Dmitry

just some thoughts.

What do you think how hard will be to install rotary engine from RX7 or RX8 and fit it with Tib's tranny.

those engines are small, so probably there would be no problems with space.

brian01tib

I wouldnt arent the rotary engines heavy? I dont like the high revving engines in order to get any power.

The reason I was worried about the weight because look in the RX7 in a recent SCC mag that did the comparison thing. THe person swapped a v8 for the rotary and he said it was a diff of 60 lbs or something like that.

Dmitry

Rotary engines are small and lighter. There are only 6 moving parts (in usual engines there are 40-60).

Here is how it works:



Rotary engine don't afraid of righ RPM, cause it turns in the same direction (see on the pic), so 2000-5000 RPM is normal. And red line is about 9000 RPM.

wink900

Whoa only been on for a couple days and already my area of expertise.

Anything is possible with enough money. the 13 B rotary engine is incredibly light and probly wouldnt throw off the rd's weight distribution. 1.3 liter puting out 146 - 160 depending on the series of engine and 186- 200 for the 13bt turbo engine. the problem is the rx-7 is RWD getting it to mate up with our tranny will be difficult.

The v8 swaps the people put into rx-7's are alot heavier and throw off the vehicle weight dist which is fine in the straight line but an rx-7 is alot of fun in the curves and I wouldnt want to jeopardise the vehicle great handling.

MAXXTIB

The tiburon tranny will not work with a rotary engine due to its gear ratio's, rotary engines rev up to 9-10,000 rpm and the tranny has to have very high gear ratios since they don't make any power until 5,000 rpm, if you hook one up to a tibby tranny it will be a slug.

hamhead

Your reading about LS1 swaps, and LS1s are rather light.

supry

Maxx is right, the wankel has such high rpms it would be difficult to get a transmission to work well with it. And if you were to use the RX7 trans you would have to convert to RWD and if so, then I would just go AWD with an Evo7 swap. Just my nickels worth though.

Dmitry

I did some research:

Tibs gear ratios:
1. 3.462
2. 1.950
3. 1.393
4. 1.031
5. 0.825
Final 3.650

Mazda RX8 gear ratios:
1. 3.76
2. 2.27
3. 1.65
4. 1.19
5. 1.00
6. 0.84
Final 4.44


And I found a solution - you need to buy a new final gear about 4.6, and gear ratios will be almost the same as RX8.
here is a link for FGR on KSPEC:


http://www.kspec.com/list.php?ac_id=85&ai_id=906

faithofadragon

and for the price of installing the wankel engine, tuning, new fgr in our crappy transmissions you can boost your stock motor and hey guess what!!! youll have more than 200 hp

wink900

Not to mention the rx-7 has very bad gas mileage for those of you interested in a semi daily driver. On my T-II I think i got 24 MPG 90% on the free way usually i got 20 ish