I would use ones specific to the 420a but its super hard to find them. I just read in a forum that these springs would work so I wanted to make sure they would! What type of valvetrain are you running in your 420a?

So i checked the link bullettdsm and that spring set also includes retainers! Do you know of any valves that work with those retainers that would also fit a 420A head? Cause it seems that most spring sets come with retainers and i dont want them to go to waste.

So the question is! will these springs work in my 420a? BRIAN CROWER VALVE SPRINGS & RETAINERS EVO 8 9 DSM 4G63 : eBay Motors (item 300392731539 end time Mar-03-10 08:12:51 PST)

well she ain't knocking anymore! Just slow and sluggish! ( crappy ) as some would say! I also just replaced the fuel filter plugs and wires. So I ruled that out, any suggestions?

Thank you I'll do that and post tomorrow to let ya'll know! Thanks again

Okay I'll get one tomorrow! What's average cost on both do you know?

Where's the knock sensor located? And I also seen that my o2 sensor is broke off could that make it sluggish or what's up?

Okay so I took the valve cover off to see if it was a stuck rocker arm and it was! I also did an oil change and didn't find any metal flakes, so when I started it the knock went away. But its still sluggish when I drive it?! Wtf

Is the girdle right there after I take the oil pan off?

Yes! All the way up to 3000 rpms. Then it gets kinda smooth but loud knocking!

Thank you that sounds like it'll be great advice! I will try that and post tomorrow! But if it doesn't get quiter am I looking at valves then? And how can I check those without removing the head?

Okay so I did a high rev burnout and a couple days later my car was knocking! I don't know if its the valves or bearings? I'm going to to drain the oil in the morning to see if there's any metal flakes, if there is can I check the bearings without taking out the engine? If there isn't any flakes...

So i need help diagnosing this problem before i tear into the engine. I have a 96 gs 5 speed that has a knocking only when i give it gas and slow acceleration until i hit the 3000 rpm range! any ideas on what is going on? any opinions help... thanks

it does sound really raspy and i dont like it! i want a more deep sound but im rebuilding my engine for turbo so any info on exhaust for that?

OK thanks for the info guys appreciate it a lot!!!

well i didn't know that it wasn't that much work? I will try doing this to find out myself if i like it! but still no answer on the power increase at all??

I suppose i could do that but i don't want to go through all that work to find out i don't like it!!! ANY info on power increases when doing these things?

any pics of your engine bay? and is it worth it to not have p/s?

Okay so does eliminating the a/c and p/s give any WHP or just Crank HP? And how much does it give? Is it worth eliminating? Any info or opinions would be great!!

I will add video when i do this! i will be doing this work come Monday when my parts store is opened.But which vacuum hose would be a good one to use? and what is gonna happen when i get it hooked up, what do i look for? thanks

how do i check vaccuum readings?

Well i'm pulling my engine next week, i'm just gonna start doing my build now! But i still wanna know what it is and learn to fix it! so thanks for the info fellas i appreciate it a lot.

so i can stay with stock internals and hit 250hp?! and what about the slight knocking? what do i do to diagnose the problem and how to go about fixing it? i dont want to assume its one thing and replace that part and find out its another prob.

its a light tink tink sound not deep! and it runs perfect but slow acceleration from 2000 to 4000 rpms.

Okay so i think i bent a valve cause i have a knock! Now should i rebuild the entire engine so i can boost to about 300 hp? or should i just rebuild the heads to boost and get 300 hp?

all i know is i put an ebay headers back exhaust with a test pipe on my n/t and now my car is knocking!

thanks for the info! so as for my knocking i guess i'll just replace the valves and do a tune up! and buy a GSX this winter! thanks again for the help.

Okay i've been trying to figure this out for a week now! i posted a thread last night about it and NO HELP.... I dont want to go turbo i just want a 250hp to 300hp daily driver.. is this possible and where do i start to do this? thank you for any info!!!:thumb:

So where should i start to build all motor and then eventually go turbo? what compression pistons should i use? if i put 8.8:1 in the block can i drive all motor with those or are they just for turbo?

Okay i've been trying to figure this out for a week now! i posted a thread last night about it and NO HELP.... I dont want to go turbo i just want a 250hp to 300hp daily driver.. is this possible and where do i start to do this? thank you for any info!!!:thumb:

so what i've learned so far is 140hp is stock and you cant make 250 hp with upgraded internals and no turbo? So obviously i'm gonna be spending at least 3 grand more to make an extra 100hp from stock! what tips can u give to make 200 without turbo?

so if i go turbo dont i have to build the internals any ways? and what kit out there can i get to start the build and whats the cost?

so is that the highest i can get my 420a for HP? and if it is then i guess i should go turbo!

I dont want to sell my n/t! i plan on getting a gsx this winter!!!!!! i just want to know what is the most HP i can get outta my 420a by building it up? so i know if its worth it for me to do so!!!!!!! thanx

The question was whats the most HP i can get if i do a full build all motor? I plan on boreing over .20 with 10.10:1 wiseco pistons and eagle rods! what kinda HP am i gonna get with those? whats my stock compression now? and i am doing FULL build starting with the block and going up!

thanks guys but i just want a dd with about 250 to 300 hp with no turbo. what route should i take?

Okay guys i've been looking around tech to find the answer... BUT NO luck. I'm gonna rebuild my engine cause of a bad valve and i want to know if i should go all motor/nitrous OR turbo? question is whats the max horse power i can get outta my 420A??? thanks fellas!

well my plan any ways was to build an all motor/nitrous daily driver! So i guess im starting a little earlier than i thought i was gonna. so i guess my first question will get answered later after i do my rebuild. where can i post pictures and thread about my project when i start?

okay im going to get some pics of the ebay exhaust. everything is tightened to spec and theres no leaks in the intake or exhaust! now i have an even bigger problem and this is it, now i have a knock. im guessing its a bent valve or lifter??? what do i do??

its a header back! and what's a bov? sorry im new to this.

i put on an ebay air intake and exhaust and now my car doesnt seem to have as much acceleration as before! any suggestions as of what could be happening?

well thank u very much justinhill98gst but i HAVE TRIED otherwise i wouldn't have posted this question.... The reason i do ask is i can get a 4g64 engine for 200 bucks and would like to build it up over the next couple of months but if it's cheaper to stroke my 420a then i guess i will do that...

can i put a 4g64 engine in a n/t 95 eclipse? if so how hard is it and how costly?:confused:

Dudes you all are great advice givers so i appreciate all the help!!!!!:hellyeah::hellyeah:And also thanks for the parts list in the pm box! So i haven't ever done a build but i have a 420a on an engine stand in my kitchen and i'm ripping it apart to find it has a spun bearing... So what...

you lucky son of a! i'll buy them for $400

Thank you thats is what i was looking for! Some good advice if i might say so. And yes i'm trying to get my hands on a used 420a so i can take my time and build myself. What do you suggest for pistons and rods? what compression should i go with? and what about valves and springs and cams? thank...

i'm talking about a 1k a month for the next 7 months so i'll have about 7k invested i just need parts list like cams, intake,turbo,pistons,crank,rods,valves,springs.etc.......