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#101 | |
Board Member
Join Date: Sep 2008
Location: Tacoma WA
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![]() Quote:
This could be due to the IPD cam gear problems you suggested. |
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#102 |
Board Member
Join Date: May 2015
Location: Swampscott, MA
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![]() Yeah, that old style IPD gear is junk. At least the one we measured is. Glad they redesigned it. I'm wondering if there was a redesign in the grind of their turbo cam around the same time? I seem to remember their site mentioning a 110* lobe separation on the cam and I see that is now gone. Perhaps we measured a different version of the cam? The one you had measured by Delta looks really awesome for a street turbo car whereas ours looks like a weird inbetweener grind for NA/Turbo...
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1993 944 B230FT/M90 thread here: http://forums.turbobricks.com/showthread.php?t=345277 1991 245 B230FNA/M47 no thread: secret LeMons car technology abounds 1991 245 B230F/M47 no thread: very boring (320k!) |
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#103 |
Turbo, what?
Join Date: May 2004
Location: OR
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![]() I think that is how it was originally sold and advertised? But maybe not. I did run it in my NA car once and wasn't too excited about the experience because the dyno curve looked almost exactly like my A cam curve, if I remember correctly.
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Kyle - NLMGG: '91 244 NA DD/Track - General Leif: '71 142 Endurance Racecar - The General's FB page - Oregon Volvo Tuners - Died ![]() |
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#104 |
Board Member
Join Date: May 2015
Location: Swampscott, MA
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![]() Maybe we can measure enough of these and find a production split. Or ask IPD.
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#105 |
Board Member
Join Date: May 2015
Location: Swampscott, MA
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![]() Alright, so I sent an email to IPD, and here's the reply I got:
"The designs have been the same for awhile, the supplier has changed now that they are billet and not cast." Hmm... |
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#106 |
Turbo, what?
Join Date: May 2004
Location: OR
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![]() Hmm, indeed... I guess, did you just ask if there was a production change or did you ask if someone has actually verified that their timing marks are correct? Haha
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#107 |
Board Member
Join Date: May 2015
Location: Swampscott, MA
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![]() I asked if there were any design revisions, but I suppose that's a fair question too.
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#108 |
Board Member
Join Date: Jun 2009
Location: Swampscott, 01907
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![]() K13 Turbo added.
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#109 |
Turbo, what?
Join Date: May 2004
Location: OR
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![]() ![]() We're running the non-turbo version in the General Leif, which should be the same aside from the 106° LSA instead of 114°. It looks like there's a large chunk of duration to gain by using tight valve clearances with this camshaft! It has much more off seat duration than even the OC352 "rally" cam, but at .025" and .035" of lift the rally cam has more duration. After that, they're equal for a little bit before the K13 takes over again having fatter and taller lobes. The factory H cam has a smidge more duration than the K13 between .025"-.250", then after .350" the K13 has more(as well as .5mm more peak lift on the intake lobe and 1mm more peak lift on the exhaust lobe). Maybe this OC352 rally cam isn't nearly as aggressive as you thought, Shoestring... I've run the K13 in my car and still run it LH2.4 without issues. ![]() Maybe I should adjust the intake valves on the General Leif a bit tighter to give us some more top end. ![]() Last edited by klr142; 10-21-2019 at 04:30 PM.. |
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#110 |
Board Member
Join Date: Jun 2009
Location: Swampscott, 01907
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![]() On this K13 you can see the transition between the ramps and the flanks on the dial indicator. It was pretty crazy.
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#111 |
Board Member
Join Date: May 2015
Location: Swampscott, MA
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![]() It was definitely a lot more aggressive than I expected. Side note: In the process of measuring this one up we tried to find the lift at which ENEM publishes their duration, but we were unsuccessful. Seems like it's something somewhat arbitrary, 0.8mm or the like.
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#112 | |
Turbo, what?
Join Date: May 2004
Location: OR
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![]() I wonder how much difference it makes power wise to play with the lash because of it! It seems like it's definitely worth trying if there was a way to measure power. I don't know that I would want to pay for dyno time to adjust all the valves, though. Well, if I only do the 4 intakes, maybe it wouldn't take too long...
It's a "280°" camshaft according to their notes, and based on that info, indeed it seems like it's measured somewhere likely around 0.8mm. Odd! Here's the info I posted earlier: Quote:
Last edited by klr142; 10-21-2019 at 05:32 PM.. |
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#113 |
Turbo, what?
Join Date: May 2004
Location: OR
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![]() I have another cam in my possession that may be an "RSI Stage 3 NA cam", or may be a copy of the ENEM C2 camshaft that measured at .550" lift, 264°/264° duration and 336° at .012" according to the same place that measured my K13 as 240°/240° at .050" and 288°/284° at .020", for what it's worth.
That seems like a big jump at .050" and explains why it's a performance beast! I'd like to get it back in a motor sometime to play with but I'm still scared to run lash caps under the buckets in addition to shims on top... When we ran this cam last(still on LH2.4!), the engine through a rod and had a piston slam the combustion chamber. One of the lash caps was missing which may have been the or maybe not because I know we were running excessive ignition timing?! |
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#114 |
Turbo, what?
Join Date: May 2004
Location: OR
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![]() For reference and what it's worth, I confirmed with Reine at Agap.se that their measurements are taken at zero lash: http://www.agap.se/Utrustning-2.html.
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#115 | |
Board Member
Join Date: Jun 2009
Location: Swampscott, 01907
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![]() Quote:
If it is, I like it. |
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#116 |
Turbo, what?
Join Date: May 2004
Location: OR
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![]() Correct! You pick LSA(or talk to them about your specs and they help*) and profile. It's an extra charge for a dual profile camshaft, but sometimes that is ideal to help with torque. Erland Cox likes to recommend that in NA builds, I think he may have mentioned running around 10° less duration and .5mm less lift on the exhaust side.
Last edited by klr142; 11-05-2019 at 07:00 PM.. |
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#117 | |
BRANDSCHUTZVORSCHRIFTEN!
![]() Join Date: Dec 2002
Location: mont, AL
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![]() Quote:
__________________
"They bum rushed them in their own crib, they drank all their beer, they partied with their ladies and they left with the trophy" Now with in-house Dyno tuning! Megasquirt Tuning! Plug and play LH 2.4 Megasquirt, now with stealth mode! |
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#118 |
Turbo, what?
Join Date: May 2004
Location: OR
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![]() Looking at AGAP's offerings and my notes on the ENEM C2, their R33-265-14.0 is pretty close in rough measurement, it seems.
I'm waiting to hear back on what he thinks about running lash caps under the buckets in addition to the standard shims in the buckets. People say it's ok, other people say it's sketchy, and I've seen one lash cap disappear(or at least, I'm certain it was there initially) in an engine of ours that blew up, so I think it's sketch as well... But, I'd really like to try that camshaft out!!! |
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#119 |
Turbo, what?
Join Date: May 2004
Location: OR
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![]() And here is Peter's measurement of the Enem C2 previously posted.
http://forums.turbobricks.com/showpo...2&postcount=72 Last edited by klr142; 11-06-2019 at 02:52 PM.. |
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#120 |
Board Member
Join Date: Jun 2009
Location: Swampscott, 01907
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![]() Dang
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#121 | ||
Turbo, what?
Join Date: May 2004
Location: OR
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![]() Me:
Quote:
Quote:
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#122 |
Board Member
Join Date: Jun 2009
Location: Swampscott, 01907
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![]() Grip it n rip it
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