E36 M3 Schrick 276/270 cams DYNO

[vollosso]

That torque is for sure not wheel torque. Our fully built race engines get to 260 wheel torque. That's engine torque at best.

What compression are you using?


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[vollosso]

I kinda wanna see what mine will do for torque without the limiter. Not gonna post it anywhere else as I don't wanna jinx it, but I might wanna push the NA limits of the S52 next year with some higher compression and E85. I'll prob need some better headers tho... LOL

It was a stage 2 head with the mild schricks. Was pretty impressive how early it came on and how long it held through the range.

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It was also on a 200k bottom end iirc.

I really look forward to seeing your results brakeless.. your headwork seemed to help also so was a fun dyno day with lots of comparison. Wish andrew would send me the results...


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[ScotcH]

What compression are you using?


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12.5:1 or 13:1, depending on version.

[vollosso]

12.5:1 or 13:1, depending on version.

@foda 260wtq?


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[ScotcH]

@foda 260wtq?


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@foda? No comprender. The 260 (actually I think it was 256 or 258) and 305 whp is a 3.2L s52 12.5:1 cr, 290 cat cams, MoTeC, etc. Spins to 7600 rpm

[vollosso]

@foda? No comprender. The 260 (actually I think it was 256 or 258) and 305 whp is a 3.2L s52 12.5:1 cr, 290 cat cams, MoTeC, etc. Spins to 7600 rpm

Hah sorry foda is another guy in this thread who needs a set if pistons

i have been pushing him to go like 13:1 and e85 with his 286 cams.


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[ScotcH]

Hah sorry foda is another guy in this thread who needs a set if pistons

i have been pushing him to go like 13:1 and e85 with his 286 cams.


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Lol, sorry Yeah, compression definitely helps torque, and with good cams, tune, exhaust, and TB (we run 80mm) it makes a big difference.

[Foda420]

80mm is a really big TB lol. Biggest I've seen are the VAC 75mm units. I'm still on a stock bottom end, going on 130k now. Given that, I'm running a limiter. After some experimentation (another story for another thread) I determined I need about 4.5mm of shim so I have a 4.8mm shim in there. My head is fairly aggressively ported on the exhaust but untouched on the intake. Stock valves with supertech dual springs and retainers.

Ideally I'd go 12.5:1 or so with bigger reliefs for full vanos travel, and run E85. With the ATI damper and the lightened assembly I think 7800 is possible, maybe even a little more but who knows for how long. As it is, my motor is still making power and torque at redline, no reason to believe there isn't more in it with more compression & revs. And E85.

But then how are you running to 7600 rpm safely? Have you done bottom end work? We set my limit at 7300 and I'm trying to self police and only use it to hold gears in autox. But it's hard haha

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[pbonsalb]

What 80 mm TB do you run? And is it on a ported plastic M50 intake?

[ScotcH]

What 80 mm TB do you run? And is it on a ported plastic M50 intake?

It's an accufab or some shit. Modified Mustang TB. The intake is a modified schrick intake (bigger plenum box and 90* elbow welded on). We also run a an M50 with 90* elbow on it. That one is a 70mm TB, similar power and torque. I think 80mm is actually overkill. We do run the ATI damper on it, and 12lbs flywheel/clutch. Crank is balanced, but not lightened.

Intake:
s52.jpg

[jakermac]

meh-octane

So cold!!

But then how are you running to 7600 rpm safely? Have you done bottom end work? We set my limit at 7300 and I'm trying to self police and only use it to hold gears in autox. But it's hard haha

Though my bottom end is built as well and I have an ATI damper, I'm rev limited to 7,800 in 1st and 2nd (because AutoX) and 7,200 in 3rd through 5th. That something that's easy to do in the OEM DME. I was told by Mike at TRM years ago that the nastiness in the harmonics of the S52 crank happens at 7,400rpm, and that you either stay below it, or go through it quickly to minimize the impact. Bouncing off the rev limiter at 7,300 to 7,500 is probably the worst thing you could do.

Here's the headers you all need!! Thanks Zack (vollosso). And the 75mm VAC is going on at the same time. Then it's time for a set of these 276/270 cams!!

[ScotcH]

Those are pretty sweet collectors! And stepped primaries ... drool.

[vollosso]

Those are pretty sweet collectors! And stepped primaries ... drool.

Two steps equal length :omg


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[vollosso]

So cold!!



