The $400 400E

[gsxr]

Data in bold are measurements I took personally, and I'm confident the numbers are accurate within ±0.05mm. Other data is unconfirmed. Base circles are always between 37.00-37.10mm. I never had .960 cams to measure. Based on what you stated above, I'm wondering if Jono sent me data from other cams (not .960 cams). He had told me 15 years ago that he measured the .960 cams, and they were identical to E420 cams he also measured, which seems weird.

If you can double-check / verify any of the data below, that would be great.

M119.971/.975:​

4.2L 1992 intake = ?​

4.2L 1992 exhaust = ?​

4.2L 1993+ intake = 8.45mm​

4.2L 1993+ exhaust = 7.40mm​

​

M119.960​

5.0L 1992 intake = 8.60mm (data from Jono)​

5.0L 1992 exhaust = 7.60mm (data from Jono)​

​

M119.970/.972/.974:​

5.0L 1992 intake = 9.50mm​

5.0L 1992 exhaust = 8.75mm​

5.0L 1993+ intake = 8.90mm​

5.0L 1993+ exhaust = 8.40mm​

​

5.0L E50 AMG intake = 10.40mm (data from @Taxi Driver)​

5.0L E50 AMG exhaust = 9.40mm (data from @Taxi Driver)​

6.0L E60 AMG intake = 10.10mm (data from @Rouven036 in this post, LH engine, cam code numbers possibly #18-#21)​

6.0L E60 AMG exhaust = 9.80mm (data from @Rouven036 in this post, LH engine, cam code numbers possibly #18-#21)​

6.0L E60 AMG intake = 10.2mm (Benzworld post, LH cams)​

6.0L E60 AMG exhaust = 9.70mm (Benzworld post, LH cams)​

​

M119.98x AMG 6.0L:​

6.0L E60 AMG intake = 10.15mm (data from Jono, I think these were camshaft codes #26-#31 for ME)​

6.0L E60 AMG exhaust = 9.40mm (data from Jono, I think these were camshaft codes #26-#31 for ME)​

6.0L E60 AMG intake = 10.1mm (Benzworld post, ME cams)​

6.0L E60 AMG exhaust = 9.60mm (Benzworld post, ME cams)​

The AMG 6.0L camshafts are different between LH (#18-21) and ME (#26-31). The code numbers are stamped on the flange of the cams. I suspect the lift is slightly different between the LH and ME cams. No idea about duration.

Note there is quite a spread on the measurements of 6.0L exhaust cams (9.4 to 9.8mm). It's surprisingly difficult to get precise measurements (better than 0.05mm accuracy), which is why I think the numbers vary so much from different people measuring. I took a LOT of repeated measurements to get my 4.2/5.0 data in bold above. I also had to measure multiple different lobes, as there was some variation between lobes.

 

[gsxr]

BTW, note the AMG porting job shown in post #293 here.

 

[Beater400E]

M119.9605.0L 1992 intake = 8.60mm (data from Jono)5.0L 1992 exhaust = 7.60mm (data from Jono)M119.970/.972/.974:5.0L 1992 intake = 9.50mm5.0L 1992 exhaust = 8.75mm5.0L 1993+ intake = 8.90mm5.0L 1993+ exhaust = 8.40mm

I'm surprised to see such a difference in some of our numbers. Especially the 960 numbers. I may have to set up a more precise measuring jig to validate some of what I got. When I measured yesterday I just used a dial caliper on cams that were installed in engines, but it was tough to get good numbers. Maybe I'll yank a few out and bench test them with an actual dial indicator.

 

[gsxr]

I think the .960 numbers I got were in error. I suspect your data is correct, that the .960 and early .97x are nearly identical except for the 5° difference in cam advance (noted in the FSM documents).

I use a caliper on multiple lobes, and rotate the cams as needed to get the calipers on the cams evenly. And I repeat measurements until the results start matching. I'm pretty confident my data is close to reality.

Bummer the E50 cams are NLA (but, they were $4k/set when available, ouch).

 

[Beater400E]

Bummer the E50 cams are NLA (but, they were $4k/set when available, ouch).

Yeah, those would definitely make more power. I have been thinking of having a set of cams reground. I don't see why that couldn't be done by a regular cam grinding specialist in the states. I bet that could be done for $1000 or less.

 

[gsxr]

Yeah, those would definitely make more power. I have been thinking of having a set of cams reground. I don't see why that couldn't be done by a regular cam grinding specialist in the states. I bet that could be done for $1000 or less.

Search the forum for past discussions on Hagmann and Dbilas regrinds. The base circle is reduced which could cause issues. Main concerns are:

1) Verify max lift with stock valve springs (may be different with single springs vs dual springs)

2) A spacer "button" might be required under each lifter due to the reduced base circle

Pre-tariff, the M119 regrinds weren't terribly expensive in Europe, but shipping the cams overseas both ways would be spendy due to the size/weight. For me personally, it was the complete lack of data provided by those 2 vendors which kept me from pursuing it further. All I wanted was a simple before/after dyno graph.

 

[Beater400E]

Search the forum for past discussions on Hagmann and Dbilas regrinds. The base circle is reduced which could cause issues. Main concerns are:

1) Verify max lift with stock valve springs (may be different with single springs vs dual springs)

2) A spacer "button" might be required under each lifter due to the reduced base circle

Pre-tariff, the M119 regrinds weren't terribly expensive in Europe, but shipping the cams overseas both ways would be spendy due to the size/weight. For me personally, it was the complete lack of data provided by those 2 vendors which kept me from pursuing it further. All I wanted was a simple before/after dyno graph.

Right, I figured a valve lash caps would be able to compensate for the reduced base circle. Springs would have to be checked for sure, but I'm certain I could find an off the shelf option that would work if needed.

There are regrinders in the pacific northwest that could probably do it, which eliminates pricey shipping and tariff concerns. Obviously they couldn't give before and after dyno numbers since they regrind all kinds of cams, but they could certainly apply a proven grind profile based on the specifications of the engine and their experience with other similar applications.