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Turbos on a Seven


MichaelD

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Guest Terry
No, it came with the bare ali windshield trim and chrome headlights. Had I been the one to order it from the factory it would have been yellow with the black pack. Originally I intended to paint it yellow before putting it on the road but the blue has grown on me and until it really needs new paint it will remain blue.

 

There are pictures of the whole car in the link in my sig line.

 

Man, I love that colour. The only problem I see is that car is WAY to clean, please don't tell me its a trailer queen :cuss:

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Man, I love that colour. The only problem I see is that car is WAY to clean, please don't tell me its a trailer queen :cuss:

 

It has 12,500 miles on it, about 1,000 of that on the track. It has started to gather some patina. It only rides in the trailer when I have further to travel than liquid oxygen I can carry in the car. I have two small portable tanks that are good for 12 hours combined so for more than a day trip it rides in the trailer with the big LOX tank.

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Vaux turbo here and really pleassed with it as the power dilivery among the rpms,

is really friendly!! which ofcourse has to do with the turbocharger choice,

In my case is a garrett 2876,which is more than enough in addition with a

AVCR to hold the horses :)

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As far as I'm concerned any boost is good boost but both sides, actually three sides, have valid points.

No boost: (+) light, no heat, simple. (-) to get a lot of power from a small CC motor you need to spend a lot of money and then it's mostly delivered at high RPM only.

Supecharger: (+) no exhaust work and less heat issues, power comes on from idle up and is very linear. (-) added weight, drive belts, robs some power to make power, needs room.

Turbocharger: (+) most ultimate high RPM power because less power to run it. more available and can be done for less if you fab your own system and use available "donor" parts. (-) exhaust work, heat issues, room. Power is getting more linear as turbo technology gets better but still has a lack of off idle power and can be lag/peaky even with latest tuning.

So, do what you really deep down want because everyone has their own favorite and it might not turn out to be yours.

I've has a couple of supercharged cars and love the smooth predictable power, never get a surprise. On the other hand I've driven some turbo cars that will rip the tires off the rims when the turbo spins up to waste gate pressures and if that doesn't make you smile, well, you better check because your probably dead.

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Guest Terry

I'm sure that huge Turbo boost in a 7 would put a smile on anyones face, but my question has always been, "is it drivable" As I said in one of my earlier posts our Turbo Hayabusa Race Car developed massive power, but the car was undriveable on the limit. I would agree however and am in favor of a correctly installed Rotrex SS. Linear power at its best.

 

This is what it's like with the Rotrex on it.

 

Edited by Terry
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Guest Terry

For those of you coming on the Grizzle Bear Blat, once we are on the Island either David or I will give those who are interest a blast up th road in it. It's orgasmic.

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We used a Rotrex in 1 of our cars and it is blindingly fast, and incredibly packed engine compartment. It can become a packaging nightmare to fit everything in there to make it work correctly. The biggest isssue is heat build up. Cooling and intercooling. It can work and is very effective and is fast but not as easy as you might first think.

 

I have heard Dick Brink who is a Birkin dealer is building a Rotrex powered Duratec.

 

I know it's not easy to fit the supercharger but I planned and able to do it without much

trouble. The key of easy Rotrex installation was the CNC bracket and by not putting a dry sump.

Notice I still have extra room ? I installed air to air intercooler -- oil cooler for the rotrex supercharger & oil cooler for the Honda s2000 engine.

 

The S2000 engine & Busa engine ideal to put a supercharger instead of turbocharger. The power is linear. Having an anemic torque on both engine also ideal to use a supercharger.

My last engine before the s2000 was the Hayabusa turbo & will not do it again -- way too hot.

 

http://img33.imageshack.us/img33/222/img3304a.jpg

http://img17.imageshack.us/img17/4951/img3303zt.jpg

http://imageshack.us/photo/my-images/811/img3305og.jpg/

Edited by BusaNostra
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Busa is that a Kraftwerks kit? We use a/w intercooler because we had issues with the a/a intercooler blocking airflow to radiator. Your intercooler looks small. How much boost do you run? We are at about 23psi. We also mounted ours where the AC used to mount. I was a little concerned the Kraftwerks wouldn't work with our chassis we have a chassis brace there. The TTS kit looks like it would work on a 7.

All you need now is a sequential tranny to make it really fun.

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Busa is that a Kraftwerks kit? We use a/w intercooler because we had issues with the a/a intercooler blocking airflow to radiator. Your intercooler looks small. How much boost do you run? We are at about 23psi. We also mounted ours where the AC used to mount. I was a little concerned the Kraftwerks wouldn't work with our chassis we have a chassis brace there. The TTS kit looks like it would work on a 7.

All you need now is a sequential tranny to make it really fun.

 

I bought the Rotrex from someone who initially installed it to his BMW, then I bought the Kraftwerk CNC bracket (not the whole kit, I can't use the whole kit). From there, I progressed doing all the fabrications. I didn't spend that much.

 

I'm only running between 12 to 14psi (more than enough for the street use). My intercooler is calculated. You can't put too much or you lose pressure and velocity. I have 3 bar map sensor - adjustable fuel regulator - AEM EMS & 750cc siemens injectors (hi-empedance). I can change the pulley to boost more but there is no need.

 

My radiator somewhat independent from the engine compartment. The heat of the radiator is not blowing to the engine bay. My radiator is build in to the nose and the heat exit at the top of the vent. Check this pic : http://img20.imageshack.us/img20/2817/sevenradiator.jpg

So, I don't have problem putting an air to air intercooler (except I put a air deflector). As a matter of fact, i added two oil cooler (for rotrex & engine)...still a lot of room.

Edited by BusaNostra
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Guest Terry
Terry I like that combination Rotrex/hyabusa?

What size Rotrex are you using? Looks rather quick.

 

My partner is out the country at present, I will get back to you. Every time I drive this beast I am staggered at how docile it is; you can drive around town in 6 gear at 40 mph with no issues what so ever (your Grandma could drive it), in 6th you can just feed in throttle and instantly its off. It's just awesome, I have owned many of the 70s, 80's 90' super cars including recent Exige's and a GT3, and the Hayabusa 7 with the Rotrex SS will out perform all of them up to 160 MPH.

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Guest Terry

 

The guys a drag racer and addicted to HP. I bet this thing is undriveable on the limit on a road course.

 

All drag racers should be deported by noon, their tarmac strips torn up and be sentenced to at least 12 months HP detox before being taken to a proper race track where they can learn the art of driving.

:boxing:

"I hate drag racing" :hurray:

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All drag racers should be deported by noon, their tarmac strips torn up and be sentenced to at least 12 months HP detox before being taken to a proper race track where they can learn the art of driving.

But the drag strip is the front straight on a lot of road courses (e.g. Pacific, Spokane) I'll have to raise the ride height quite a bit if the straight isn't paved......:jester:

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Guest Terry
But the drag strip is the front straight on a lot of road courses (e.g. Pacific, Spokane) I'll have to raise the ride height quite a bit if the straight isn't paved......:jester:

 

Woops, didn't think of that, however that only happnes out here in the colonies; back in Motor Sport central (UK), one might not even talk to drag racers let alone share tarmac with them :smash:

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No, there is a lot of drag racing with sevens in the UK. Santa Pod had "Run what you brung" days fairly often for a while there, and Complete Kit Car and Total Kit Car talked about it regularly.

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Guest Terry
No, there is a lot of drag racing with sevens in the UK. Santa Pod had "Run what you brung" days fairly often for a while there, and Complete Kit Car and Total Kit Car talked about it regularly.

 

What !!!!!

 

I will phone the authorities and have a stop put to it immediately :party:

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