Can I use OEM headgasket to a 450+ projekt

Post by **spen** » Thu Apr 17, 2008 2:16 pm

matias

I think you worry too much about your CR. You should be fine at 1.2 bar without lowering the CR. I am on 100,000 mile OEM head gaskets (standard compression ratio) and I make 499.1 bhp from 26 psi boost (just over 1.7 bar). I may be pushing my luck with my set up!

I know my way is a crude shove the air in with massive force, but I'd still be very interested to see what bhp figures you can get from 1.2 bar boost.

Post by **Blue_Thunder** » Thu Apr 17, 2008 2:20 pm

Do you do your own mapping Spen?

Post by **spen** » Thu Apr 17, 2008 3:11 pm

Doug put the MRC base map in, and I then slowly slowly pushed it to the very brink with the adaption channels and 99 octane fuel.

I could remap it completely, but I'd have to de solder the flash and socket the ecu to do it. I know about the boot mode pin and how to feed the ecu a small 32 byte bootstrap but I've never done this to a microcontroller with Tx and Rx tied together. If I was to do it I'd have to solder the socket in so I could plug in my eprom emulator so I could change any byte whilst the ecu was running to verify things.

I know where the checksums are, how the checksums relate to the memory segments of the flash. I even know where some of the tables are. I've got bin files from several ecus and modified files which provide a good starting point. I've used ida to dissassmble the binaries, a la Andy Whittaker (though I am no where near as proficient as he is

I'm not even on the same planet

)

Against that idea:

MRC are really helpful. Doug's remapping service is very reasonable and between Doug and Minhea they know a hell of a lot more than I do about both the car and the ecu.

Why spend 6 months hacking around when a few hundred quid saves you the time and buys you others' experience. Honestly I've done this with other ecus and it's tedious, endless opcodes and a desk full of wires, ecus, flashing lights and variable resistors. The worse one was a subaru legacy GTB (sequential twin turbo) I rebuilt the boost control routine opcode by opcode to run a massive single turbo. It took ages and that ecu was simple compared to the horror that is the me7.1.

So, no, I don't reflash me7.1 ecus. Anyone thinking of a diy reflash, just take it to Doug (or other tuner of your choice). Honestly!

[/hijack]

Post by **ZKNY** » Thu Apr 17, 2008 5:35 pm

matias wrote:
AdamS4 wrote:$90 each from 034 Motorsport
The headgasket from 034 will drop compression 0,7 points.. I think that is to mouch, if I dont want to run max boost.... Or am I wrong?

just go w stock then. but lowering the compression will definitely help. get the MTM one. its more expensive, but thicker also. so more compression drop.

Post by **dazzer** » Thu Apr 17, 2008 6:10 pm

spen wrote:matias

I think you worry too much about your CR. You should be fine at 1.2 bar without lowering the CR. I am on 100,000 mile OEM head gaskets (standard compression ratio) and I make 499.1 bhp from 26 psi boost (just over 1.7 bar). I may be pushing my luck with my set up!

I know my way is a crude shove the air in with massive force, but I'd still be very interested to see what bhp figures you can get from 1.2 bar boost.

Holy f**k - Mind me asking what your set-up is - Turbos, tubular manis?

Post by S4 » Thu Apr 17, 2008 6:24 pm

no if you look at the 034 site it says they can supply any you want?

Darren

Post by **spen** » Thu Apr 17, 2008 7:48 pm

@ dazzer: http://www.rs246.com/index.php?name=PNp ... &start=510

Post by **buzzard** » Thu Apr 17, 2008 8:08 pm

nice link spen......specs are very interesting to look at.
especially when your car is in bits in banbury.......

Post by **Doug_S2** » Thu Apr 17, 2008 8:16 pm

It is not here - unless i have lost it!

Post by **spen** » Thu Apr 17, 2008 8:45 pm

that's not what you want to hear....

Post by **Doug_S2** » Thu Apr 17, 2008 8:48 pm

doh - i read that as being spens car being in bits here! Buzzards is definitely here!

Post by **spen** » Thu Apr 17, 2008 9:01 pm

@ Doug:

naa, I got off my backside and pulled my own engine this time. But I will be back Doug. In fact you have PM.

Post by **Doug_S2** » Thu Apr 17, 2008 9:05 pm

did that company that fitted your turbos without seals say anything>

Post by **spen** » Thu Apr 17, 2008 9:11 pm

Yes. I'm not going to post anything though.

Post by **dazzer** » Thu Apr 17, 2008 10:02 pm

spen wrote:@ dazzer: http://www.rs246.com/index.php?name=PNp ... &start=510

Mmm thanks very interesting. 28psi on K04s - you like living on the outer edge then.

Which manifolds are they Spen? Had any problems with them?

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