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Mats
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Re: 4-cylinder turbo performance

Post by Mats »

jamal555 wrote:nice, i didnt know turbos were made with narrow stripe... or normal bumpers...

a saw few in italy with normal bumpers...

mine is the amerika model with wide ts strip and heavy suspended bumpers... that are coming off in near future... :)

this was actually series 1 turbo... 1986-87? mine is from december 1989...
Yes, -86 and -87 was the light bumpers. That's the one to have. :wink:
Mats Strandberg
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Re: 4-cylinder turbo performance

Post by Jim K »

Yes, these are the 1st series 'lighter' cars and can be lightened even more and retain their street character. Nice big trunk, since they had the std 49lt gas tank.
The other pic is the big-power 1.8T in Athens, which supposedly still has std rods/pistons for more than 500hp!
Jim K.
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Re: 4-cylinder turbo performance

Post by Greg Gordon »

It's nice to see SDS engine management has made it all the way over to Greece!

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Re: 4-cylinder turbo performance

Post by jamal555 »

ok since we are on the topic of turbos...

does anyone know what is max hp stock manifold on 1.8t is good for...

some say ~250 hp some 220... even heard of one doing 300 on stock...

Mat said they all crack? mine is still good after 125k km...

stock would have superior spool compared to EL... maybe its insignificant difference... idk...

any1 know firsthand?
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Re: 4-cylinder turbo performance

Post by Mats »

I thought mine was good too, until I removed it from the engine and had a look at the bottom side of it... :shock:
Mats Strandberg
-Scuderia Rosso- Now burned to the ground...
-onemanracing.com-
-Strandberg.photography-

GTV 2000 -77 - Died in the fire.
155 V6 Sport -96 - Sold!
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Giuliettaevo2
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Re: 4-cylinder turbo performance

Post by Giuliettaevo2 »

stock manifolds crack... evo manifolds also crack unless you modify them. you have to cut a half moon shaped piece out of the divider piece inside the manifold. :wink:
Drive it like you stole it...
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Re: 4-cylinder turbo performance

Post by GarthW »

Performance will be fantastic with a turbo 1.8 i'm going to boost my Fiat 132 in the future and its gonna fly without too much
or anything, 12psi will be plenty with some good injectors and an Adaptronic ecu. :P 8)
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Selling 1985 GTV6.

Ecu and injectors, lightened.....plays music.
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Re: 4-cylinder turbo performance

Post by jamal555 »

Anyone know where to get equal length manifold for 1.8t... i'm pretty sure i can't make it myself, tried... didnt go well...

Does anyone actually make these? I mean professionally, something worth putting in your car...
I can find lots of manifolds for other cars... but for alfas... not so much...
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Re: 4-cylinder turbo performance

Post by Mats »

What's your budget?
Mats Strandberg
-Scuderia Rosso- Now burned to the ground...
-onemanracing.com-
-Strandberg.photography-

GTV 2000 -77 - Died in the fire.
155 V6 Sport -96 - Sold!
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Re: 4-cylinder turbo performance

Post by MD »

If you know where you want the torque, top or bottom and know what application the car is being put to ie street ,rally or racing then why is it so hard to front up to a mechanical workshop specialising in hand fabrication of exhaust systems and use the magic words..."just make the fkkrs"

You don't live in Bagdad do you? If you are going to seriously modify Alfas , you will learn that many things don't just come off the shelf. That's what makes them the challenge..
Transaxle Alfas Haul More Arse
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Re: 4-cylinder turbo performance

Post by Duk »

MD wrote:If you know where you want the torque, top or bottom and know what application the car is being put to ie street ,rally or racing then why is it so hard to front up to a mechanical workshop specialising in hand fabrication of exhaust systems and use the magic words..."just make the fkkrs"

You don't live in Bagdad do you? If you are going to seriously modify Alfas , you will learn that many things don't just come off the shelf. That's what makes them the challenge..
Making a good turbo exhaust manifolds, especially for the angle flanged Alfa heads, is a lot more work than most people realise. And making 1 that is long term durable gets expensive when you start paying some bloke with a nice and expensive TIG welder who should be pumping sheilding gas both inside and outside of the manifold when welding. Add the 'fun' to do machining costs after welding the flanges (figuring out how to clamp the manifold to a milling machine table is the 'fun' part), and epense's get high.
Think 20-40 hours work making a 1 off manifold. Using Ozzy dollars and a conservative $50 an hour "just make......." isn't in everybodies budget.

