Rotay engine swap???

[SHO411]

Oh yeah, and the weight distribution is gonna be really tight. Remember they put an SR20 in the 350Z for better weight, weight distribution means alot if you are a pro or trying to go into really intense racing.

[LaYzIeNoY]

would the steering column and some be able to fit properly??

i would think the driveshaft would need to be modified

if you do get it to work go to shows and win some prizes LoL

and unless its your daily driving car i wouldnt deal with all the extras lik radio, a/c, etc.

[thegladhatter]

Originally Posted by SHO411

Oh yeah, and the weight distribution is gonna be really tight. Remember they put an SR20 in the 350Z for better weight, weight distribution means alot if you are a pro or trying to go into really intense racing.

Good point. I wish people would recognize this more. The SR is an animal for the weight. So many Americans want to jump on the RB bandwagon with an RB20 instead of an SR. The SR is SO much smaller weight-wise, and displacement is virtually the same.

My son is doing an RB swap (RB20 out...RB26DETT in) currently and after working with so many SRs the RBs seem so HUGE. The SRs are like toys in comparison, but thr SR20DET makes so much more sense than an RB20DET.

The wankel isn't as gigantic as and RB though is it?

[SHO411]

The wankle engines are very small, I saw one, they are about as long as two cyl, they are usually tons lighter than 4-strokes cuz they got very little reciprocating mass and most of the valve trin is gone.

[johnnyboy5]

it's a freakin 1.3L, geos have that kinda of engine size!! But cool thing is they put a lot of power, if u know a lot about those engines, they seem like a very good and simple engine. Dont have to worry about valves or pistons going bad or knocking cuz they dont have pistons, their rotors. weird thing is that it doesnt put a lot of torque.

[Tougeman]

yeah, but u need to take care of them(rotarys) or they will burn up on u...few have seen 200k+ miles most only see 80-100k

[TatII]

honestly, chassis wise, your goin to step down from a RX-7. the RX-7 weights 2800lbs. pretty light. a S13 weights 2600lbs. so thats a 200lbs difference. however its not as wide. also your degrading from a double wish bone suspension to a mac pherson strut. also the chassis is alot more flexiable. so to make it as stiff as a RX-7 you would need bracing which will bring it closer to the original weight of the RX-7. also by putting in larger brakes will also bring the weight closer to the RX-7.

now considering all that. the chassis of the FD is soo much more superior to the S13. even the S14 and S15 handles notically better. but that will totally negate the weight difference, and still degrading the front suspension.

so what is the point? why put a superior engine in a inferior chassis that hardly weights less in the end?

[Toksin]

Originally Posted by thegladhatter

My son is doing an RB swap (RB20 out...RB26DETT in)

RB26 Laurel. Yummy!

[thegladhatter]

Originally Posted by Toksin

RB26 Laurel. Yummy!

Finally got the registration done today. It is gonna be pretty cool. Pics coming soon.

[musicsurfman]

The Superiority Of The Rb20 Over The Sr20 Lies In The Extra 2 Cylinders.... This Has Been Gone Over And Over Again And A 70lbs Weight Difference Is Not Even Noteable. Thats Really A Intake And Exhaust Manifold Swap.

As For The Rx-7 Chassis Comparison..... Why Would You Need To Brace The Car To Act Like A Rx7? Thats Stupid You Would Want The S-chassis To Handle Like A S-chassis. Under Hard Driving Conditions I Actually Prefer The S-chassis Plantend Feeling As Compared To The Rx7s Tail Happy Hard Cornering. I've Driven The Cars In Question (s13/4, Fc/d).... Fd Is By Far Superior But Its Development Had Greater Funding And Its Price Range Was Almost Double That Of The 240sx In The Same Modle Year.

Rotaries Are Very Reliable.... Anything Said Other Wise Is Internet Myths And Down Right Fear Of Superiority. The Rotary Engine Itself Is Very Light And Compact Its All The Crap That You Put On Top Of It Thats Adds Up And Looks Like A Freaking Jungle Of Hoses.

[musicsurfman]

Why Does Everyone Assume That When You Swap Engines You Need All The Chassis Bracing Of The Previous Car?

