Air Gun Home :: View topic - Tuning a quest and looking for some numbers

SMP · Silver Status Member

We just picked up a new quest from Scopes and Ammo today which is destined to be the Mrs' plinker (Once again I can't say enough about Erics awesome service, he got everything together while sick with the flu)

So It's already been stripped to pieces and degreased and ready for deburring and honing. I have both possible pistons and both possible springs in inventory.

Has anyone tried all the possible combinations and recorded the numbers.

AirGunEric · Site Admin

A Quest 500 spring and Quest 1000 piston will get somewhere are 750fps, a Quest 500 spring missing a few extra coils would bring it down to around 680fps- but it might start getting pretty noisy internally. A Quest 500 vented piston and a Quest 1000 spring might net you 540-ish fps (can't prove that, however), A Quest 500 elongated piston and Quest 1000 spring would be around 560 or so. I am unaware of anyone ever trying to get in the 550-650range specifically, but it appears the best way would be to custom-shorten an elongated Quest 500 piston mid-way in length between its stock length and that of the Quest 1000.

SMP · Silver Status Member

He Lives !!!!

Thanks Eric, that's genius.

The lube tune is done and the first ten shots produced a ragged hole. It never ceases to amaze me how well these inexpensive guns perform with minimal effort.

The object I was going for was to achieve a stable velocity with heavier ammo, minimal recoil and very cockable. I went with 1000 piston and I think I will chop 2 coils.