205 GTI vs Si camshaft

schlitzaugen

schlitzaugen

Well-known member
1000+ Posts
Fellow Frogger
Joined
Nov 10, 2010
Messages
12,735
Location
loneliness capital of the world
I failed trying to find on the web what is the cam profile for the GTI vs the SI grinds and the manuals I have are adamant at saying nothing about it.

Anyone know where to find this info? A reliable source?
 
There are quite a few GTi camshafts.
ie
105 hp 1.6L
115 hp 1.6L
130 hp 1.9L D6B
122 hp 1.9L DKZ
105 hp 1.9L DFZ

I can't recall all the details but I know this (inlets):

Si - 0.380" lift
DFZ - 0.405" lift, 218 @ 0.050"
DKZ - 0.445" lift, 220 @ 0.050"
D6B - 0.445" lift, 226 @ 0.050"
 
PeterT said:
There are quite a few GTi camshafts.
ie
105 hp 1.6L
115 hp 1.6L
130 hp 1.9L D6B
122 hp 1.9L DKZ
105 hp 1.9L DFZ

I can't recall all the details but I know this (inlets):

Si - 0.380" lift
DFZ - 0.405" lift, 218 @ 0.050"
DKZ - 0.445" lift, 220 @ 0.050"
D6B - 0.445" lift, 226 @ 0.050"
Click to expand...

Hmmm. Isn't the Si the same thing as DKZ?
 
Found this

Capacity 1580cc 1580cc 1580cc 1905cc 1905cc 1905cc
No. XU5J - 180A XU5JA - B6D XU5JA/K - B6E XU9J1 - DFZ XU9JA - D6B XU9JA/Z - DKZ
Years 1984-1986 1986-1992 1986-1992 1989-1993 1986-1992 1989-1994
Bore (mm) 83 83 83 83 83 83
Stroke (mm) 73 73 73 88 88 88
Compression Ratio 9.8:1 9.8:1 9.25:1 8.4:1 9.6:1 9.2:1
Power (DIN)105bhp @ 6250rpm 115bhp @ 6250rpm 115bhp @ 6250rpm 105bhp @ 6000rpm 130bhp @ 6000rpm 122bhp @ 6000rpm
Torque 99lb.ft @ 4000rpm 98lb.ft @ 4000rpm 98lb.ft @ 4000rpm 101 lb.ft @ 4000rpm 119lb.ft @ 4750rpm 111lb.ft @ 4000rpm
Fuel Injection Bosch Multipoint LE2 Jetronic Bosch Multipoint LE2 Jetronic Bosch Multipoint LU2 Jetronic Bosch Multipoint LU2 Jetronic Bosch Multipoint LE2 Jetronic Bosch Multipoint Motronic M1.3
Idle (rpm) 850 - 900 850 - 900 850 - 900 850 - 900 850 - 900 850 - 950
Fuel Type 95 RON Regular95 RON Regular 95 RON Regular 95 RON Regular 98 RON Super 98 RONSuper

Camshaft Specifications:

Engine Type 1.6 XU5JA 115 bhp 1.9 XU9JA 130 bhp
Lift 11.5 mm 9.7mm
Inlet opens 8 deg BTDC 11.5 deg BTDC
Inlet closes 42 deg ABDC(duration 230 deg) 43 deg ABDC(duration 234.5 deg)
Exhaust opens 40.5 deg BBDC 46 deg BBDC
Exhaust closes 2.5 deg ATDC(duration 223 deg) 2 deg ATDC(duration 228 deg)
 
Last edited:
schlitzaugen said:
I thought all 205Si had DKZ engines?
Click to expand...

No, Sis are 1.6 with Marelli Monopoint injection.
The DKz is the later 1.9 fitted to S3 205s and late series 1 405s, also Citroen BX TZi and TRi122.
As I said before the Si head and block are the same as DKz, but the crankshaft, pistons, rods and cam are different.
You would need to get a set of DKz pistons and rods and a camshaft to make a DKz from the parts I sent you. Plus the Motronic injection system.
Graham
 
What is different about the crank? The stroke seems to be the same for DFZ and DKZ engines.

Also, the compression is higher in DKZ engines, but I thought that was because of the different head (and perhaps pistons) so not sure if rods would need to be different too? What is difference, anyway?
 
Last edited:
schlitzaugen said:
What is different about the crank? The stroke seems to be the same for DFZ and DKZ engines.

Also, the compression is higher in DKZ engines, but I thought that was because of the different head (and perhaps pistons) so not sure if rods would need to be different too? What is difference, anyway?
Click to expand...

Yes, same for DFZ and DKZ but different for the Si. The rods need to be shorter on the 1.9s as the piston pin to crown height is the same for 1.6 and 1.9.
Compression higher on the DKZ because of the head/piston combination.
You get even higher compression by using a DKZ/Si head with DFZ/Si pistons (with 1.9 crank of course) but I'd recommend using the DKZ pistons.
These are available new from Caravelle for around $500.
Graham
 
You must log in or register to reply here.
Top