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Tuning & Upgrades Discuss performance enhancements for your Alfa Romeo

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(Post Link) post #1 of 50 Old 18-09-14 Thread Starter
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TurboTwinSpark Guide for Noobs

Hello! I have some skills of turbocharging my jts\ts and i want to show all what i know and what i done.

First of all we need to make low compression ratio. I didnt have much money for Woessner pistons and i have ideas to cut from stock pistons some meat.

I cut 2mm from each pistons. Later i balance it with rods and pins
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(Post Link) post #2 of 50 Old 18-09-14 Thread Starter
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I found on Allegro in Poland cheap(30USD) exhaust manifold from 156 1.9JTD and cut flange. And weld needed flange.
It very good weld with MIG welding tool.
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Nice thread!

I'm wondering how you solved the oil feed, and more importantly, the oil return from turbo to the sump.
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Have you tried this yet or still building?
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(Post Link) post #5 of 50 Old 20-09-14 Thread Starter
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Quote:
Originally Posted by JS JTD View Post
Nice thread!

I'm wondering how you solved the oil feed, and more importantly, the oil return from turbo to the sump.
Oil you can yake from head, M10x1.25 banjo bolt. In head many holes with plugs. I use that, in my JTS engine(its same on TS). And second near thermostat i use for oil pressure sensor. Return - in oil sump. Just weld alumitium 20mm fitting.
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Last edited by acab; 20-09-14 at 12:39.
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(Post Link) post #6 of 50 Old 20-09-14 Thread Starter
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Have you tried this yet or still building?
I ride on my turbo GT one year.

20140603 002 - YouTube
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Do you have pictures of the manifold with the New flange?
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(Post Link) post #8 of 50 Old 22-09-14 Thread Starter
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Do you have pictures of the manifold with the New flange?
Yes, you can see it some posts ago.
Or you need photo of flange?
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Ok nice. What kind of turbo did you use?
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(Post Link) post #10 of 50 Old 24-09-14 Thread Starter
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Ok nice. What kind of turbo did you use?
I use Toyota CT20 from 2JZ-GTE engine
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(Post Link) post #11 of 50 Old 12-10-14 Thread Starter
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Almost done
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Do you still use original piston guided conrods ?
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(Post Link) post #14 of 50 Old 15-10-14 Thread Starter
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Do you still use original piston guided conrods ?
All stock
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All stock
Aren't you afraid big end (floating) bearings may fail under boost with original pistons ?

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Aren't you afraid big end (floating) bearings may fail under boost with origin pistons ?
I have seen OEM big-end bearings work up to 1.5 bar boost in V6
0.5 bar boost in TS for YEARS - 100 000 km +
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I have seen OEM big-end bearings work up to 1.5 bar boost in V6
0.5 bar boost in TS for YEARS - 100 000 km +
The v6 uses crank guided conrods. Piston guided conrods are quite rare today.
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(Post Link) post #18 of 50 Old 17-10-14 Thread Starter
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I rided on last config all summer on 1.2 bar boost and with three (!!!!!) head gaskets to low compression ratio
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Quote:
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I rided on last config all summer on 1.2 bar boost and with three (!!!!!) head gaskets to low compression ratio
Did you use the CF3 metal headgaskets (thin) or the CF2 fibre headgaskets (thick)?
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Did you use the CF3 metal headgaskets (thin) or the CF2 fibre headgaskets (thick)?

I make sandwich with 3 gaskets: 0.4+1.9+0.4 mm
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I make sandwich with 3 gaskets: 0.4+1.9+0.4 mm
Makes sense.
So CF3 and CF2 gaskets are strictly compatible ? I'd use the CF3 one to increase my CR .
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Makes sense.
So CF3 and CF2 gaskets are strictly compatible ? I'd use the CF3 one to increase my CR .
If you have a CF2 engine and you fit a CF3 head gasket the valves will clip the pistons!
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If you have a CF2 engine and you fit a CF3 head gasket the valves will clip the pistons!
No I was talking about just using CF3 gasket on a CF2 engine. Are they strictly compatible ?
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Quote:
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No I was talking about just using CF3 gasket on a CF2 engine. Are they strictly compatible ?
You can use a CF2 gasket on a CF3 engine to lower compression, but you can't use a CF3 gasket on a CF2 engine to raise CR because it makes the pistons touch the cylinder head at TDC.
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How much clearance is there between the piston and the head on a cf2 engine ?
A few weeks ago I was talking with somebody about the possibility of fitting a cf3 gasket ond a cf1/2 engine. Ofcourse we know that you just can't use the cf3 gasket because the pistons will hit the head. We were thinking to skim 1 mm of the cf2 piston and use a cf3 gasket to raise compression.
ACAB said that the cf2 gasket is 1,9mm and the cf3 is 0,4mm. So if you use a 0,4 mm gasket you win 1,5mm but that's clearly to much. But how much is enough to clear the piston from the head ? If you skim 1 mm from the piston you win 0,5mm...
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