I added a set of Comp Cams 1.6 roller rockers, they are basically 1.6 ratio
SB Chevy roller rockers with the correct pushrods and rocker arm studs to
install them on a Magnum v6 or v8, expect a 12-15 hp increase at the crank
or a 9-12 RWHP increase on average, they work fine even with a stock
cam...........a valve spring swap is a good idea if your adding these and a
cam.
Ron-
'01 Dakota Sport 3.9 Supercharged
website:http://www.scsilverdak.com
e-mail: scsilverdak@hotmail.com
---- Original Message -----
From: <jon@dakota-truck.net>
To: <dakota-truck-moderator@bent.twistedbits.net>
Sent: Thursday, November 07, 2002 10:21 AM
Subject: Re: DML: Re: RE: Re: winter projects...
>
> "Gary Hedlin" <ghedlin@theramp.net> wrote:
>
> : The comp cams 1.6 ratio cams (part no 1424-KIT) will work perfect. They
> : also are significantly cheaper than the crowers. The 1.7's really don't
> : give you that much HP compared to the 1.6's. If your doing the rocker
arms,
> : I'ld recomend a camshaft too. a Comp Cams 504/.512 Lift, 200/206
Duration
> : (part no 3310) should work nicely, thats what I'm using for my new V6.
>
>
> I was going to suggest to Tim that as long as he was changing out the
> rockers, he might as well step up to the 1.7s for that extra lift, but
> I'd have to qualify that by saying that I'm not really up on what is
available.
> It sounds like the 1.7s might be significantly more expensive than the
1.6s,
> and if that's the case then the small additional increase might not be
> worth the extra cash outlay. If they were the same price though, I'd go
> with the 1.7s as long as you know there aren't any piston to valve
clearance
> problems. I seem to remember that if you upgrade to the rollers, you
should
> get higher valve covers too, or cut the baffles out of the stock ones.
>
> Speaking of rockers in general, does anyone have any before/after
> dyno data? The stock ratio on our Daks is already 1.6, so the only
> thing going to 1.6 rollers will give you is decreased friction and
> probably closer production tolerances than the stock stamped steel
> units. (Though it does give you the ability to rev a bit higher if
> that is what you're into.) :-) So, it doesn't *seem* like there are
> huge gains to be had here - I wouldn't expect any miracles and before
> doing this swap, I would definitely like to see some dyno data
> considering you're probably looking at dropping a few bills on it. :-)
>
> When I did a "performance rebuild" on my 440 Barracuda, I went with
> aluminum roller rockers, but mainly because I needed an adjustable
> valvetrain - if I didn't, I probably would have stuck with the stockers.
>
>
> --
>
> -Jon-
>
> .---- Jon Steiger ------ jon@dakota-truck.net or
jon@jonsteiger.com -----.
> | I'm the: AOPA, DoD, EAA, NMA, NRA, SPA, USUA. Rec & UL Pilot - SEL
|
> | '70 Barracuda, '92 Ram 4x4, '96 Dakota, '96 Intruder 1400, '96 FireFly
|
> `-----------------------------------------
http://www.jonsteiger.com ----'
>
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