Shimming the Wastegate

Reeves · 09-13-2006, 09:16 PM

So you don't have to worry about fuel untill after 12-13 psi? What about the octane? Whats the psi limit on 91 octane?

A manual boost controller will allow me to go from stock psi and up right, as opposed to like 10 psi and up? Just curious because I want to get a manual boost controller but don't want to go above 8 psi untill I get a new boost gauge.

Isphius · 09-14-2006, 02:19 AM

Always use the best gas you can find. 93 or 94. Or more if its available. The car is safe on its own, It will fuel cut before you can break it, or well overload the injectors. Thats why its there. But i wouldnt trust a stock HG. ARP studs and a new toyota hg(nothing else will do besides metal) at about 100 ft lbs will run 93 octane and boost to fuel cut just fine. And yes, A manual boost controller will go up from your factory setting, so your good there. I would say get the gauge first.

Reeves · 09-14-2006, 10:22 AM

I already have a hks 2.0 mm bead metal headgasket with ARP studs, so im good there. And I already ordered the manual boost controller.. Ill just be real carefull untill I get a gauge. Worst that can happen is ill hit fuel cut off, right? Oh and 91 octane is all that is available. Is there any way to get higher octane?

Also how do I go about tuning my car so that it doesnt run too lean or too rich? Am I going to have to worry about that or will my cars ECU take car of that on it's own? Im gonna get a air/fuel mixture gauge when I get my boost gauge to make sure I don't get the lean condition, but if it were to run lean how would I change that?? Bigger injectors and lexus AFM?

Isphius · 09-14-2006, 02:43 PM

Get an apexi safc-II. It lets you change your fuel curves based on rpm. And the 91 octane shouod be ok for like 10 or 11 psi, But dont push it too hard. The lex afm/550s will help some with fuel cut, But there main purpose is so you can add more fuel. Eventually what you need is the lex afm, injectors, a greddy FCD, and an safc-II. But then you might as wel start modding everything else, etc. Its a neverending money pit lol.

Reeves · 09-14-2006, 08:20 PM

Im not worried about fuel cut since I don't plan on going any more than 11 or 12 psi for quite a long while, if ever. Don't push what too hard? The psi or the engine? And what is an FCD?

Im going to stop at 11-12 psi, full exhaust, intake, electric fan, and upper IC pipe + BoV. Of course ill do the safc thing and maybe FCD (once I figure out what it is =D) and alot of other minor things. Don't really want to go with bigger injectors and lexus AFM for awhile though. I should be okay, right? Once im done with those mods im going to be working on my suspension as currently my car sways like a boat.

Supra2NR · 09-15-2006, 02:20 AM

Quote:

The fuel system will be fine untill you hit fuel cut(11-12+, dependant on ambient conditions), and the stock ct26 can take about 12 or 13 psi.

thats what i really wanted to know
i jus dont wanna run way too lean and have the same result the second time

but i'll probly stick to boostin at about 11 psi then so it'll be safe

Isphius · 09-15-2006, 03:35 AM

youll hit fuel cut at 11 psi on hot days.

09-14-2006, 02:19 AM	#2
Isphius 500whp yet? Join Date: Nov 2005 Location: Long branch, NJ Posts: 1,006	Always use the best gas you can find. 93 or 94. Or more if its available. The car is safe on its own, It will fuel cut before you can break it, or well overload the injectors. Thats why its there. But i wouldnt trust a stock HG. ARP studs and a new toyota hg(nothing else will do besides metal) at about 100 ft lbs will run 93 octane and boost to fuel cut just fine. And yes, A manual boost controller will go up from your factory setting, so your good there. I would say get the gauge first. __________________ Yay the supra assistant is gone!!! WEEE!!

09-14-2006, 02:43 PM	#4
Isphius 500whp yet? Join Date: Nov 2005 Location: Long branch, NJ Posts: 1,006	Get an apexi safc-II. It lets you change your fuel curves based on rpm. And the 91 octane shouod be ok for like 10 or 11 psi, But dont push it too hard. The lex afm/550s will help some with fuel cut, But there main purpose is so you can add more fuel. Eventually what you need is the lex afm, injectors, a greddy FCD, and an safc-II. But then you might as wel start modding everything else, etc. Its a neverending money pit lol. __________________ Yay the supra assistant is gone!!! WEEE!!

09-15-2006, 03:35 AM	#7
Isphius 500whp yet? Join Date: Nov 2005 Location: Long branch, NJ Posts: 1,006	youll hit fuel cut at 11 psi on hot days. __________________ Yay the supra assistant is gone!!! WEEE!!

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09-13-2006, 09:16 PM	#1
Reeves 3" Exhaust Join Date: Sep 2005 Location: San Diego Posts: 98	So you don't have to worry about fuel untill after 12-13 psi? What about the octane? Whats the psi limit on 91 octane? A manual boost controller will allow me to go from stock psi and up right, as opposed to like 10 psi and up? Just curious because I want to get a manual boost controller but don't want to go above 8 psi untill I get a new boost gauge.

09-14-2006, 10:22 AM	#3
Reeves 3" Exhaust Join Date: Sep 2005 Location: San Diego Posts: 98	I already have a hks 2.0 mm bead metal headgasket with ARP studs, so im good there. And I already ordered the manual boost controller.. Ill just be real carefull untill I get a gauge. Worst that can happen is ill hit fuel cut off, right? Oh and 91 octane is all that is available. Is there any way to get higher octane? Also how do I go about tuning my car so that it doesnt run too lean or too rich? Am I going to have to worry about that or will my cars ECU take car of that on it's own? Im gonna get a air/fuel mixture gauge when I get my boost gauge to make sure I don't get the lean condition, but if it were to run lean how would I change that?? Bigger injectors and lexus AFM?

09-14-2006, 08:20 PM	#5
Reeves 3" Exhaust Join Date: Sep 2005 Location: San Diego Posts: 98	Im not worried about fuel cut since I don't plan on going any more than 11 or 12 psi for quite a long while, if ever. Don't push what too hard? The psi or the engine? And what is an FCD? