Turbo on stock 420a block?

[95eclispe]

Ok so i have a 420a and havent done anything to the head or block yet (no rebuild,overbore,and still running on stock rods,studs,pistons) i know you can run a turbo on these stock but does anyone know the max psi this can be done at before pushing the block?

 

[LarryJoe]

It's not about how much psi, it's about how much power can it hold. And typically, from what I've heard, it's not much. I'm sure you could get away with 8psi but you need a good tune. Most of it comes down to a good safe tune. I think what most 420A guys use is megasquirt. Just search the forums at others peoples builds to help you out.

 

[95eclispe]

It's not about how much psi, it's about how much power can it hold. And typically, from what I've heard, it's not much. I'm sure you could get away with 8psi but you need a good tune. Most of it comes down to a good safe tune. I think what most 420A guys use is megasquirt. Just search the forums at others peoples builds to help you out.

well with tuning involved can you tune the stock ecu? I would think not. I know they have stand alones for 420a's but if i can tune the stock to about 6-7 psi and see how it handles

 

[LarryJoe]

I don't think the factory ECU's are flashable. You'd almost have to go megasquirt. You could also go wideband route with an SAFC2. The only problem with that is you can't control timing. Which will probably need to be retarded to avoid knock.

 

[serrilion]

and saying 6-7psi or even 8 is pointless with out what type of turbo you want to be using... an 16G or 18G is going to move a ton more air than the stock one.... also something to keep in mind

 

[95eclispe]

well i was just going to go with a t3/t4...

 

[GSTurbo1]

Don't do it without head studs, and a good head gasket, trust me. My car has had over 5k in engine work and stand alone management, just don't do it. Keep it as a dd, and get a gst that is already turbo'd for a weekend warrior.

 

[boost97gst]

and saying 6-7psi or even 8 is pointless with out what type of turbo you want to be using... an 16G or 18G is going to move a ton more air than the stock one.... also something to keep in mind

BINGO.. Good point, glad someone mentioned

 

[fierosail]

Don't do it without head studs, and a good head gasket, trust me. My car has had over 5k in engine work and stand alone management, just don't do it. Keep it as a dd, and get a gst that is already turbo'd for a weekend warrior.

i like that idea best

 

[jayson427]

You can run 5-6 psi safely but your taking a chance. The first thing that will go is the rods in most cases, then you will have to get a new block. The only upgradable ecu you can get is an af/x but you have to have a 5speed. most guys go with megasquirt but its not the easiest thing to tune if you don't know about it. Theres tons of info on this site about your topic

 

[MikeT1982]

In college I had a friend with a dohc neon, similar motor to 420a or same. Very nice motor, I had a neon too. He did pretty aggressive Crower cams, Modern Performance PCM, long tube headers, intake and full catless exhaust and man was it a snappy ride it MOVED. It did low 14's all motor and didn't have the lag of my GST with a Hahn 20G (not surprising ). It pulled higher rpms exactly like an RSX type S I once owned. Very nice and fun. Maybe all motor would be a fun route for you, I'm by no means expert just describing a nice setup. Oh I almost forgot it had a NASTY cam lope at idle, I loved that, I wish my GST was cammed.

 

[mustracetsi]

going turbo you taking high change on the motor. also the miles on the motor can vary the life of the motor when you slap a turbo. 6 psi is safe zone others may say 8. make sure you get all the things for it tho. dont really need tune. most get a 250 walbaro fuel pump a 12:l fpr, injectors, dsm missing link or 1 bar map sensor. exhuast ect...... you can build the block and arp stud it and you can really get boost out of it without doing the block.

 

[punxnotdead185]

My 99 neon R/T blew the head gasket at only 6 psi and that's a 420a also

 

[95eclispe]

ok i guess ill hold off on turboing it right away and build it up for turbo. im really just anxious to slap a turbo on it and go seeing every other n/t w/turbo on here....

 

[96_killer]

Dude research Here

 

[serrilion]

BINGO.. Good point, glad someone mentioned

Welcome! I learned the hard way.... 14B vs 35R on prelude = BOOM!

