Max safe boost? [Merged 10-6]

[Turbolaser]

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

 

[nismo4life]

get a T25, then you don't have to worry because it will just creep to like 40 pounds haha.

 

[timloomis]

Yea youll need something to tune out that nt fpr or it will run rich.The 550cc hacked mas thing is when you put a 2g mas on a 1g,it pretty much runs so lean that 550s runs ok without an afc.I'll let you know more about the fpr,I might be overrunning it with my pump.

 

[nightspeed87]

i thought that hacking the mass fully on a 1g gives off pretty much the same effect as running a 2g mass?

 

[perley03]

all cars are different. get a logger to actually find out what is going on inside that engine, not just guess a safe boost level and go from there. slowly up the boost untill you start to get knock, then back it off 1psi or so until you dont get knock.

 

[nightspeed87]

well yea thats what I planned on doing anyways, I was just saying for reference...
I wasnt truely going to raise boost until I got a logger anyways.... But was just curious has anyone had my set up at one point of time and what was their max boost at pump gas octane ratings. But i guess your right theres too many variables to predict this.

 

[GVR4592]

Yep you got it, there are way too many variables. Now when somebody asks this same question tomorrow you can link them to this thread.

 

[DSM-Franek]

i have a fully stock JDM 6 bolt with a T28 ported exhaust mani and o2 housing.. full 3" straight pipe. walbro 255 fuel pump 660cc injectors 39psi fuel pressure.. big greddy front mount .. greddy type s blow off. hallman boost controller

what do you guys think a safe boost level is for street? track? im AWD

thanks alot!

 

[brute]

15psi. If you got fuel control (preferably DSM Link), you could take it as high as you can before it starts knocking. Get a logger and fuel control!

 

[Rice Over Wheat]

I think you should get the FP 17psi actuator for that T28 if you haven't already. The stock actuator is rated at 11psi and is shit.

 

[98evoIIIpwr]

I think your biggest concern outside of tuning the motor to handle boost is going to be the head lifting. Im sure if you got some ARP head studs and a better HG then you could push the limits. Otherwise I wouldnt recommend going over 18-20 psi. Basically after getting ARP hardware the only limiting factor is the tune.

 

[MaxPSITalon]

fuel cut is going to be a problem without an afc or dsm link. 15 psi is probably about the max. once you get an afc or preferably dsm link i would tune it up to 24 psi. of course, that depends on what turbo you have. with a T25 (stock) anything over 15 psi is pointless. in that case fuel cut wont be a problem (at 15 psi). check out

www.dsmchips.com

they are reasonably priced and there is so much you can do with the chips (eliminate fuel cut for example) this is great if you are on a tight budget... if u got some cash go with dsm link... its the best

i wouldnt change that actuator if you have a boost controller.

i would upgrade the turbo before running over 15 psi. i would recomend a big 16g.


good luck!

 

[DSM-Franek]

anyone know any good tuners in the northern NJ area? im a noob to the DSM scene

 

[90blacktsiawd]

I think your biggest concern outside of tuning the motor to handle boost is going to be the head lifting. Im sure if you got some ARP head studs and a better HG then you could push the limits. Otherwise I wouldnt recommend going over 18-20 psi.

NO!!!!!!!!!!!!!!!

This just isn't true. I'm currently running 22 psi on a DAILY basis out of my 50 trim. It's not until upwards of 25 psi that you may have to start worrying about the head studs stretching. Even then, there is no exact number they will stretch at. It also isn't very likely your going to turn the boost up just once and have them suddenly stretch on you.

Another thing, the stock mitsu composite headgasket has proven itself time and time again to handle alot of boost. There are several members here that are running 30+ psi with a stock headgasket and ARP head studs. Go talk to diambo4life about that.

 

[90blacktsiawd]

anyone know any good tuners in the northern NJ area? im a noob to the DSM scene

How far are you from Philly? There a dyno shop, Philly Dyno Works, that is pretty knowledgable on the subject. You might want to give them a call if their close enough.

