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V-8 Engine Tech

Rebuild gets underway at last.....

Mopar Big Block Talk

by bkbridges » Tue Apr 09, 2019 8:02 pm

Eric,
The Edelbrock heads use a specific gasket from Fepro (7325?) and I do not modify them. Some people may enlarge the slots to help coolant flow in the heads, but I have never encountered a problem with over heating. The 7325 is an MLS gasket and if you do modify it you may compromise the gasket by exposing the multi layered construction to coolant . While this topic has been beaten over the head in the Jensen world, I dont know of any serious Mopar engine builder in the states that modifies the gaskets. I have seen slotted gaskets (shim steel) that have been eroded away at the slots due to bad coolant/maintenance.
My .02 on this topic :roll:
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by Jorrocks » Tue Apr 09, 2019 10:10 pm

Thanks Bruce, that very much puts my mind at rest!
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by Jorrocks » Sun May 19, 2019 2:47 pm

Nearly there now. The water pump housing and inlet manifold are back on, having been powder coated. The Jensen valve covers needed machining to fit with the Hughes rockers, but are now fitted too, so it will be on the dyno just after the May holiday. I will try to post a link to a video or two!
Last edited by Jorrocks on Sun Jun 16, 2019 1:12 pm, edited 1 time in total.
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by Roh » Tue Jun 11, 2019 5:03 am

Any updates?
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by Grant » Tue Jun 11, 2019 6:48 am

Yes come on Eric... What happened to the Dyno Run?Image
We are all sitting here with popcorn waiting to watch it!!Image
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by Joerg » Tue Jun 11, 2019 11:56 am

I have a hydraulic roller cam in my CV8.
After 5-6.000 miles, the bronce gear that drives the distributor and the oil pump was totally worn out.
I needed a billet alloy timing gear cover like this: https://www.manciniracing.com/mabbialtico.html to adjust the cam endplay.

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by Roh » Tue Jun 11, 2019 2:59 pm

Joerg wrote:I have a hydraulic roller cam in my CV8.
After 5-6.000 miles, the bronce gear that drives the distributor and the oil pump was totally worn out.
I needed a billet alloy timing gear cover like this: https://www.manciniracing.com/mabbialtico.html to adjust the cam endplay.

Joerg


Handy information. Thanks!

These may be the go. http://www.cranecams.com.au/pdfs/OCT11- ... stgear.pdf
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by Jorrocks » Sat Jun 15, 2019 2:05 pm

Joerg wrote:I have a hydraulic roller cam in my CV8.
After 5-6.000 miles, the bronce gear that drives the distributor and the oil pump was totally worn out.
I needed a billet alloy timing gear cover like this: https://www.manciniracing.com/mabbialtico.html to adjust the cam endplay.

Joerg


Hi Joerg,
Did that wear occur even using a cam button to control end float? I am using this: http://www.manciniracing.com/mararocambua.html with a standard type Milodon pressed steel cover.

Grant,

We were sent the wrong pushrods, getting the correct replacements has caused a delay to ‘Dyno day’!
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by Jorrocks » Wed Jul 24, 2019 12:35 pm

It ran! But not for long! We have hit another snag, namely a dud Crane Cams hydraulic lifter on cylinder four so that has stopped play for now.
I am trying to upload a short vid’ to YouTube but meanwhile here are a couple of stills:

2F43938C-EA7A-4C4D-8E11-29EC19B2FF0C.jpeg
2F43938C-EA7A-4C4D-8E11-29EC19B2FF0C.jpeg (169.32 KiB) Viewed 433 times


83187170-C82F-4F8F-B88E-F1D262C0E335.jpeg
83187170-C82F-4F8F-B88E-F1D262C0E335.jpeg (150.27 KiB) Viewed 433 times
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by Grant » Thu Jul 25, 2019 6:34 am

Image... Oh Dear Eric.. that is not good!!Image
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by Jorrocks » Thu Jul 25, 2019 2:04 pm

Hi Grant,
No drama really, just a hassle having to buy another pair from the US! Quite obviously a manufacturing or quality control issue but no doubt Crane will say it’s not their problem! Anyway, on the plus side the engine sounded fantastic and nothing leaked out or fell off!
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by Jorrocks » Mon Jul 29, 2019 10:31 pm

New pair of lifters on the way, meanwhile here's a quick vid' of the first start before we had to stop again! Those gash headers have already started to take on a rather nice 'Jersey cream' colour. Proper film to follow when new lifter installed.......

https://www.youtube.com/watch?v=vLF-yVZ0Uww

and a bit of messing around with iMovie, my first attempt, and it shows:

https://www.youtube.com/watch?v=QJYKSRimWhI
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by FFPL » Mon Jul 29, 2019 11:15 pm

Jorrocks wrote:New pair of lifters on the way, meanwhile here's a quick vid' of the first start before we had to stop again! Those gash headers have already started to take on a rather nice 'Jersey cream' colour. Proper film to follow when new lifter installed.......

https://www.youtube.com/watch?v=vLF-yVZ0Uww

and a bit of messing around with iMovie, my first attempt, and it shows:

https://www.youtube.com/watch?v=QJYKSRimWhI

is your oil pressure really 96 psi @2000 rpm ?
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by Grant » Tue Jul 30, 2019 9:42 am

Eric.. It isn't making any power or torque at 2100 rpmImage
Look for example at this 440 at 2500rpm >>>
>>>
Mopar 440 Jensen.jpg
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I'm no engine Guru Eric, is it built for just all power and torque at high RPM? :?
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by Roh » Tue Jul 30, 2019 10:03 am

The motor is just running in. They haven't been doing full power runs.
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