I tried for you : the "Sprint Booster"

Useful hints, tips that you think will help other drivers and owners. (No questions)
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Rasputin
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I tried for you : the "Sprint Booster"

Post by Rasputin » Tue Jan 16, 2007 9:39 am

At the Austosport show in B'ham, I met our Greek OBR (the engine management company I work with) dealer, Mikhalis, who introduced me to Nick, a Mazda dealer, and also a RX nutter. He then introduced me to 2 other Greek blokes who designed and manufacture the Sprint Booster. They asked me to test one for the RX-8.


What is it?

The Spritn Booster is a small electronic device no bigger than a connector that plugs between the accelerator and the wiring loom feeding the pedal signal to the PCM.


What does it do?


The Sprint Booster modify the relationship between gas pedal angle and electronic throttle opening angle. It therefore changes the throttle progression and makes it more aggressive. For a small pedal move now corresponds a large movement of the throttle.


Does it really work?

Yes it does! The max performances of the engine do not change, of course. But at part load, teh erpfromance feel is really improved and you have the feeling you drive a much more powerful car thanks to a greater engine response to small pedal inputs.


Who it it for?

It's for all those who find the throttle response a bit sluggish and who prefer a more sporty, aggressive RX-8. I would not advise it to people who sits all week in London traffic. That said, the Sprint Booster takes less than 30 sec to fit or take out. So one can envisage to fit it for weekends only.


More info?

Ici : http://www.sprintbooster.gr/

Fabrice
Owner of a 2004 SP RX-8 from new. PCM recalibrated and revs to 9000 RPM.
3 Renesis opened and diagnosed so far.

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Rasputin
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Post by Rasputin » Tue Jan 16, 2007 10:47 am

I was not aware of the adaptive strategy on the RX-8's ETB. If there is one, it will only give a limited range in the change of progression (a few percent).
Here it is much more aggressive. You feel it immediately and strongly.
But as I said, I would not want to be stuck in traffic in London or on the M25 with this stuff on.

I fitted the one that was given to me for testing on the car park in Dover, waiting for my Ferry. So mostly motorway driving with the cruise on. Then I tested it on country raods in my area. That's where it is most suitable as it makes the car more responsive. I haven't really tried it in city driving conditions, but I can figure it out.
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3 Renesis opened and diagnosed so far.

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Post by KennyNI » Tue Jan 16, 2007 1:08 pm

I find at lower speeds, when blipping throttle to change down gears to match engine revs, speed etc, a lot of throttle travel is needed. Generally not braking at the same time

But at higher speeds, while braking, with heel and toe down change (sorry, no double declutching, I'm trying), the throttle response is much quicker and less travle is needed.

That's the impression I get anyway. Often thought I would like throttle response a smidgeon quicker at low speeds, but would not want to effect at higher speeds.

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Post by Rasputin » Tue Jan 16, 2007 1:38 pm

t would need to be tested on a track to clearly find out how it works in racing conditions.
I will ask if I can keep it for more testing, on other's people cars. Someone technically enclined so he can give a useful feedback.

F

PS: this is a general remark : please feel all free to correct my English, whether it is spelling or grammar.
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3 Renesis opened and diagnosed so far.

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Post by dirtyleeds » Tue Jan 16, 2007 2:59 pm

Sounds interesting. Let us know your thoughts after the testings completed.

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Post by WinningRX8Blue » Thu Jan 25, 2007 7:21 pm

KennyNI wrote:(sorry, no double declutching, I'm trying)
what exactly is double declutching, how do u go about doing it and what is the benifit of it? Ive heard it before somewhere and was always interested in finding out about it

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Post by weasley » Thu Jan 25, 2007 8:51 pm

Before this particular old chestnut turns into yet another debate about the pro's and con's of double-clutching, can I recommend a little searching of your own. Take a look at the following...

wisegeek.com (a pretty good start on the subject)
wikipedia (this is actually a pretty thin description and doesn't go into much detail).
Not had a Wankel since 2007.

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Post by dirtyleeds » Thu Jan 25, 2007 10:16 pm

Have a good hunt round the forum too - it's been discussed in depth here quite a few times.

:D
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Post by Rasputin » Fri Jan 26, 2007 8:20 am

I have got some news.

First, for those who find the Sprint Booster to aggressive for urban traffic driving, there is a softer version available. I will try to test it in February.

Also, I can keep the one I have for test purposes. I will give it to another moderator on the French forum to offer it to test at a meeting this weekend.
Then, when I'll get it back, I was wondering if you'd be interested to test it, Druck?

Fabrice
Owner of a 2004 SP RX-8 from new. PCM recalibrated and revs to 9000 RPM.
3 Renesis opened and diagnosed so far.

