420a build help

[skemp45]

ok i have a 1995 eclipse rs and i bent a rod so i took out the engine and i have everything down to bear metal and im going to do a full build and i mean everything. so my question is this what am i going to have to do as far as


tuneing? because im also going to do a turbo setup im going to run a 16g

fuel system?


im going to bore it out .040 over so what all will i have to change if i do that

what kind of valves and springs should i get?

im sure i will have more questions to come but for now if i could get thoes answerd that would be great guys!!!!

oh yea and guys i was looking at a set of wesico pistons and eagle rods compression 8:8:1 that should be good right for the turbo a lower compression like that???

 

[dsm'r sk1mp]

last i checked and i may be like one bit off but the compression in a stock 4g63 hits 8:7:1 so your compression set up bored out may be ok but i have never done so yet... for those brands of parts you listed i believe are some of the best you can get.. i just did some research for you and those are some pretty well talked on parts... so i hope my 0.2 cents helped

 

[420a_turbo]

You will need rods, rings and pistons to go with the bore. You will take the rods/pistons to the machine shop. The rods are not for the bore, but you will need both when you go to the shop. The pistons/rings are the only "Bore" specific parts. You should consider having the Crank polished at the least. I always have mine done anytime I have the rotary assemble pulled apart.

As far as the Valvetrain you can use the lifters/sash adjusters from the turbo pt cruiser, they are alot better then our OEM but a direct swap. I would suggest getting the head decked while its in there. Your going to want it as straight as possible for the best seal, so get it decked. You should buy OEM timing belt components, such as the tensioner/pulleys. I use a Napa Water pump, never had problems..

The brands of parts you listed are perfect. 8:8.1 is exactly what you want for a mild-strong build. Some guys go 10:5.1 when they are doing Higher-output. To further help give you advice, you need to talk more about your goals.

As far as the fuel system you have several options. I use SRT-4 injectors, a walbro 255, a FMU w/10:1 disk and OEM rail. I dont have to use a missing link on my '95 but my '98 needs one. Others use portfueler/Megasquirt standalone, larger injectors etc. This area really depends on your goals, and the money you wanna spend to get there.

A couple words of wisdom on your build. Keep your stock cams unless your power goals exceed 500HP. Our heads were designed by Lotus, and kick ass! Research sealing the head. Our cylinder heads are prone to leaking a tad bit of oil. Dont go cheap on any important parts: Oil pump, front/rear main seals, bearings, Tensioner, and T-belt. Torque the timing down before dropping the motor, so you know you accurately torqued the tensioner(its tricky when the motor is in the car, and over tightening is the leading cause of an exploding re-built motor). Use Blue loctite on every important bolt in the belt drives. Dont skimp out on the break in process. Baby that car for 500-1000 miles once running before ever hitting high boost. I dont boost the first 500 miles at all. Change the oil as recommended for the break in process, dont skimp! Torque everything in the head to spec, and I mean SPEC! Dont cheat, or use a cheap torque wrench either. DO IT RIGHT. Clean everything as you re-install. Paint your block after it gets hot-tanked, you will appreciate it later!

I think thats about it. There are a million other tips, but those to me are a couple of the most important. I have built 7 420a motors, and every single one fired on the first turn and didnt leak/burn. If you take your time and do it right you will be just fine!

 

[skemp45]

ok thanks guys so i planed on getting my intake and head ported and polished is that a good idea?

i also wanted to get my trubo cliped and polished?

what about cam gears?

and i canot find a forged crankshaft for the 420a should i just use my stock one and get it re machined and polished?

you guys are helping a ton thanks

im not worried to spend the extra money for the good stuff i was think for the full build and turbo and fuel around 8,000

 

[Diamondrev]

ok thanks guys so i planed on getting my intake and head ported and polished is that a good idea?

i also wanted to get my trubo cliped and polished?

what about cam gears?

and i canot find a forged crankshaft for the 420a should i just use my stock one and get it re machined and polished?

you guys are helping a ton thanks

im not worried to spend the extra money for the good stuff i was think for the full build and turbo and fuel around 8,000

Port and polish will be good and helpful. If you can, get the over-sized stainless steel valves to benefit from the port and polish.

Stock cam gears will work fine.

they only sell the Forged crankshaft for the stroker kit. get your stock crank machined and you will be fine.

 

[skemp45]

so im shooting for around 350-400hp
what size injectors should i go with?

what intake manifold will work the best?

stock cams and cam gears will work fine then?

what brand of oversized valves?

what turbo anifold will be best for my power needs if im running the evo3 16g turbo

i also want to know what im going to have to do to my transmisition to handle the power i bought a spec stage 3 clutch and a 8lb fidaniza flywheel

ok guys i have a huge question for you i orginialy planned on useing a 16g turbo but to me if im going to fully build my motor i should push it alittle harder than a 16 g what would be the best turbo for me to get i want around 350-400 hp and i want it to spool around 3200

 

[420a_turbo]

Q:so im shooting for around 350-400hp
what size injectors should i go with?

A: Depends on efficiency. You want your injectors to be performing at a peak 90% load for longevity. Well thats recommended anyways. Something in the ballpark of 660-750cc,(opinion related) google an injector calculator and figure it out from there. If you plan to run E85 then go 20% bigger yet. I believe the small 16g runs at a peak of 34lbs/hr and the big 16g runs at 36lbs/hr, un-modified-just thought I would throw that out there.

Q:what intake manifold will work the best?

A: Use your stocker if your only shooting for 350-400. You will want a larger TB and get it port-matched to the intake. I would also get the intake/exhaust manifold port-matched when you get the head ported and polished.

Q:stock cams and cam gears will work fine then?

A:Yes. I only use adjustable gears to cheat when setting the timing. Thats it. Timing is cake with regular gears, but after 4-5 times pulling shit apart I decided that would be easier. Its really not that great of a benefit.

Q:what brand of oversized valves?

A: There are alot of options here. I really like Crower as a company, but there are really too many to offer 1 stating they are better then another that will really
boil down to opinion. I believe the largest size you can get is only 1mm larger though. This wouldnt be on my to-do list if my goals where 350-400WHP.

Q:what turbo manifold will be best for my power needs if im running the evo3 16g turbo

A: I am pretty sure you are going to need a custom manifold. They sell an adapter to fit the 16g to a T3 manifold, but I dont believe in that. I think those are weak. Thats my opinion, so consider it an option if you want.

Q:i also want to know what im going to have to do to my transmisition to handle the power i bought a spec stage 3 clutch and a 8lb fidaniza flywheel

A: Break it first, then worry about that. The differential will need some attention, you are going to want a limited slip. There are several to pic from, and people argue all day long about which ones are better. I run a phantom LSD, and it seems people on this site have had bad luck with them. I have not, but Im not making rediculous power either. My tranny is holding just fine, 30k+ boosted miles on one(287.9WHP) and 40k+ on another(316.6WHP)

Qk guys i have a huge question for you i orginialy planned on useing a 16g turbo but to me if im going to fully build my motor i should push it alittle harder than a 16 g what would be the best turbo for me to get i want around 350-400 hp and i want it to spool around 3200

A: Not going to happen. Spool around 3200 and make 400WHP, nope not gonna happen. Maybe if you twincharge it-HA! The Super 16G will meet your power goals on the low end, ###### wont get anywhere near 400WHP though. Anything larger and you are going to have a track car, not a DD'able car. With that in mind, if you really wanted to go that big you will have to figure it out on your own. I dont give high HP advice to a novice
This forum is to get people started. I will gladly help anyone wanting to learn, well learn enough to get motivated. But having turbo custom cars takes commitment. You have to learn, to be wise. And in this scenario my friend, you have to crawl before you can walk

I edited your post and fitted my answers in there

 

[skemp45]

that helps out a ton well i decided to go with the evo 3 16g turbo which is getting ported and clipped, i also bought a venom intake manifold and a modren performance 60mm throttle body, i orderd my wesico pistions 8:8:1 and my eagle h beam rods. i orderd py crusier lifters and roller rockers, i also have an appoitment tuesday to get my head remachined and ported and polished, my block is being bored out .040 over and acid batched then powdercoated black. i orderd an walbro 255 fuel pump and a aeromotie fuel rail and a set of 750cc injectors, my crank is getting remachiend and polished, i got a set of crower 1mm over sized stainless steel valves and a set of crower springs and retainers. and that was a big enough bill for today sofar im excited but does this sound like a 400hp build to you guys or does it sound like a 250 hp build? i want to do everything i can now to help out in the long run

what kind of tuneing program should i get i was looking at the 420a megasquirt ems kit but im not a big fan but my big question this might be noobish but can i use dsm link ive just never seen it on a 420a??????? ### i need seriouse help with this whole tuneing and fuel system im super confused on what i have to do