Thread: S4 cams in rwd SR20DET blackt top with VTC?

Friend of mine with S14 "Black Top" SR20DET with VTC want to run JWT S4 cams. Is it plug and play or he need to modify cams or something else? Thanks.

If he puts S4s in his S14 he will need to disconect the VTC as they are not designed to work that way.

When you look at S14 cams you will see that these cams are made specific for the S14 and not the S13

The S14 will run like crap with the VTC connected as the timing will be way out of range.

yeah to truely take advantage of the s4's you will have to disconnect that vtc. They are already made to be set in as is and make craploads of power all over the entire power band. My buddy loves them in his s13 redtop with an s15 turbo, even at 8psi it moves but then again i had s4's in my jdm 9.5:1 with that same s15 turbo and at a mere 9psi i was well into the 11's in my 2100 b13, just ask the 12.0 04 cobra and the 11.9 zo6, hahahaha

So the next question here, can I take BC S14/S15 specific cams and put them in a FWD avenir engine?

IIRC RWD SRs also run a larger Cam Bolt. Cam Gears should fit fine but you'll need a pair of FWD SR Cam Bolts to bolt them on.

What do you mean by cam bolt? The same cam gears work for either cars besides the s14 and s15 having different cam gears due to the vtc. If you are talking about the bolts that hold the cam gears on they are the same between the s13 and fwd sr's. Any rwd s13 cam will work for the fwd cars, the dowel pin is longer on the ex cam but doesnt need to be modified to work for us. If you have a s13 engine and want fwd cams you may need to put in the longer dowel pin.

As for the rwd s14/15 cams i am not quite sure. Andreas miko may be able to answer that one for you. I dont have any experience with s14/15 vtc cams.