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      07-10-2017, 05:11 AM   #1
Quepps
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800bhp requirement recomendations? Meth or Turbo

Hi All,

Has anyone on here had much experience with +800bhp options on F10 M5.

What's the best way to go out about this? I've heard mixed reviews, upgraded Turbos and meth?

I'm currently running a 720 map with Eisenmann sound pipe. I have been advised to stay away from Meth as a last resort. But then others I have read that its the best way to hit these kind of figures with out major engine work...I'm genuinely interested it what other M5 owners have done to reach 800 and above.

Any feedback or member example experiences would be great.

Thanks

Simon

Last edited by Quepps; 07-10-2017 at 05:28 AM..
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      07-10-2017, 11:33 AM   #2
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you can make 700+ whp
with jb4,meth kit,dp,cp,intake ,
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      07-10-2017, 01:48 PM   #3
Quepps
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Thanks.

I've been quoted 4K for turbos but have someone else in my ear saying Meth all day long. But then I want it done properly and as safe as possible.

I'm sure someone on the forum must be able to guide me. Hopefully someone responds.
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      07-10-2017, 07:11 PM   #4
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you want 800 you better be doing turbos.
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      07-12-2017, 02:42 AM   #5
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Do both, turbos should be more effiecent and reduce EGT and IAT's.

Use water/meth injection to support fueling, keep IAT's and knock in check and clean the engine internal. Its a good safety net if manage and set up correctly with something like a JB4.
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      07-12-2017, 04:18 PM   #6
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Quote:
Originally Posted by Shepp80 View Post
Hi All,

Has anyone on here had much experience with +800bhp options on F10 M5.

What's the best way to go out about this? I've heard mixed reviews, upgraded Turbos and meth?

I'm currently running a 720 map with Eisenmann sound pipe. I have been advised to stay away from Meth as a last resort. But then others I have read that its the best way to hit these kind of figures with out major engine work...I'm genuinely interested it what other M5 owners have done to reach 800 and above.

Any feedback or member example experiences would be great.

Thanks

Simon

looks like your in the uk like me, ive fitted meth pm me if your interested in fitment / power etc
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      07-25-2017, 05:09 PM   #7
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you can probably do 800bhp on stock turbu but it will be with a very aggressive map.
You are better off getting Pure stage 2 turbos instead
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      07-26-2017, 02:27 PM   #8
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The boost pressures required to push the factory turbos to over 700hp is
well outside of the optimal rotational speeds. The reason that alternative
fueling is required at those power levels is to battle the increased IAT's
and improve the knock threshold. Even after that is "under control" the
life of the turbos will be dramatically reduced which will lead to premature
wear, or worse, turbo failure.

Different tuners have different calibration strategies and criteria for
balancing performance/reliability, which is why you are hearing soo many
mixed reviews. There are very few turn key solutions for the power levels
you are inquiring about which is why our best recommendation is to stay
with a strategy that has been tried and true across a large number of
satisfied owners. The alternative is that you make yourself aware of the
risks associated with tried to push the limits, and comfortable with the
potential outcome, good or bad.

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      08-06-2017, 03:27 AM   #9
Quepps
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Thanks for all all your comments, appreciated.

My local tuner have advised to remove stock turbos and upgrade internals? 4K for total works. They said I should archive 800bhp with this upgrade. I see others have removed and replaced entirely with Pure 1&2 turbos.

Has anyone ever just had the internals tuned?
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      08-06-2017, 08:32 AM   #10
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Are you looking for 800hp or 800whp? Those are two very different things.
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      08-06-2017, 08:43 AM   #11
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800hp is what I'm looking for
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      08-06-2017, 08:55 AM   #12
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So that's around 650-675whp... just get a flash, downpipes and drop a K&N filter.
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      08-06-2017, 09:35 AM   #13
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Apologies I meant WHP

Already had DMS TUNE & eisemann mid-pipe. Currently 721bhp on the dyno
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      08-06-2017, 09:45 AM   #14
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Then turbos, meth all bolts on plus JB4/BCM stacked with a flash.

Note that once you are at 800whp motor life is short. Pretty much everyone who ever ran close to 800whp has blown their engine. Very little room for error so unless you can tune your own car don't do it!
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      08-11-2017, 10:13 AM   #15
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What is the safe side to run on this engine allmotor ...is that 650 675 whp is safe for engine or still a chance to blow engine?
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      08-11-2017, 10:21 AM   #16
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650-675 is safe assuming proper fuel is used. Catastrophic events can occur even at these levels but should be fine on a well maintained and well running setup. Keep in mind 675whp is between 750-775hp at the crank. Nothing to sniff at!
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      08-11-2017, 02:41 PM   #17
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Quote:
Originally Posted by allmotor_2000 View Post
650-675 is safe assuming proper fuel is used. Catastrophic events can occur even at these levels but should be fine on a well maintained and well running setup. Keep in mind 675whp is between 750-775hp at the crank. Nothing to sniff at!
Listen to this man.

