I did a search on how much horse power a non turbo S5 can handle and didn't find much. My question is how much horse power can the non turbo S5 engine and tranny take before stuff starts breaking? I heard a rumor that it was around 500 hp before the apex seals broke into tinny pieces.

 

most people will recommend making your power on a turbo engine. apex seals on a used engine (depending on mileage) will be less likely to hold. i believe the seals are the same between engines, but i'm not sure.
i would never expect the non-turbo tranny to hold 500hp.

 

as soon as you hit 500hp in an N/A S5 let me know about it!

 

NO, no, no, no!!!

I don't think anyone really knows a concrete number on how much the N/A tranny can take. But probably not much over 220hp or so. The N/A tranny is pretty crappy, so is the Diff and the engine! The turbo engine is way stronger then the N/A engine and can hold about 400hp pretty well... After that, the life span is really shortened.
Who ever told you a N/A engine could hold 500hp should be slapped across the face.

 

u need an electric supercharger to get 500hp

 

i was going benefit of the doubt and assuming turbo or such. he just said engine, not setup. you can get 350 or so n/a, but its kind of normal to see people use turbo engine parts.

 

In what way is ther turbo engine stronger? there the same, cept a few coolent passages and a slightly bigger oil pump to account for the volume of oil flowing to the turbo. The tranny and the diff are differnt though, but i dont think anyone knows exactly how much they hold, but there pretty crappy stock soo,...

plus the higer compression and difernt ports but that has nothing to do with engine integrety.

 

i dont completely know about strength, but there are parts that are stronger (S4 t2 vs S5 t2 for example). i was referring to making power. ports, intake and exhaust are very different. most of all that is above and beyond me.
as for the tranny and diff. pretty crappy stock?? haha, naw. i mean, some FDs run T2 diffs. 87GTR runs stock T2 tranny back drivetrain and has laid down 499.9hp/399 torque. daily driven car (how much he drives it, i dont know, but i've seen him around quite a few times). the stock drivetrain is actually very, very durable. far from crappy.

also, theres a piece of metal on the outer side of the outer coolant o-ring (if i remember right) that is known for cracking on N/A (not sure if year/gen specific) engines.

when i referred to using turbo engines, i wasnt speaking of the durability as much as the design. though i'm rather sure the turbo engines are more durable, but not sure why.
take a conventional piston for example. can you tell me why some platforms are better to be used than others? aside from replacing all typical reciprocating parts, sometimes some vlocks are better structured. i believe, though could be wrong, that the situation is similar for n/a vs turbo engine blocks. and i'd love to see an explanation why.

 

Well I just rebuilt my tranny on my 89 non turbo and I'm looking to just get a basic rebuilt done on my engine. After I'm done with my engine I going to get a new intake manafold from http://www.tweakit.net/shop/product_...roducts_id=117

I think I was able to post the pic of it on here. After I get all that crap outa the way above the exhaust manafold I should have room to add a turbo with no probs. Then I would of course have to upgrade my fuel pump and injectors and install some kind of engine management system on it like a Haltech or something. Ya the reason for my post was to see if I do add all this crap to my new rebuilt engine I'm hoping it will all hold together with out falling apart!

 

How much does your rx7 beast put out?

 

well, if you can afford a rebuild (do it to a turbo block!), a standalone, wiring harness, new sensors, injectors, fuel pump, intercooler and piping, and miscellaneous accessories (etc), than upgrading to a used T2 tranny-back drivetrain shouldnt be too hard.

 

he was just making the point that an N/A (13B) should never have to see 500hp. well, won't see 500hp in a naturally aspirated state.
i'm still sure most builders use T2 parts for their insane N/A motors, but i'm not sure.

 

To get that much power out of a N/A (look up JudgeIto) you have to use periphial port engines. FAR from streetable. Run ITBs and S5 high compression rotors. Tune the HELL out of it, add LOADS of fuel, straight pipe exaust, and you have a 5-600HP N/A. These engines have balanced rotors, e-shafts, better bearings, pins, etc etc etc. Far from stock motors though... but I think they all use 4-port TII plates. The rotors are lightened, and these engines go 14K and up... and don't make a lick of power until atleast what... 7K?

Yeah, it can be (and is) being done... but don't look for it going to your grocery store like you could see a 400HP TII.

-Jon.

(P.S. Sorry if my facts are off... but you get the general idea)