evo 8 head with 420a block

[NWHTanK]

Not sure if you understood what I meant. I was agreeing with the earlier post that in the engine bay of a srt4 people have swapped for a 420a head to provide more room for a turbo. The largest engine in a srt4 with out banging the firewall is something like a 50trim.

Yes in an eclipse there is plenty of room, however I would still see no reason to swap the 420a head for something else. A good port job and rebuild valve train is all that is needed. This will get the OP what he needs IMO.

NP .. my apologies.

 

[kidtsi]

3 grand, maintenance time!!!

 

[LandSpeed-DSM]

He is claiming to have a setup that is essentially 1000hp capable if he is running a 72mm inducer. I think physical proof is required of his buildup before I answer any question seriously because otherwise I am wasting my time on a troll.

That, or you need to sit down and measure the compressor wheel inducer in your turbocharger because it is highly unlikely you are running what you are claiming on a FMU with stock ECU.

Basically this is why i didnt take this seriously.. OP is suggesting he has some 42r sized turbo on a 420a and is yet looking for more power like it's tapped out as is

Maybe he owns the turbo, but doubtful it's on the motor let alone running.

Properly supported, that's an easy 5 figure affair on a 4G63 nevermind a 420A and there is no way he could have gotten that far along without being able to tell how stupid this thread is.

 

[FRslimmyjim]

I do have a fully ported head with oversized valves, crower springs and retainers, and soon to have crower cams and cam gears. I was just asking a question to see if it was possible since no one has done it or even tried it. I don't know where the 1000hp came from. I just know my internals and clutch can hold 700hp regardless of if I will ever get to that number or not. I'm trying to go quality (reliability) and power and leaving the cheap stuff alone. Yes I know I have an fmu which I can't stand that's why I'm going to buy a megasquirt 3 and 880cc injectors and it is also the reason I don't drive it and I actually bought another car to drive.

 

[Miasma]

Just remember the world record 420a is 661whp.

Doesn't matter how strong the parts are, the 420a crank shaft lacks in design compaired to a 4g6#. If you already have a ported head with a full build valve train why would you want to swap it out anyways? From what your saying, your motors got everything you need, especially for 400hp. Posting a thread like this can be misleading when you don't list what you have first or on your profile.

Either save the 3000 for when something breaks or do some maintenance work.

 

[Slo2gen]

The bedplate design on the 420a is actually a very sturdy design. I don't know of too many people that have broken a crank on a 420a car.

 

[FRslimmyjim]

Then why is it that the 420a can't get as much power as the 4g63? I am sorry if that is a stupid question but I have heard so many different answers.

 

[Archer Fabrications]

It just cost significantly more to get the same results as even a stock 4g63. And is usually more economical to just buy a turbo dsm. You dont see the 420a being the fastest 4 cyl in the world do you?

 

[Slo2gen]

Then why is it that the 420a can't get as much power as the 4g63? I am sorry if that is a stupid question but I have heard so many different answers.

Far too many variables to list, point blank, there are not as many people putting the kind of money that some of these 4g guys have into the car. Parts for the 4g motor are so much easier to come by and cheaper because there is a bigger market. Just take a gander at neons.org and see what some of those guys are doing. Same bottom end design as whats in the 420a eclipse.

 

[glowryder]

^ This However.. goal is the thing i want to point out.. there's plenty of 10 Sec and i think even 9 sec neons (420a), although they are not making 1000Hp+, they are still making excellent times..so the motor is perfectly capable, but like others have said, $$$>...

And i agree. I dont think out crank or bottom end is the road block for big power.. Its simply $$$..

the 420a community usually focuses on Power.. and doesn't realize that its not just the motor and the power.. its how its applied..suspension, trans, Tire setup etc.. Im sure theres alot of the 420a guys on here could be alot faster if they put money in the right places, and driver skill, thats critical

 

[Miasma]

So we've already discussed all the parts you have in the block and head. All I think you need to add is cams, gears, and megasquirt.