Hell My 280z Case In Point Would Be A Perfect Example Of Why Your Intellegence Is Lacking. The 74 Camaro Had A Hard Frame With Quad Roof Crossbeams And Rear Trunk Supports.... My 280z Is A Uni-body With Strut Tower Bars. The Engine From That Camaro Was Put In The 280z And The Power Was Doubled And I Have No Problems With Chassis Flex And Handling Abilities Have Actually Increased.

[thegladhatter]

Originally Posted by musicsurfman

The Superiority Of The Rb20 Over The Sr20 Lies In The Extra 2 Cylinders.... This Has Been Gone Over And Over Again And A 70lbs Weight Difference Is Not Even Noteable...

2 extra cylinders? Same freaking displacement. The number of cylinders is meaningless. The length of the engine places a completely Different setup for center of gravity over the front axle. It rides higher and takes up MUCH more space. If one is to do an RB swap....don't screw around with and RB20...what a waste of space and time....go RB25 or 6...

[musicsurfman]

2 Cylinders Doesn't Matter?

Ok Why Wouldn't F1 Race Teams Just Put A Ka24de In The Car Rather Than Build A 8 Cylinder 2.4l? Number Of Cylinders Has Alot To Do With Power. The Rb20 Is Very Potent And Has Just As Much Potential If Not More Than The Rb25.

With A Rb20 And A Rb26dett Valvetrain (which Is Possible It Only Takes Custom Bearings) The Rb20 Can Rev Out To Well Over 10k Rpm. Match That With The Proper Cam, Intake Setup, And Turbo And You Have A Very Potent Race Engine.

Just Let Me Pose This To You I've Had 2 Rb20dets, 2 Rb25dets, And 1 Rb25de.... I Settled With The Rb20det, Now Why Would I Do That If It Was Worthless? Nope Its Because I Realised More Power, More Revs, And Lower Costs.

As For Weight Distribution.... There Was A Thread On Nico That Someone Weighed Their Car With A Rb25det And A Stock Car And The Weight Distribution Was Still The Same.... The Weight Difference Is Mainly In The Tranny Which Sits In The Center Of The Car.

And Cylinder 2 Sits Over The Front Centerline.... Thats Less Over Hanging Weight Than A Ka.

[TatII]

i was comparing a FD to a S13. in this case there is no comparison. my arguement is that the S13's chassis is very weak and very flexible stock. as compared to a stock FD chassis, the S13 chassis is trash. so it would defeat the purpose of swaping a engine in a weak flexable chassis with inferior suspension that hardly weights less. that was my argument. your defense was swapping in a 350 into a 280Z. well the difference in weight is pretty big comparing a old F body to a old Z chassis, so the weight difference would make up for it.

but all i'm sayin is that the S chassis is very flexable and weak stock wise. so why swap in a rotary from a FD into a S13? you honestly think strut bars will make up the difference in torsion ridgidity of a chassis? maybe from both ends, but it won't prevent it bending down the middle. also your main goal is for handling right? then those 2 factors definitly will cause inferior handling. cheap front suspension with very narrow track, and by putting even less weight over the strut suspension, the car is more prone to understeer compared to a FD. also i as i will mention again, with the chassis bending, the suspension isn't even doing all the work, and with the chassis flexing your alignment angle is goin to be varied slightly depending on load and bumps on the road. which again will effect handling.

so why? there is no handling or weight advantages from doin this swap.

if your talkin about a FC. then alright maybe thats different because the FC got this weird multilink trailing arm set up in the rear. but with a FD. no way. and about the slightly tail happy handling biase of a FD can easily be changed with a slightly harder setup in the front.

however if your talkin about cost, then yes you can get a S chassis for much cheaper then you can get a FD. so in the end it all comes down to the mighty dollar.

[musicsurfman]

Thats Not Entirely True... A Camaro Rs Like The One I Got My Motor From Weighs 3250.... My Car Weighs Stock 2830.

Ok Here Is Another Thing.... Rb Swaps. Your Taking A Motor From A Car With Far Superior Suspensions And Chassis Rigidty And Throwing It Into A Weaker Car With Great Results. A Rotarty Doesn't Produce Near Enough Torque To Cause Chassis Bending In Stock Form.... With A Sr20 And 13b Being Pretty Similar In Power Output With The Sr Having More Torque Your Arguement Is Negated By Fact.