Jeff20B

iTrader: (13)

Who here likes Jay-Tech manifolds? Are they good? Worth the money?

Looks like I'll need one if I put a Holley on an FD engine. Maybe eventually a throttle body. But for now a boost prepped Holley.

Talk to me.

ErnieT

iTrader: (2)

Some of the fastest rotaries in the world are using them with great success so I'd say yes.

Jeff20B

iTrader: (13)

Awesome, thanks! Anyone else?

silverfdturbo6port

iTrader: (26)

They are as good as it gets for optimal flow and their products are great quality

Jeff20B

iTrader: (13)

Thanks man! Sounds like a solid piece of equipment.

I've got a question about their carb (plenum) hats. Like this one:

This is the one that fits a carb, it looks like. Just curious how much hood clearance I'll have. Anyone ever used these in a 1st gen?

Jeff20B

iTrader: (13)

This is the other carb hat I was looking at. Spectre
Air Intake Plenum-Single 4" Inlet-Polished Cast Aluminum - Plenums - Air Intake Components - Catalog


Similar price, but not similar quality. Thoughts?

wickedrx2

The best carb hats are from csu or extreme velocity. (Ev)
Im running the csu on my blowthru
Julio

KNONFS

iTrader: (14)

I have one, and havent had any issues with it. There are also other options out there, like the extreme rotaries that Roan distributes in the US. I would love to get one from Roan, soooooo How soon are you looking into buying a jay tech manifold? lol

864angel112

iTrader: (7)

They have a good product, its worth the money in my opinion.

Jeff20B

iTrader: (13)

Thanks KNONFS. I sent you a PM but I like what I see from xtreme rotaries. Decisions decisions...

Thanks angel. Any other opinions? I know literally nothing about 4 bbl manifolds for FD engines. This thread has been a great education.

KNONFS

iTrader: (14)

Sorry, wasnt aware that you didnt know other options, here's another one:

J.W. Performance Mazda Rotary Intakes 97002 - SummitRacing.com

Jeff20B

iTrader: (13)

Oh cool thanks! Wow that's like half price. But is it half the quality?

KNONFS

iTrader: (14)

Nah. Had one on my S5 engine. They basically copied the original jay tech manifold. The main difference is that the JW is wider, meaning there will be less available space between the intake manidolf and the strut tower. For a turbo application, this could be CRITICAL (ask me how I know)

The carb/tb flange on the JW is THICK, at least 1/8 thicker than the one on the jay tech.

silverfdturbo6port

iTrader: (26)

Im sure the quality is fine especially being that summit is carrying it.
It will work no different than any other.

Jeff20B

iTrader: (13)

Thanks KNONFS and silverfdturbo6port! I actually kinda like the thought of the flange being thicker. I also believe the wider shape will be ok in an FB with an aftermarket turbo. Plus, the fact that it appears shorter than the really super tall looking jaytech is ideal as I don't know how much hood clearance I'll need. Finally, I'll be using a carb, so the somewhat different runner lengths of the JW should work out ok. I also probably don't require the center long bolt of the extreme rotaries manifold as I'm not looking to boost so much that I need water injection or e85 or whatever. Just a simple blow through that makes enough power for me, not dyno queens.

I'll start out with my RB Holley 600 for break in purposes along with a long primary exhaust. Then when I get tired of the power of an NA, I'll go blow through with the boost prepped Holley. Just gotta get an FD 4150 intake manifold first.

Any other intake manifolds I should know about? Keep them coming guys!

Jeff20B

iTrader: (13)

I have just one question about the JW manifold. Does it have fully separate runners?

just startn

iTrader: (33)

I had a questions at one point about the JW intake. I HIGHLY suggest you talk to someone that uses it or has delt with a handful of them. RacingBeat is another option. PM'

C. Ludwig

iTrader: (27)

The JW and Pro Jay manifolds don't have the center bolt hole. The RX Parts manifold does. I've never used any of them but know from threads in the past that guys have discussed the need or lack thereof of the center bolt. Also, one of them, want to say the JW, was said to need a lot of port matching. If you do a search you'll find the threads I'm sure.

KNONFS

iTrader: (14)

They all have separate runners.

There are no other manifolds that I am aware of, so those are your options. C.Ludwig posted a picture of E&J drag car, and they have a tubular style manifold. I had heard rumors couple of years ago, where E&J were going to make their own manifold, but never heard anything else.

I had the JW on the S5T engine along with a 750cfm TB, and there was no need for port matching. I cant comment on the jay tech and its TB, since I got the manifold already ported (bought it used).

sleeper7

Have to JW intake on my REW 1st gen. Well worth the money to me. About having to port match the manifold to the runner, motor is ported so i had to port match the manifold. I thought this was a for sure thing to do with any manifold and ported motor.
About the missing middle bolt, Dont have a issue with it up to 35/38psi on a S480. The manifold is so think I can't see it flexing under boost. I use only one layer of the metal gasket with some RTV ultra and when the manifold is removed, there is no signs of leakage.
If space is limited don't get this one. It does stick out allot further then the stock REW manifold. But for me at half the price it was a no brainer.

sleeper7

Mazda RX7 4 Port Intake Manifol 93 95 FD3S RX7 4150 Square Bore | eBay

Shipping cost is really high!

ArmyOfOne

iTrader: (12)

Yup, that's the one. That thing is solid, I use one as well.

Jeff20B

iTrader: (13)

Thanks for all the onfo about the JW. I went ahead and ordered one from Summit.

My motor isn't ported yet. Will I need to port match the manifold if I leave the runners in the irons stock?

sleeper7, I ordered a new metal gasket. Do I need to take it apart to use only one layer like you? Or can I use it as is?

ArmyOfOne, did you use S4 NA rotors?

sleeper7

I got mine from Summit also. JW wanted 40$ more then Summit.
About the gasket, I used one layer because it was a old gasket and felt the one layer would do a better job. If new I would have tried it as is. I hate how the metal layered gasket flattens out after use.

Jeff20B

iTrader: (13)

Glad summit can get us a discount.