Pumpkinate

Has anyone an opinion on this new Weistec kit?

http://weistec.com/anti-surge-valve-...stem-m157.html

I've never run water/methanol injection before. How would this compare to a Killer Chiller in effectiveness?

Would there be much of a gain without retuning? Or would it need a custom tune to get a benefit?

chiromikey

I have an opinion...it looks like a great set up but it's SEVERELY overpriced!!

Deezbluballz

I wonder if this would work on an E550 bi-turbo?

gaspam

all the fastest M5's are running water/meth... I ran it on my audi b5 s4 and it works great. weistec says 30-50 hp gain without retune and up to 100hp with tuning (i think they are getting the 100hp number with W4 kit since this meth kit is included in W4 kit)

if tuning for meth though, you would want to make sure you have some fail-safe in place...

Chiro is right though, its expensive kit... its basically a $400 AEM kit with charge pipes and BOV

cocobeex

Yes, they also have this kit for E550.


Its confirmed. I am thinking getting this too.

M-Theory

About $3,000 after tax and shipping for something this simple is absolutely ridiculous. The kit looks cool, I'd like to try one but for $3700 more you can get the W3 turbo upgrade (special price).


Two pipes (copy the oem design), some rubber, clamps, bov and nozzles does not add up to $3k. Don't give me that R&D bs either cause this was little to none. Well they did print their name 3 times on it, maybe that justifies the price!

kponti

I gotta ask, why the external/secondary bov?

gaspam

^ prevent compressor surge at higher that stock boost levels (especially upgraded turbos)... in theory that could reduce the boost cut that happens between shifts too

cocobeex

what if the weather gets freezing cold ? like -10c

Will the tank get frozen up ??

gaspam

not a problem until about -50 C as that is the freezing point of 50/50 mix

Georgee6086

There's no way the meth will give you 100hp without tune. It will just keep your iats down and give a few points of octane. The BOV is most likely the result of the hp increase. I put meth on my car and it did absolutely nothing except keep Temps down. 20 passes with meth and no improvement on 1/4 times.

gaspam

bov doesnt increase hp, all it does is bleed off excess boost

Georgee6086

What is the benefits of adding this BOV? I thought that our motors had a diverter valve that recycled the excess boost.

gaspam

we have wastegates that are on the exhaust (hot side) of turbo.. our ecu's bleed boost

bov is on the pressurized side of turbo (cold side) and can bleed extra boost that can build up in the intact tract which can cause compressor surge during quick throttle changes and during shifts

bov prob isnt necessary on stock turbos but if upgrading to bigger flowing turbos it could be useful

Pumpkinate

Thanks everyone for your replies. I think this kit would be worthwhile with custom tuning, but not so much without. I'm unlikely to get custom tuning in Australia for an AMG currently. I doubt there is a canned tune to go with this kit that would get the most out of it.

Pumpkinate

I've heard back from Weistec... as Gaspam said they expect 30-50hp gains on a totally stock car but more if you are already tuned. They didn't feel that if you are already tuned that specifically retuning for this mod was really worthwhile as the increase in power would be small. It sounds like they don't have a tune to go with this kit specifically anyway as they advised that they have not dynoed this kit with downpipes and a tune.

With regards to how often the methanol tank needs refilling it is apparently highly dependent on how hard you drive, with consumption being higher with heavier throttle use.

I am changing my opinion a bit because if it will give say 50+hp to an already tuned car with no risks with the tank running out, then maybe it is worthwhile after all....

chiromikey

No way we'll see 50+ hp without being tuned for it...

Pumpkinate

I suspect you are right, would be good if someone could be a guinea pig......

chiromikey

I'd be the guinea pig...but not at that price! $2800+tax is insane even considering the MB tax!

gaspam

guys, the kit weistec is using is AEM 30-3300 meth kit with the addition of a trunk tank, charge pipes and BOV... its about 400-500 depending on what deals you can find on the internet....

I am probably going to do the aem kit if i dont get the W4 kit as the w4 kit includes the meth kit

https://www.summitracing.com/parts/a...A2HxoC7GPw_wcB

chiromikey

It looks like that kit is set up as single injector system and on stock turbos we don't need an ASV anyways. A single injector set up is probably no better or worse but at 1/7th the cost it's a no brainer.

gaspam

they have a dual injector system 33-3301 for 100 more (https://www.summitracing.com/parts/a...3301/overview/) , or just buy injector/nozzle add-on kit for $67

https://www.summitracing.com/parts/avm-30-3312

and yeah on stock turbo no need for the asv

as for power claims i think weistec might be being tricky and referring to power under the curve, or power gained that was normally lost due to timing pull under high heat, adn not actual peak gains... if the water/meth can decrease knock enough to where ~8 degrees of timing are prevented being pulled i could see 30-50 hp saved that would of otherwise been lost due to timing pull on the street... but on a first pull on the dyno with nice cool run, i agree, i doubt it is going to add 50 whp to peak dyno hp figure

on the street it would be another story as anyone that has had a F/I cars knows the difference in feeling of their car on a hot summer day vs cool winter night..... meth would help it feel like your car has the power it does on a cool winter night all year round

Pumpkinate

These kits look simple and inexpensive, could install them in the charge pipes just like Weistec does. I see you can get nozzle mounting bungs to weld onto the pipes like these:

http://www.snowperformance.net/Snow-...gs-p/40120.htm

chiromikey

And that's personally my only goal, prevent pulling of timing and/or boost because of IATs. I chased my tail upgrading the h/e system on the M113k platform and I won't make that mistake twice!

Fairbird

the kit I got for my self, same idea as AEM kit, bigger tank , stainless line (highly recommended) PM me if you want the same in a bit higher price than kit from summit .
I'll be running single nozzle , no need 2 nozzles in our case , everything will mix just fine in the cooler .