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[Healeys] Selecting a replacement CAM for BJ8

Subject: [Healeys] Selecting a replacement CAM for BJ8
From: bspidell at comcast.net (Bob Spidell)
Date: Sat, 15 Apr 2017 08:37:56 -0700
References: <CAA-dtXag81KPCpeKbiy=ajU4DJ-2rO1_Mai=w0QkpG7ycenpMg@mail.gmail.com> <20170327041550.Q9GEP.11688.root@cdptpa-web12> <3E17D0DD06EE3063.83ced4e6-546f-4184-93e9-558992bd613c@mail.outlook.com> <1646379694.45194543.1492254766630.JavaMail.zimbra@comcast.net> <8858cdb7-8eec-c0a3-2d62-29a672d1d20e@comcast.net>
Neglected to mention I have a Lempert 3.54 diff in my car, so the lower 
torque curve is helpful.

On 4/15/2017 7:17 AM, Bob Spidell wrote:
>
> Hi Dave,
>
> I just finished a rebuild on my BJ8; my engine--with over 100K 
> miles--was in similar condition to yours with significant cam lobe and 
> lifter wear.  I installed a DWR1 cam; it's more appropriate if you're 
> really ' looking for stock or mild tune only.'   The DWR1 is 'slightly 
> better than stock', in DWR's word's, and should be most appropriate 
> for a street/touring car as the torque curve is lower.  I don't think 
> you'll gain much if anything with the DWR8 unless you at least use 
> headers and port your head--or buy one of DWR's alloy heads--and then 
> additional tuning is required.  Steve G.--on this list, I believe--is 
> doing a build with a DWR8 cam, but he has headers and the rest of his 
> engine is likely tuned for the higher torque/power band.  The DWR1 
> doesn't want to go much over 4,500RPM, but I do mostly long distance 
> touring so I'm usually running 2,500RPM, give-or-take.  I do a lot of 
> driving '100 miles from nowhere' so I generally go pretty easy on my 
> drivetrain.
>
> DWR recommends their High Capacity oil pump when using their 
> gun-drilled cam, unless you're going to spend time over 6,000RPM (in 
> which case you'll probably want their billet crankshaft, conrods, 
> pistons, etc.).  Since you had cam/lifter damage, be sure to clean all 
> components--e.g. rocker shaft--thoroughly to remove any debris.  My 
> builder was adamant about that.  You can use either 'standard' lifters 
> with your current pushrods, or get bucket lifters and their pushrods.  
> I went with standard.  I sourced an adjustable, vernier timing set 
> from Australia; my builder said the cam did require some adjustment.
>
> DWR Support has a chat facility; they are very responsive but, of 
> course, there's a significant time difference.  Whichever cam you use, 
> please let us know your results.
>
> Bob
>
> On 4/15/2017 4:12 AM, drmasucci at comcast.net wrote:
>> Hi All,
>>
>> Well now that spring is here, I am resuming the rebuild of my BJ8 
>> engine. The engine was rebuilt back in 1999, but since I'm doing a 
>> full resto of the car, I decided to take a look at the engine. While 
>> all other parameters were well within spec, the cam and lifters were 
>> damaged. Back then I didn't know much about modern oils and the lack 
>> of zinc, and since that's the only part of the engine that didn't do 
>> well, I am assuming that must be why.
>>
>> So I am now trying to decide what to do. I can have my cam reground, 
>> or buy new. Since I believe it was already reground and based on the 
>> wear, I am thinking maybe new is the best choice. I am looking for 
>> stock or mild tune only.
>>
>> I am not a pro engine builder, but I know the basics and am not new 
>> to the process. I know that if I change something like the cam 
>> parameters, I need to understand how that affects the rest of the 
>> valve train. I looking for guidance on selecting the right components.
>>
>> I am considering the Welch DWR8 cam and lifter package. I understand 
>> that I will have to machine pockets into the block for valve 
>> clearance. I will be having the head rebuilt to basic stock 
>> parameters as far as the valve gear is concerned. I need to determine 
>> how to select the correct pushrods. Since this cam is drilled to feed 
>> oil to the lobes, do I need to make other modifications to support 
>> that feature?
>>
>> So I'm looking for some feedback and recommendations from the list. 
>> Has anyone followed a similar path on their 6 cylinder Healey?  Any 
>> opinions, cautions, or advice would be appreciated. Is this cam my 
>> best choice? Also if there are better options to consider I'd like to 
>> hear that also.
>>
>> As usual, thanks in advance for any help.
>>
>> Dave
>> 64 BJ8
>> 72 XJ6
>> 72 Bonneville
>>
>>
>>
>>
>>
>>
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>
>
>
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