dohc for the 2.6

[cheaterparts]

I don't believe its any harder to get 300whp from the sohc 2L as any other 4cyl, eh. Apart from head porting, what extra is 'required' ? Now I'm only referring to mpi cars.
What I *don't* see is folks applying the same effort.

There was an superb staz effort shown on an oz website that dyno'd ~300hp? at only 15psi, in some shootout competition. Iirc it came runner up to a 2.6 izusu? May have been a link from beyond the limit? or coltspeed? site. Anybody remember it ? I think it is an excellent example of street 2L setup.... nothing exotic.

still comes down to cost ( lets break it down )
bigger turbo same cost ?
custom exhuast same cost ?
ported head more on 2.0 as a magna M6 need little work
MPI more on 2.0 as magna Mpi are easy to get in most wreckers and why do you think so many look at fitting 2.4 bottom ends 4g63 ?
maybe the extra size makes it easier to gain extra Hp and torque
now with that in mind think 2.6 and add the same boost and comp with Mpi same fuel

I have no problem if you are running a 2.0 SOHC when you get your 300 rwhp let everyone on the forum in on how it was done

I just beleve it's easier and cheaper with a 2.6

cheater

[quest]

you've selectively cut out an essential part of my post, only to make a point that nobody is argueing - 2L vs 2.6. Does that make sense ? No.

I simply said to throw the same recipee at the sohc 2L, as you would a 300whp sr20 or vr4. No shortcuts. This motor is not some handicapped job that needs anything 'special' or a miracle, as folks make it out to be imo.
If the head "bottlenecks" at 300, then 'deal with it'.

Why would *I* need to post my 300hp 2L assault, when others have already blazed that trail. The smart thing to do would be to learn from them, no.
Here, I found the link. This is one such example that proves *exactly* what I'm saying
http://www.beyondthelimit.com.au/borbet11.htm
http://www.beyondthelimit.com.au/borbet10.htm

[mrb1]

you've selectively cut out an essential part of my post, only to make a point that nobody is argueing - 2L vs 2.6. Does that make sense ? No.

I simply said to throw the same recipee at the sohc 2L, as you would a 300whp sr20 or vr4. No shortcuts. This motor is not some handicapped job that needs anything 'special' or a miracle, as folks make it out to be imo.
If the head "bottlenecks" at 300, then 'deal with it'.

Why would *I* need to post my 300hp 2L assault, when others have already blazed that trail. The smart thing to do would be to learn from them, no.
Here, I found the link. This is one such example that proves *exactly* what I'm saying
http://www.beyondthelimit.com.au/borbet11.htm
http://www.beyondthelimit.com.au/borbet10.htm

Ok so you have found ONE 4G63 SOHC car in Australia getting 300+ rwhp. I remain to be convinced :roll:
Chris vitually rebuilds the head to get that sort of flow. Why don't you get a price on one of his trick cylinder heads and get back to us.

[Junkers]

I myself am aiming to get 300rwhp out of a 2lt sohc engine I'll list everything i have done once it goes to plan, currently the engine runs about 220bhp on 13psi with the balance shafts removed on a mild cam with all your normal extra's like a 2.5inch straight through, cut airbox going to a TC-06 through a stock intercooler.

Next couple of steps will be too throw on a mpi system with a vr4 injector setup with a race cam.

All in all though a 2.6 manga would theoritcally have more power than a 2.0 sirus on the basic logic that 'bigger is better' for some it may be cheaper to do a 2.6 but for me here in new zealand it is far cheaper to do a 2.0 if 300rwhp is all your aiming for

[WidebodyWoody]

Once I change my injection system and cooler piping, and put my boost up to 15psi I should be easily at 300rwhp. I am on about 11psi at the moment and have 220rwhp. This is without doing any head work. I have the 2.6 SOHC though.

I have a different turbo on and my cooler piping is ristricting it tooooo much. the turbo pipe is like twice the size of my cooler piping. And the boost isn't in its efficiency range.

[quest]

mrb1,
No, I found ONE car running the turbo size/ boost/ tuning quality and supporting mods that I'm referring to.
You must have seen other 2Ls *with equal efforts* fall "way" short of this output, that 'convinces you' that these motors are incapable, eh. Where are they ?
I got news for you. A motor making 300whp+ to the threads at a 'measly' 15psi is NOT a '300whp' motor. Far more left in it, get serious.
Look at the vr4 with its 'wonderfully flowing head' and tell me how many of them you see making 300+ @15psi.... do the math.
Why do I need to get a price from Chris, when it sounds as if you already have? Post it.
With due respect to Chris' head work, whose others have you seen unsucessful? Its unfortunate if its priced out of reach, but no single person is "the gateway" to uncorking power out of this or any other 8v 2L motor - that minset gets you nowhere.
In my vicinity there are a nest of puerto ricans. They build the fastest street and strip 4cylinder cars in the world, in case you didn't know. Reasonably priced head porting is about, -if- I choose to go that route. Turboford 2.3 guys port their 'own' (very restrictive) sohc heads and get 4-450+ to the threads from their street cars. I posted one recently. Too bad you feel there is something *drastically wrong* with the 2L sohc mitsu head. No need to convince :)

woody,
300 is no biggie for the 2.6. Quite a few on starquestclub.
One I know of is at 420+ with his t3/t04b (h-3 comp).

