: Jun 2008
Location: Adelaide SA
Posts: 392
|
|
|
oh yea did u get them from adelaide?? the manifold is external and the turbo looks as well but what did the internal wastegate some off ?
does that turbo kit come with jets etc and all that?
if u really want i have the rebuild/seal kit and top hats.
or u could spend double that and buy the carbies
__________________
"Alfa Romeo built to excite .. Some dream of driving the ideal.. I drive it"
Last edited by Storm_X; 10-15-2009 at 01:43 AM.
Reason: i must b drunk
|
10-15-2009, 03:08 AM
|
|
Registered User
|
|
Join Date: May 2009
Location: Adelaide, Australia.
Posts: 88
|
|
|
no they were in queensland,
this is the turbo conversion kit - "Dellorto DHLA Turbo Conversion Kit
Dellorto Part # DHLAturbokit
This kit contains the parts required to convert a normally aspirated DHLA carburettor to turbo use.
Genuine factory supplied gasket set with rubber gaskets and spindle seals.
Spindle seal retaining washer -the body needs to be machined to accept these
Viton tipped turbo spec. needle valve - uprated spring pressure, size 200.
Turbo jet cover / inlet."
is your kit similar?
__________________
83 GTV (red), 79 GTV (white), 85 GTV (red) (parts donor)
|
10-15-2009, 03:34 AM
|
|
Registered User
|
|
Join Date: Jun 2008
Location: Adelaide SA
Posts: 392
|
|
|
my kit is axactly the same . but it come with another seal thing that goes on the very bottom of the carbie. but yea exactly the same but with and extra seal as what i can see
__________________
"Alfa Romeo built to excite .. Some dream of driving the ideal.. I drive it"
|
10-15-2009, 03:44 AM
|
|
Registered User
|
|
Join Date: May 2009
Location: Adelaide, Australia.
Posts: 88
|
|
Quote:
Originally Posted by Storm_X
oh yea did u get them from adelaide?? the manifold is external and the turbo looks as well but what did the internal wastegate some off ?
does that turbo kit come with jets etc and all that?
if u really want i have the rebuild/seal kit and top hats.
or u could spend double that and buy the carbies
|
so is ur turbo delloroto kit for sale? if so how much?
__________________
83 GTV (red), 79 GTV (white), 85 GTV (red) (parts donor)
|
10-15-2009, 03:49 AM
|
|
Registered User
|
|
Join Date: Jun 2008
Location: Adelaide SA
Posts: 392
|
|
|
i will take a photo tomorrow for you if u are intrested and intercooling piping
__________________
"Alfa Romeo built to excite .. Some dream of driving the ideal.. I drive it"
|
| Thread Tools |
|
|
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
|
