4 replies to this topic

[TRS666]

Building a set of double HS4 i found in my boxes. Not able to find my Vizard bible so hope someone here can get me a starting point which needles and springs a should use to get running. Not looking to get out the last HP but a good fast street drivability. Engine spec is 1293 PRE A+, Longman stage 3 head (i think it was called so when i bought it 1990, or was it "full race"?), MS EVO 001 cam, LCB with homemade 2" exhaust. Intake is a homemade modification of an old Cooper 2xHS2 intake. K&N panncake filters. 

[timmy850]

Are the fixed needle HS4 or do they use bias sprung needles?

The Aus police spec Cooper S used CP4 fixed needles

Vizard suggests the following fixed needles for 1275 in increasing level of power. All with a blue spring, but BG could try blue or red
3
4
BG

Edited by timmy850, 26 July 2026 - 12:57 AM.

[Cooperman]

You could try starting with AAA needles and go from there.

[TRS666]

Are the fixed needle HS4 or do they use bias sprung needles?

The Aus police spec Cooper S used CP4 fixed needles

Vizard suggests the following fixed needles for 1275 in increasing level of power. All with a blue spring, but BG could try blue or red
3
4
BG

Thanks. They are with fixed needles. 

[Lplus]

 

Are the fixed needle HS4 or do they use bias sprung needles?

The Aus police spec Cooper S used CP4 fixed needles

Vizard suggests the following fixed needles for 1275 in increasing level of power. All with a blue spring, but BG could try blue or red
3
4
BG

Thanks. They are with fixed needles. 

 

+1 for CP4 needles and blue springs.  I've used them in H4s many years ago on a 1293 with a 948 cam and presently use them in HIF4s on a 1293 MG metro engine.  They do have to be modified to bias type for HIF4s.