OC305RS

HAS ANYONE DONE THERE TOP END WITH THE NEW JIM PACE VORTECH KIT: HEADS, INTAKE, ECT....WHAT CAM WORKS THE BEST WITH THIS KIT? WOULD I BENEFIT MORE FROM USING THE WORLD PRODUCTS S/R TOURQUER HEADS?? ANY INFO WOULD BE HELPFUL....I'M CHRISTMAS SHOPPING!
SEND RESPONSES TO: mike@autoaccessory.com
thanks!

Ray87Z

Do you have a 305 like your name implies or a 350?? If it's a 305, the 305 S/R torquers or Aluminum L98 heads will be your easiest bet since they both have 58cc chambers to retain compression. However, the Vortecs are so cheap you could afford to have them milled a bit to remedy that and still come in under the other two choices initial price (new anyway). The Vortecs will outperform either on a 350 where you don't have to worry about the 305's bore shrouding the valves. Not sure how that will come into play with each head on the 305...

If you're talking about a 350 to start with, The Vortec's will easily beat out the 350 S/R Torquers as well. Check out http://www.inter-scape.com/ray/heads...eadstest_4.jpg , it has both flowed. Not to mention the Vortec has a better combustion chamber design.

I don't know about Jim Pace's kit, but many people have had good luck with the Vortecs, a CompCams extreme energy grind, and a Performer or Performer RPM Vortec carb intake. I'm assuming you have TBI on your RS so you'll need to take into account a TBI adapter or a TBI specific Vortec intake (I think Scoggin Dickey sells one).

Also, the only real limitation of the Vortecs in stock form for your average street performance car is the max lift they can handle. .480" lift is the absolute max you'd want to run, and that is over the recommended numbers from GM (multiple people are running that with no problems I'm aware of, but it's pushing it...). I'm running the CompCam's XE262 with .462/.469 lift on them and it does work fine with no problems. That's a 350 btw, that cam is probably a little on the big side for a 305 with an auto... The vortecs will handle any of the mild 305-aimed cams just fine as most are under .460 lift...

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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

Jer82Z28

hey ray, you are running 1.6 rr's on your vortec engine right? are you still using the stock springs??

Ray87Z

No, just 1.5s with the XE 262 (.462/.469 lift with 1.5s) and stock springs.

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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

killer305

iTrader: (1)

ive been told vortec heads are one of the best cast iron heads avaliable, and the price jujst isnt beatable

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90 RS 305 tbi, 4 3/4" cowl Hood, Edelbrock TES headers, Flowmaster exhaust, Crane roller cam, comp roller rockers, vortec heads/intake, ported tbi, w/new injectors, MSD probillet Distributer/ coil, 1 inch tbi spacer, air foil, 14x4 k&n flat base air cleaner, Rebuilt 700r4 w/ B&M shift kit, B&M Megashifter, 3.23 posi, 2 12 RF's with mtx amp, top of line alpine cd player, soon to have 90-91 gfx, z-28 wing, new paintjob, rims, and all new lowered suspension.

8Mike9

The issues with running Vortecs in Ca. is the lack of EGR passage to the intake. You can still rig up an EGR system to work and pass a functional test, but it will not be CARB approved, in which case you'd need a very lenient smog inspector, or you'll be changing heads every two years. Same goes for the Corvette L98 Al heads too.