 

[Rice Over Wheat]

Regarding the suggestion to "upgrade" to big 16G, why would he want to do that? It's not a pure bolt on which is the point of the T28, and only has a slight advantage in peak limit: 380whp (big 16G) vs 360 (T28). T28 is rated 550cfm, same as 16G. Not worth the trouble. If he wants a real upgrade he should skip the foreplay and go with something along the size of 20G.

 

[nightspeed87]

i have a fully stock JDM 6 bolt with a T28 ported exhaust mani and o2 housing.. full 3" straight pipe. walbro 255 fuel pump 660cc injectors 39psi fuel pressure.. big greddy front mount .. greddy type s blow off. hallman boost controller

what do you guys think a safe boost level is for street? track? im AWD

thanks alot!

You have fuel management for those 660s and that set up right? If not a logger and fuel management should be your first concern. Im going the chipped route instead of link www.dsmchips.com its suitable for my needs, maybe yours also? What yr is your car because if you have eprom you can do it? Are you a first gen or 2nd? And the t28 is a good turbo dont get me wrong, but I think im going for a 20g myself. T 28s are better on hondas who go turbo and etc. from my point of view, you can do a little better.

 

[DSM-Franek]

philly is about 2.5-3 hours from me

my car is a 1997 GSX with jdm 6 bolt im not even sure of exactly what it has computer wise done to it.. has an safc i bought it last sunday.. doesnt seem like it hesitates at all or hits fuel cut.. idles PERFECT and seems to run PERFECT.. when i got the car it was set to 20psi but i turned it down to 14

 

[iceman21221]

i have the t-28 also. it runs pretty good compared to a big16g. the 16g will have a little more top end then the t28, although the 16g is not an easy install on the 2g. i run about 20 psi daily with 650 injectors, SAFC, 255 fuel pump and a big greddy front mount.

 

[fourreGsixty3]

Iceman you NEED an AFPR for that 255.
Now for the OP.
There is www.turbotrix.com ...not sure how far they are from you, not sure if they have an AWD dyno to tune you on, or if they do tuning, but I have heard good things about them.
Since you have 660s, a S-AFC, a Walbro 255 fp, and an AFPR, I would say get a logger. Yes you have an EPROM chipped ECU (95 and on DSMs are EPROM chipped), so you could tune with the S-AFC, or buy DSMLink and a logger ( I recommend this one), or get a custom A/F ratio and timing chip from Jeff at www.dsmchips.com. Either way you go, you can turn the boost up in incriments of 2psi until you see knock, then back it down till you only see a max of 2 counts or less.

Dustin

 

[dalatinromeo]

Depending where you live you can contact Sean Ivey. You can google that name, and his website should pop up.

You can also check out turbocar.com/njdsm They're should be someone from you area who can help you out tuning.

 

[90blacktsiawd]

Yes you have an EPROM chipped ECU (95 and on DSMs are EPROM chipped)

No he doesn't. Unless someone swapped one in. ONLY 95's came with eproms from the factory. All other 2g's need to swap one in if they want to go with dsmlink or a reburned chip.

 

[fourreGsixty3]

Opps my bad on that one, I just took a look at the differences in ECUs and noticed the 95-96 mostly have EPROMs, and 97-99 dont, so you would need an EPROM ECU to run the DSMChips, or DSMLink. Great catch on that one.

Dustin

 

[90blacktsiawd]

No, only 95's came with eproms.

http://www.dsmlink.com/faq.html#eprom_ecu

 

[fourreGsixty3]

Man I couldn't be dumber today...I looked at this>>> http://www.dsmtuners.com/sub.php?page=1g2gcomparison, and I thought that it said 95-96 most...but its only 95. Man you got my ass covered on this subject thanks.

Dustin

 

[Rice Over Wheat]

You have fuel management for those 660s and that set up right? If not a logger and fuel management should be your first concern. Im going the chipped route instead of link www.dsmchips.com its suitable for my needs, maybe yours also? What yr is your car because if you have eprom you can do it? Are you a first gen or 2nd? And the t28 is a good turbo dont get me wrong, but I think im going for a 20g myself. T 28s are better on hondas who go turbo and etc. from my point of view, you can do a little better.

T28 is used in the S15 and corvette turbo kits. FP's big T28 produced a 11.82 @ 119.3 on a full weight 99 GSX. Hondas my ass.