So lets talk about your tune to get you to what you want.

 

[glowryder]

i think he needs to address what he has for suspension, clutch and trans, other wise tuning what he has now, would be an exercise in dyno-queenism. If thats what he really wants then, build the head, get some cams, and get your self some squirt.

 

[FRslimmyjim]

I have tires and everything. I just need to do the springs. I'm getting the megaquirt 3 with the expansion board. I going to get 880cc injectors and I have to get a innovate wide band ### people say that works beat. How much boost do you guys think I will need to hit 400+? The compression is 8.6-1 and its bored .20 over.

 

[jayson427]

you will need a good tuner shop and dyno. you can get ms and everything you need but you need someone that knows about turbo'd cars so you can actually get all the horse power out of your set up with out causing damage to the motor. you can crank the boost up all you want doesnt mean you will get max horse power or be efficient.

 

[grothe3297venge]

I have tires and everything. I just need to do the springs. I'm getting the megaquirt 3 with the expansion board. I going to get 880cc injectors and I have to get a innovate wide band ### people say that works beat. How much boost do you guys think I will need to hit 400+? The compression is 8.6-1 and its bored .20 over.

Not going to matter how much boost you run. You need to find a turbo that suites your needs by if it can flow enough to meet those needs. Not how much psi you need to hit 400+hp.

 

[glowryder]

"I have tires and everything. I just need to do the springs. I'm getting the megaquirt 3 with the expansion board. I going to get 880cc injectors and I have to get a innovate wide band ### people say that works beat. How much boost do you guys think I will need to hit 400+? The compression is 8.6-1 and its bored .20 over. "

Tires and everything? Like what exactly.. Springs...? No .. a coilover setup is much better suited, something like a Tein SS, where the dampeners are adjustable... Are you sure you 880s will work with MS3.. IE are the high or Low Z? do you know the dead time of them? Whats your trans (LSD?)and clutch?, All this because, while 400 is a respectable number.. it will mean nothing if you cant plant any of it.

"Not going to matter how much boost you run. You need to find a turbo that suites your needs by if it can flow enough to meet those needs. Not how much psi you need to hit 400+hp. " This is correct....

FRslimmyjiM.. What is your goal. I know , I know 400. but WHY.. are you trying to just have 400 Hp, or are you trying to GO FAST.. because.. throwing HP at it isnt going to help you if you dont know where you currently stand..IE pass times etc..

 

[FRslimmyjim]

I am trying to go fast haha. I have a south bend clutch I forget what stage but I know it will hold 650 without issues. I specifically talked to them about that. I know I need to work on the suspension and putting the power on the ground but this isn't a project that is going to be done super fast. I want to get the motor done first so I am not takin the whole car on at once. This is my first build haha. Sorry if I am not going fast enough or the right way that you guys think but this is the way it works for me. That's why I have another car to drive. I will lower the car but not too much just to give it a nice stance with performance. I am getting a quaife LSD for it since I heard bad stuff about the obx ones. I just have to save to get the quaife since those are way more expensive than the obx ones. Does it make a huge difference if I go with a megasquirt 3 or 2? The 880 injectors are compatite with the megasquirt 3. I don't remember if they are high or low but I have checked that they will work. Also thanks guys for all the help you guys are awesome!

 

[LandSpeed-DSM]

What turbo do you actually have?

 

[Archer Fabrications]

Hey guys,
I have a newly built bottom end in my 420a. Its 8.6-1 and i have a 72mm precision turbo and i am looking for more horsepower.

Well considering he "has" a "72mm" he can run probably like 10-15 psi for 400hp, but we need pix or you dont have any such turbo. If you have that large of a turbo you should probably sell it if you are only having goals of 400hp.
Good luck this thread is full of BS.

