Blow through carb set up
 

ok well i recently bought a rx7 and want to boost it...but im not sure if on going to use a turbo or not...if i do it will probably be a holset or larger t3..but as of now im looking into building a homemade supercharger kit...i was going to use and eaton m62 or m90 but i wasnt going to mount it to any part of the intake except for a charge pipe i was going to make a custom box underneath the the SC then have an air filter go where a TB would usually go....and that way i could run a IC and BOV on a roots or twin screw blower...and i have an electric fan to i could uses the bracket where the old fan was to run the SC i know it would work but the only thing im worried about is tuning...i dont plan on swapping the engine concidering it only has 60K on it...and i want to keep the carb..if anyone can explain to me how the blow through set up works or how to set it up it would help alot...iv been searching but never really found anything explaining it

Re: Blow through carb set up
 

good idea to search turbomustangs.com forum, they have aforum just for blow thru :y

Re: Blow through carb set up
 

Yeah, check out turbomustangs.com for sure. I'm doing a blow through on my car... Youre going to need at the very least..

rising rate fuel regulator (mallory makes a good cheapie, check summit)
high pressure fuel pump
carb bonnet
possible hobbs switches

I got a cold start injector off a 4Runner to spray little more fuel if it starts to lean out, at least thats the plan.

Depending on what the carb is like you might be able to use it as is, but you will have to see if the floats in it are crush proof or not.. If you cant use it I would probably use a small holley 1bbl off an old ford (easy to get jets for it) or a webber blow through carb (they conme up on e-gay every now and again)

Re: Blow through carb set up
 

nopistons.com

someone on there had one running for a while like a year ago or so i think.. it should be in the 2nd gen forums, i dont remember exactly who it was though

do a search there and you should find what ya need

Re: Blow through carb set up
 

thanks for the info..the boost will not be the problem im just new to carberator ..i never messeed with them before

Re: Blow through carb set up
 

http://www.hangar18fabrication.com/blowthru.html
A how to for setting up holley's for boost.

Re: Blow through carb set up
 

^^^^ thanks this helped me out a bit

Re: Blow through carb set up
 

The OE RX7 carbs are a knock off of a Holley i believe anyways but you might want to grab a Holley 4barrel and a adapter plate/intake manifold from Racing Beat or someone.I see carb hats of ebay all the time for $50-100 and Summit rules for carb fuel system parts :y

Re: Blow through carb set up
 

WOW you're getting lots of bad info my friend! Well in all honestly there are probably about 150 blowhrough FB's in the US. I'd say 140 of them blow through a weber. 5 on holleys and 2 on nikkis. I've got a FB with a S5 13BT blowing through a weber. I researched the supercharger thing for long time (2 years) and honestly none are efficiant enough to be honestly worth it in the end. Unless you go whipple. But then paying $6000 for just the charger you coud've allready had a 400whp turbo. My friend ran a Atkins 9" chager and at 14 psi with huge ports he put 210 to the wheels. Threw it away and now makes 350 @10 psi turbo. ---- on a stock S5 you will make 200rwhp @12psi. Most the info you seek will be better found on www.rx7club.com. Nopistons tends to be more FI and Big HP na related. As far as blowing through your Nikki. It's nothing like a Holley. They're way different carbs. So with that in mind yes you can run a Holley on your car, but you'll need the RB manifold too. If you just get a RB manifold any old carb won't just work. 4 barrel carbs are designed to have a constant flow drawn fron all 4 barrels even f 2 are closed. That's why you pay $600 for a $300 holley from RB they have to be modded just to run on a Rotary. As far as I know the only person to successfully boost prep a Nikki carb is Robert at www.rotaryshack.com noone is going to tell you how to do it because it's propietary info. But he can do it for you for a great price.
https://www.homemadeturbo.com/forum/...?topic=63704.0

Re: Blow through carb set up
 

^^^ this helped tons...but now my tranny is making some stupid noise so i ay need a new 1 :S