Hello! I have a problem with braking conrods. After 1,5 bar , the A/F meter shows green light, everything should be normal, but... http://www.zone.ee/calibrablack/S2/IM002703.jpg and the car doesnt move so good as it should be. when its lower than 1,5 bar then its ok. Im using K24/7200 and RS2 E/manifold. Ive changed the distributor gear (BRONZE) , cnocksensors (both), checked everything, the computer shows no errors in ECU. Has anybody had same problem.
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1/4 mile 11.656 @ 197km/h
1/8 mile - 7,73 s @ 154km/h
1 km - 249km/h
1 mile - 269km/h -
Ouch!!!91 S2 coupé - RIP
98 S8 - Luxury barge -
More proof that the K24-7200 can bend rods.SSComment
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actually, it's not a turbo, it's the fuc*ing ignition problem...i think...Last edited by prr; 5 April 2006, 21:41.Comment
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AnLe wasn't as lucky...
Don't ask where the other rod went.
You seem to have gained one.
SSComment
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Ah, that old problem. Audiman has a BTDT on that. Hence this threadOriginally posted by prrSSComment
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This has been known to happen after steam cleaning the engine bay of a 3B.Comment
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I`ve got the same problem with my 91 coupe, and I think it`s an ignition-problem..
It accures only on max pressure..
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You need a better spark to ignite fuel on high boost. That's physics. All normal spark plug/ignition system testing/development is done in pressure chamber. That is because there is more fuel vapour/air between the electrodes - you need stonger (also maybe higher voltage) pulse to break that.Originally posted by S2RacingI`ve got the same problem with my 91 coupe, and I think it`s an ignition-problem..
It accures only on max pressure..
Sau200 20vt 88' 3b, human carrier
CQ typ85 with AAN inside, see project blog at http://kwlw.blogspot.comComment
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I have tried with Denzo iridium (IK22) and NGK platinum. And allways in fifth silinder, once was fourth and fifth (both). What is the best solution to get higher voltage? any examples1/4 mile 11.656 @ 197km/h
1/8 mile - 7,73 s @ 154km/h
1 km - 249km/h
1 mile - 269km/hComment
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I'm pretty sure You detonated. You need standalone / remap.
If You want better spark for dizzy-ignition, You need CDI amplifier. But I can't see how these relate to bending rods...
In case there is no situation, where the nose of the distributor points in middle way of two contacts in cap, and under high boost hits the spark into wrong cylinder.Everything less than 2 bar is considered to be naturally aspiratedComment
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Thats a good point, have you checked your static timing very carefully? turn the engine in the direction of travel so the marks line up. Poor HT leads could also be a problem?
Or too much boost at low RPM? = too much torque..Comment
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This problem is only due to detonation, it has nothing to do with the ignition coil/spark plugs/leads/ECU output stages whatsoever. It is only detonation that bends rods like that. If the ECU is mapped properly with NO detonation at all EVER, then nothing like this will happen, newsh is running 1.7-1.8 bar on an RS2 turbo and stock 3B rods and as far as I'm aware his rods are still straight... and he's only one of many...
HTH,
Mihnea'98 Silver Grey 2.7T S4, dual 2.75" turbo back exhaust with no cats, FMIC, BIG injectors, 10 Bar motorsport fuel pump, modded RS4 turbos, tubular exhaust manifolds, custom intakes, RS4 MAF, Bilstein PSS9, H&R ARBs, 19" BBS CH, custom remap, 511 BHP/505ft-lbs
www.MRCTuning.com
info@MRCTuning.com
Workshop DirectionsComment
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Plenty pictures of bent rods but detonation also leaves its mark on rings , piston crowns and combustion chambers.
Why don't you clean the piston crowns and combustion chambers (carefully) and post a photo of them.Comment
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