High HP Turbocharging developments !!!!!

[E36 M3 PWR]

Hi all,


I thought this would be very interesting to all considering forced aspiration on their E36's (particularly E36 M3's) so I'm reposting this in this section...

...I went to this Website of "Rob Green Motorsports" and indeed they claim to lower the compression ratio of the Euro E36 M3's to the ~8 range (8.9-to-1 I believe) with ONLY the use of their special lazer cut "shim" which two standard headgaskets are then installed around it. If this actually works (which I have no reason to believe it wouldn't, since RGM is already proving it in very high HP applications 800+HP E36's, otherwise bone stock bottom end) then this could truly be a new turning point for forced aspirated U.S. spec M3's (and other E36's as well for that matter). Becuase the CR of the euro E36 M3's are even higher than our U.S. spec ones (if I'm not mistaken)...but regardless that 8.5-to-1 CR that such a "shim system" would create would allow us to essentially run MUCH higher boost pressures safely (weather Turbocharged or supercharged). I've requested more information on the detials and availability of the "shim system" from Rob Green Motorsports for my own turbo E36 M3. If this shim works on our M3's as it does on their euro's...(which there's no reason it shouldn't)...you are going to see 14-to-18 psi turbo M3's (on pump fuel...20+psi on race fuel) running around all over the place here. Becuase it will allow you to exploit your M3's stock internals (which I believe are only limited by the stock CR) with extreme FI systems...without the expense of having to touch your pistons or anything else to achieve this (big $$$ savings)....500+RWHP U.S spec M3's will be the "norm" with this CR reduction of this shim. (much more in a well designed FI systems)

...Any mega dollar built engine for a high HP FI systems is primarily for the CR reduction...especially in the S50,S52 series engines (U.S. E36 M3 engines)...though they don't have forged pistons (which is a common misconception that you "need" for high HP FI) out of the factory, the bottom end and internals are VERY strong and can handle MUCH higher boost pressures than we commonly see with the kits available....becuase till now your only options were a thicker head gasket (which can only do so much, usually a one point drop in CR), or changing your internals (pistons) to do the proper CR reduction (high $$$$$ alternative which MOST will never do, or can afford). Don't let the mechanics lie to you...they want your money for the rebuilds. The stock bottom end can handle anything short of truly insane HP levels (over 700 RWHP). My own car will hopefully be the first U.S. E36 M3 to put this shim kit to the test....with 8.5-to-1 CR and a T61 single turbo at 20 PSI...I expect 500+RWHP on my otherwise stock bottem end ;-) My FI system is already ready...just waiting on the CR reduction. I've spoken to a few who are already there

--- Tony D

[Turbo ///M50]

Originally posted by E36 M3 PWR
Hi all,


I thought this would be very interesting to all considering forced aspiration on their E36's (particularly E36 M3's) so I'm reposting this in this section...

...I went to this Website of "Rob Green Motorsports" and indeed they claim to lower the compression ratio of the Euro E36 M3's to the ~8 range (8.9-to-1 I believe) with ONLY the use of their special lazer cut "shim" which two standard headgaskets are then installed around it. If this actually works (which I have no reason to believe it wouldn't, since RGM is already proving it in very high HP applications 800+HP E36's, otherwise bone stock bottom end) then this could truly be a new turning point for forced aspirated U.S. spec M3's (and other E36's as well for that matter). Becuase the CR of the euro E36 M3's are even higher than our U.S. spec ones (if I'm not mistaken)...but regardless that 8.5-to-1 CR that such a "shim system" would create would allow us to essentially run MUCH higher boost pressures safely (weather Turbocharged or supercharged). I've requested more information on the detials and availability of the "shim system" from Rob Green Motorsports for my own turbo E36 M3. If this shim works on our M3's as it does on their euro's...(which there's no reason it shouldn't)...you are going to see 14-to-18 psi turbo M3's (on pump fuel...20+psi on race fuel) running around all over the place here. Becuase it will allow you to exploit your M3's stock internals (which I believe are only limited by the stock CR) with extreme FI systems...without the expense of having to touch your pistons or anything else to achieve this (big $$$ savings)....500+RWHP U.S spec M3's will be the "norm" with this CR reduction of this shim. (much more in a well designed FI systems)

...Any mega dollar built engine for a high HP FI systems is primarily for the CR reduction...especially in the S50,S52 series engines (U.S. E36 M3 engines)...though they don't have forged pistons (which is a common misconception that you "need" for high HP FI) out of the factory, the bottom end and internals are VERY strong and can handle MUCH higher boost pressures than we commonly see with the kits available....becuase till now your only options were a thicker head gasket (which can only do so much, usually a one point drop in CR), or changing your internals (pistons) to do the proper CR reduction (high $$$$$ alternative which MOST will never do, or can afford). Don't let the mechanics lie to you...they want your money for the rebuilds. The stock bottom end can handle anything short of truly insane HP levels (over 700 RWHP). My own car will hopefully be the first U.S. E36 M3 to put this shim kit to the test....with 8.5-to-1 CR and a T61 single turbo at 20 PSI...I expect 500+RWHP on my otherwise stock bottem end ;-) My FI system is already ready...just waiting on the CR reduction. I've spoken to a few who are already there

--- Tony D

Keep us posted _

The only other issue is chip tuning

[bigmark]

It would lower the cr but it may disturb the squish clearance and it might be worse off than with the higher cr. The swirling of the intake charge is critical to avoid detonation and to get a more complete burn. But if they have it in the car and running then they may be ok, I'd like to see some dyno's and see where their boost #'s and timing are at.