here is the latest 12a turbo project
j-spec 12a turbo motor
45 weber dcoe
rotaryshack carb bonnet and turbo pipe
lightened flywheel, rotaryshack race clutch
85 GSL disk rear end and driveshaft
msd 6a and msd ignition wires, b10ev NGK's
rotaryshack 1 piece intake

this setup has absolutly no turbo lag!! full boost by 1,500 rpm's!!!! the boost is set @ 10 psi with no problems, except for tire spin.... the long intake really increaces low rpm torque and with the lightened flywheel it accelerates lightening fast!! no problems with detonation as the hot turbo air is cooled by the atimized fuel /air mixture as it goes through the carb,, even after several hard passes the intake manifold is still realitivly cold, v/s the hot turbo pipe. still there would be power gains from adding a i/c, but the customer was on a budget..... blow through turbo..... definatly the most bang for the buck!!

 

another view

 

Looks good, although I thought MSD wires were red? Or are they like Accel and you can get them in many colors? What about the distributor? Is it locked? How does it handle boost retard? What about the fuel system? Pump? Boost referenced regulator? Is that an SA? It looks like it with the 3 core rad, the overflow tank, and the lack of the water/oil cooler...

~T.J.

 

MSD makes the wires in red or blue....
they are MSD wires, i assembled them from a universal kit
the distributor is stock , no boost retard and no problems with detonation......

the fuel pump is a MSD EFI pump with a mallory #4309 regulator

the car is a 1980 rx7(you can see the igniter box on the driver strut tower, only on 1980 models)
the radiator is stock, but it's new with 16" electric fan installed
the car has the big oil cooler that came factory

and yes the a/c is working great now, installed the belt

 

Robert the Rotary Rodent Wrangler strikes again!

 

Very nice, excally how I want my future junkyard turbo setup to look. Just one question how is the carb modified for the blow thur app?

thanks,
matt

 

yes the weber carb is modified for turbo..... it's been fully sealed(to prevent gas seapage) the acc. pumps are modified, different idle jets, the carb top is modified to flow more fuel, bigger needle valve, the choke has been removed and blocked and the studs where the velocity stacks mount have been removed and re-tapped for the turbo hat

 

looks nice.....

do you have a pic of a IC weber setup?

"the most bang for the buck......."

how much did he end up spending in parts on its own and how much for the labor

 

Sweet indeed. Reading all these Mod threads really kicks me in the gut since I don't have a job. -_-

 

the only pic i have of a intercooled blow-through setup is ia 88 rx7 .... check my site to see it.... you can easily install one on a first gen , i've done it with ease..... there is much less turbo lag without the i/c (you don't have to fill the i/c and all the piping with air before it gets to the motor!) but you will get more dense air with the i/c = more power , less boost

 

how much does something like this run?? Have been pretty interested for a long time....

 

depends on exactly what parts you want or what your budget is .... p/m me so i can get some info from you...

 

Ive looked at your site a few times and ive liked what ive seen. Although i have a question. Im a boost novice so excuse me if this is a stupid question but, wouldnt the intake flow better if the bonnet wasnt just a square box? or is it concaved on the inside?

 

good question!
when we first started doing blow through systems we tried different shapes... round, square , concaved, small big, putting the inlet in different spots, etc. there was no noticable difference between any of them... the square one turned out to be the strongest and the most cost affective...
thanks on the website

 

Hmmm.... i suppose under that much pressure it wouldnt really make that much diffrence since the air HAS to go somewhere. But it does look strange compaired the the stock 12at bonnet.

 

how much did the set up pictured cost?

 

Indeed, how much did that setup cost?
Im doing a blow-thru this winter on my GXL with the guys from CP Racing (I believe you talked to them earlier today ) so Im just curious as to how much its gonna end up runnin me

 

yes i did talk to chris at CP racing today, i'm sending them some blow through goodies tomorrow (save him some cash over going EFI... after all it's a low budget project!!) the sepup pictured ended up costing $900.00 labor plus parts....if you add up the parts individually it's $$$$$ but i gave the guy a package deal... also i did a GXL conversion already, check my homepage for pics..

 

i have this exact setup except with the rb sp exhaust. What would i need for conversion?

If you were to open my hood this is what you would see, a carbon copy of this motor.

 

Which part were included? The Webber wasnt in the package was it? If so i might need to re-hatch my future plans.

 

the weber is included in the package.....but if you have your own it can be used as well.... e-mail me for details

 

How difficult would it be with a Mikuni instead of a Weber.

 

How much do you charge for turbo hats?

I have one but the inlet is in the front and I need one that is on the side.

 

Hey 680, do you have any experience with blow-through setups using IDA Webers instead of side-draughts?

 

mazdaspeedrex......yes you can use mikuni carbs for blow through, with no problems.... i just need the carb so i can turbo prep it and to make a custom hat... let me know!!! i would be glad to help

pillage6...... i could modify your hat and save you some $$$$$... p/m me for details


revhed ...... yes i have used IDA's for blow through...the worst part is the float design, it's brass wich crushes under boost... the only remidy is to drill a small hole into the float and fill it with expanding foam , then soldier the hole shut.....it floods a-little easier with the added weight but the float won't crush.... the rest of the turbo-prepping is the same as other carbs!!