Hello,

first post here, use to be a club4ag member "piston freak" but after much disappointment with 2 toyota 1.8 engines i gave up on them.

back to the rotary i go.

building a 85 13b 4port engine for turbo, and going to use a weber 48ida blow through system. and just wondering if anyone is using the same set-up?? need some advise on what to get, or what problems i will encounter??? pls help with any info

thanks

 

I'm sure this isn't what you want to here, but carbs, turbos and rotories don't mix. Maybe if your an old school tuning legend and your super careful, then you might have some luck. Just maybe.



I know it seems like a lot of money to go for injection, but it is worth every cent. It's not like an IDA is cheap anyway. At a bare minimum use a fuel only setup and 12A Turbo distributor.



By the way what does "disappointment with 2 toyota 1.8 engines" mean? Did you pop them? If so, anyone who can't reliably set up a piston engine will hate rotaries. They are a good thing when setup properly, but have zero tolerance for poor tuning.



Sorry to be negative, but I just want to let you know what your in for.

 

here the thing,

i have ran rotary before but not turbo..... i ran a street port with a holley 650 double pump, and the car was untouchable. but now i want to try a turbo set-up, i have a friend that ran a 13b turbo blow through system with a mikuni 44 side draft and there was not a single car out here running on NOS or gas that was able no catch him. and his car was a daily driver.

now as for the disappointment with the 1.8, i should have invested the money in a rotary from the beginning. i went with the 1.8 for less noise, but even after twin weber 45 head ported/polished, valves cam, 60 over piston, deck block. there was just not enough power there.

 

blow through will work great!get a carb hat made , get a high pressure fuel pump, use a rising rate fuel press. regulator and your fuel system is done!!

 

how many psi fuel pump will i need???

and what is a rising rate fuel pressure reg??

 

Oh no!!! Rotories, carbs, turbos and a POS rising rate fuel pressure regulator, I'm gettin' out of here!

 

My cousin has that setup on his FC now.....cars not running now but when it did it was making about 350rwhp.

 

sweet another ae86 rotary conversion

anyway

go with a holley intake rather that the weber (i know from people who tune euros that webers r a bitch) but just get a manifold from mazdatrix and get a carb from someone else (the $800 package is ridiculus) like jegs and get a set of jets and power valves

a carb enclosure from vortech or paxon or get a custom one is best

a aeromotive boost referenced fuel pressure regulator from jegs



ok here what i know about the setup from supercharging a carb (blow through) you need to have at a minimum of 3 psi fuel pressure over boost pressure but a 1:1 pressure increase is made with the regulator

so you will likely get 6 psi fp over 1 psi bp because you start with based fp for the carb and go up ( for 10 psi bp you have 16psi fp)

a faster than standard accelerator pump cam is needed with boost as well

it is a fairly simple setup

i would tune the carb without boost first

and do it on the rich side and then see what happens with boost

also a afr is a must so you can keep an eye on it

a wide ban is best but if you can read spark plugs a standard sensor will work



i am trying to build the car for the $2004 challenge and will prob just port the stock intake and modify it for a holley

i have a holley tuning master next door an we know where we can get used holley cores for $5 a piece

i am runnng a brand new to4b i got for free and i think we will get away with it gonna boost 10 psi

hell the stock 12a will out perform the 4ac 10 fold

all there is now will be to find a cheap standard trans and flywheel for it

or get a flywheel and use a the t5 from the failed 3.1 swap

hey jsu to be interesting i am using the auto bellhousing and a through out bearing/slave for a 92 jeep cherokee

 

It's a great reliable setup but I was thought with Holley carbs. Blow through is an easy way to go fast cheap. Email me and I'll give details on how to build the best carb for the street. The whole carb has to be ripped apart for the street. Custom pump cam must be made idle air bleeds get changed throttle blades get shimmed boosters and jet get changed. The stock pump is good for 500+hp sence it's ran at hi valume low pressure. Use only aero motive regulator 13301. It's the only one I trust and it comes with a efi spring if u want to go back.

 

If anyone wants help tuning carbs on anything let me know and I'll gladly help. I'm tired of rotaries getting a bad rep from bad tuning. Do it right and enjoy reliable inexpensive horse power. Friend me or email me and I'll give u my phone number cableguyr1@hotmail.com