Hereīs the Blitz SC for AT or M transmission. Blitz has no spec or info on the kit on their site, but I seem to remember the number ~50hp. For me, thatīs 50 expensive hp... Iīd rather go for a TC today.
(Hopefully this aint no repost)

 

Is this kit actually out yet? I saw an ad in a magazine that said "coming soon in 2005" or something like that.

 

Itīs on Blitz website inkl price and everything... but no furher info.
www.blitz.co.uk

 

I think you mean http://www.blitz-uk.co.uk/

 

No avail date as of yet, they have delayed the release of the charger for the 8 for over a year now due to one reason or another. Not holding my breath for early 05.

 

That is one damn tiny roots supercharger. Don't plan on raising the boost on that thing.

 

Yeah, thats pretty damn small. A 50hp gain? And its like what? $7k? No thanks.

 

they use the same picture for all their kits, even the twin supercharger lexus 430 kit.
They list the 8 kit at 3750 pounds sterling or well over 6000USD. And I agree with RG that looks like a eaton 62 which isn't going to boost this engine by much.

Now you have to give credit if they are supplying a $1250 electronics package. Man I sure hope someone can do better then that real soon for my kit. That little add on kills the sales price and they get all the profit. Electronics don't cost **** to produce. They have research but so does everyone else.

 

U.S pricing never correlates to UK pricing so that is not really reflective of what we should be paying. Take the car itself for example. The 8 lists base for 20k in pounds which is around $37k US. Not exactly what I paid for mine.

 

wow...that's a lot of money if you can only take it to that level and no futher bu tat least you can' tactually find kits out for the 8 now:D but dang..teh greddy kit is a whole lot less money adn it's supposed to give you 60whp not 50 for the price of teh blitz you could get the greddy and have it installed. ah who am i kidding i ca't afford either lol

 

Dammit soon as i see these kits in the flesh and a bit of a history i will want!!!

Greddy would be nice as prefer a turbo over a super!

 

Hmm---what are the benefits that you guys see of a turbo over a super--modibility? I know turbos respond more to mods. I've owned both turbocharged (93 RX7) and supercharged (Millenia S) and while those two cars are apples and oranges--I never saw a difference in the power delivery. The RX7s twin setup reduced lag it was still there--while the Millenia S has a linear power delivery. Of coures there is hundreds of pounds of weight difference and about 70HP difference between my two though.

 

I see benefit in whichever comes to market first. Until then it is all speculation on vaporware.

 

One of the major drawbacks to an SC (of any type) is that it is locked into the engine rpm, and so it's efficiency band is rather narrow. In this case, the standard Renesis engine with it's large rpm range exagerates that limitation, so a turbo would offer a broader power band.

For example, check out the dyno results of an S2000 with a centrifugal SC. The SC actually hurts performance in lower rpms, has only modest increases in the middle rpm band, and doesn't really "kick in" until the upper rpms. While this is acceptable in a road course race track, or during "canyon carving", where you will always have the car in the upper rpm bands anyway, this is perfectly acceptable. But for around town driving, this will actually make the "gutless" feel of the engine at low rpms even worse. It depends on what you're looking for, but it can be very disappointing to spend all that money for "peak" power, and actually have worse performance around town. While one might not have "turbo lag", they will have "rpm lag", which can be just as frustrating, and is something that you have to work around just as much as turbo lag.

Meanwhile, a turbo can "cover" that rpm range better. It is still affected by the greater rpm range (for example, a turbo will have to pump about twice as much volume of air at 8k rpm, than at 4k rpm, to maintain the same boost level, so one will need to size accordingly), and there will still be some trade-offs in response vs. peak power, but not quite as much as with an SC.

But at the same time, the lower rpm limit of the auto-Renesis might make it more feasible for a roots-type SC, which while it has some drawbacks, is still quite effective in the 7k rpm limited Miata. And the lower rpm boost that the roots type gives will make up for some of the lack of low end grunt of the Renesis.

Anyway, I would choose turbo vs. centrifugal SC vs. roots SC vs. other upgrades on what I wanted out of the car, and for my money. While there are cases where one of the SCs would be fine, a turbo seems to be a better fit for the RX8 in the majority of cases, including peak HP and broad power band.

---jps

 

ahh i can sense rotarygod is gonna chime in on this one. For the differences there have already been a whole lot of posts comparing the two different types of fi and even a lot of talk abou the different types of turbo setups and kinds of superchragers. i prfer to read what rotarygod, richard paul, charles h hill, mazdamaniac, and Hymee (can' tremember the others off the top of my head sorry guys) have to say as they are very knowledgeable singularly..but together they are an outstanding source of performance info. i'd do some searches you'd learn a whole lot in one afternoon:D

 

No one ever mentions the benefits of weight or placement.

Having seen the Greddy in person and the Blitz in enough pictures, the Blitz looks like it would take half the time to install (and remove) while the Greddy would place the turbo and weight of the kit down low near the engine which is good for weight but might take a bit more work for a diy. Just a small sidenote from someone who likes to do their own work.

 

I could write several pages on how that's not necessarily true. I could also write several pages on how a turbo also fits in a relatively narrow rpm range.

 

And I could write the sidebars.

 

and all i could do is agree b/c they know a hellova lot more than i do:p

 

Basically I would write it in several thousand words and get overly complex and then Richard would come along and sum the last 2 hours of my life spent typing into about 3 sentences.

 

LOL i love it when that happens....now i just skip to his post and sum it up....rotarygod you make my eyes hurt...adn my brain turn to mush..hehe i wouldn't have it any other way

 

So we all know that you love the Racing Beat intake RG, but what turbo or sc really catches your eye?

I am going to wait until mid next year before I consider the FI option.

By that time there will probably be 3 systems on the market all with consumer feedback on how they work.

I'll buy the best one at that time in June.

 

It really depends on your goals. I am really only truly against centrifugal superchargers such as Sunflower Mazda's. The ones I am most anxious for are Richard's Axial flow unit and Hymee's twin screw supercharger. I'm not a fan of the Blitz system. Turbos are pretty generic. Any system from STS, SSR, or PTP should also be nice. Depends what type of power you want and what type of driving you do the most.

 

But it's such a CUTE lil roots supercharger! :D

 

I think this blitz system is a weak attempt... way overpriced for what it allegedly delivers. Not to mention it just gives me a bad feeling. Gut feeling can be very useful!

RP's is much more intriguing.