[WidebodyWoody]

I know it isn't a biggy but I am proud of it after only doing a few mods so far. Can you post up what they did to get the 420+

[SpidersWeb]

hah Chris Collier has the same shape and colour schemed Starion as me.

Its interesting, I just worked out the costs, and perhaps SOHC is a much easier plan of action. However, Im curious, how much headwork is required to push 300rwhp? Lots of guys here doing 300+ using a mere polished VR4 head.

What Im trying to work out, is would it cost more to fit a VR4 engine than to achieve 300rwhp on the SOHC engine. Many guys here running 200-250kW@all four wheels, with mild/average mods, nothing crazy.

Serious question, Im not anti-DOHC or anti-SOHC. Im just curious.

[cheaterparts]

(1) You must have seen other 2Ls *with equal efforts* fall "way" short of this output, that 'convinces you' that these motors are incapable, eh. Where are they ?
(2) I got news for you. A motor making 300whp+ to the threads at a 'measly' 15psi is NOT a '300whp' motor. Far more left in it, get serious.
(3) Look at the vr4 with its 'wonderfully flowing head' and tell me how many of them you see making 300+ @15psi.... do the math.
(4) Why do I need to get a price from Chris, when it sounds as if you already have? Post it.
(5) With due respect to Chris' head work, whose others have you seen unsucessful? Its unfortunate if its priced out of reach, but no single person is "the gateway" to uncorking power out of this or any other 8v 2L motor - that minset gets you nowhere.
(6) In my vicinity there are a nest of puerto ricans. They build the fastest street and strip 4cylinder cars in the world, in case you didn't know.
(7) Reasonably priced head porting is about, -if- I choose to go that route. Turboford 2.3 guys port their 'own' (very restrictive) sohc heads and get 4-450+ to the threads from their street cars. I posted one recently. Too bad you feel there is something *drastically wrong* with the 2L sohc mitsu head. No need to convince :)
(8) woody
300 is no biggie for the 2.6. Quite a few on starquestclub.
One I know of is at 420+ with his t3/t04b (h-3 comp).

(1) I dont remember anywhere in this tread where it was said the 4G63 was incapable of 300 + rwhp

(2) you could be right ( although it is possable but its more likely to need more boast )

(3) cant help you here never played with a VR4

(4) I think this was just to point out the cost as the cost of porting would be more than a brand new M6 magna head casting that already flows heaps

(5) Right again Chris is one of many around the world that do great work to improve ports however none are cheap

(6) No Puerto Ricans nesting around here Bugger it we could ask them

(7) Is there anything drastically wrong with the 4G63 sohc mitsubushi head? But as for reasonably priced porting It is in most cases however if something takes more work it will cost more

(8) Its good to see you agree with woody and myself on how easy it is to get good figures from mitsubishi old lump off cast iron
and here in OZ it reasonable cheap to

[mrb1]

Lots of guys here doing 300+ using a mere polished VR4 head.

What Im trying to work out, is would it cost more to fit a VR4 engine than to achieve 300rwhp on the SOHC engine. Many guys here running 200-250kW@all four wheels, with mild/average mods, nothing crazy.

This is what I'm getting at. 300+rwhp on a basically stock VR4 head!
Open heart surgery has to be performed on the 4G63 SOHC head to achieve this. Chris does good work, you get what you pay for.
That's all I'm getting at. Back to my original statement getting 300rwhp is not EASY with the 4G63 SOHC head.

[quest]

woody,
he runs the same basic *typical* stuff, exactly as you see on Chris' car.
SFP exhaust mani/ t3t4 turbo/ magna intake(imported from your way)/ standalone (good tune)/ TEP cam/ head work/ fmic/ plumbing
he posted his old dyno on starquestclub;
t04b/Vtrim/0.63/stageIII @21psi made ~330hp/400tq to the wheels!
He told me he revised his intercooler/pipes only and gained 25hp more on top of the 330.
Current turbo; t04b/H-3 comp/stage5/0.82 took him over 420+. Car rips!

This is the sorta stuff I'm talking about. Is this what some of you guys refer to as *very hard to accomplish* ?? There is no way to get 'solid power' from any 4 unless u apply the effort, simple as that.

sure, a stock vr4 head will make 300hp no prob, but it will never see that *without* the boltons.
Nobody answered the question; how many vr4 u see making 300+ to the threads at *under 15psi*.... THAT is the point I stress to show you that Chris sohc will bat with the best of 2L, end of story.

[WidebodyWoody]

Thanks quest.

That is good to know that he got those results after doing some head work and the cam. Makes me feel better about my result. Considering that I haven't done the MPI and piping yet and haven't god any more then 12psi. But I can hardly wait.

[Junkers]

what's 'stage 5'?, would a 2.4lt sohc engine running 13psi on a TC-06 / multipoint fuel injection on rough idle race cams be capable of 300rwhp?

[NXTIME]

Don't forget that just about all the US dyno figures are achieved using a different dyno (Dynolog) and the drivetrain loss is much less than AUS ones (mostly Dyno Dynamics). I think the relative figure is ~10% difference. That is not to detract away from the results achieved, as the 1/4 mile doesn't lie.

[airbats801]

Yes we all want a g54b with this head on it.

That sure is a pretty engine....