Autocraft Case 96.5mm -> 101.6mm
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Autocraft Case 96.5mm -> 101.6mm
Hello,
I did ask this from autocraft already and they said this is doable, I was just wondering is there anyone in this forum who has done this conversion and what was the cost of machining etc. or would be it wiser to try to locate a 101.6mm case in the first place?
I would get an extra 260cc's from with the stroke I'm currently using (2399cc's to 2660cc's) with this change and as I haven't bought my cylinders / pistons yet I would like to study this opportunity as well.
I did ask this from autocraft already and they said this is doable, I was just wondering is there anyone in this forum who has done this conversion and what was the cost of machining etc. or would be it wiser to try to locate a 101.6mm case in the first place?
I would get an extra 260cc's from with the stroke I'm currently using (2399cc's to 2660cc's) with this change and as I haven't bought my cylinders / pistons yet I would like to study this opportunity as well.
- Marty
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- Matt Davis
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- Marty
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Its a "spare". My new car has the two piece ARPM in it and it works just fine (with some "massaging").Matt Davis wrote:How come you aren't running it? Is it the 2pc or the 3pc that had problems?Marty wrote:I have a brand new ARPM three piece case with the wide stud pattern forsale if you are interested. 3 liters would be no problem.
They both have oil return "issues" inside the case. You need to massage around the lifter bores (cause they are so HUGE) so that oil drains back to the sump faster. They also need the windows opened a bit so they "breathe" better.
- Muffler Mike
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- Marty
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THAT is the million dollar kicker. Wide stud pattern heads are hard to find nowadays. Especially nice or new ones.Muffler Mike wrote:just another thought that i havent seen you bring up yet. HEADS. if you have existing, will they take the wider pattern with out having to completly modify the piss out of them?
Any thing is possible given enough work.
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we are in the process of making our comp. elim head with a 4" bore. We are doing it the right way, moving the intake seat and port over .050 so bigger valves can be used. We are also going to add some material to the outside of the intake port so there is room to port the head when bigger valves are used. Things should happen in the next few months.
- Muffler Mike
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cool to see more options out there.Pat Downs wrote:we are in the process of making our comp. elim head with a 4" bore. We are doing it the right way, moving the intake seat and port over .050 so bigger valves can be used. We are also going to add some material to the outside of the intake port so there is room to port the head when bigger valves are used. Things should happen in the next few months.
maybe even offer it in black head stud version as well so the end user can do with what they want. such as maybe using a porshe cylinder for example.
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Haven't bought the heads yet. Just looking at different options at this point what to do with the bore. It would be rather simple decision to go with what I have if I'd have 96.5mm heads as well But good point nonetheless.Muffler Mike wrote:just another thought that i havent seen you bring up yet. HEADS. if you have existing, will they take the wider pattern with out having to completly modify the piss out of them?
Any thing is possible given enough work.
Doesn't Autocraft offer 101.6mm heads off the shelf or are they on back order?
- Wally
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Cool!Pat Downs wrote:we are in the process of making our comp. elim head with a 4" bore. We are doing it the right way, moving the intake seat and port over .050 so bigger valves can be used. We are also going to add some material to the outside of the intake port so there is room to port the head when bigger valves are used. Things should happen in the next few months.
Pat,
Would this mean that you could use a wbx case as well? They have the 'wider'stud pattern as stock, but I'am not sure if its exactly the same. Maybe you know?
Thanks,
Walter
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- Jerry D
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Pat,Pat Downs wrote:we are in the process of making our comp. elim head with a 4" bore. We are doing it the right way, moving the intake seat and port over .050 so bigger valves can be used. We are also going to add some material to the outside of the intake port so there is room to port the head when bigger valves are used. Things should happen in the next few months.
Talk about a timely posting, I recently bought a Scat "Killer" case, cut to run 101.6's and my deal on the heads fell thru.
Do you have any specifics as far as available valve sizes?
Thanks for the insight,
Jerry...
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