redboykid

would pineapple sleeves make a differ on a stock engine and would you notice any power differ if any

BDoty311

You probably wont feel any difference, but there should be some. Its physics, the easier a time the air has getting into the engine, the more efficient the engine becomes, so it doesnt have to do as much work to suck the air in.

mothership

iTrader: (1)

I can sell you a set if you want. $35 a pair, includes shipping.

mothership

Castrol86GXL

what exatcly are they and where do they go???

mothership

iTrader: (1)

Read about them.


http://pineappleracing.com/Prod-pr6pi.html


mothership

tweaked

iTrader: (4)

I am bad with names but whomever I talked to at Pinapple said that on a completly stock motor, they ahve seen consistant gains of 8 HP. That is not a bad gain for $50.

fc3skid

Mothership... I will be rebuilding in a couple months. Will you still be selling them for $35 a pair?

steviep_

do u have to put them in whem your rebuilding or can u do it at any time????

vectorminds

no, you dont need to do it when you are rebuilding... but you will have to take the intake manifold off, as they sit inside the engine side housings behind the lower intake manifold

bingoboy

pull off the IM and they pop right out...oh and btw...a reputable forum member has had problems of them. pineapple racing is supposedly going to get info on that problem up on their site. it was concluded however that when the sleeves are put in that a product like loctite green should be used.

SonicRaT

iTrader: (6)

that would be this thread
https://www.rx7club.com/forum/showth...ight=pineapple

mothership

iTrader: (1)

"Mothership... I will be rebuilding in a couple months. Will you still be selling them for $35 a pair?"


I have three pair posted for sale on the board so I can't promise anything.

mothership

jpd3253

I've been reading posts on these Pineapple Racing sleeves for over a year and I'm confused by one issue. If there is an 8 HP gain with the sleeves, why didn't Mazda do it? Point, S4 to S5 Mazda changes major engine components to gain 14 HP, but overlooks the sleeves? What am I missing?

John P.
'88 Drop Top

Thaniel

I thought that too. Mazda spends $$ and weight on VDI and not an extra dime on the 6-port sleeves. I decided to pass on the pinneaple sleeves when cleaning my 6-port sleeves.

BDoty311

Who knows why they didnt? Why didnt Mazda make a cone filter standard, or better spark plugs/wires?

8 hp seems too high, but I bet that there is a measurable gain from adding them. And they are only $50!!

rotarygod

iTrader: (1)

Mazda seems to have remedied the problem on the Renesis. While it does still utilize rotating sleeves, they are now actuated from the sides rather than from airstream obtrusive rods, and the sleeves are radiused at the ends. This is how they should have designed it 20 years ago!

Relisys190

iTrader: (4)

we all learn from our mistakes... Including Mazda

Just think of what mazda will have in a couple of years... Rotary engine wise.. as long as sales stay up, and funding stays high the rotary engine could very well be the next motor for the masses

-Markus

"I keep telling you guys... The rotary engine is back!"

P.S... As for the pinapple sleeves.. you'll have better Hp gain by just removing the sleeves all together and blocking off the acctuator ports

Yeah the pinapple sleeves are "cute" by design.. but you'll get better results by just removing the system all together.

Zach McAfee

What? You mean you get better flow if you leave the pineapple sleeves in and remove the rods. You get much better flow with a radiused turn than a 90* turn.

Doggyollie

I won't be convinced that pineapple sleeves do anything until I see a before and after dyno chart. Yes, they look cute, but do they really work?

1987RX7guy

iTrader: (3)

You loose low end tourqe by removing the sleeves all together. You don't gain anything from taking them out. Its hard enough to drive in traffic already don't make it worse.

Zach McAfee

Yes they do. I've seen airflow #'s from the S-AFC increase big time. Why wouldn't they? It's simple fluid dynamics. Less drag based on the shape, less resistance to flow, increased flow into the chamber.

I think its a great product, despite the problems they have coming loose. That being said I don't have them myself.

Doggyollie

I agree that the shape would be conducive of increased flow and less drag. I am just sceptical until I see some flow numbers. Since you have seen these numbers could you scan them and post them? If not could you direct me to where I can view them?

pinkin

COme loose! are you serious. that is scary.

Zach McAfee

This is a quote from pd day:
And here is a graph: https://www.rx7club.com/forum/attach...postid=1101867

There are a couple threads about the insert coming loose and falling into the engine making a big mess.
https://www.rx7club.com/forum/showth...ight=pineapple

MURX

green loctite.