It really depends on so many things but the average is like SPOautos said.....20%. From what we've seen on our cars it's actually less but that comes down to how you have it set up and the parts you use.

 

whats the mod .?

 

Im guessing you weld / fill up the area around the compressor inlet. If you dont know what the anti surge housing is, do a search there are a ton of pics. MY best guess is that you fill it in?

 

jasrx: it's turning the compressor inlet into a big velocity stack. It's a real pain in the *** and takes alot of time but it's well worth it in the end. The downside is you lose that really cool whistle that the anit surge housings make.

 

We're not married but she's my girlfriend

 

Ahhh, your running the larger GT42 wheel. They have two wheels the 94mm and the 102mm. I dont know anyone running the 102mm wheel on a 13b so I've not seen anything from it in person. The 94mm wheel is what most people are using. It flows about 85ish lbs/min which works out to about 650-680rwhp, this is about what a standard T76 runs as well. The 102 wheel fows right at 95lbs/min which works out to about 725-750rwhp.

If you max that turbo out and run the right tq converter you'll probably nail down some high 8's provided everything else is in order and you can get it to stick.

BTW - For anyone that doesnt know those comp wheel sizes are exducer and if you want to compare them to the older Garretts the 94mm wheel flows a hair less than a T76 and the 102 wheel flows a hair more.

Stephen

 

Here's what the anti surge delete looks like.....the only pic i could find right now

 

who did the manual rack for you, I want to do the same with my car...

 

SPOautos: i guess that little bit of info helps huh....i was kinda wondering about the lower #'s you were posting. We were actually going to try and run the GT47 that we just put into the Supra but it wouldn't even fit. It's just waaaayyyy too big! It dwarfs the GT42.

 

Kaifd3s: we did it....it's a Flaming River pinto manual rack. It's sooooo light! It turns very easy especially with the skinnies on the front.

 

that's a sweet set up..guess I wil have ot go with the Marval gear mod...thanx..

Car is very clean..wish you hit your goal on the car

 

what advantages does the anti-surge delete have over using the anti-surge map width enhancement??

 

i think i saw that the anti-surge housings slow down the spool by a couple hundred RPM.

not sure about them, but nifty. think i read that about the t04z on some poopra forum

 

silvr94r2, thats very very badass

i saw you mention your intake manifold same as the one supras run. which one is it? the VW?

 

What rims are those? And are they 16's... or were you able to fit 15s up front, if so how?

 

oops, seems i read something wrong or got confused



"Quote:
Originally Posted by ghostrx7
Nice man, anti surge delete should help with spool no?"


"Yeah it's helped by about 500 rpm on the Supra's and it also makes more power."

 

Yeah we're going to basically use the same design except scaled down. Dana did a bunch of flowbench testing to get the VW manifold to where it is and this one will be no different. The VW intake mani is said to be the best one out on the market by quite a few different companies. Titan runs it on their cars,SP,Ryan Woon, Marko, etc..... I'm sure we'll be able to achieve the same results with the Rx7 mani.....or at least i'm really really hoping we do. Combined with the Groundzero lower and 90mm Accufab throttlebody should make a high flowing combo.

On the surge delete.....it helps in everyway across the board. We're doing a bunch right now for PSCA guys. They saw our car at the last meet and asked about it. We did a couple for them to show how they worked and they reported across the board gains with better spool. The car we did 1st was a 57 Chevy with twin GT47's. It was insane!!

 

They're Bogart D-10 15's and they fit because of the Aerospace brake kit we made. The front kit was not that bad but the rear is a nightmare. It took alot of work but it's worth it in weight savings. The total weight savings from front and rear was about 70lbs. If that doesn't seem like much then how about 30lbs per corner combined with the wheel/tire combo.

 

I'm not really sure what the map width enhancement is. Can you elaborate?

 

thats aweosme, you have any close up pics of the wheel/brake setups? did you do entirely new hubs?

And I saw a flowtest comparison of the VW vs the Veilside and the VW is awesome as far as the flow numbers go.

Man, you're really getting me all excited. I just started getting into drag prepped street cars and was looking at automatic supras but a RX-7 of this magnitude is just awesome.
A 20b version would be awesome. But seems as though you have a good enough power plant now.

What suspension are you using? Is it stock RX-7 setup with some hks drag coilovers?
And what about the rearend? Going to see how long before the stock rear brakes or is it a live axle or cobra IRS setup?

It's cool if some of this info is "secret" but I just love to see this on an RX-7. They are a great handling sports car, but theres always alternative uses

 

BEAUTIFUL!! Asbolutely beautiful...every picture you took showed a little surprise if you looked deeper into them. Great work on the setup! Looks like a screamin' fast drag car in show trim!

you into photography also? you're girl is kind-of cute too...

 

ahhhh yeah well here in oz well call that bell mouthing the comp cover

 

Did you make the brake kit? Or can you buy it. I would really like to be able to fit 15's and everyone has told me it can't be done

 

Yeah the VW outflows everyone else by a longshot and it's equal across all the cylinders unlike most of the others.

I'm sure the motor will do just fine.....i'm not going to drive it everyday so it should last long enough to do what it has to.

The suspension is all chromoly with spherical bushings. The coil-over kit is a custom Afco double adjustable setup. Wait until i show pics of that......i said wow and we're the ones who did it. It even suprised me! We made our own upper front A-arms to clear the shocks and did some really trick stuff for the upper rear mounting.

The rear end is stock Rx7 except for the usual....gears,axles, and diff. We are adding braces and will see how it holds up. We've taken all the measurements to see how the Supra rear would fit so that'll be next if the stock doesn't hold.

The car is getting shot for a couple different magazines as soon as it's done. They came down recently to shoot a couple more cars we did and said i'm next. Look for the Lexus SC300 in an upcoming Turbo along with the 1035rwhp Supra that eats Busa's and goes 210+mph (GPS confirmed).

 

It was custom made by us because noone makes one for our cars. We'll be offering it up pretty soon if there is any interest. There's quite a bit of work involved but it'll be worth it for sure. Wait until you see the way it looks....awesome!