Would this be safe to run?

[TonyC]

I tried searching but couldn't find a straight answer so I thought I would ask. I currently have a stock redtop SR in my 93 hatch w/ SMIC. I have 3" high flow cat and exhaust on order. Walbro fuel pump is also on order. She runs fine and pretty strong at 7~8 psi right now. The question is once i get the exhaust pieces on and the fuel pump installed would it be safe to just run a boost controller (most likely gonna be Greddy Profec B) at 12psi without SAFC or anything else? What else would I need to run 12psi safely (wideband 02???) ? Would I lean out or would the ECU recognize more air and richen the mixture? I just want to run 12psi as safe as possible. Any input is appreciated. Thanks.

[TonyC]

bump

[HaLo]

I would only go up to 10-11 psi on the SMIC... That's the part that's clogging everything up.

[the head]

with a better intercooler you should be able ot do 12 psi but why is that such a big deal with more boost you have a better chance of breaking somthing without the proper tuning just buy the parts to handle more power you will break less down the road

[kazuo]

After 0.7bar (10psi or so) the sidemount starts to lose efficiency. You can run 0.8 (12 or so) on it if you want, but performance will suffer once the car's been going for a while because of "heat sink"

If you want to run 12PSI efficiently you might want to upgrade the sidemount, go frontmount or get water cooling/injection

Or you can buy my S15 Sidemount (thicker than S13/14 and good for 0.9bar.. you can probably get away with 1bar)

The injectors are good for it and the fuel pump (when upgraded) will be ok also.

:D

You might wanna look into getting a tuned computer or some kind of A/F controller also.. good luck, do some more research before jumping into it... I'm working on a similar project and I still dont have it all figured out.

[TonyC]

Thanks for the response guys. My plans are just to run SMIC w/ 10-12 psi right now until I build up some more spendable funds. That's why I'm asking if it is safe to run around 12psi w/ just a boost controller w/ 3" exhaust and upgraded fuel pump on the SMIC. I just want more boost, but want to know if the ECU would recognize more air and know what to do with it. I don't really want to spend money on a SAFC if I don't have to (plus I have no idea how to tune it). Later plans do call for a FMIC but funds are scarce right now.

[TonyC]

Also, it isn't necessary to use an aftermarket BOV when boosting higher is it? A friend of mine who has a MKIV Supra says you need one if you plan to run higher boost than stock. I really don't mind having one except I rather stay low profile if possible. Thanks.

[the head]

you need an aftermarket BOV when you change ICs because the stock piece is attached to your SMIC be careful of detonation if you are dead set on running 12 PSI as stated above for the stock IC it is possible but not the brightest idea
SAFC is not required unless you change MAFS or go to larger than stock injectors

[MadChild]

THe SAFC, isn't really required, unless you have a upgraded fuel pump, injectors, mafs, turbo. With those upgrades you really need to keep an eye on your air fuel ration...carelessness will cause engine harm(Detonation)

Just becareful of the boost you run at!

[crash153]

i'll put it this way : the guys at sport compact had their redtop running 12 psi, on a side mounted intercooler... they didn't have problems. it put down 195 hp, and 205 lb/ft of torque. you should definately look into a FMIC.. same setup can give about 20 hp of a gain, and better drivability. hell, with a good fmic and bov people have run 1.1 bar. good luck man, let us know how it goes!

[MadChild]

With the stock redtop SR, you lose efficiency after 15-16 PSI I belive. Hell just but it this way I ran my car at 15PSI stock turbo, fmic, bov....and i didn't have any problems. But those of you with blitz BOV i would suggest you to makes sure everything is seal tight. I had problems with that sucker


GOOD LUCK, DRIVE SAFE, BOOST SMART

[ryan hagen]

get the new sport compact car, it shows how to rig up a water sprayer to cool radiators and intercoolers in a s13 that could cool you down, cause the heat sink in the intercooler could really trash your engine........nad the best part the sprayers are cheap, even if you ran a seprate washer style tank and switch for it.

[kidinthehall]

Heat soak is the term you're looking for, not heat sink. A heat sink is something designed to absorb heat, like fins on an amp case.

[SR20DETpwr]

Tony, if you want to stay low profile and need to upgrade the bov just buy the Greddy recirculating bov. It will take all of the air coming out of the bov and put it back into the intake system - that should get rid of the "swoosh" sound the atmospheric bov's make.

[TonyC]

Thanks for all that replied. So it seems like 12 psi is the threshold for the SMIC. Which is fine because I will hardly go that far. Boost will probably be around 7-8psi 95% of the time on the streets. I will only need 12psi if I'm planning on running the 1320 or dynoing. As far as future plans, a GTi-R T28 is probably gonna go in. For fuel management, I'm leaning towards JWT, so probably no SAFC.

SR20DETpwr: Yeah I like the Greddy BOV. My brother has the Type-S in his MKIV Supra recirculated and it sounds nice without too much "bling bling".