ej207 v7 spec c block
 

Hey guys im a new member on here from New Zealand, im running a ej207 version 7 spec c block with v6 sti heads in my version 6 gc8 sti. At the moment im running around 270kws using a garrett gt3082r, link g4 ecu, 875cc top feed injectors, walbro fuel pump and other supporting mods. Im running 1.7 bar boost max on 98 octane fuel and ran a best of 11.7 at 198.24km/h.......I wanted to know whats the max boost i can run on this motor safely on 98 pump fuel and how much power is safe on it? I want to run around 1.8 bar and make atleast 300kw after changing stock cams to 264 kelfords :) also whats a safe rev limit on them? My afr is around 11.5 to 11.7 at the moment.

3 bar.

[QUOTE=forde;655814]3 bar.[/QUOTE]

3 bar pump gas?? Im sure that wont be safe.

[QUOTE=tez n u;655821]3 bar[/QUOTE]


I think, and this is just a hunch, he was using SARCASM

EDIT: but reallly good combo by the way, great results :) just dont use 3 BAR...

3.5 bar

[QUOTE=MattuZ;655825]3.5 bar[/QUOTE]

haha, SARCASM again? twice in a row seems too unlikely, this must be an actual /proven answer :)

Is this a new comer treatment thing around here?? Please no silly answers j just wanted some good proper answers as i wanted to run into low 11s possibly high tens if im lucky.

What gear box are you running dude?

ye, sorry mate, to be honest there is no right answer.

it comes down to are you willing "to risk it to get the biscuit".

My car makes 270hp @16.5PSI, I could wind it up for 300+hp and risk drastically shortening the life of the internals.

Its the same for you. If you have an awesome combo to start with do you really want to blow it for the extra ponies?

Check out the "new fancy perf thread" few guys running some serious boost on the EJ207's

Is your block a jdm ej207? If so you have hypershit pistons and i wouldn't be putting much more power through it to be honest. Have you thought about building a stroker motor?

Yea i get what your saying but i just wanted to know if my power goal of 300kw is stretching it or if 300kw is a reliable power figure for a 207.

[QUOTE=forde;655833]Is your block a jdm ej207? If so you have hypershit pistons and i wouldn't be putting much more power through it to be honest. Have you thought about building a stroker motor?[/QUOTE]

Yup jdm spec c but a version 7 so forged internals. The hyper crap came from v8 onwards in jdms.

They are not just run of the mill 207's....... Most of the big power builds are running aftermarket rods, 'proper' forged pistons, Arp case bolts & head studs - Then there's some oil system issues to address as matter of course.

how many K's on the block?
How much abuse has it had?
How long is a peice of string?

[URL]http://www.perth-wrx.com/vb/sale-cars-only/38005-my98-wrx-sedan.html[/URL]

^^^ this is SORTA in you area im pretty sure?

Has about 70,000kms on it and compression test came out perfect so far.

best thing to do is look at cars (like the link i sent you GTR ETA) that have internally stock motors and take ti from there, AND then go see someone who has built/owned one.

In nz people dont think a stock block 207 can get into low 11s i just wanted to see if its possible and can be done reliably.

GTR ETA... done, reliable!

[QUOTE='Dan [WRX CS Evo 7];655839']best thing to do is look at cars (like the link i sent you GTR ETA) that have internally stock motors and take ti from there, AND then go see someone who has built/owned one.[/QUOTE

I actually pmd gtr eta couple of days ago asking him some questions, havent heard back yet. His kind of my inspiration lol.

[QUOTE=tez n u;655840]In nz people dont think a stock block 207 can get into low 11s i just wanted to see if its possible and can be done reliably.[/QUOTE]


It comes down to some VERY clever mods and even CLEVER...ER tuning from a mechanic who knows the limits of such cars... tuning is as important (if not more important) then throwing boost.money at your car.

Why do people fully build a motor if the 207 can pump out and handle so much?

I get my car tuned by st hitech a performance shop owned by a japanese guy who used to work for nismo in japan, he has tuned many ten sec and faster cars in nz and has good reputation.

[QUOTE=gtr_eta;334540]Ej 207 with stock heads,jun cams and wheels,headers,gt35r turbo,race fuel,40 odd pounds of boost.. i would not think it would handle that boost power on a track or road i will pull it back now to its pump fuel and 30psi which is 450-470hp it was around 520 at the drags[/QUOTE]

Are you game to try 40 psi?

