Holtzman Black turbo spring

[Vectorboost]

i did but not after i cleaned carbs and re synced them.

 

[Vectorboost]

Red ones seemed to work great, what am i going to gain from the black spring?

 

[rxrider]

Hard to tell, I have not run the red ones, only the blacks. My hope was that you had and had some info to share.
Are the red ones softer or harder than the blacks?
The blacks are way stiffer and longer than the Stock springs, it takes more to lift the slides.
The needle lifts less delivering less fuel early on.
If the reds are softer than the black ones I recommend you give the blacks a try.

 

[Vectorboost]

Red ones are super soft about same length as stock , blacks are way stiffer and shorter than stock.With the reds the motor revs out really fast, seems to spool the turbo faster since its dumping more exhaust. Now that the sled is running good i will throw the blacks back in and report back.

 

[rxrider]

Thanks