[silver92gt]

Can I use these valve springs with stock cam, stock heads with 1.7 crane RRs?
Trick Flow Specialties TFS-2500100 - Trick Flow® Valve Spring Upgrade Kits

[svnt442]

This is from the Trick Flow site.

You should be good to go.

Recommended Camshaft StyleFlat tappet hydraulic
Installed Height (in)1.800 in.
Seat Pressure at Installed Height (lbs)110 lbs.
Open Height (in)1.250 in.Open Pressure (lbs)257 lbs.
Application Notes Will work with hydraulic roller camshafts up to 0.520 in. lift.

[Masshole]

If you want you can...usually upgraded springs are for hotter than stock cams...in order to avoid valve float.

[svnt442]

That is true, but you have to consider that these cars are getting old and the original springs are probably starting to wear out a bit.

[ITLRUN]

No, your better off changing your cam, and springs. Stay away from the 1.7 R.R's, unless you check your clearance between piston to valve you may have an issue. You also have to change, your push rods they're a different length, Mike SCT Tuner.

[silver92gt]

I have another question.. Can having old and maybe worn out valve springs hurt 1/4 mile times???

[Joel5.0]

Yes..... valve springs is the most overlooked upgrade in a an engine. 1.7 rockers, or any increase in valve lift, will not cause any PtV problems. If it clears with 1.6 rockers, it will clear with 1.7 or 1.72 rockers.