Max safe boost? [Merged 10-6]

[Turbolaser]

Is it safe to do the boost contol solenoid mod on a stock 1G?

 

[Bud92gsx]

Because it would be completely useless since it's a 5 speed. It states it in the first post.

.

That reallly happened .. hold on

 

[DSM Chase]

Anything over 20psi you will probably start seeing knock on pump gas...

 

[turbobird14]

Thank god we have 93 octane readily available everywhere here! I already have the wideband installed and have a decent base tune down right now running only wastegate pressure. One thing I forgot to add was I have done a fuel pump rewire. I was going to shoot for 18psi, and i think that will be fun for a weekend warrior.

Rewire the fuel pump for now..But not a bad list of mods besides the ebay turbo.

Are you getting any boost creep btw?

Im only running wastegate pressure right now but i did a WOT 3rd gear pull and it didnt creep one bit.

 

[Cdc1221]

For the safety of your engine, I would keep it around 15 psi. EBay 16gs are unreliable at best, and pushing it any farther will most likely end in early death for it, and possibly the engine. Just my $.02.

 

[TalonBoi91]

If you have an eprom ecu, get a chip burnt, i know MY1GDSM on here does exu socketing and chip burning, he will burn a chip for your setup. That will give you a good base tune and then fine tune with afc and wideband.

 

[turbobird14]

I dont know if its an eprom ecu or not. I never checked. probably should have when I wired in the SAFC. was out tuning a little with it last night and I cant get enough fuel out of the 1g Rewired fuel pump... so ill be installing my wally this weekend. I really need to order the FuelLab AFPR kit just havent convinced myself to shell out another 200 bucks for it yet

 

[962ndgen]

Yeah dude that really did just happen

 

[AllGripNoSlipGSX]

Lmao bud92gsx!

 

[christurbodspyder]

I've been told you should run it at 15psi and with fine tuning with dsm link it's possible to push up to 350hp. that's what iv been told it seems possible.

 

[99ECLIPSEGSXDSM]

Dude! 9 years!?! 15 is the max. After that you'll be pushing hot air. You don't need to fine tune with the t25 because everything the t25 can put oh the stock ecu can compensate for

 

[Rock2610d]

I made the mistake of setting my T-25 boost to 15 psi. Three months later I found a bad EGR. Now my T-25 has some side to side play.

I think it can handle 15 psi but if you get a boost leak, say because of a bad EGR or BOV the turbo has to work really hard to get to 15 psi. That will make it go bad fast.

I strongly suggest 12 psi max.

 

[Bojangles465]

hey guys, im getting my laser ready here in a couple weeks, and i have a few questions. im running a 6 bolt in my 90 laser rs-t fwd, with an unsocketed ecu, an hks ssqv bov, big 16g, 2g maf, walbro 255 fuel pump, apexi turbo timer, unknown brand tubular manifold. i blew a head gasket a few months agi, so im having a spare head i have laying around machined(g4cs hyundai head) and throwing arp head studs,and a cometic mls hg on, and maybe some cams(272), with 3g lifters. my question is, with my setup, how much boost can i turn my mbc up to with it being safe, and if my turbo timer is acurate enough to check my afr, and make sure i dont run too lean. eventually im going to get aem uego, and an aeromotive fpr but i dont have the money right now. any help?

 

[pauleyman]

How about some fuel. With what you have listed the car shouldnt even run. Boost is not an absolute number. Air fuel ratio is and no your turbo timer wont help you. Do you have the proper surfaces to run an mls gasket?

 

[Archer Fabrications]

Your turbo timer isnt gonna do jack for your afr reading, it takes off your narrowband sensor and is in acurate, you need need need a wideband.

 

[Bojangles465]

thats what i figured. ill eventually get the fpr and a wide band. im gonna keep the boost where it is until i have tuning capabilities, and so far as the fuel, i have some injectors i might throw on to even it out. does anyone know if a g4cs head will work on a turbo 6 bolt block?

 

[AngelOfPassion]

If you can't dial in the injectors with tuning software you aren't going to get very far... my FIC 850's wouldn't even idle without me adjusting like crazy in ecmlink...

 

[99ECLIPSEGSXDSM]

I would also forget about the 272s until you have something to tune with also

 

[Gerg]

Here is a good thread to look at regarding the g4cs head and the head gasket you plan to run. I would stick with a composite gasket, mls is really hard to get to seal correctly unless you have the block decked as well.

http://www.dsmtuners.com/forums/newbie-forum/367335-choosing-headgasket-4g64-vs-g4cs-vs-4g63.html

 

[My1GLaser]

Your car is going to run horribly with the 2g MAS and stock injectors and nothing to tune with. You should either put the 1g MAS on until you have something to tune with or get an SAFC. Without a WB and a logger, you are tuning blindly.

Alternately, you could put some 550cc inj in there to mostly compensate for the 2g MAS, but it would still be best to have a way to tune the car!

 

[Bojangles465]

Here is a good thread to look at regarding the g4cs head and the head gasket you plan to run. I would stick with a composite gasket, mls is really hard to get to seal correctly unless you have the block decked as well.

http://www.dsmtuners.com/forums/newbie-forum/367335-choosing-headgasket-4g64-vs-g4cs-vs-4g63.html

ive read that thread several times but i cant quite find my answer... can i use the standard 85.5 hg with my stock block mand my hyundai head??

 

[Gerg]

ive read that thread several times but i cant quite find my answer... can i use the standard 85.5 hg with my stock block mand my hyundai head??

I would think that you would want a 86.5mm headgasket for the gasket to seal around the combustion chamber of your head. This is just my own thoughts though, and what makes most sense to me. Also in that thread it says that stock and felpro head gaskets are actually 86mm, when the stock 4g63 has a 85mm cylinder bore. Taking from that, I'm pretty sure a hg that is a little bigger then your stock cylinder bore but matches your head is better then a hg that matches your cylinder bore but is too big for your head.

 

[1997eclipse rs]

okay im buying my first gst its a 1997 its all stock injectors fuel pump all is stock but its running a 16 turbo the guy im buying it from says its on 17 pounds of boost which im pretty sure isnt safe withought some things? and if it isnt what would be safe?

 

[shakeandbake]

I would say that's on the edge of what the stock fuel system could handle. You'll probably be very close to fuel cut if you redline with that. You should be fine putting it down to 15 until you get your fuel system ready.

 

[1997eclipse rs]

swwet thankyou its an auto to sadly i need to get a m/t swap soon and then get everything else! i have a very stupid question that ill probably be getting laughed at...

but how do you turn your boost down im very new to turbos...

 

[shakeandbake]

If there's a boost controller connected to the turbo then that's it. Should be connected by 2 hoses one at the waste gate. If there isn't one then that's the first thing you should buy. Use the search to see what the setup looks like. And if you stay a/t you have no boost lag.