Icemark

Must have been in my file of saved pictures and what not to do

actually your write up was much better than Carl Davis's was. He did a lot of mistakes (but apparently used alot of your pictures as well).

Zer0 Cylinder

are you saying 10-12 hp gains on your website from just putting in the s5 uim + vdi, without porting???

wozzoom

Definitely what not to do! LOL!

Anyway, Carl was the inspiration for my original project. I met him at MADS in VA in '99. Once I saw how it was done on his car, I started my install and write-up.

The write-up on Carl's site was my original version 1.0. I gave him permission to post it when I took my original website offline. The one that is posted now on my current website is version 2.0. The new write-up covers the fitment details much better.

wozzoom

That's the deal. Yes.

Individual results may vary, but there have been before and after dyno runs (with no other changes other than the VDI intake) showing a max of 12 RWHP gained.

Zer0 Cylinder

ive got the parts sitting in the floor to do this.....but i dont think im capable.

wozzoom

I think we're getting a little off topic in Icemarks post... If you want advice and the install details, PM me and I'll help you as much as I can. It's not that hard.

flubyux2

great job mark... and here i thought you were just an electronics nerd!

way to go hitting that magical 200HP target, expecially w/ that stock, bath-tub exhaust manifold AND a catalytic converter. that is just flat out phenominal.


i KNOW you could a handfull of HP by fiddling w/ your AF and timing... you just need an ITC and an SAFC... get rid of that chip ya got there.

from what i see, there really isnt anything else you can do to that setup... maybe the lightweight pullies would help, and putting some Royal Purple gear oil in the diff.

you know, if you can find a compentant machine shop, you can get your stock TB bored out a few MM and he can also machine you oversized TB plates. My buddy Joey had our friend Chris bore out the stock supra TB 5mm and he also fabricated a new throttle plate. so i KNOW it can be done. im just referring to the secondaries of course... keep the primary plate stock size for the crisp throttle response.

Bukwild

thats great work making a NA drop 170 rwhp. But I have the same 88 vert now with the t2 swap and I will never go back to na form. And as for being a little lighter with a NA motor and drive train, the turbo will more than make up for that.

NZConvertible

I really doubt you'd see a worthwhile improvement on an NA, since the TB is already huge for the output of the engine. Swapping the FD UIM and TB (which has 50mm secondary throttles instead of the FC's 45mm ones) onto an FC Turbo has been proven to add only ~5% more power on very powerful engines, and that percentage gain would be even less on a car with only 200hp. I don't think there's enough material in the FC TB to increase their size by a significant amount anyway.

flubyux2

yes, minimal gains for the work required... id say that falls under a similar category like $500 for intake manifold porting on an NA and only have 170hp at the wheels to show for it..

since i have the resources and connections... and i feel even the smallest hp gains are still gains; i would do it.... if the meat between the TB bores wasnt so thin.

SpeedRacer2386

I need info on how to install an air intake on a 2nd gen. Can you help?

86project

sorry, flame me if you want, did not have time to read the whole 6 pages of posts, all i want to know is are you wanting to sell the jspec????? please, please,please!!!!

Zer0 Cylinder

hmmmmm in another post a guy said that if you had a large/aggresive SP, then the s4 setup would work better than the s5....anyone care to shed some light on this?

Icemark

The Jspec is going into a 10thAE that I am rebuilding

Icemark

Yes, that is true as the S4 manifolds (especially the LIM) are larger than the stock S5 versions and tend to flow better at most RPMs.

In my case the porting on the engine is very mild as well as I am using a S4 LIM. I need pass emissions testing every two years.

But more than that, a couple of people have already dyno proved that the complete S5 intake on a S4 motor will have no HP increase except for above 6000 RPM, and actually lower torque and HP at mid range.

That is the big advantage to the mixed S4 LIM port matched to the S5 middle and upper intakes. It still retains the low/mid end torque and has the advantage of the increased upper end performance.

flubyux2

so my S5 is slow? is that what you are saying???? i have no potential?? i should get an S4 lower???

Icemark

No, not saying anything like that... the S5 intake is fine for what it is, but in stock form it is a limited design.

You would only get additional HP using a S4 LIM if you had done some porting to your motor, but of course at the loss of the 7k to 8k RPM that the S5 non turbo engine has.

Remember as motors go, the S5 really does not make much more useable power than the S4, it just has gains at the upper end because of the increased air flow of the S5 intake and RPM.

The S4 intake maxs out flow at 6500, while the S5 intake maxs out closer to 7800.

88IntegraLS

I might as well bump this one up because it is valuable for people looking for legit NA mods.

Regarding adding a header: on my streetported S4 engine, adding the RB collected "streetable" header caused a .04 g increase in acceleration in the first three gears, and my gtech quarter mile time changed from 15.5@95 to 15.0@98. This is on a ~2400 lb FC with stock main cat (very old) and stock cat back, but some mild intake porting and a cold air intake.

Point being, if you have a ported rotary, adding a header might give you some power like it did to me. I actually didn't really notice it without the gtech, because the engine feels the same. Same low end torque (actually more), same nice midrange, same six port boost when they come on, and the power doesn't fall off as bad above 7k rpm now. Actually I can shift at almost 8k before the G readings get anywhere near those seen in the next higher gear.

jhammons01

Bumped for Midnight 7

Mr. Gadget

Since this is back and living I wanted to ask a question about the exhaust. Did you reinstall the K brace or are you running without it. I understand that there is fit issues with the Bonez and a vert notably the k brace.