[QUOTE=gtr_eta;504810]
Ej 207 short motor installed 10000kms ago
Jun 272 Camshafts with Jun springs and retainers
Jun adjustable cam gears
Arp head studs
Sti thick metal head gaskets
Tomei Headers
Tial 44mm gate
Gt35r turbo with .82 rear
850cc Sard inj
K&N 4" inch filter
Greddy cooler
Exedy twin plate
PPG 1st-4th snchro box
PPG output shaft
20 kg centre diff
Kazz plate front lsd Viscous rear lsd
Motec M800 Advanced functions 5 bar map sensor Mac valve
Sard surge tank with 044 pump
Walbro lift pump
[/QUOTE]

[QUOTE=tez n u;655844]Why do people fully build a motor if the 207 can pump out and handle so much?[/QUOTE]

because people want a power band that is larger than 2000 rpm. Sure if you just want straight line speed smack a massive turbo on, do the appropriate headwork and tune it and away you go. It might last 10000kms if you're lucky. Most people, don't have the disposable income to rebuild that often, Sean aka GTR ETA parts owns (?) ASG and is their tuner, which says a lot for how he was able to make his car such a demon. Full access to workshop facilities and a dyno.

If you search on here i'm sure his dyno graph is around somewhere and the area under the curve is fuck all. It was built as a drag car and it did that very well, but as for other aspects of motorsport, i don't think it would be any fun to drive/ be competitive.

what is the saying, straight line racing is a quarter of the fun?

[QUOTE='Dan [WRX CS Evo 7];655841']GTR ETA... done, reliable![/QUOTE]

Reliable? i don't think you could call it reliable...

[QUOTE='Dan [WRX CS Evo 7];655843']It comes down to some VERY clever mods and even CLEVER...ER tuning from a mechanic who knows the limits of such cars... tuning is as important (if not more important) then throwing boost.money at your car.[/QUOTE]

I don't understand this/any of your posts, it isn't like there is some secret mod done to that car...and clearly the OP isn't a retard so I'm sure he knows that 'tuning is important'

[QUOTE=V3 RA;655850]Reliable? i don't think you could call it reliable...



I don't understand this/any of your posts, it isn't like there is some secret mod done to that car...and clearly the OP isn't a retard so I'm sure he knows that 'tuning is important'[/QUOTE]

It is considering the fact it is smashing out such masssssive numbers. not reliable when compared to other WRX's with 300whp.

I didnt say there was a secret mod? I was simply saying that the tune on that car is AMAZING, its knife edge when you consider that car is so powerful for an internally stock motor (minus cams, etc) it is proof of what a EJ207 CAN do. not what he should do?!

And I didnt say anyone was a retard? a car that has been fined tuned to maximise its capabilites would be a better idea then MORE POWER ,more boost pushed to the edge of its ability, !

So looking at what sean did 300kw sjoild be reliable coz its a lot less the what he was running even on his low boost

Dont forget there are alot more variables to consider, hence why each motor will not make the same power. That goes for reliability. And as V3 RA said, i dont think it was reliability Sean was going for, he was more suprised it had last so long. So you'd need a gt35r with a .82mm rear housing @ about 27-28psi using gtreta as a benchmark. However i think you'd need some bigger cams if you want to flow that much air so 264 kelfords may need to be a touch bigger. Alot of people use 272/272 cosworths with great results. Remember its about air/fuel. No good putting a truck turbo on if your fuel pump is too small and your injectors are maxing out. At the same time, no point having small cam shafts that cant push the air or headers that cant flow the exhaust out.

I think 420hp (300ish kw) is achieveable, but as mentioned perhaps at a price of its timed life. Also, as someone has mentioned what gearbox are you running? The amount of torque you are going to try produce will have impact on your clutch,gearbox and drivetrain in general. I think the drivetrain lives will be shorter then the motor by far if they are stock.

Just my opinion, and im no guru just from past observations. T.J (the gearbox king) is a main observation as per usual :P

EDIT: I hope you have some money trees, things normally break.......

Man people do this all backwards.

Go see your tuner, ask them how to achieve your goals. You will need supporting mods. Your 264 cams should be bigger. You will probably need to swap out the turbo for something bigger.

The boost figure is just that, how much boost you are smashing into the engine. More boost does not mean more power. You need to have a correctly sized turbo to suit. Start having a look at the turbo compressor maps, plotting out your planned boost levels and calculating an approximate power at a suitable rpm.

Remember big turbo = spooling later = more revs needed.

