Page 11 of 27
Re: 4-cylinder turbo performance
Posted: Fri Nov 05, 2010 10:45 am
by Mats
Re: 4-cylinder turbo performance
Posted: Sat Nov 06, 2010 2:47 pm
by Maurizio
![Evil or Very Mad :evil:](./images/smilies/icon_evil.gif)
evilbay... I didn't get the engine
Re: 4-cylinder turbo performance
Posted: Mon Jan 17, 2011 5:45 am
by wirno
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.
Re: 4-cylinder turbo performance
Posted: Mon Jan 17, 2011 8:28 am
by Greg Gordon
My don't comment is, don't use the Rotrex, or any other centrifugal on an Alfa 4cyl.
Greg
Re: 4-cylinder turbo performance
Posted: Mon Jan 17, 2011 1:27 pm
by la_strega_nera
Do use a Garret
![Smile :)](./images/smilies/icon_smile.gif)
Re: 4-cylinder turbo performance
Posted: Tue Jan 18, 2011 1:47 am
by Duk
Re: 4-cylinder turbo performance
Posted: Tue Jan 18, 2011 9:16 am
by Greg Gordon
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.
Greg,
www.hiperformancestore.com
Re: 4-cylinder turbo performance
Posted: Tue Jan 18, 2011 5:16 pm
by Duk
Greg, Greg, Greg. I thought you would have picked up on my tongue in cheek humor
![Very Happy :D](./images/smilies/icon_biggrin.gif)
.
Pretty sure that la_strega_nera would have
![Wink :wink:](./images/smilies/icon_wink.gif)
Re: 4-cylinder turbo performance
Posted: Tue Jan 18, 2011 9:29 pm
by MR2 Zig
tacky, tacky, tacky
![Laughing :lol:](./images/smilies/icon_lol.gif)
Re: 4-cylinder turbo performance
Posted: Wed Jan 19, 2011 7:29 am
by Greg Gordon
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.
Greg
www.hiperformancestore.com
Re: 4-cylinder turbo performance: Something new!
Posted: Fri Jan 28, 2011 11:20 pm
by Jim K
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.
Jim K.
Re: 4-cylinder turbo performance
Posted: Fri Jan 28, 2011 11:35 pm
by Jim K
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!
Jim K.
Re: 4-cylinder turbo performance
Posted: Sat Jan 29, 2011 1:11 am
by Giuliettaevo2
That must have been a scary experience for the driver...
Re: 4-cylinder turbo performance
Posted: Sat Jan 29, 2011 2:02 am
by Mats
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?