Gt HP boost Options

[devilsden97]

Whats the best bang for your buck, to increase your hp in a 5S-FE motor?(totally stock) How much HP upgrade should i be looking at? (with whatever your suggestion is.) And does putting Super or Premium gass really effect hp enough for it to matter?

[shin]

first of all. do a search before you post. this has been answered tooooo many times. now to answer your question. the 5sfe is meant to be an economy engine. depends on how much your budget is, you can do a custom CAI (cold air intake), there's a how to here, cheap and good. then there's exhaust. you can either go custom or Factory exhaust from Greddy. SP1 which are really hard to find since it's discontinued and SP2. chanh and some other members have them on. custom would be getting any staight through muffler of your choice and do a straight pipe 2.25" or 2.5". i won't say headers cause there ain't one for our 6gc. but there are headers for the 5sfe and if you wanna get one. you'll have to modify it to fit. if you have alot of money for mods. you can always go for a turbo set up. read up manny's post on his 5sfte project, he's pushing 203hp and 246lbs tq or you could choose to swap in the 3sgte. stock toyota turbo engine pushing around 220hp+.

[devilsden97]

yeah i know about the search, sorry lazyness set in.

How much additional horsepower am i looking at with the addition of a Coldair intake and a 2.5" exaust? dont intakes give u like 10% or like 10hp, and exaust gives u like 5hp or something? idk just what would u all think? or how much do u know for sure.

[shin]

for CAI... 10 is too much IMO.... i'll probably give it a 5 max. exhaust.. probably 5 max too... i wouldn't know for sure since no one that i know of when to dyno stock then dyno with CAI.. or the same for the exhaust.

[Bigmeanbulldog55]

I'd say sence it's a 95, a tune up is your best bet first. I know that's not something you can brag on, but it really does help. New wires, plugs, distributer, fuel filter, whatever else you feel like. If you start with a good base, you'll pick up better numbers. 5hp for intake, and 5 for exhaust is good estimate, but I'd give them 15hp together. I don't have many mods, but my car has had an almost complete tune up. It really helped. I asked the same question you did a good wile back, and I found that it's mostly just good sence that leads you to your next mod. The 5sfe is a low reving engine, so cams really help. Them plus header, exhaust, and intake make a nice combo. You can search around. There's always port and polish head. Better clutch is good too, I got a nice gain out of mine. I'm just rambling. Good luck modding.

[macavely]

well here is something that doesn't get talked about to much .. but can/should give you a nice little kick in the ass and in the wallet.. high compression pistions... forged rods... stand alone ecu .... injectors...fule pumpe ... ignition system....

i'm leaving alot of stuff out just coving the basics.... most people will tell you with the money your going to spend to do a sawp and that the FE head is extramly restrictive... but hey sometime you have to stop listing to some people and just cross that line to see where you can go ... example look at manny turboed 5s ...

the 5s has the 9.5:1 pistion... so why not do some old school work with a new school twist .. don't only change the internals.. change the ecu so that work and money doesn't go to waste .... upgrade everthong else air/fule/spark ... don't foregt that if you change one us have to change the other 3.... if u want you engine to last and runn right ... i don't know if this made and sense to anyone .. i'm at work and half asleep again... if not i'll try editing it later..

[Silver94CelicaOw...]

Its only a matter of time before a 6gc'er does some serious N/A mods to a 5sfe. There have been several impressive builds over on MR2OC, but that involves money. The best thing it seems to do for power on the 5SFE without forced induction is going intake, header, exhaust, cams, an SAFCII or a stand-alone and lots of tuning, an so forth. Me, I would rather have the fun of boost, but I'm sure theres also fun to be had by getting the 5S to be a better rounded performer.

[Kwanza26]

I personally don't feel a true n/a 5SFE can be had without completely redoing the motor... Custom rods, custom pistons, custom everything. Impractical.

[Silver94CelicaOw...]

This is true...it wont take on much life without FI unless you change inernals or have some seriously wicked camshaft profiles and a rough idle...lol

[TTE]

When I drive my MR2 Turbo with my friend's MR2 NA he is all the time behind my back and its realy hard almost impossible to run away from him. His mods are Intake and MSD ingnition. He is claiming that he felt difference when he installed 'em.

[blu94gt]

When I drive my MR2 Turbo with my friend's MR2 NA he is all the time behind my back and its realy hard almost impossible to run away from him. His mods are Intake and MSD ingnition. He is claiming that he felt difference when he installed 'em.
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I've been looking at an MSD ignition system. I know that on 5.0 Mustangs (the only car I've ever changed the ignition system on) they make a big difference, but I haven't found any references to our car. Which MSD did he install? There's a lot of different models and I was just curious which he had on his NA.

[devilsden97]

basically it seems that most agree that a full exaust, headers, and CAI or a plain after market intake. But there has been some debate over the 5s-fe need for a modified header. People say on this site that there are no aftermarket headers taht fit perfectly with out any modification needed, while others talk like its a complete bolt on.

The exaust, I know that Pressure 2's exaust is 3inches, but his 5s is turbo charged. I was thinking about 3inches right when I saw it on P2's but i was warned by a friend that unless i turbo mine its gonna mess with my backpressure. Will it??? and if it does, what size would you suggest? 2.25 or like 2.5 inches.

The Intake, The only intake that i have seen that can be bought aftermarket is an Injen, and its not a CAI. I was really looking to get a CAI, either bay AEM or a comperable company. Does the 7th gen celicas aftermarket CAI fit the 6th?

Toss out some sites of places where you have gotten stuff for your cars.

