Unforgiven Project

Indycars said:
Don't forget about Por15, it's held up in my engine for 6 years now.
Click to expand...
I'm not sure POR15 would be a good choice here. POR means Paint Over Rust. It really needs that rough, rusty surface to work as intended.
I know you used it Rick, but if the surface is too smooth, it comes off. Remember what happened to your oil pan?
 
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I got the cam installed for the fit test... It spins very nice and easy with my fingers.
I do have question though..... I forgot if the cam is suppose to be flush with the core face?
It is placed in against the rear plug in the pic below.
I was thinking I may have installed the rear cam tunnel plug too deep.

CAM PIC 003.jpg


CAM PIC 001.jpg


I also got the .040 hole mod drilled into the front galley plug and installed.

CAM PIC 004.jpg

I finished off the night by getting bolting down the ring filer onto a metal stool, ( I did this so that I could have mobility of where
I wanted to set up an area to do the filing ) . I forgot to get a pic of it, but I will get one next time.
The new filer is taking some getting use to, I managed to get 2 lower rings fitted. There was about .022 to file off in order to achieve
a .026 gap. That last couple thousands is very trying. But I did it! It only took 1 1/2 hours to fit 2 rings! :rolleyes::)
But I will get better as I get used to the filer. I used a 320 stone to carefully knock of the burr. I'll get some pics
for this also.

Mike... I found where the blind plug installs.. the plugs I have where intended to be used for the oil gallies in the front of the block.
I tried to install one under the rear oil cap and found that the hole is around 7/16" and those plugs for the main oil gallies are 1/2"
I will stop by the store tonight and purchase the correct plug.
 
The block is setup for the factory Roller Thrust plate.
It started in 1987 with the C4 L98 Corvette engine. 1 st year of the factory hydraulic roller camshaft.
 
I have 2 NOS GM camshaft Thrust plates in packages still if you need one.
Just pay for shipping.
Send it off to you.
 
According to this site I have a "08" prefix block... It states that I can use the older style cam but I will need to purchase a special
timing chain set..
I am not sure on what I am looking for in another new chain set.
Any help here would be appreciated.
 
Well I have all sorts of bad images going through my head now! I have to wonder how much of the cam is actually sitting in the front bearing.
Also I need to check and see how the cam lobes line up with the lifter bores.
I will have to look for the recommended clearance between the rear of cam and rear cam plug.
 
Unforgiven said:
According to this site I have a "08" prefix block... It states that I can use the older style cam but I will need to purchase a special
timing chain set..
I am not sure on what I am looking for in another new chain set.
Any help here would be appreciated.
Click to expand...
The Summit Racing search engine is only so accurate on stuff problems like this.
I have a Cloyes Racing timing chain catalog paperback....like always when you need it instant to look at , I don't recall where it's at in my house.
It's online also....PDF Download.
 
stepnoser1.jpg


Starting in 1987 GM began using a hydraulic roller cam in their production car engines.
This required a cam thrust plate on the front of the block.
The step in the nose of this cam (left) identifies it as a cam intended for use in a production roller cam block.

If your ever in doubt, about the correct timing chain application,
CALL THE TECH GUYS AT CLOYES:D
cloyes tech dept 1-479-646-1662 EXT 228
with the older style non-step nose cam, in the newer style "08" block, you will NOT use the retainer plate
you should use a cloyes 9-3100 timing chain, set

https://www.summitracing.com/parts/clo-9-3100

http://garage.grumpysperformance.com/index.php?threads/semi-fool-proof-cam-sellection.82/

http://garage.grumpysperformance.co...hanics-of-adv-ret-a-camshaft.4532/#post-12050

http://garage.grumpysperformance.com/index.php?threads/cam-drive-details.3809/#post-10226

http://garage.grumpysperformance.com/index.php?threads/wear-plate.3777/#post-10011
 
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Loves302Chevy said:
I'm not sure POR15 would be a good choice here. POR means Paint Over Rust. It really needs that rough, rusty surface to work as intended.
I know you used it Rick, but if the surface is too smooth, it comes off. Remember what happened to your oil pan?
Click to expand...
POR does not hold true for applying the paint. Per their instructions I used their rust converter (Metal Prep) like the instruction say before painting. The oil pan had a gold zinc plating that had to be removed for the paint to stick.

https://www.por15.com/POR-15-Engine-Enamel (Click on the "Instructions" tab.

Bare Steel: Remove grease, oil, and other foreign substances with water based POR-15 Cleaner Degreaser then rinse with water. If surface was previously painted, sand with 320 grit sandpaper or a POR-15 Scuff Pad then apply POR-15 Engine Enamel. If surface is bare or rusted metal you must use POR-15 Metal Prep to prepare surface before painting. Spray or brush POR-15 Metal Prep onto surface and keep wet for 10-20 minutes then rinse thoroughly with water. For best results, next apply one coat of POR-15 Rust Preventive Coating. When POR-15 Rust Preventive Coating is dry to the touch with slight finger drag (approximately 2 to 6 hours) apply POR-15 Engine Enamel directly over POR-15 Rust Preventive Coating.
 
Grumpy said:
stepnoser1.jpg


Starting in 1988, GM began using a hydraulic roller cam in their production car engines.
This required a cam thrust plate on the front of the block.
The step in the nose of this cam (left) identifies it as a cam intended for use in a production roller cam block.

cloyes tech dept 1-479-646-1662 EXT 228
with the older style non-step nose cam, in the newer style "08" block, you will NOT use the retainer plate
you should use a cloyes 9-3100 timing chain, set

https://www.summitracing.com/parts/clo-9-3100
Click to expand...
1987 is the 1st year of the step nose Hydraulic cam 350 L98 Tpi.
I had the intake off of my 87 Vette.
Seen Factory roller lifters with spider hold down tray in lifter valley.
 
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1987- 1991 C4 TPI 350 L98 Hardware factory Hyd. roller stepnose cam compatible.
 
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Loves302Chevy said:
I'm not sure POR15 would be a good choice here. POR means Paint Over Rust. It really needs that rough, rusty surface to work as intended.
I know you used it Rick, but if the surface is too smooth, it comes off. Remember what happened to your oil pan?
Click to expand...
I used POR-15 when it 1st came out in 1996.
No one used it local but I gave it a try.
The entire underside of my TA I redid restored and used POR-15 gloss black.
Topcoated with PPG DP-90 Lead based epoxy primer.
Then a finish coat with PPG DAU9300 Gloss black Urethane Epoxy.
Has held up great.

Not sure about use on a race engine.
They get super hot in battle WOT.
 
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