Mr. Gadget

i believe this was well written and has a bunch of insite. Here is my decision making factor -

RISK v. REWARD
Concept is great, easy to install, cost is minimal.
Risk - blown engine - possible blown rotors and housings - 2K in new hard parts if opt to go that direction.
Reward - a few ponies
Overall, not a risk I choose to take.

Tofuball

The risk is like, zero, if you install them correctly :O

The way I installed them, I tested it with a small flathead, I couldnt budge the thing.

Plus, with the added protection of the 'ding' in the housing, what in the world else is left to go wrong?

DerangedHermit

If you install them correctly...

Tofuball

Ok, ok, I agree:


"IT NEEDS TO BE INSTALLED CORRECTLY!!!!!! "

Dont expect it to be that great with INCORRECT installs!

Mr. Gadget

Any movement at all over the course of time could work the inserts loose past any "Ding" ALU wears very easy. If your comfortable for the few ponies, enjoy. I chose not to do this mod. Beautiful thing about our world, we ahve a choice!

tri_tam

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/pineapple-racing-6-port-sleeve-install-anyone-interested-163840/

alexdimen

iTrader: (13)

i put a set screw on each one... theyre not going anywhere. i pulled them out after i had used loctite and after 100 miles they were loose. take the time to drill and tap a flush set screw in. they need some kind of mechanical retaining.

bingoboy

send the sleeves to pineapple and have THEM install the shim thingies. that's what my buddies and i all did.

rotariesrule

why are you people buying these rediculous things? they are not worth it and are NOT needed. they ADD an obstruction in the sleeve and REDUCE flow. the fluid will form its own best track into the engine. the first fluid (air/ gas mixture) entering will fill in the area in question and the rest of the fluid will ride on top of it. to visualize this use particles of sand in place of the air/fuel mixture.

Tofuball

Um. No.

Mr. Gadget

I loved this thread last summer . . .

Bob_The_Normal

I ordered them recently, sent my sleeves to them to install..

I was figuring that if they ripped apart my engine after THEY installed them I'd have quite a bit of support for getting a new engine from them... where if I did it myself I'd have nothing.

But from what Kevin is saying maybe they don't have much of a reputation to lose not backing it up anyway... =/

I thought Rob seemed like a very good guy at SS7, he was very smart and common sense approached to things... unfortunate that their business is getting a bad reputation from something they could fix so simply!

And to the guy that thinks these obstruct flow, man... get a brain.. lol.

Why don't you add a few 90* angles to your exhaust pipe, I mean... since all that straight flow is obstructing your exhaust!

--Gary

xb2002

do the sleeves increase performance alot? (can you feel a difference?)

RotaryResurrection

iTrader: (8)

They probably offer 3-5 hp, which is about the difference that is felt between how a car runs during a warm day, and how a car runs during a cool night. It barely registers on the butt dyno.

Tofuball

^ This is how flame wars start. Please stop being so agressive and confrontational before a mod comes and deletes everything. Remember, the intake air is PULSED, and of a rather high velocity. It is not a constaint flow like water. Also, the ports existing structure requires the air to take an immediate 90 degree angle turn. Smoothing out that turn is all the inserts do, they dont 'get in the way.'

This is not ment as an attack, mearly a suggestion: I'm GUESSING that you havent actually seen the port in real life to be able to determine how the thing is actually shaped, and that might be the cause of the argument. It's a pretty small ramp, and the end acts as a spacer because the sleave goes a little past the port.

xb2002: I _felt_ a difference. It wasnt massive, but it was there. And, if it gave me at least 5HP (working with all my other intake porting and exhaust mods) then $10 per an HP is not something I'd be complaining about.

Bob_The_Normal

Hey that's pretty funny chump, considering I just said in my last post that I sent my sleeves in, isn't it?

My engine is currently completely disassembled in my garage downstairs as I type this.

So... where is YOUR engine?

Have YOU ever taken apart a rotary engine in your life?

EDIT: I'd also like to point out that Pineapple HAS dyno'd the results and it IS ~5hp. So before you even TRY to defend your point, realize that you've already been PROVEN WRONG before you even started arguing... which is why you should RESEARCH things before you go making claims just because you stuck your nose in your physics book.

Get over it.

--Gary

rotariesrule

gary,

you don't need to take your engine apart to remove the sleeves you just need to remove the intake manifold. you are such a good mechanic you sent your sleeves to them to do. how brave. don't get mad at me because you wasted your money.

i build and port engines for people after i get home from my 9 to 5 job.

i have built more engines that you have neurons.

Bob_The_Normal

Translation:

"I'm a 'professional' shadetree mechanic."

Thanks, that clarifies a LOT of things.

You're a real good sport about being wrong, more people should be humble like you.

--Gary

rotariesrule

let's see, do you think pineapple might be a little biased on the dyno rating?
is he not trying to sell you something? of coourse he is going to say it works. do you really think he is going to say it doesn't work. and if he said it only made 1-2 hp improvement it would not be worth it, so he said 3-5hp. big deal! not worth the risk.

i have given proof with a college text book on fluid dynamics. you have not given me any proof, except an owner rating his own work.

oh and by-the-way you were a jerk to me first.