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 Post subject: Re: Our little cultus racer
PostPosted: Tue Feb 05, 2019 8:04 am 
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Location: NZ
yeah...no turbos....then we will break the dog box...driveshafts, cv's....need better cooling, etc etc....nope.

so we will slow it down....We are putting a dial on the car to have selectable power levels...which my tuner said can be done on the fly....with an electronic throttle we can select our power level simply by limiting throttle opening...then at least we can select the power that most suits our intended min lap time and drive it like we stole it....no fun in "driving down"...will help save the motor....

the other option is to thrash it in IB class and be left at the back of the field at the end....no thanks. 8-[


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 Post subject: Re: Our little cultus racer
PostPosted: Tue Feb 05, 2019 5:56 pm 
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walling off the front of the car...ducting the oil cooler. making the new fuel rail...


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 Post subject: Re: Our little cultus racer
PostPosted: Wed Feb 06, 2019 3:04 pm 
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What is the idea behind walling off the front of the car??

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 Post subject: Re: Our little cultus racer
PostPosted: Wed Feb 06, 2019 5:59 pm 
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Location: Londoninium
Directing the inevitable air flow through where you want it, radiators, aero, etc to increase their efficiency. That's what the original Suzuki radiator support plate was for.
GTP


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 Post subject: Re: Our little cultus racer
PostPosted: Wed Feb 06, 2019 6:01 pm 
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Location: NZ
much the same as the new swift I have here....the 93 one....it has a panel in the front of the car....the idea is that the air cannot go past the radiator and cooler straight into the engine bay to back pressure the radiator etc....air takes the path of least resistance and wide open gaps allow the air to simply bypass the coolers easily....lots of race cars have ducted radiators and coolers. Blake suggested it....his mechanic did it to his car....and Ivan knows what he's doing. So...i'm after more effective cooling....this is one of the ideas towards it. plus an 82 degree thermostat....evans waterless coolant....bonnet louvres...larger 3 core radiator.....whallah!....then we drive it slower anyway..... :roll: so it probably needs nothing done.....lol.


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 Post subject: Re: Our little cultus racer
PostPosted: Wed Feb 06, 2019 6:02 pm 
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what GTP just said!.....while i was typing an overly long answer....


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 Post subject: Re: Our little cultus racer
PostPosted: Thu Feb 07, 2019 2:04 pm 
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Location: NZ
Pornographic imagery...consider young people before looking at graphic images.


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 Post subject: Re: Our little cultus racer
PostPosted: Thu Feb 07, 2019 2:07 pm 
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Location: Trinidad
Waw, that's going to be a nice jump in compression! What ratio are they?


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 Post subject: Re: Our little cultus racer
PostPosted: Thu Feb 07, 2019 5:02 pm 
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Location: NZ
12.7:1. JE coated pistons.
all at the engine builders now. BMW m50 main studs, datsun 1200 head studs. They want to use the adjustable cam pulleys and clock them in properly. hope it doesn't cost too much.... :oops:

here is our latest addition to aid in cooling....rightly or wrongly I have a few hoods so its worth a try. front bumper not on properly....much twiddling to get it fitted with the ducting still....front splitter to go on....there are rules to having louvres...either fine mesh...or a deflector plate....or foam covering the outlets....maybe it a "cant get stuff coming out of the hood onto the windscreen thing"? but im going to put ali plates under the hood to strengthen it and direct any water away from the motor.


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 Post subject: Re: Our little cultus racer
PostPosted: Sat Feb 09, 2019 12:24 am 
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Location: Chicago
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Last edited by ruhu1975 on Sun Feb 10, 2019 12:25 am, edited 2 times in total.

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 Post subject: Re: Our little cultus racer
PostPosted: Sat Feb 09, 2019 12:34 am 
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Last edited by ruhu1975 on Sun Feb 10, 2019 12:23 am, edited 1 time in total.

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 Post subject: Re: Our little cultus racer
PostPosted: Sat Feb 09, 2019 10:24 am 
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Location: NZ
Hi can you delete both of these posts I answered on the other post you put on another thread of mine cheers


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 Post subject: Re: Our little cultus racer
PostPosted: Sun Feb 10, 2019 9:04 am 
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thanks for that.


