1.5 stock rockers to 1.7 Roller rockers

**Lawhead** · 12-22-2010, 07:25 PM

Well I'm looking at 1.6RR today and seen there are 1.7RR for the SBC and got to thinking if I am going to change the the springs why not get them good for a 1.7RR i mean it adds more lift to the cam but isn't a huge amount to where i think the stock LT1 heads would hold em back.

So what do you guys think?
Doing that and the LS1 Lid with some DR's and see how much it helps

**95formula383lt1** · 12-22-2010, 08:28 PM

need taller valve covers with 1.7s

**WarBird** · 12-22-2010, 08:44 PM

heres some debating for ya Mr.McLawdawg
http://www.ls1tech.com/forums/lt1-lt...vs-1-7-rr.html

**GreenZ96** · 12-22-2010, 08:53 PM

I have 1.7's with stock heads and the cc503 cam. I had 1.65's but they were crazy noisy and got a heck of a deal on the 1.7's so i went that route.

**Lawhead** · 12-22-2010, 09:29 PM

Mr. McLawdawg lmao but stumbled across this someone had showed me

http://www.kyfbodies.org/vb/showthread.php?t=9143

dyno numbers saying going from 1.6rr to 1.7rr gave him 15 HP so going from 1.5 non roller to 1.7 should be nice upgrade

**96lt1m6** · 12-22-2010, 09:44 PM

I would not have an issue going to 1.7s mainly since you
stated spring change........ Hp increase should be an additional 5-7 hp out back.
Valve cover mods should not be needed going from the 1.6 to 1.7

**Snkebait95** · 12-22-2010, 10:03 PM

I heard the 1.7s change the geometry a little so Ive heard of people changing pushrods too...

**Lawhead** · 12-22-2010, 10:06 PM

Well gonna have to change to a hardened push rod anyways so I'll get them measured so everything is good.

**SexyTransAm** · 12-22-2010, 10:13 PM

go for it and let us know how it works. and it would be really nice to have before and after dyno numbers! if the gains r that much i might look at goin from 1.6 to 1.7s