A stock EJ207 short motor is capable of 3 bar on 98 RON fuel when tuned correctly. Plenty run around on 2 bar. But 2 bar with a TD04 is completely different to 2 bar with a GT35R.

So a gt3082r is not capable of a high ten sec pass?? I thought it should be able to do it since a few people have done ten sec passes using gt3076r?? I ran the 11.7 at 198km/h on around 250-260kw, with that trap speed i should be able to hit atleast a mid 11 to maybe a 11.4, my 60foot was 1.8 maybe if i drop that down a bit i should be able to pull a low 11sec?? Going by what the car is doing so far i figured maybe another 40-50kw with a bit of weight reduction should yield me a high ten sec pass or even a low low 11.

Heres a few pics of the car and time slip :)

[IMG]http://i21.photobucket.com/albums/b290/avinesh/20120223_182940.jpg[/IMG]

[IMG]http://i21.photobucket.com/albums/b290/avinesh/zzz.jpg[/IMG]

[IMG]http://i21.photobucket.com/albums/b290/avinesh/20120218_012650.jpg[/IMG]

[IMG]http://i21.photobucket.com/albums/b290/avinesh/IMAG0070-1.jpg[/IMG]

[IMG]http://i21.photobucket.com/albums/b290/avinesh/20120226_194403.jpg[/IMG]

Nice car mate, please do an intro thread and tell us more about it.

[QUOTE=tez n u;655889]So a gt3082r is not capable of a high ten sec pass?? I thought it should be able to do it since a few people have done ten sec passes using gt3076r?? [/QUOTE]

Compare mod lists and power graphs. If a few people have done it, then it should be a simple walk into workshop with a hand full of money, walk out with 10 second car.

[QUOTE=Kato;655911]Compare mod lists and power graphs. If a few people have done it, then it should be a simple walk into workshop with a hand full of money, walk out with 10 second car.[/QUOTE]

Yea problem is it has been done in the u.s :(

Ah the old USA comparison.

10 second pass at a NHRA sanctioned track and event?

Or a 10 second pass at some track out back that prints you a slip. It is the same as a lot of their dyno figures. Great numbers, but unable to be done anywhere else in the world.

In the US with 2.0 or 2.5?????

[QUOTE=V3 RA;655849]because people want a power band that is larger than 2000 rpm. Sure if you just want straight line speed smack a massive turbo on, do the appropriate headwork and tune it and away you go. It might last 10000kms if you're lucky. Most people, don't have the disposable income to rebuild that often, Sean aka GTR ETA parts owns (?) ASG and is their tuner, which says a lot for how he was able to make his car such a demon. Full access to workshop facilities and a dyno.

If you search on here i'm sure his dyno graph is around somewhere and the area under the curve is fuck all. It was built as a drag car and it did that very well, but as for other aspects of motorsport, i don't think it would be any fun to drive/ be competitive.

what is the saying, straight line racing is a quarter of the fun?[/QUOTE]

Let me rephrase that, if a ej207 can make 300wkw reliable then why do people run built motors for 300wkw? You dont even need a gt35r for that much power so more then 2000rpm of power band.

[QUOTE=tez n u;655941]Let me rephrase that, if a ej207 can make 300wkw reliable then why do people run built motors for 300wkw? You dont even need a gt35r for that much power so more then 2000rpm of power band.[/QUOTE]

even with a TD-06 on my 207 i wasn't making full boost till around 5-5.5k rpm...even with an 8k rev limit it still isn't much to work with. It isn't about the power figure, it is about the area under the curve. Which is why i am building a 2.2 with some very responsive supporting mods which i am hoping will be well on the way to full boost by 4000 rpm....with a GT35r .82.

what i don't think you're understanding is that sure, you can build a quick car with a 207, but it isn't going to be good at much else except limiter launches and quick quarter mile times....and it will be running on the ragged edge with a low life expectancy. 207 bottom ends aren't that pricey, but the labour to replace/rebuild a bottom end every 10000kms isn't going to go down well with the wallet.

to be more direct...

No one is saying that you can't build a 300kw car with a 207, but if you do, it will essentially be a drag car and that is it. I'm sure i don't only speak for myself when i say i like staying away from the bogans at the motorplex as much as possible.

If you're interested in drag times and power figures go nuts, but there will be someone with a H6 ready to shit on you.

207 for lyfe!

I agree that the 207 is a magic engine but really you want bigger displacement for drag times. Track work however....