[shin]

like i said before. you should do a search before asking. cause this kindda topic has been covered alot of times. here's info on how to make your own CAI.
Custom CAI by Urbandork

unfortunately. from what i know. injen and weapon R have intakes for our celi, btu they are all short ram. AEM doesn't have any CAI made for our celi. but urbandork's custom CAI works just as good and it saves you alot more money which you can spend on other mods

[Bigmeanbulldog55]

As for the header, I'm currently trying to find out what are the exact modifications needed to a 4th gen 3sfe header to make it work on the GT. I'm trying to get someone who has it on their car, or someone has as put one on a car to give me some input. This again, is not really meant for the 6gc, but it's ingenuity that we should be proud of.

[TTE]

When I drive my MR2 Turbo with my friend's MR2 NA he is all the time behind my back and its realy hard almost impossible to run away from him. His mods are Intake and MSD ingnition. He is claiming that he felt difference when he installed 'em.
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I've been looking at an MSD ignition system. I know that on 5.0 Mustangs (the only car I've ever changed the ignition system on) they make a big difference, but I haven't found any references to our car. Which MSD did he install? There's a lot of different models and I was just curious which he had on his NA.
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MSD 6A

[celicast3sgte]

get a 2.5" exahaust that way it wont hurt performance too much on bottom end and still leave room for improovement.

[Silver94CelicaOw...]

I know I've probably said it before, but if any of you are serious about making more power with the 5SFE than go to MR2OC and read their stickies....its excellent knowledge.

I've picked up on a few things just for the hell of it even though I dont intend to build up my 5SFE.....I'm bored, so I'll write up a list of things to consider for others. Most guys get impressive power gains from combinations of these sorts of mods-

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Camshafts. Most serious builds use a more aggressive camshaft profile to enhance the mid-top end power curve. Webcams as well as some machinists that frequent those forums can make an excellent camshaft for not too heavy of a price.

Head Shaving. I just read of a guy who had his cylinder head machined down like 1/8" or so, and it boosted his compression a good deal...his MR2 puts down just over 135 WHP with that and P&P, Intake, Exhaust and header, etc. so obviously something worth considering if you know of a good machining shop.

Header, Exhaust, Intake, and De-Cat. I put these all together because they all correlate to freeing up the stock restrictions and can all be improved upon with aftermarket items. Exhaust? Custom. Header? Custom again, but other FE block headers usually fit with modifications. But this is pretty much square one to making the 5S perform any better.

Individial Throttle Bodies(?) Think of the 4AGE's and motorcycle engines that use ITB's and it makes sense. But this is a tough one considering you need to rig something up electronicly since your one throttle body has been multiplied by four and intake manifold butchered to fit them all. One guy sold his MR2 just as he was rigging up Honda sportbike throttle bodies on his, but never got finished I dont think.....damn.

Fuel, Spark, ECU. Aftermarket ignition will be a good move if you introduce any more fuel, and more fuel plus the means to adequately ignite it quickly and completely will produce more power. Fine tuning of both the air/fuel ratio and timing of the engine will optimize output any engine, and certainly helps on the 5SFE which uses crude electronics to manage the engine anyway. MSD ignition, Apexi SAFC 2 or standalones (Emanage, Megasquirt...etc.) with the guidance of a dyno or wideband O2 sensor will best fit the bill.

Engine/Head. The obvious. If you blueprint the block, port and polish the head, get upgraded valves and springs, high compression pistons, forged rods or cryotreated rods and crankshafts....etc....you'll be not only strengthening the internals but providing a good (albeit expensive...) foundation to produce more power due to the increased compression, or if your crafty more stroke or displacement. Again, this requires a machinist or engine builder with the right tools.
The biggest kink in the 5SFE's performance is its head design, so getting the head fully ported and polished with a 3-angle valve job with improved springs and valves will help.

Clutch & Flywheel. No, it doesnt actually make more power, but a lightweight flywheel and firm clutch will handle the extra power even better and plant it to the road quicker with less drivetrain loss in all likeliness.

MAINTAINENCE! Keep your 5SFE well lubicated and change oil before you see its getting old and dark with a good synthetic oil like Mobil 1, or Royal Purple (read a non-biased article in Modified about how superior Royal Purple synthetic is due to its abundance of additives that gasoline manufacturers of oil dont care about...so I give it a thumbs up. ) Redline, Pennzoil synchromesh, or other brands of trans fluid for smoother shifting, clean fuel filter, timing belt, spark plugs and wires, and other routine maintainence should come FIRST. Your engine wont care if you have a sick camshaft profile if you have a leaking headgasket and bad compression, along with those fouled spark plugs you've had for 8 years.

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So anyway....that's my rant regarding power upgrades for the 5SFE. Bottom line- Money. If you want to do it right, you need to buy good parts just like any other upgrade and tune them as best as possible. N/A power is more focused on what makes a engine produce power and improving upon it, so it wont be cheap but there are some more cost effective ways to bring about an improvement. Just tune it very well, have it built strong and correctly with good parts and drive the crap out of it.

[frosty]

There should just be a sticky on this.

[Bigmeanbulldog55]

There should just be a sticky on this.
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I fully agree. Isn't there one on Celicatec? We could just copy it, can't we? I need to spend more time on other sites.

[Silver94CelicaOw...]

Yes we should have a sticky on this since this forum has been turned into N/A performance, more or less.

In all honesty, if i didnt love the 3SGTE motor to death I would be educating myself to build up a high output 5SFE. I would love to see it done just because it has been but only in other communities.