evilbada1

unless the twin set up is sequential, there is really no need for twin turbo imo,
it will cost more than single turbo set up, but if you're going to use two small turbos let's say that flow 15 pounds of air/min, why not just use a single that can flow 30 pounds of air/min? I think twin turbo is just a waste of money.

Rotary Rasp

iTrader: (2)

Wouldn't there be less lag with twin turbos because they are smaller?

Fanman

Yes, but you will run into the same problem that people complain about the Greddy already. With a small turbo you get low/midrange, but it runs out of air on the high end. Also, more parts, more costs, more maintenance). Unless you have a sequential setup similar to the stock RX7's (small turbo for quick spool up, larger one kicks in after that for good top end) but that introduced more complexity & maintenance). Tradeoff to all setups.

evilbada1

modern BB turbos have very quick spool, so i don't see a point in twin

PoLaK

iTrader: (1)

I'll be Supercharged by the end of summer in-addition have the interceptor tunning my AFR, but be fore then I'll be playing around wtih X-EMS and NA tunning.

14.5 not 14.3 whoever the orignal guy who said it was, I mearly said that everyone of my runs was an impovement and that if I had only enough gas as was needed to get me down the track (i had half a tank) and if I took out all the usless traveling garbage I had in the trunk then I coulda ran better.
Thread is stickied in comp and racing.

DARKMAZ8

meh....... FI will just ruin your engine. Unless you don't mind rebuilding it every 60,000k, I wouldn't bother.

PoLaK

iTrader: (1)

Plenty of TurboII's made it to 100k-130k + 3rd Gens saw the higer side of 80k where are you pulling this 60,000k number from?

StealthFox

polak the typical FD does not make it to the higher side of 80k i'd say more realisticly high 60's or 70k. the Turbo II typically can run a bit over 120k well taken care of.

also the FI rx8 should last quite a bit longer than the TII because the RENESIS is a much more durable motor, i predict the 13B-MSP being even more of a longer lasting engine than the n/a 12a engine which can last over 200k, and surely the 13b which lasts over 160k easy

StealthFox

haha, sure have fun sitting in the dust every time any car over a stock stripped down civic with a fartcan pulls up to you

PoLaK

iTrader: (1)

Sorry i was just going by what someone had told me a while ago on 3rd gens, either way 60k is still way off, especially running a mild map for everyday and a race map for when you want too just wish the X-EMS had and easy way to switch them

StealthFox

no problem man, there's no need for a sorry, everybody is learning something new, i respect you a lot and look up to what you have accomplished(being on top of rx8 performance here in america) at your young age(and your crazy rx-8 drag racing skills).
The main deal with the FD is that they are often found subjected(driven around in second gear all day with an assload of carbon built up) and the silcone hosing about to break from brittleness and create an overheating disaster or highly modified with a large turbo, neither of which contributes to a long engine life. Theoretically it is possible to full rebuild of the 13b-rew and do a complete overhaul of the car, go through full reliability modifications(alum ast/rad, all new silicon vac hoses, boost control/guage etc etc) and you can get over 100. that is very very unlikely though. the engine is very finicky and it is an absoulte must to have good tuning, reliability mods, and sufficient cooling(lots of work is needed here)

And to tell you the truth, having low/high boost, or mild/agressive map EMS changes won't increase your engine mileage as much as you'd think. proper engine care, tuning, and cooling are the key for the car. It's definately a fun car to keep around to mess with because they can get crazy fast for very cheap(unlike the rx-8 where we can squeeze 25hp n/a with bolt ons tops and need to spend lots of money on FI that yields not the greatest gains) but then again the RX-8 is a very different car from the FD and built for a much different purpose.

And the day a turbo system integrates or uses the x-ems will be a holy day for me. im sort of traditional where i like rotaries with turbos.

Polak what supercharger application are you planning? was it petitt?

PoLaK

iTrader: (1)

It'll be petitt, unless richard wants to finish up ASAP and gimme one pro bono out of his nostalgia for when he was a young lad like me

Red Devil

My 87 TII had its first engine replaced at ~150K. Just based on that, if done right with a proper set up and proper care, I would think the renesis will last 100K.

DARKMAZ8

You can't compare the tii to the renesis. The renesis was designed to be n/a. The added heat will eventually catch up to the high compression renesis. I'm not saying that it won't be a fun car but just keep an $8000 engine fund just in case.

DARKMAZ8

Depends on the type of driver you are. If you're a drag racer than go ahead an turbo it but don't expect the tranny to last very long.

I personally have a base 8 and will continue weight reduction untill I am under 2800lbs. Then I will get the motor ported and tuned along with suspension mods. My goal is an N/A 8 that gets high 13's and can do some serious harm on a road coarse.

I'm actually pretty happy with my 8. If I want to win stoplight races against civics then I would of kept my old 94 mx-3 2.5l klze turbo.

PoLaK

iTrader: (1)

since when does an engine rebuild cost 8,000, I could buy nearly 3 new renesis' for that.....

Doing any type of streetport or bridgeport and tunning it to achieve lets say 280hp I would say would be just as detrimental to the life of the engine, the intake ports in the motor are already huge making them bigger is possible but to achieve 280hp would require overlap would be extreme IMHO.

DARKMAZ8

I am just aiming for the 250(220whp) that we should of got to begin with. Nothing as aggressive as you speak. I'm talking about something milder and of course a tunable ecu. An n/a motor will not wear like a FI motor because it won't be sucking as much air at the same rate. Plus it won't be running the same exhaust temps. If you're into track racing then the turbo will hurt u in the hot temp days. plus the added weight won't help handling either.

I was thinking canadian $$$$. as most fd's cost that w/o turbos, I figure the renesis will be the same. Either way, I'd still keep that rebuild cost in an rx trust fund.

rkostolni

Actually a new Renesis is only about $2500. For the added amount of fun of having a turbo, which is quite a bit, I'll deal with a $2500 expense as long as my engine makes it to at least 60k miles. Which I think it should. A lot of performance experts claim that a proper turbo setup should only shorten the life of an engine by 10%.

DARKMAZ8

wow.....$2500 is cheap

StealthFox

you know what all the power to you, what im trying to say is(well actually i don't believe in import drag racing, and dislike the sport in general) is that the rx8 needs a bit more power to stay competitive, and a lot of people do want to be able to at least keep up. in my opinion the car's power gets the job done but my opinion doesn't mean jack **** on a straightaway, not saying thats all that matters because my car is superior to other cars in the class is ways other than raw torque. in the twisties its another story and im sure you know how capable the car is keeping up/beating cars with much more power. i didn't know you were planning on doing extensive modification, actually what you're doing is most natural for the renesis engine, because it is a naturally aspirated 6 port which generally isnt a boost application. not to say that the forced induction application isnt as good, its just that technology needs a little bit of time and we need more R&D. keep in mind the RENESIS is essentially the same as the 13b, and with not very much work will be just as(and more likely much stronger than) good a candidate for boosting applications as the older 13b engines. as for porting, you still have a long journey ahead, guitarjunkie has done a 1/3 bp and gotten good results and even improved gas mileage. if you're looking into porting in the near future i would strongy reccomend a 1/3bp so you don't get any low end loss that this car shouldn't be losing.

Richard Paul

iTrader: (5)

:D :D :D :D :D :D :D :D :D