Let me ask this op. what were you making previously that you want more power, and on what turbo? Lol this is a run before you can walk thread. If your car was stock and your throwing a big turbo on. I wish you good luck in your build. And now i exit.

 

[twicks69]

I am trying to go fast haha. I have a south bend clutch I forget what stage but I know it will hold 650 without issues. I specifically talked to them about that. I know I need to work on the suspension and putting the power on the ground but this isn't a project that is going to be done super fast. I want to get the motor done first so I am not takin the whole car on at once. This is my first build haha. Sorry if I am not going fast enough or the right way that you guys think but this is the way it works for me. That's why I have another car to drive. I will lower the car but not too much just to give it a nice stance with performance. I am getting a quaife LSD for it since I heard bad stuff about the obx ones. I just have to save to get the quaife since those are way more expensive than the obx ones. Does it make a huge difference if I go with a megasquirt 3 or 2? The 880 injectors are compatite with the megasquirt 3. I don't remember if they are high or low but I have checked that they will work. Also thanks guys for all the help you guys are awesome!

Which specific south bend clutch is it? Modular or non-modular? What material and hub type?? A part number? What you paid for it? Something.

You really need to be giving accurate details otherwise it will not help us one bit.

Same goes for the turbo, pictures, compressor/turbine inducer and exducer measurements, inlet size, hose outlet size, turbine housing flange and discharge size?

 

[glowryder]

dont worry guys.. because all 880s work with MS .. them being 880s has NO bearing on if they work or dont work with MS. its clear your over your head.

1, were not telling what we "THINK' is the best path for your project.. most of us know.. by being in your shoes once and reflecting back on how we could have, saved money, or done better.. If you want to to wast time and money by blazing you own way, down the Typical noob path, by all means..

880s will work with ms1,2 and 3.. so again.. thats not the factor that makes it work or not.. you need details about the injector type and impedance, as it will drive the settings configuration youll need to input into MS..

Your goal of going fast is going to flat out fail. You need more money in the traction parts. A well rounded 250hp 420a will blow the doors off your traction less 400 hp car. going fast is not just a function of power.. but then again. your not listening to me. At least you got the right brand of clutch.

GL.

 

[LandSpeed-DSM]

You are being very generous in humoring him on the 400whp bit.. lets ASSume the bottom end could support a 72mm turbo for a second.. no where is there any mention of head-work to allow for a cam that would use a turbo that size.

On an 8.6:1 2.0, that thing will have just begun to light off, make some appreciable boost and move some air about ~500rpm before redline, where the cam is well beyond falling off already. Whether its a Borg/Holset/PTE/Garrett unit, all of the above would be T4 footprint with a healthy size turbine wheel and housing..

I'm expecting 3rd gear to see 15psi with my 71mm in the 5.5-6k neighborhood and maybe hit my target boost of upper 30's - low 40s by 6.5k.. only difference is I am going to try and ride it out till 10-10.5k and actually get some use from of it.

 

[2gnt]

Eclipse/Avenger 2.0 Head Stock flow numbers!! - SRT Forums - SRT4, SRT6, SRT8, SRT10 & Dodge Forum

http://www.dsmtuners.com/forums/cylinder-head-short-block/170275-4g63-cylinder-head-flow-bench-results.html

I don't know anything about this subject but, I figured I'd share some info on this, maybe someone can tell me what those numbers mean.

 

[VelocitàPaola]

Please stay on topic guys, and please obey the forum rules:

http://www.dsmtuners.com/forums/420...-read-before-you-post-420a-forums-warned.html

I deleted a few posts, but I'll have to dispense infractions next time.

 

[99 gs iowa]

Swapping out the 420a head for an evo8 head wont happen, and if it did it wouldnt be an upgrade by any means.

And 400hp is way more than you should be putting down without suspension set up and an lsd set up, i was putting down in the ballpark of 230 last season and wasnt even able to use it all off the line, horsepower is only one of the numbers in a very big recipe