Though my bottom end is built as well and I have an ATI damper, I'm rev limited to 7,800 in 1st and 2nd (because AutoX) and 7,200 in 3rd through 5th. That something that's easy to do in the OEM DME. I was told by Mike at TRM years ago that the nastiness in the harmonics of the S52 crank happens at 7,400rpm, and that you either stay below it, or go through it quickly to minimize the impact. Bouncing off the rev limiter at 7,300 to 7,500 is probably the worst thing you could do.

Here's the headers you all need!! Thanks Zack (vollosso). And the 75mm VAC is going on at the same time. Then it's time for a set of these 276/270 cams!!

They look better to me now that the wounds have healed

Really looking forward to seeing the outcome.


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[GG///M3]

@foda? No comprender. The 260 (actually I think it was 256 or 258) and 305 whp is a 3.2L s52 12.5:1 cr, 290 cat cams, MoTeC, etc. Spins to 7600 rpm

Solid lifters?


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[pbonsalb]

There was member selling 3 sets of kromerkraft headers recently on bimmerforums.

[jakermac]

They look better to me now that the wounds have healed

Really looking forward to seeing the outcome.


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Self inflicted (fab injuries) I hope.

[Garage5]

Update? I have cat cams 282/276, motor 11.5;1 compression, Carrillo rods, head work, long tubes and 75mm TB and made 305whp at 73xx rpms. Once I retire the car from full track duty was thinking of going back to these hydraulics lifter cams. Solid lifter maintenance is simple annoying

Would love to know what you made with the upgrades. My next cam will be the 276/270.

[rajicase]

Update? I have cat cams 282/276, motor 11.5;1 compression, Carrillo rods, head work, long tubes and 75mm TB and made 305whp at 73xx rpms. Once I retire the car from full track duty was thinking of going back to these hydraulics lifter cams. Solid lifter maintenance is simple annoying

Would love to know what you made with the upgrades. My next cam will be the 276/270.

I ran the VAC 286/272 cams on hydraulic lifters and supertech dual valve springs and spun to 7500 rpm. Id suggest those over the more mild schricks..

[rajicase]

Hah sorry foda is another guy in this thread who needs a set if pistons

i have been pushing him to go like 13:1 and e85 with his 286 cams.


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Man if you are gonna pull and build a motor you might as well do it in preparation for forced induction.
A 10.5:1 s52 with wild cams totally tapped out can get to 290ish, a 13:1 could maybe see 310-320 and thatd be pushing the envelope considering that's uncharted territory. Coming from someone who went the big cam route and then went turbo I cant imagine doing that kind of work for 310whp... I think turbo is in Foda's future. Pass the torch man, let someone else revive team 286 and come to the dark side.

[GG///M3]

All this n/a talk, but not much sadnesses. Well besides Photobucket


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[Foda420]

I think turbo is in Foda's future. Pass the torch man, let someone else revive team 286 and come to the dark side.

Haha man a turbo E36 might be in my future but it won't be this car or this motor. I had trouble with temps at the track this weekend as is, turbo is doing me no favors there. Besides, the throttle response I get is pretty phenomenal and the car is really well balanced with this power.

S54 is certainly the better choice, but at this point eff it LOL. I really like my little S52, and on a personal level, love building things and seeing how far they can go.

All this n/a talk, but not much sadnesses. Well besides Photobucket

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All smiles here

[pbonsalb]

More power means more heat -- no getting around that. People do track turbo E36, but they have to make sure the heat management is under control. The typical street turbo build does not suffer heat issues.

[GG///M3]

Haha man a turbo E36 might be in my future but it won't be this car or this motor. I had trouble with temps at the track this weekend as is, turbo is doing me no favors there. Besides, the throttle response I get is pretty phenomenal and the car is really well balanced with this power.

S54 is certainly the better choice, but at this point eff it LOL. I really like my little S52, and on a personal level, love building things and seeing how far they can go.



All smiles here

Which cooling system do you have on the car?


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[Foda420]

Which cooling system do you have on the car?


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A pretty good one I thought lol.

PWR 4 row radiator, Stewart WP, 80/88 fan switch, 88* thermostat, silicone hoses, aluminum T-stat housing, brand new aux fan and a puller fan on the other side as well, plus the MM underpanel with radiator baffle.

My temps got as high as 105*C coming off track on Saturday. Obviously not good. There's something else afoot here though as the car has been running hotter than normal. I will be posting in the cooling thread so as not to derail this one any more.