Heslekrants

The cam you have was designed to take advantage of the 1.6 rocker so you really need use 1.6 rockers unless your heads can't handle the lift.

Who ever told you "1.6s will be unnecessary" doesn't understand the cam you have.

You can call Comp Cams tech line for some good info.

89IrocZ350TPI

^^^ Agreed

navyCM

iTrader: (3)

i know the heads can handle it. i got info from an AFR tech rep and he actually said to use the 195s instead of the 180s for that cam.

i was planning on the 1.6 anyway just need to find a good set at a good price. trying to keep the built under $3k and it getting close.

so the for mentioned 1.6 rockers on ebay will work nicely?

Heslekrants

I think so, I'm very happy with the 2 sets of SS roller rockers that I've bought from them. Keep in mind that without alot of modifing these will not fit under stock valve covers.

navyCM

iTrader: (3)

how many miles have you run on the 2 sets youve purchased?

89IrocZ350TPI

http://store.summitracing.com/partde...5&autoview=sku

navyCM

iTrader: (3)

no i was refering to these: http://cgi.ebay.com/ebaymotors/SBC-C...Q5fAccessories

Heslekrants

Maybe 5K on the 383 & 10K on the 468 with the 468 seeing the north side of 7000rpms alot. The 383's tranny is setup to shift at 5800rpms at full throttle to match the peak of the cam.

The 468 is apart right now due to an internal gas leak on the Demon carb sending fuel into the oil and trashing the bearings. We inspected the rockers after 10k use and couldn't see/feel any wear. If these were alum rockers you would show some wear.

navyCM

iTrader: (3)

im going to probably be picking up a set of these. would you recommend them for a daily driver?

Heslekrants

Yes on these SS rockers. I wouldn't put alum rockers in a daily driver. I've been down that road many times.

Shadygrady

iTrader: (3)

I`d watch out for any off brand rockers.Stainless or not.The firs set of rockers I put on my engine were cat stainless steel 1.6rr I got from pace.About 5000 miles needle bearings started going in them one at a time.Chinese made crap.I now run a set of summit 1.6 7/16 full rr.I realize it is also an off brand and alluminum but I`ve seen several guys run them with no problems.Seen guys put 100,xxx miles and more on them in a DD.Mines not a DD modt of the time unless my truck is down but I`ve put about 15,000 on them with absolutly no issues.

navyCM

iTrader: (3)

whats up shady? long time no see. thanks for the info. i just want a good low price but quality rr for this build. always open to suggestions.

Shadygrady

iTrader: (3)

Hi Navy.I like my summit rockers.T realize they arent the best but the price was right and I`ve seen people use them with no issues.My expereince with the SS rockers may have been a fluke or just a poor choice in brand.I bought the summits cause my car was down due to the other rockers and they`ve been on there for about 2 years now.Thats a year and half longer than the SS I bought lasted.

89IrocZ350TPI

Hey guys. I will be installing the rockers next saturday, then Ill prob be having it dynoed. Hoping for 15 horses at the motor!

Shadygrady

iTrader: (3)

If you see 15hp at the motor I`m going to have to look into some 1.7 rr`s.Been considering it anyway.

navyCM

iTrader: (3)

which rockers did you get?

89IrocZ350TPI

proform. 15 my be a bit much but thats what its advertised as.

Heslekrants

Have you dynoed the motor the way it is already or are you going to dyno it a couple of times, swap rockers then dyno some more?

Going to the dyno tends to be a humbling experience.

skinny z

The drag strip too.
The 15 hp isn't too much of a stretch provided you can tune to take advantage of the increased breathing.
In a 3650lb car, the 1.6 upgrade netted 2/10's and 2 mph which translates roughly into 313 rwhp which is up from 297rwhp before the swap. Apparently the little Vortecs respond well to the extra lift which would have been .488" as opposed to .458".
Good luck.

Heslekrants

I installed 1.6 rockers on all 3 of my Vortec motors and have been very happy with the results. It's the biggest bang for the buck plus an easy install for these Vortec motors(v8).

tony_cogliandro

iTrader: (3)

hello commander - did you go ahead and buy those rockers?
is you dont mine, be sure to post how they looked and worked - im going to have to get a set of ss full roller rockers and im getting info.
are you going with 1.6? what springs are you using. i know im picking your brain, but i got a set of springs, push rods, spring retainers with a zz4 cam and im trying to see what i need to get to put them into a 601 head.
looks like i will need screw in studs too - anyone here buying new ones?
well thanks for any info.

skinny z

I see that you don't mention the push rod hole mod in your posts. I assume you haven't changed to a screw-in stud/guide plate arrangement.

Heslekrants

2 of my installs were self aligning 1.6 roller tip rockers so I didn't have any issues with the push rod holes on stock Vortec heads.

My other install was with an aftermarket set of Vortec alum heads that already had large pushrod holes, 7/16" screw in studs & guide plates so my non self aligning SS full roller rockers installed without any issues. I did install longer pushrods per the head manufacturer.

89IrocZ350TPI

Already had it dynoed

Heslekrants

How about posting the dyno sheet?

rojas1826

so i am in the process of swaping out the original lb9 305 heads for a new set of vortecs i got from jegs i also got the tpi intake manifold for vortec heads now i need to know what rockers i need? and what would be a good cam?

Heslekrants

Your cam choice depends on what you want to do with the car & its driveability then rear intake/fuel, gears/torque converter need to meet the cam requirements.

Stock Vortec heads can't handle more than .480 lift without mods.

Stock Vortec heads use self aligning rockers. Type of rocker depends on how hard you plan on driving it. Not all rockers fit inside factory covers.

If you call Comp Cams they will walk you thru picking the right cam. It's easy to over cam to sound cool but run like crap.

navyCM

iTrader: (3)

so what would be a good cam/head set up w/ these 1.6 rr for a daily driver? i think the set up i intended to go w/ is not going to be good for a daily driver. i want to keep good fuel economy.

Calderone

People still buys proform ?
http://www.youtube.com/watch?v=DxROQtv7o2A

89IrocZ350TPI

Anything can break. Thats the only case ive seen of that ever happening. Maybe it was damaged during shiping?