ROTARYSHACK 13B BLOW-THROUGH dyno results/video
 

people ask "how much power will it make" and i never had an answer for them, until now!
the car is a 83 mazda rx7
engine is a 91 j-spec turbo 2 motor
transmission is stock
stock turbo@10psi
intake is a Weber 45mm DCOE
non intercooled
ignition is a locked distributor, 2 MSD 6 AL's , 2 blaster coils, MSD plug wires, NGK B10EV spark plugs
lightened flywheel(steel) RPS turbo clutch
the car runs on 91 pump gas
see the video at www.rotaryshack.com/movies,, silver car

see the dynosheet at www.rotaryshack.com/dynosheets silver car

impressive.

the video is at www.Rotaryshack.com/movies
silver car

this setup is very reliable and is the least inexpensive way to make your Mazda turbocharged with good results.if the car has good traction it should have no problems getting 12 second timeslips! I have alot of local guys with this setup that are pleased with the results

ok, I am a little confused. Why does the dyno sheet say halltech - 25 lb boost?

Because you are looking at the wrong sheet.

Did you happen to have a wideband hooked up to it? I'd be interested in seeing the A/F ratios for that thing with no intercooler.

You're looking at the wrong one. Although, I can't see the other one, it's too light.

here is a better graph, im not too good with the computer , stuff, sorry

You're looking at the wrong dyno sheet.

the air fuel mixture was 11.5 all the way through the pull, look at the smooth hp graph...

we made 3 pulls back to back , the last one made the most power!

680, why no intercooler?

intercoolers are not manditory, just an option..the car runs great without it, remember , its a budget turbo kit!
plus since there is no intercooler, or intercooler piping there is NO TURBO LAG AT ALL!! on low boost turbo systems intercoolers are not as important as on a high boost application

How much does the "budget turbo kit" cost?

Hi Robert. Thanks for posting this and I'm a happy camper! We already phoned to do a few more stuff (non-motor wise) since I have so little time to do anything because of my work. I'm glad that the wheels looks good on that car too. Once I get more internet savvy, I'll try to post more on this board. I'll be down in that area in the next few weeks as I see on my books.

Andrew Leung

:p:

cost and avalablity of the low cost turbo kit??

for GOD sakes MAN MORE Details !!! lol

randy

I would like to know what carb bonnet you are using

Turbo Plenum (bonnet)
 

we make our own and they are available to the public..
common sizes are always in stock

http://www.rotaryshack.com/pages/plenum.html

Im drooling over them :).

~T.J.

680, i see you gadda 12at for sale..is that the lowest price you can seel that beast @? im very interested

Stepdaddy

"Im drooling over them ."

They do look nice don't they? Seems like a timeless design for that model car.

Andrew Leung

nice car 680, keep up the good work.

Yeah. Where did you get them, and what size are they?

~T.J.

15x7 Panasports with 205 Khumos

I got them thru the parts trader

That's pretty good numbers. Stock turbo, 10psi. I take it the engine porting and internals are all stock as well?

You could easily bump that number up with addition of an intercooler. I would only run without an intercooler with less than 8psi of boost. Plus adding one is that much more reliable. I'm sure you already know this (well, i KNOW you know this!) but I see you are talking just a "bolt on budget package" type of thing.

Good work and good numbers, keep it up!

ps - You know what would make that carb setup really sweet? See my username ;)

Good job Robert. I knew you would make Andrew happy.;)

Hey, does that mean it's time for a...:grouphug: