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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Sun Nov 24, 2013 8:39 pm 
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Racer5 - that is more than an incredibly well planned and executed mod -
it is actually a work of art!!! =D> =D> =D>

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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Sat Dec 07, 2013 5:35 am 
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Dyno result = 107hp.

21 hp over cultus engine.

Graph shows the extra 21hp and torque are parallel to cultus curve from about 4000 onwards.

Therefore throttle response should be very similar to cultus.


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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Sat Dec 07, 2013 5:56 am 
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Went to eastern creek yesterday.

Best time was 1.5 sec off previous visit. Track temp good and tyre good.

Engine has more torque down around 5000.

Experiencing reduced power throughout lap.

Something is causing reduced power especially on the straight, feels like timing is being pulled with resulting power reduction.

Need to download logged data and send to tuner for analysis.

My initial thoughts are the air temp sensor located in engine bay is recording high temps and ecu is compensating.

I need to build a cool air intake and locate air temp sensor in box.

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Eastern creek 1.54.10, Wakefield 1.12.60 Bathurst 3.05


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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Sat Dec 07, 2013 12:04 pm 
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Photo of my n/a ca intake. Uses a unifilter offroad foam sock inside the 4 inch. http://www.redlinegti.com/images/forum. ... /page3.jpg
http://www.redlinegti.com/images/forum. ... /page4.jpg
You can see between the grille and top rad support all blocked off , together with in front of
exhaust headers.

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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Mon Dec 09, 2013 1:45 pm 
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That's an awesome Dyno result! :shock: =D>

Hopefully you can find the gremlin and see what happens next time out at the track as that should be a great improvement when running properly!

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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Wed Dec 11, 2013 6:42 am 
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blake wrote:
Photo of my n/a ca intake. Uses a unifilter offroad foam sock inside the 4 inch. http://www.redlinegti.com/images/forum. ... /page3.jpg
http://www.redlinegti.com/images/forum. ... /page4.jpg
You can see between the grille and top rad support all blocked off , together with in front of
exhaust headers.


Id be pretty happy with anything 1/2 as nice as your setup. Magazine article is a testimony to all your hard work. well done.

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Eastern creek 1.54.10, Wakefield 1.12.60 Bathurst 3.05


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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Wed Dec 11, 2013 6:49 am 
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Tassie_mk1 wrote:
That's an awesome Dyno result! :shock: =D>


I was hoping for 115hp ATW. At the end of the day it is an 21 extra HP.

The power curve looks good. Just got to see this result on the track now.

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Eastern creek 1.54.10, Wakefield 1.12.60 Bathurst 3.05


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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Wed Dec 11, 2013 2:04 pm 
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racer5 wrote:
I was hoping for 115hp ATW. At the end of the day it is an 21 extra HP.


Without head work or more compression you will struggle to get above that.

I have BD14's head work and 12:1 comp and just made 120hp ATW. New ECU, intake setup and bigger cams, will see what mine comes up like.

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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Wed Dec 11, 2013 8:15 pm 
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moylee19 wrote:
racer5 wrote:
I was hoping for 115hp ATW. At the end of the day it is an 21 extra HP.


Without head work or more compression you will struggle to get above that.

I have BD14's head work and 12:1 comp and just made 120hp ATW. New ECU, intake setup and bigger cams, will see what mine comes up like.



Agree 100% just a lot of wishful thinking on my part.

It's given me some motivation now to get serious about power now. Ie stop dreaming and start acting.

Was going to play around a bit with NA, I'm going to do some research now on a turbo setup.

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Eastern creek 1.54.10, Wakefield 1.12.60 Bathurst 3.05


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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Sun Dec 29, 2013 6:35 pm 
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I would be looking at the tune looks like a 100 year old heart rate on life support


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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Fri Jan 31, 2014 10:44 pm 
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1600GTI wrote:
You will gain more torque than hp with the quads.
You notice a massive amount of torque down low.
Filter sock are very minimal restriction. I wouldn't chance having no filter.


My experience with filter socks is. Brand used = uni filter.

Lap time socks on = 1.55.75 AFR= 0.7

Lap time socks off - air box on = 1.54.11 AFR= 0.9

Car was like the brakes were going on with socks on. The logged air fuel ratio was rising to .7 as revs increased hence air flow was being restricted.

Car with socks off was completely different, pulled hard right through rev range. Air fuel ratio was consistent around .9 right through the rev range.

After sharing my experience with other track guys, many had similar stories and the 1st words out of their mouths was "they are crap".

Might be time to check or experiment with an air box.

Here is my dodgy air box. Air comes in from windscreen side.


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Retired the gti after 12000 track kms of fangin around.
Eastern creek 1.54.10, Wakefield 1.12.60 Bathurst 3.05
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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Fri Jan 31, 2014 11:32 pm 
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Hi,

I would hazard a guess that you are now drawing air from the base of the windscreen which would be a low pressure area if I'm not mistaken. Combined with your 'dodgy' (beg to differ) air filter with its straight vanes that induce a more laminar flow to the trumpets you have inadvertently stumbled upon an almost optimum setup for your engine. One whole second improvement on a lap time isn't peanuts!

Congratulations.

Cheers,

Drew

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 Post subject: Re: Quad Throttle Bodies with clearance for Brake Booster
PostPosted: Fri Jan 31, 2014 11:48 pm 
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DrelvisGTi wrote:
Hi,

I would hazard a guess that you are now drawing air from the base of the windscreen which would be a low pressure area if I'm not mistaken. Combined with your 'crap' (beg to differ) air filter with its straight vanes that induce a more laminar flow to the trumpets you have inadvertently stumbled upon an almost optimum setup for your engine. One whole second improvement on a lap time isn't peanuts!

Congratulations.

Cheers,

Drew


Drew love your post.

Your design analysis is very clever.

Yes air is coming in from base of windscreen.

I agree laminar flow created through the filter over the top of the trumpets would create idea flow into the trumpets and would probably improve performance.

I think the congrats go to you for pointing out the theory behind how my new air box might be by accident a good design.

I've learnt something new. thanks

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Eastern creek 1.54.10, Wakefield 1.12.60 Bathurst 3.05


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