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 Post subject: Re: Our little cultus racer
PostPosted: Thu Feb 14, 2019 1:44 pm 
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swift12 wrote:
much the same as the new swift I have here....the 93 one....it has a panel in the front of the car....the idea is that the air cannot go past the radiator and cooler straight into the engine bay to back pressure the radiator etc....air takes the path of least resistance and wide open gaps allow the air to simply bypass the coolers easily....lots of race cars have ducted radiators and coolers. Blake suggested it....his mechanic did it to his car....and Ivan knows what he's doing. So...i'm after more effective cooling....this is one of the ideas towards it. plus an 82 degree thermostat....evans waterless coolant....bonnet louvres...larger 3 core radiator.....whallah!....then we drive it slower anyway..... :roll: so it probably needs nothing done.....lol.


gtpswift wrote:
Directing the inevitable air flow through where you want it, radiators, aero, etc to increase their efficiency. That's what the original Suzuki radiator support plate was for.
GTP


Originally I think I was trying to point out that it looks like there is little airflow to the radiator as it is. The bumper deflects a large amount, the headlight is solid and could be mesh which would help. Though I cannot see that area well enough.
My original thought was to put a bellmouth around the radiator creating a positive pressure zone where the air can only go through the rad and ducting air from the bumper/headlight to the rad.

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 Post subject: Re: Our little cultus racer
PostPosted: Fri Feb 15, 2019 4:10 am 
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Location: NZ
Cheers Michael.

I have researched it quite a bit. Certainly the bumper causes a lot of air to just go into that area and does not create a positive pressure at the radiator like it should.

I was going to open up the frontal area to the radiator but it appears that is not the answer. The answer is to have a smooth inlet around 33 to 40% the size of the core of the radiator with a diffuser of a max of 15 degrees and a seal right through to the radiator....this increases the airflow in the inlet and as it slows when hitting the radiator and diffusing before the radiator it increases pressure....that’s the theory and what I’m trying to achieve. Same with the oil cooler.
Oh gotta go....plane leaving.


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 Post subject: Re: Our little cultus racer
PostPosted: Fri Feb 15, 2019 6:57 am 
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Location: Bunya QLD 4055
You need to have lower pressure behind the radiator to draw the higher pressure through. If front and rear are at same pressure there is no air movement.

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If "X" is an Unknown quantity, and a Spurt is a drip under pressure, then an "EXPERT" is an "Unknown Drip Under Pressure".
Why dont they just call it "Womenapause" instead.


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 Post subject: Re: Our little cultus racer
PostPosted: Fri Feb 15, 2019 4:55 pm 
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thanks picture. yes I agree....hence the bonnet louvres and the wall to stop pressure entering other than through the coolers. hopefully the louvres will suck air from the engine bay...reducing pressure and allowing more through the coolers.

almost finish the exhaust...just have to solidly mount the rear of the headers to the engine mount...and wrap the headers....then job done.


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 Post subject: Re: Our little cultus racer
PostPosted: Sat Feb 16, 2019 1:22 pm 
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Location: NZ
rear header mount guys...what do you have? im not using the mount on the motor at the front...the original cast mount...the tubes will shrink and grow somewhat so do i solid mount at the rear of the collector or put a rubber mount there to allow flex?


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 Post subject: Re: Our little cultus racer
PostPosted: Sat Feb 16, 2019 6:18 pm 
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Strange to see an O2 bung on the opposite side, but hey if it works.

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If "X" is an Unknown quantity, and a Spurt is a drip under pressure, then an "EXPERT" is an "Unknown Drip Under Pressure".
Why dont they just call it "Womenapause" instead.


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 Post subject: Re: Our little cultus racer
PostPosted: Sat Feb 16, 2019 6:36 pm 
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Location: NZ
yeah...two sensor bungs...there is my O2 bung for the belts and braces O2 gauge....the little blue light that races up and down you can see in the vids...it shows us that its running full blue under load which is correct...it should show green but the calibration is such that the best AFR is full blue...ie...about 12 to 1.

the other side is for the lambda controller the ECU will monitor....(innovate) and Chris will take my one out for his tuning initially. The innovate one does not stick into the pipe...its a different type of sensor.

I am making a rear mount....should it be rubber for flexibility...or solid?


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