bryant

does anyone know if this does anything besides flow better & if its worth 50.00 bucks?

kristopher_d

Better flow means better horse power. I've heard nothing but rave reviews. Is the hp worht $50 to you. If not, don't get 'em. If so, get 'em.

bigfish13515

i know that pinneapple racing sells these for the 2nd gen non turbo models and the guy that i keep talking to claims that they will add 10hp. Even if they add only 5, it is worth 50 bucks, and i know that i am going to have them put in on my motor that he is building.

Rotormax_4169

the other day i was talking to my rotary mechanic about the sleeves from pineapple and he told me that out of all the engines that he rebuilds, he has never put the sleeves back on. his justification: when the engine needs air, it takes it. seems to be another way to look at it. he said that he has never seen any advers effects?? what do you think about that?

kristopher_d

If I sent an engine with sleaves to a mechanic and received it back without them, I wouldn't care if they had made a difference or not, I'd still kick his rear end to last thursday. Even if I didn't notice 'till my next rebuild, I'd still be pissed. A reputable business person will always return all custom equipment. Also, if his justification were true, no one would ever port and polish their intake manifolds, or use forced induction for that matter.

bryant

thank you but a lot of work for 5 hp

bryant

here goes nothing!

SureShot

Loose ~50 lbs and go just as fast?

KNONFS

iTrader: (14)

Loose 300lbs and forget about all mods!!

KNONFS

iTrader: (14)

Actually, without the sleeves you will loose torque at low rpm and gain nothing at higher rpms (no hp or tq). Pineapple sleeves contours more to the shape the airflow should take when entering the chamber................or something along those lines!

wozzoom

I'll agree with KNONFS on this one. If you remove the sleeves, you'll loose more than you gain. If you look at the end housings where the 6-port sleeves go, you'll find that the ports are countersunk to accept the sleeves. The coutersink is almost 3/16" of an inch! ASCII Drawing:

-------------------
Air going in ---> I <- bottom of port
_____ __I

So if you follow the airflow into the port, it would hit the bottom of the port and the get sucked into the engine. This is not a desirable effect! Its better to have a smooth contor to PUSH the air into the engine.

I have the modified sleeves in my engine now and I love them. Worth every penny. I can actually feel when my 6-ports open up. It feels the same as the VDI opening up on a series 5 NA, except that its at 3,800 RPM.

wozzoom

Crap. ASCII Drawings don't work... It took all the spaces out... Oh well, you get the point.

bryant

ya but did you do the work your self?

wozzoom

I do all my work. Nobody touches my car...

godspeed

Hmmmmm.
I know the contor on the pinnapple sleeves are good for flow, but how much total area is lost when the're installed?? It isn't a complete mandral bend, more like a compression bend where you would lose some of the total area volume for "better flow design" Is the flow affected enough to counter act the loss in port size?

wpgrexx

do you have to be doing a rebuild to be able to put the sleeves in or can they be put in with the engine in the car? I hope this isn't a stupid question.

KNONFS

iTrader: (14)

You can just change them without toring apart the engine, HOEVER you do have to remove the whole intake manifold in order to get access to the sleeves.

Thaniel

Amen to that.

wpgrexx

so when i am porting my intake manifold would probably be the best time to do this?

SpeedRacer

yes, that would be a great time to do this. If you've never removed your intake system down to the block, expect it to take about a day to take it apart and put it back together. If you've done it MANY times, like myself, expect it to take 2 hours.

The Pineapple sleeves don't effect port size at all. They do change the overall volume of the sleeve a tad, and remove maybe 2-3mm of overall lenghth of the opening in the sleeve, but the overall velocity increase of air getting into your engine far outweighs this.

Here, I took this from Pineapples site, hope Rob doesn't mind.
http://24.150.232.157/rx-7/pineapple_sleeves.jpg

silverrotor

iTrader: (1)

How are your 6 ports regulated? Electronically? Or back pressured considering you are running a Series V motor Into a Series IV FC?

Sniper_X

So let me tell everyone the result of keeping the stock setup..
.(I think that the PR sleeves are good, but you should know the following)

Every "power boost" that i have heard about with modified sleeves has been seen on my cleaning of the stock setup.

The problem with these reports i see is, that people never clean their intakes except until the install new PR sleeves, or remove their old ones.

The simple act of removing and cleaning the system is enough to qualify for nearly any of the boosts i see here and elsewhere.

I can feel the ports open quite strongly each time I accellerate.

I have a spotless stock intake on all my cars.

I would like to dyno a car with a spotless intake using the stock and PR sleeves to get a real idea of thier advantage.

But everyone should remember this..

When you install a new part, make sure that the only thing your changing about the engine is that part.

if you repalce a part AND clean, you are doing TWO things to the engine.

Whos to say what caused what?

If the intake is clean when you get in there, and the sleeves move very loosely in the cylinders, then you will get a real idea of what the new PR sleeves will do when you replace the sleeves.

Otherwise your sense of power and fuel savings is merely due to cleaning the system.

I know that that im just stated the last sentence as a fact, but thats because it is.

I re-gasket, acid bath and re seal everything on an intake rebuild.

The result is a slick moving 6port system, very noticable boost at high RPM and a measured and verified 20% gas milage saving if you drive properly using the sleeves.

Every time, no mods.

Ive done it 6 times now. all on 1990+ cars.

Node

iTrader: (1)

very good post sniper_x.

godspeed

Thats a vey good point sniperX. It would really be interesting to see the difference between clean ports vs. PR Sleeves.

RX7BEAR

I agree I noticed the difference when I did my intake too!!!! I cleaned every part replaced the spider hoses for the oil injectors that were shot and all the gaskets . Made a big difference. Then I got the pineapple sleeves and they made another big difference so to me all the effort only made it better.