Here's my goal to come up with a 4 injector manifold plus 2 injectors on the block. My two main options are the current Xcessive 4 injector manifold or JW Performance/Pro Jay style 4 port manifold with elbow and throttlebody(s). I'm really having a hard time paying $520 plus modifications to my existing top feed secondary rail, when I can spend the same amount or less and possibly gain some performance. The break down is below. I have full machine shop so rail modifications to me are free (time only), plus I have 200 in summit bucks to spend. Any thoughts on drive ability issues and performance gains I may have by moving to the JW style manifold setup.

$520 Excessive LIM
$? Rail Modification

or

$210 JW Performance Manifold
$110 Edelbrock 3848 Eblow
$ 20 Mustang Throttlebody
$? Fuel Rails (Already have the stock)
$ 25 Injector Bungs
$ 40 90 Eblow for IC piping

 

if you have a machine shop available to you, why don't you go completely custom? Thats what i would do.. and what i am doing..

 

What do you need the extra two injectors for? E85 conversion?

 

Well, I really don't want to spend a lot of time on it as I would like to get it done this season. If I do it myself I will take too long to finish with my other projects. Plus if I did roll my own it may or may not work as well as something already out there.

Yes, I'm running E85 using 4 160 lb injectors currently and would like a little more head room when it comes to injectors and would like some smaller primaries.

 

There is a subtle difference between the JW and the pro jay manifold, and it has to do with space. Make suer your turbo/manifold fits with one of this type of manifolds.

With that said, why don't you go with the proven combo? The manifold, 8 injector TB, and hat?

I had a quick chat with them at the Pan Ams, and his new TB/hat (redesign) looks AWESOME! Check them out:
http://www.pro-jay.com/main.sc;jsess...3.qscstrfrnt03

 

Price. Why would I pay 800-900 on a setup that is very similar to something I can make for 400 without a lot of work.

 

I am sure you can make it work (and no offense to your skills) but I highly doubt that your idea/setup would be as good as the E&J or Pro Jay TB setup. Anyways, that is not here or there, the only advice that I can give you is:

Make sure that your turbo/turbo manifold FITS when using one of this type of intake manifold.

Good luck with your build, I am sure it will come out right

 

Thanks for the advice. Just got off the phone with JW and it sounds like the manifold is almost 5 inches deep compared to approx 3 inches on the stocker so it definitely won't fit my setup. Sounds like I'm going to have to find a used Xcessive or build my own lower....

 

build your own!
make a mani like the E&J with tubing, and bolt up an 8 injector TB, so you have space to grow.

 

Check the pro jay, as it is narrower on the center section (the primary runners), or you can make a custom turbo to manifold spacer. The spacer would be something like this, but the flanges should be off axis...

 

E&J does not make a intake manifold, and something tells me that the OP is trying to keep it on the cheap side; probably why he was going to use a 5.0 TB, and make his own intake to TB adapter.

 

I have a rew flange in 1/2 aluminum already so I went ahead and order some aluminum El weld elbows from a company called Pierce. Great prices on sch 40 alum tube at $7-10 a 90. So I am going to try and recreate the LIM in elbows. We'll see how it goes.

 

Keep us posted!

BTW - For some erason the "spacer" pic didn't came up, so let me try it again...

 

good ****!

 

This was my inexpensive ways of getting 6 injectors. Primary (2) 550cc (for good iddle), secondary (4) 1600.

http://img.photobucket.com/albums/v2...TBManifold.jpg

 

i honestly didnt care for t he 4 port intake until i saw what it can do to a rotary. we make globs of power from a ported motor (adding more air) so just imagine what a 4 port intake can do.

low-medium boost. from what the owner said stock motor on a gt35
http://www.youtube.com/watch?v=8LWfWTE6ibs&NR=1

which is why i went with projay. also beside it being to have more space its lighter as well

 

657rwhp on a GT35 with low to medium boost? I don't think a GT35 would push enough air for 650+rwhp....

 

they actually made slightly over 700 whp on the stock motor with an S475 turbo, not the GT35R. They made just over 500whp w/ the GT35R.

For all out performance, I don't think you can beat the Pro-jay or similar manifold w/ a proper TB/injector setup.

 

/\ k thanks. i was just wondering. a gt35 is a small turbo. Is he on here?

 

It's AnthonyNYC's car. his build thread:
https://www.rx7club.com/single-turbo-rx-7s-23/another-bw-475-project-816447/
And the 709 whp pull:
https://www.rx7club.com/single-turbo-rx-7s-23/new-e85-record-holder-709-9rwhp-32psi-833684/

 

Thats turboR1's car not AnthonyNYC's.

 

Oops sorry, he's right. Duh.

 

lol anthony car is yellow or did you even look at the vid??


btw that car launches hard with that 2 step

 

I've watched it lots, I just mixed up names. you talking about the GT35R launch on the 10.6 run? I didn't think they'd made a pass on the new turbo yet.

 

no im talking about the street vid when he waxed that 11.0 second mustang