You can get 700 crank hp with nothing but a tune. The higher power you go the more cooling issues there are going to be.

I personally don't recommend going above 700 crank hp without upgrading the cooling and the rest of the drive train and doing all of that properly is going to get costly.
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      08-12-2017, 03:00 AM   #18
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Many thanks for all you help. With much thought with everyone's help I'm going to stay clear of Meth and turbo. Seems like too much worry for me....

I haven't fitted downpipes as I don't want the car being to loud. Are these a big improvement? Is it a good option to Keep rest of the exhuast system stock and just fit DP's?

How much power will the catless DP's give me?

I see some people are just removing the stock DP's internals? Drilling them out.

Will I need my Ecu tuned again?

Many thanks for any help.
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      08-12-2017, 09:35 AM   #19
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In my opinion, 650/650 is enough for this platform. You go beyond that and it's either good night sweet engine or it's going to cost you an arm and a leg to keep it reliable (supporting mods for a small market car--AKA the M tax).

In a world of finite resources, I would rather spend the 40k on a p-car than mod the M5 to kingdom come. In a perfect world where I dont have to choose, then obviously I would opt for a monster sedan and a p-car or Ferrari. Congrats to those members who can afford both!!
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      10-25-2018, 10:03 AM   #20
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Ecu tune and downpipes get you to around 700-720 bhp crank, exhaust doesn’t add much more maybe 10-15bhp

The next step for bang for buck is the meth and jb4, although I recommend getting a gearbox remap and upgraded clutch as you clutch WILL slip.

All this then would be remapped in a stage 3 map and your looking at around 780-800 crank HP. But of course this will put pressure on the stock turbos and drivetrain, so your call.

Next stage is where is gets very expensive, you need new turbos, ( pure turbos are about £4k) new cooling system, and new drivetrain otherwise it will break. Next most would recommend having the engine rebuilt.

If you do this your get 1000 bhp, but it will cost you about £12 grand, maybe more on top of the meth stage. So all in all your looking at over £15k , maybe even £20k to get your car to 1000 bhp

Most people, myself included have downpipes and a custom tune, and on 99 fuel I get 720+ bhp. I concidered meth and jb4 which is only about £1000 quid but the racing clutch was £3000k so was put off, plus reliability would severly go down. Some opt just to do meth and have a slipping clutch as a cheap way of getting more power but it’s a very risky game. On my 40k car I decided against it.

So left in as pretty much all m5 owners do on the map and downpipes.
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      10-25-2018, 10:40 AM   #21
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Quote:
Originally Posted by paulm1988 View Post
Ecu tune and downpipes get you to around 700-720 bhp crank, exhaust doesn’t add much more maybe 10-15bhp

The next step for bang for buck is the meth and jb4, although I recommend getting a gearbox remap and upgraded clutch as you clutch WILL slip.

All this then would be remapped in a stage 3 map and your looking at around 780-800 crank HP. But of course this will put pressure on the stock turbos and drivetrain, so your call.

Next stage is where is gets very expensive, you need new turbos, ( pure turbos are about £4k) new cooling system, and new drivetrain otherwise it will break. Next most would recommend having the engine rebuilt.

If you do this your get 1000 bhp, but it will cost you about £12 grand, maybe more on top of the meth stage. So all in all your looking at over £15k , maybe even £20k to get your car to 1000 bhp

Most people, myself included have downpipes and a custom tune, and on 99 fuel I get 720+ bhp. I concidered meth and jb4 which is only about £1000 quid but the racing clutch was £3000k so was put off, plus reliability would severly go down. Some opt just to do meth and have a slipping clutch as a cheap way of getting more power but it’s a very risky game. On my 40k car I decided against it.

So left in as pretty much all m5 owners do on the map and downpipes.
Why isiit risky to have a slipping clutch? Flywheel damage?
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      10-25-2018, 10:48 AM   #22
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Quote:
Originally Posted by Quepps View Post
Many thanks for all you help. With much thought with everyone's help I'm going to stay clear of Meth and turbo. Seems like too much worry for me....

I haven't fitted downpipes as I don't want the car being to loud. Are these a big improvement? Is it a good option to Keep rest of the exhuast system stock and just fit DP's?

How much power will the catless DP's give me?

I see some people are just removing the stock DP's internals? Drilling them out.

Will I need my Ecu tuned again?

Many thanks for any help.
dsmclark has downpipes for sale and lives in Hampshire so not far from you.
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