But if you can make a jig to suit your custom set up. If you can get the head flange propperly made with the angle cut ports. If you can make a decent collector and can make the individual pipes with weld prep chanfers (chamfers should be 2/3 of the pipe wall thickness) wherever 2 pieces join and can either tack them your self or even tape them together for later welding, then you can do a lot of the time consuming work that is within the skills of most hands on petrol heads.

BTW, only use 'steam pipe'. It's actually only a thicker wall (about 3mm) pipe than normal water pipe (it's also not galv. plated :wink: ) and the bends (at least here in Oz) get reffered to as 'butt weld fittings/bends'.
Stainless just doesn't have a good reputation for long term durabillity and will cost 2-4 times as much in materials.

Don't waste your time building a 'log' manifold. They are the easiet to make, but they are the crappest flowing pieces of junk that will limit your engine badly and will cause even more heat retention due to their poor flowing abillity. People that say they are fine, either have no idea or are just lazey. I know they are crap, I have 1 on 1 of my cars. Yes, I've been lazey :oops: .

Don't use MIG welding to weld your manifold. It's quick and easy, but MIG welding lacks weld penetration and is a rather 'stressed' weld. To see what I mean, put 2 pieces of metal together and add a small tack to join them. Then watch and see how far the 2 pieces move when the weld cools.
In heavy industry, it is only TIG and Arc welding tht are used in pressure vessle welding. MIG has it's place but it's not here.

I have welded manifolds together with my Henrob 2000 Oxy/Accetylene torch. The excellent thing about this is that it is a very ductile weld (the complete opposit of the MIG weld) and, when done right, gets full penetration. It also is also a very clean, oxide free weld. The only bad thing is the amount of heat that you get subjected to when welding.

But I whole heartedly agree with MD about the challenging part.
Owning a Nissan Silvia, probably 1 of the most supported cars in the after market performance industy, is/was boring compared to the Alfa.
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Re: 4-cylinder turbo performance

Post by Jim K »

Just doing some light fixing/correcting/detailing work on the 'new' Turbo. Today I replaced the stock ignition ecu with another one which has a 1.4bar chip, instead of the std 0.65bar and went for a drive...hoooly $hiiit :shock: There is no other na Alfa that can give you this push on your a$$, I don't care what you've done to it! If the factory boost gauge reads well, I had ~1.3bar with 3rd gear going seriously uphill. Other than this, the engine is 100% std. Of course I suspect it wouldn't last long in the 'Ring for example, and other engine mods must complement increased boost.
Lets see now...27.3mm tb's and front anti-sway are on their way, all Superflex bushes are already here as well as harder springs and all ball joints. I calibrated the tach yesterday, put champion N2C plugs on and a Marelli BK3 coil. The new LCA spacers are done (27mm thick in place of 22.5mm) and I already secured a complete power steering set from another 75. As good luck (rarely) goes, a friend is junking his 75 and I'm getting the prized Recaro interior although the driver's seat needs redoing...that's a problem as the fabric doesn't exist. Any suggestions here?
Oh, one of the most important mods....making a new prop rod for the hood so it opens much higher! The original item must've been designed by midgets who were probably working on the car's design stage! When you bang your head a few times on the hood or that fkkn latch, you WILL think of a solution!
All in all, this will turn out to be a very nice road car -if I get to keep the engine too (some bickering with the previous owner)!
Jim K.
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Re: 4-cylinder turbo performance

Post by Duk »

How about a high pressure water spray for the intercooler: http://autospeed.com/cms/A_2720/article.html http://autospeed.com/cms/A_2719/article.html

Water injection? Enclose the intercooler and turn it into a water to air unit? Bigger airflow meter? A nice ram air feed for the air inlet? New ball bearing turbo? Battery in the boot/trunk? Swap for my Potenziata :wink: ?
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Re: 4-cylinder turbo performance

Post by Jim K »

I was talking about my second 1.8T car. The first one will also be a road car but with more track capability. It has a water/ait IC and Cosworth/Marelli remapped management (no afm). Both cars are red first series models and the first will have the UK Veloce body kit plus entire 'glass fenders, hood and deck lid. Suspension will be all RSR with 27.3mm tb's. We'll see how it turns out in a few months when the engine will be finished (no rush there).
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Re: 4-cylinder turbo performance

Post by Mats »

I have a set of new 30mm tb's and no car to put them on... :?
Mats Strandberg
-Scuderia Rosso- Now burned to the ground...
-onemanracing.com-
-Strandberg.photography-

GTV 2000 -77 - Died in the fire.
155 V6 Sport -96 - Sold!
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