Shrick 288 Cam. yay or nay?

[digger]

+1 i went with a 272 cam and wish i had a 284/272 or just a 284

it has been a while since i have seen how a M20 behaves on stock motoronic, AFM and schrick 284/272.

I know some who hard problems like rough ,low idle and cold start warmup issues.

For those that run the 284/272 on motronic how does it compare to stock for idle and cold start and driveability?

[nando]

Mine ran totally fine, I'd think those with issues already had problems that a cam upgrade merely brought to light.

[Brandon12V]

I wouldn't suggest spending the extra money on a 284/272 unless you plan on port matching the exhaust side of the head. extruding the manifold wouldn't be bad idea either. I wish I had prior to reinstalling my head. the 272 cam made a difference, but complementing mods are the only way to really get your money's worth out of it. Oh, and my 272 runs better in cold weather. it bogs a little bit on warm up, which I'm still trying to track down(possibly TPS or ICV issue). I'm using a MarkD 19lb socket. Nice tune but I should have spent the extra dough on a MAF conversion. It's on the list for the future.

[nando]

it probably runs poorly warm because it's not tuned.

I don't see what port matching the exhaust has anything to do with it - it's the intake side of the 284/272 that flows more. You can take care of exhaust restrictions by using good extractors. The lift and duration of the 284/272 actually works fairly well inside the limitations of the stock 885 ports.

[Brandon12V]

nono it bogs on warm up IE not at operating temp. Almost like its getting too much fuel. I'm using bosche type III's with the tune. my timing is advanced about 4 degrees so I may try to retard it and see what happens. Once the motor is as operating temp, it runs completely fine but I can tell the tune is not made to compensate longer duration & higher lift. I tried sending mark a few emails about getting a custom chip made for my setup to no response... which is why i decided to go with W.A.R. instead in the future.

[MonkeyMan]

it probably runs poorly warm because it's not tuned.

I don't see what port matching the exhaust has anything to do with it - it's the intake side of the 284/272 that flows more. You can take care of exhaust restrictions by using good extractors. The lift and duration of the 284/272 actually works fairly well inside the limitations of the stock 885 ports.

bump for current head project..

good extractors meaning headers?
I'm planning to run the Schrick 284/272, MM beehive springs, and IE HD rockers on my 2.7 stroker (76.8mm crank from 323i), which will be at 10.0:1 with the new pistons..
I won't be doing any porting on the intake, just port matching on the exhaust side..
My thinking is that this cam will take full advantage of the already large intake ports of the 885, as long as the exhaust side is taken care of..

Will this get me to my goals of 200whp, 200wtq with a nice torque curve and 7500rpm capability?
Thoughts?

[2mAn]

how big are you injectors Andy?

[tinkwithanr]

bump for current head project..

good extractors meaning headers?
I'm planning to run the Schrick 284/272, MM beehive springs, and IE HD rockers on my 2.7 stroker (76.8mm crank from 323i), which will be at 10.0:1 with the new pistons..
I won't be doing any porting on the intake, just port matching on the exhaust side..
My thinking is that this cam will take full advantage of the already large intake ports of the 885, as long as the exhaust side is taken care of..

Will this get me to my goals of 200whp, 200wtq with a nice torque curve and 7500rpm capability?
Thoughts?

From what I've seen out of other builds, I don't think your going to hit 200 wtq with just a 2.7. The extra rpm might let you hit 200 whp, but it'll be close if your using the stock intake manifold. Since your planning to run to a higher rev limit, I would go ahead and bump up to the 288, it likes revs at the cost of some low end torque.

Also, make sure to leave a lip on the exhaust ports so the header inlets are a little bigger than the exhaust ports on the head. This helps to prevent reversion.

[nando]

I don't know if those MM springs are really what you want, definitely not for a 288. they're meant for milder cams with large amounts of intake/exhaust seperation and perhaps 7000rpm max.

for the 272/284 new stock springs are fine, for the 288 you want something much stiffer than the MM beehive springs.

[MonkeyMan]

I don't know if those MM springs are really what you want, definitely not for a 288. they're meant for milder cams with large amounts of intake/exhaust seperation and perhaps 7000rpm max.

for the 272/284 new stock springs are fine, for the 288 you want something much stiffer than the MM beehive springs.

so what you're saying is that new stock valve springs are better suited handle a 284/272 cam than MM bee-hive valve springs? Doesn't seem right..
There is of course the Schrick valve springs that they recommend using with their higher lift cams at a slightly higher price (MM=$300/set vs Schrick=$336/set), but I've read good things about MM's hardware in general, including these springs.. would they be better suited to a milder 272 cam? I'm not so sure I want to sacrifice the torque that the 284 may give up, unless it's not significant (as in, the gain in top-end is more than the loss in low-end)..
but damn, I still love the idea of a high-revving 2.7 M20..

[nando]

they are designed to work with their own cams. there are spring graphs for a bunch of springs including the MM springs on E30tech.

[digger]

they are designed to work with their own cams. there are spring graphs for a bunch of springs including the MM springs on E30tech.

the thing to note about MM cams is they do have fast ramps but utilize a much smaller retainer and beehive spring so the mass the springs need to control is quite a lot less than using a stock double spring/ retainer and it probably comes out in the wash for the most part. for a schrick 288 use the schrick springs (or vac ones) and for less a cam use a new set of stock ones will be fine..............one of the members on this forum i believe uses a MM spring set with a 288 but i personally would not.

[TobyB]

I run a 314.

But then, m10racecar.

see, the details DO matter!

t