Hobbsie

Friend & I just tore down a 3.0L I recently bought from Paul @ PAR, New Rochelle, NY. What we found was five broken head studs on left side, none on right. Half the cam lobes & associated rockers have pitted surfaces.

I was thinking of upgrading the power & torque output (maybe 250 HP?) with cams and improved flow. I don't wish to change compression ratio. I wish I could score an intake box with 44mm tubes.

Any suggestions as to sources for cams, head studs and gasket sets without getting too carried away?

Steve Weiner-Rennsport Systems

Hi,

JHMO,.....

1) The cams can be repaired as long as the bearing surfaces are not pitted. They can also be reground with a different profile at the same time.

2) Replace ALL the studs with either 993TT Dilavars or steel ones. I think those late Dilavars are a mauch better solution.

3) New rocker arms are required.

4) You'll not see anything close to 250 HP with a 3.0 or 3.2 CIS engine but you can make some nice gains with exhaust and cam changes.

I can provide anything you need.

JV911

steve,

whats the cost difference: new 964 cams v regrinding ?

Steve Weiner-Rennsport Systems

Factory new 964 cams run $ 1300/pr and the PS drive must be machined off to work in your cam towers.

New billet ones run $ 995/pr and having your current ones re-ground runs $ 695/pr.

JV911

thanks

sounds like new billets are in my future

Hobbsie

JV911, you gotta change your avatar! I appreciate a fine hind shot as much as any red-blooded male, but I don't really like it stuffed in my face every time I view your post.

-Steve H

Houpty GT

I got a price of $350 for a cam regrind to stock from Elgin Cams. I thought that was the price for both but I could be wrong. I found a used set for myself for $100 but I may just be lucky. Try your local PCA members. To get to your 250 horses you can buy new new pistons and cylinders and go up to 3.6 liters and still keep the CIS injection. If you want to go to a hot cam profile you are going to need to go to caburetors which will also add to your pony power. In the book "The Gold Plated Porsche" this is about what he did and he got something like $260 at the wheels. I do not recall exactly.

I made a spread sheet of prices for the parts I bought for my tranny and top-end engine repairs. I can email you the file if you want. It would be much easier to read. Vertex was generally the cheapest about 70 percent of the time. I went with plain steel studs. I have not heard of anyone with the aluminum block having a problem with this. Dilavar would have been fantastic on the magnesium cases but was not necessary for the aluminum cases.

Part Pelican Performance Vertex Adirondack
Transmission 888-280-7799 888-787-3626 866-668-0660 8774437626
Roller bearing 99911003200 32.75 73.95 155 32.72
collar nut 99903403300 10.5 11.95 8 7.87
3/4 operating sleeve 91130241120 185.5 189 178.07
3 dog teeth 165 152.95 179 163.54
3 synchro same as 4 91130230106 83 76.95 74 80.94
4 synchro same as 3 83 76.95 74 80.94
o-ring
mainshaft seal 13.25
shifter seal 8
gasket gear housing to case 91130241120 1 1.63
gasket front cover to gear housing 915-301-351-00 1.25 1.39
gasket cover plate for shift fork 915-303-225-00 1.25 2.29
swepco 49.25 47.95 49
1/2 operating sleeve 212 189 198.2
1 dog teeth 195.5 135.95 155 196.69
2 dog teeth 195.5 146.95 179
1 synchro 89.5 81.95 75 87.32
2 synchro 89.5 81.95 75 84.8
Tools
dog teeth press 1 and 2 96.3 99.95 109
dog teeth press 3,4,5 88.2 89.95 109
ENGINE
Throttle linkage bushings 90142325300 3.25 4.95 3
Crankcase breather gasket 93010779102 4.25 5
underhood sound mat 91155689101 61.75 69.95 54
pressure plate bolt 90006709002 2 3.95 2 1.27
clutch disc alignment tool 8.85 9.95 9
clutch release crossshaft seal 2.25 1.72
cam woodruff key 1 0.57
gasket kit 93010090703 238 236.95 209 207.58
Chain ramp brown 91110522205 7.75 6.5 7.85
Chain ramp black 91110522206 7.75 6.5 10.87
Head studs 10.75 17.9 15.29
rocker conical nut 90110537602 5.75 4
piston rings 28.75 23.16666667 38.38
timing chain with master link 91110552950 46.75 46.95 45 47.75
carrera tensioner kit 635 659.95 579 755.76
rsr rocker arm seals 911.099.103.52 4.5 2.5
oil pressure switch 6.5 7.95 12
oil thermostat o-ring 99970731440 2 1.5
Adhesives
loctite 574 24 28.3 23
loctite 271 6.5 5.95
Curil-T 10.1 11.95

Houpty GT

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