when we tor into my engine last weekend we began to transfer the ITR yellow outer/porflow inner springs over to the new head and noticed something. One of the inner springs was BROKEN! has this happened to anyone else or was this just my personal misfortune? Is it a good idea to run a static spring with the progressive stock outer? I know this is good for a drag motor, I am not convinced that this spring was made for the street. can anyone weigh in here?



[Modified by MikeSarr_GSR, 9:07 AM 8/22/2002]

 

Havent heard of this incident happing to others with Portflows springs....but I have heard of Portflows retainers wearing thin, so thin you can bend it with your bare fingers.

 

all I know is that one of them broke

 

actually those retainers the poster finally determined to be the DPR retainers and NOT Portflows.

To orig poster, whcih cams were you using ? I've done a lot of the portflows and never saw this happen. Try giving Tom a call at 310 257 0351 and let him know, 1st he'll ask which cam because maybe you were coil binding or your valve seat was shot ... I've sure he'd have to problem replacing one spring instead of you having to buy a new set.

Greg

 

they were running on CTR cams in a GSR with stock LMAs if that helps

 

are portflow springs and retainers ok for the streets?

 

Valve springs are the most highly stressed part in a car and need to be handled VERY carefully. ANY tiny scratch is a stress riser and they're guaranteed to break there.