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Post by rotaryPilot » Fri Jan 26, 2007 11:33 am

I guess that this spint booster has a direct effect on the car's consumption. I guess that is not so economic. It is like you step a lot on the gas petal all the time.

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Post by dirtyleeds » Fri Jan 26, 2007 1:18 pm

If drucks not keen on testing it for you let me know and I'll give it a bash. If enough notice I may even get a track day organised to test it both on and off track and report back.....
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Post by Rasputin » Fri Jan 26, 2007 2:02 pm

^^ Yes no problem. Druck or any other UK OC committee member will be fine.

Fabrice
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3 Renesis opened and diagnosed so far.

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Post by dirtyleeds » Fri Jan 26, 2007 2:33 pm

Woo hoo!!
I knew this job had to have some benefits somewhere along the line!! :D
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Post by Rocketman » Fri Jan 26, 2007 3:16 pm

:shock: Sh1t ! Dirty's gettin a booster to try ! :twisted:

If youre in the vacinity...take the bus ! :lol:
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Post by dirtyleeds » Fri Jan 26, 2007 5:31 pm

Cheeky tw*ts the pair of ya!! :lol:
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Post by Rasputin » Tue Jan 30, 2007 3:06 pm

There was a RX-8 meeting in France last weekend, and a few owners tested the Sprint Booster gave me some feedback, very interesting feedback.

In fact, the Sprint Booster I gave her does not give the smae results on a SP and a HP RX-8. As I mentionned, it is a bit too aggressive on the SP, but it now seems confimed it's good for the HP. For the SP, it's the other, less aggressive version of Sprint Booster that is meant to be fitted.

I'll order one soon to test.

And I should recover "my" HP Sprint Booster next week and send it to DirtyLeeds for testing.

Fabrice
Owner of a 2004 SP RX-8 from new. PCM recalibrated and revs to 9000 RPM.
3 Renesis opened and diagnosed so far.

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Post by Rocketman » Tue Jan 30, 2007 3:28 pm

Fabrice

One thing we havent determined ! How much are they/likley to be ?

Cant see a mention of it on the website or indeed anything about an RX8 version?
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Post by Rasputin » Tue Jan 30, 2007 3:35 pm

I'm not a reseller of this stuff. But...

I contacted them, following the request for a group buy on the French forum.

The all in retail price is 202 Eur (about 144 GBP). I'm waiting for their reply concerning the GB price. I'll keep you posted.
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Post by Rocketman » Tue Jan 30, 2007 3:40 pm

Thanks !

Its quite expensive then. We definatley need a go with one ! :scratch:
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Post by dirtyleeds » Tue Jan 30, 2007 4:50 pm

Rasputin wrote:And I should recover "my" HP Sprint Booster next week and send it to DirtyLeeds for testing
Get in!!! Especially as I've got the High Power version!! :D
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Post by Harrizone » Tue Jan 30, 2007 11:24 pm

^^^^^^^^

Plus Steve is in need of a 'booster', as the karting at Thruxton proved. :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D
Now a distant memory unfortunately.

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Post by dirtyleeds » Wed Jan 31, 2007 8:58 am

Hmmmm :-k

DirtyLeeds - 7th Place
Harrizone - Last Place

Wasn't me that needed the booster!!

Oh, hang on a minute - your on about the kiddie seat aren't ya!! :oops:
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Post by Rasputin » Fri Feb 02, 2007 8:04 pm

We have started a Group Buy on the French forum. If anyone want to join in...

The manufacturer refused to give discounts to end users at a stage where they negociate dealer agreements in Europe. So the price is the price. But he never said anything about shipping. So the only financial advantage here is that shipping is free.

Price is 139 GBP all inclusive, includind shipping to your door (or gate, if you have a big nasty dog...).

You can PM me if you're interested.

Cheers,

Fabrice
Owner of a 2004 SP RX-8 from new. PCM recalibrated and revs to 9000 RPM.
3 Renesis opened and diagnosed so far.

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Post by dirtyleeds » Sat Feb 03, 2007 5:40 pm

I'll try it out first and then if I like it I'll prob be in for a group buy...
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Post by DexRex » Sun Feb 04, 2007 3:33 am

Okay; as one who had modified quite a few of his cars, this sounds great to me, and I am already greatly interested.........

The only fly in the ointment I see is the usual one..........warranty !

Having just bought my brand new PZ, I was quite happy in the fact that not much could really be achieved with the RX8, power-wise, other than strapping a blower on it etc..., and I was looking forward to keeping this one standard, and thus retaining my 3 year warranty.

Now look what you`ve done............. :P :lol:

Fabrice pops up and offers something that sounds excellent, for what isn`t a great outlay at all, and already I`m thinking "mods, warranty, mods, warranty...............?"

I`m sure you get the picture, and I`m sure that this`ll affect the warranty.

Doh......... :(

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