 

[jayson427]

and saying 6-7psi or even 8 is pointless with out what type of turbo you want to be using... an 16G or 18G is going to move a ton more air than the stock one.... also something to keep in mind

Stock one? Its not a 4g63 its a 420a n/a I know what you mean but he wants to "slap" a turbo on a n/a motor and drive it. Which is never the best thing to do without doing maintenance and knowing your goals or budget.

 

[grothe3297venge]

I don't think the factory ECU's are flashable. You'd almost have to go megasquirt. You could also go wideband route with an SAFC2. The only problem with that is you can't control timing. Which will probably need to be retarded to avoid knock.

Can't use an SAFC2 on a 420A - http://www.dsmtuners.com/forums/420a-turbo-conversion/440860-safc-2-turbo-420a.html

Op - do a compression check, make sure everything is mechanically sound (timings on, water and oil pump etc), if everything checks out, go for it if you have all the supporting mods. Megasquirt be the obvious best tuning solution for our 420a's, but the FMU has been used multiple times until you can get MS.

going turbo you taking high change on the motor. also the miles on the motor can vary the life of the motor when you slap a turbo. 6 psi is safe zone others may say 8. make sure you get all the things for it tho. dont really need tune. most get a 250 walbaro fuel pump a 12:l fpr, injectors, dsm missing link or 1 bar map sensor. exhuast ect...... you can build the block and arp stud it and you can really get boost out of it without doing the block.

Close.. WTF

First off, 255 walbro Fuel pump, 12:1 vortech FMU or SFMU (need bigger injectors this route not with FMU only) personally would go missing link and FCD (safety measure since map sensor isn't supposed to see boost **1 bar map sensor won't work on our cars..**)

This is basically what you need, not trying to bash this dude since he was partially correct, but I don't think he's ever owned a platform with a 420a. This is also for a starting point, most would build the block then try to get 350-400hp from there, with what I said, you'll be lucky to get 220hp with a stock block at 8-10psi MAX! Good luck!

 

[sciondan]

With a t3/t4 I would say no more than 6lbs on a stock motor and that's with a good intercooler.

 

[95eclispe]

realy just wanted some opinions before i go two different routes. I will build the block up first then go from there.

 

[95VENG]

Im going to be putting a lil snail on my lil 420a as well, in the process of build as we speak. planning on running a 57-60trim on 8psi. Going to be running arp head bolts torqued to 100ftlbs with the 3ply steel gasket, stock cams stock springs with 12:1 FMU and adjustible fpr, Walbro 255lph pump, 312cc injectors. ill post up when i finish but if you are on a budget and want to still keep it as a dd i hear this is the simplest way to go. as for map sensor, youl want to go with a 2 bar map sensor. this will help with measuring boost. Did this with my silverado so dont see why it wouldnt work for this

 

[grothe3297venge]

Im going to be putting a lil snail on my lil 420a as well, in the process of build as we speak. planning on running a 57-60trim on 8psi. Going to be running arp head bolts torqued to 100ftlbs with the 3ply steel gasket, stock cams stock springs with 12:1 FMU and adjustible fpr, Walbro 255lph pump, 312cc injectors. ill post up when i finish but if you are on a budget and want to still keep it as a dd i hear this is the simplest way to go. as for map sensor, youl want to go with a 2 bar map sensor. this will help with measuring boost. Did this with my silverado so dont see why it wouldnt work for this

Let me know how it goes with that "2 bar map sensor." Like i stated, most use a missing link or FCD to prevent seeing any positive pressure but like i said, let me know how it goes!

 

[PsYcHoMaNtYsS]

from what i've been reading our motors have very durable heads, most people sugg doing bottom end work first, rods pistons and yes a set of reusable head bolts. and eventually up the line they say a bigger fuel pump

 

[95eclispe]

well honestly im in no rush to boost betteroff i do it right the first time! then having someone saying i told you so when im posting up another thrown on help with bent valves or thrown rod. IM going to build the block since i have a spare i can build that one up while i use my car as a DD so its not down while its being built. I can do the fpr and fuel pump ,injectors and map once thats done.