V6 valve cover spacers have arrived! (Page 1/4)
lou_dias JUL 10, 12:58 PM


This is basically for people who want to run aluminum full roller rockers from Summit 1.6 ratio. This will let you use the Firebird 2.8 valve cover gasket under the Fiero valve cover gasket. It's 1/8" thick. Made out of aluminum.
I should have them installed [hopefully] within the next 2 weeks. I'll tweak the design based on any issues I encounter. They are CNC cut designed by me.

These are the rockers I'm talking about. Summit used to make their own brand which were more inexpensive:
https://www.summitracing.co...cc-scp1036/overview/


EDIT:

Here are the spacers installed:

[This message has been edited by lou_dias (edited 08-02-2019).]

SCCA FIERO JUL 10, 01:25 PM
Let me know when ready.
Dennis LaGrua JUL 11, 10:22 AM
Good solution for raising the valve covers for high lift rockers, but when you raise the lift you may also need to scrap the stock intake manifold setup..

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

[This message has been edited by Dennis LaGrua (edited 07-11-2019).]

lou_dias JUL 11, 02:38 PM

quote
Originally posted by Dennis LaGrua:
Good solution for raising the valve covers for high lift rockers, but when you raise them you may also need to scrap the stock intake manifold setup..


No, not at all. The valve covers go off at a 60 degree angle and don't hit the middle manifold.
Doug85GT JUL 11, 04:45 PM

quote
Originally posted by lou_dias:

No, not at all. The valve covers go off at a 60 degree angle and don't hit the middle manifold.



I think he means that the stock intake manifold is too restrictive. That could cap your performance gains.
Dennis LaGrua JUL 11, 06:31 PM

quote
Originally posted by Doug85GT:


I think he means that the stock intake manifold is too restrictive. That could cap your performance gains.



Post corrected. Thanks

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

pmbrunelle JUL 11, 08:26 PM
Even if your high-RPM breathing is choked by the factory intake, full roller rockers may prevent high-RPM durability issues with stock rockers, such as scuffing of the ball and socket.

Also, the reduction in friction applies to all RPMs... so it may be a worthwhile mod regardless of how modified your 2.8 is.

Lou, how much space will there be between the valve cover and the rocker when the spacer and cork gasket is installed?
lou_dias JUL 12, 08:27 AM
I'll already running 2 gaskets with full roller rockers and there is still clearance. This is only an additional 1/8" so I already know they will clear. These spacers are insurance for even higher-lift cams and also because the stacked gaskets with no spacer leads to oil leaks.

I will hopefully have them installed before my next race on the 20th. I need my exhaust repaired and a couple of other things so I also dropped of the spacers for installation.

As for performance gains, you can cross-drill some holes at the bottom of the middle intake to increase top-end performance as I have shown (admittedly I may have went overboard in my mod):
http://www.fiero.nl/forum/Forum2/HTML/142715.html

[This message has been edited by lou_dias (edited 07-12-2019).]

mcguiver3 JUL 12, 08:34 AM
where are you racing?
lou_dias JUL 12, 09:11 AM

quote
Originally posted by mcguiver3:

where are you racing?



Seekonk Speedway in Massachusetts