1.6 rockers vs 1.52 rockers - pros and cons (Page 2/6)
Arns85GT JAN 29, 11:01 PM

quote
Originally posted by Patrick:

Arn, the roller tips would help ensure that there wouldn't be any excessive wear on the end of the valve stems or on the tips of the rockers themselves, but how do the roller tips help minimize wear on the cam lobes and/or lifters? There's still going to be added force on those areas due to the extra leverage of the 1.6 rockers.



The change is so small, the engine won't even notice it. Sure in theory it is more pressure but a taller cam lob also increases pressure. It just doesn't make any practical difference.
Patrick JAN 30, 12:40 AM
Okay, I'm starting to feel a little less leery myself about possibly installing a set of 1.6 rockers. I wouldn't mind just a bit more power for my Formula at autocross.

These are the ones, right? CompCams 1414-12

[This message has been edited by Patrick (edited 01-30-2015).]

Arns85GT JAN 30, 08:48 AM
I'm pretty sure that was what I used
RayOtton JAN 30, 09:23 AM
Checked the website.

There's no mention of the Fiero in the applications list since it starts around 1991. I don't suppose that's much of an issue though.

Also, there's a kit that includes new pushrods for only $7.00 more.
sardonyx247 JAN 30, 10:54 AM
I have been running the Comp Cams 1.6 Roller Tipped, for the last ten years.
Only use the Comp Cams, the Crane ones look horible in comparison.
The Camaro (3.4) Guys claim 15 hp off of it.




edit to add: I run Mobil 1 oil.

------------------
"DRIVE IT LIKE A FIERO"
'84 Fiero, engine to be determined '87 Duke (Sold)
'87 Quad 4 H.O.
'87Blue GT 3.4L Swap Completed!!!!!!!! Boosted!!!!!!!
^^^^ Now in the Construction Zone^^^^
Las Vegas Fiero Club Parts/Sales/Service/Club
Fiero Road Club Of Northern Nevada

[This message has been edited by sardonyx247 (edited 01-30-2015).]

Arns85GT JAN 30, 11:19 AM

quote
Originally posted by RayOtton:

Checked the website.

There's no mention of the Fiero in the applications list since it starts around 1991. I don't suppose that's much of an issue though.

Also, there's a kit that includes new pushrods for only $7.00 more.



The key to the listing is "fits Applications 1980-1994 Chevrolet" The Fiero v6 is a Chevrolet engine.
lou_dias JAN 30, 11:36 AM
Here's the ones I used (1.6)

http://www.summitracing.com/parts/sum-g6936-16
I also had to use the 10mm->3/8" stud adapters...

[This message has been edited by lou_dias (edited 01-30-2015).]

Patrick JAN 30, 12:33 PM

quote
Originally posted by lou_dias:

Here's the ones I used (1.6)

Summit Racing® Aluminum Roller Rocker Arms SUM-G6936-16

I also had to use the 10mm->3/8" stud adapters...





These are normally used for the SBC, right?

I'm intrigued with the use of this style/application for the 2.8/3.4 as there are a lot of choices available for the SBC (and therefore potential good deals on eBay).

You had to swap out the studs from 10mm to 3/8"... anything else, like push rods and guide plates?

[This message has been edited by Patrick (edited 01-30-2015).]

E.Furgal JAN 30, 01:26 PM
For those worry'n about cam/lifter wear that then think roller tipped rockers,, are ok,,
the rockers have the same issue as the cam/lifter.. in the ball socket, both blue then crack/fail. either run full rollers or don't waste your money.
lou_dias JAN 30, 03:28 PM
I think the ones I quoted were normally used on 3800 motors... The difference is the stud: 10mm vs 3/8" ... Someone suggested to me that since 10mm is close to 3/8" that you may not even need the adapters and can stick with the 10mm nut since it's just there to hold the fixed base of the rocker down on the head - which I believe - but that was after-the-fact/installation.

As for worrying about wear - that's another reason I use roller-cam blocks exclusively now...

[This message has been edited by lou_dias (edited 01-30-2015).]