4-cylinder turbo performance

Jim K
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Re: 4-cylinder turbo performance

Post by Jim K » Thu Nov 04, 2010 11:59 pm

:twisted: :mrgreen: :wall: :?: :?: ISN'T THAT WHAT THE ENTIRE WORLD IS DOING?????
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Mats
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Re: 4-cylinder turbo performance

Post by Mats » Fri Nov 05, 2010 10:45 am

8)
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Maurizio
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Re: 4-cylinder turbo performance

Post by Maurizio » Sat Nov 06, 2010 2:47 pm

:evil: evilbay... I didn't get the engine
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wirno
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Re: 4-cylinder turbo performance

Post by wirno » Mon Jan 17, 2011 5:45 am

Hi Guys,

Just finishing reading the 11 pages, I want to do the same to my ts.
But then with a rotrex.

Specs

Je Pistons 8.5-1
Rotrex c30-94
Copper gasket.
Oring my liners
Intercooler 600*300*60

Stock con rods
Stock intake
Stock cams/Head

Mangement KMS
Fuel 128 octane (cheap)

All the bits and pieces must be in this week.

I want a reliable engine for track use (n'ring) aim 275 HP

Please give comments for the do's and DON'T s

Can not find a new oil-pump for a reasonable price, does anyone have a address?

Arno.


PS can someone supply me with detailed pics of a autodelta/alfa corse dedion axle.
My next project.
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Re: 4-cylinder turbo performance

Post by Greg Gordon » Mon Jan 17, 2011 8:28 am

My don't comment is, don't use the Rotrex, or any other centrifugal on an Alfa 4cyl.

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la_strega_nera
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Re: 4-cylinder turbo performance

Post by la_strega_nera » Mon Jan 17, 2011 1:27 pm

Do use a Garret :)
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Duk
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Re: 4-cylinder turbo performance

Post by Duk » Tue Jan 18, 2011 1:47 am

la_strega_nera wrote:Do use a Garret :)
Didn't Greg just tell you NOT to use a centrifugal on an Alfa 4??? :P :P :P :wall:
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Re: 4-cylinder turbo performance

Post by Greg Gordon » Tue Jan 18, 2011 9:16 am

Well, I meant a centrifugal belt driven compressor. An exhaust driven compressor doesn't have the same problem because the compressor speed is NOT fixed in relation to engine speed. I can make a great argument for Roots or Lysholm design superchargers, or for turbochargers. There is no way to make a good argument for a centrifugal supercharger on these engines, at least not one based on performance.

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Re: 4-cylinder turbo performance

Post by Duk » Tue Jan 18, 2011 5:16 pm

Greg, Greg, Greg. I thought you would have picked up on my tongue in cheek humor :D .
Pretty sure that la_strega_nera would have :wink:
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Re: 4-cylinder turbo performance

Post by MR2 Zig » Tue Jan 18, 2011 9:29 pm

tacky, tacky, tacky




:lol:
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Re: 4-cylinder turbo performance

Post by Greg Gordon » Wed Jan 19, 2011 7:29 am

Hi Duk, Yup, I am a little dense sometimes! I just have this reflex action, when someone says Alfa and centrifugal in the same sentance, I say NOOO, not unless you want to lose to every other forced induction car on the road.

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Re: 4-cylinder turbo performance: Something new!

Post by Jim K » Fri Jan 28, 2011 11:20 pm

Its been a long time since some new hardware has been presented anywhere for the 1.8T engine. Well, after some deliberation with Paul Spruell and CP, here is a new forged piston for these engines, which will accept the well-proven factory rings. Slight valve cutouts are evident and CR is 8:1 (std CR is 7.5:1). Weight is 448gr, 11gr less than the std items. Here are a couple of pics from the first production set I got yesterday next to a std new piston. P.Spruell has been instrumental in seeing this project through and he plans to delve further into the 1.8T and TS parts world soon.
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Jim K
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Re: 4-cylinder turbo performance

Post by Jim K » Fri Jan 28, 2011 11:35 pm

Ok, we all know the 1.8T can make lots of power. If components are not up to par, things sometimes break, but I didn't ever think I would see something like the pictured item! The particular 1.8T has ~280 wheel hp and 38kgm (275ftlbs) of torque. The owner loves stoplight rubber and apparently the std flywheel has had enough! I am amazed at the way it btoke! I suppose too much traction did this but G.Gordon would know more about this! :wink:
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Re: 4-cylinder turbo performance

Post by Giuliettaevo2 » Sat Jan 29, 2011 1:11 am

:shock:

That must have been a scary experience for the driver...
Drive it like you stole it...
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Mats
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Re: 4-cylinder turbo performance

Post by Mats » Sat Jan 29, 2011 2:02 am

And this is why I always warn people about drilling holes in a cast flywheel...

Imagine that happening at 200Km/h, it would take a while before you think to depress the clutch I'd say...

Pistons look sturdy, looks like quite a lot of squish though, comments?
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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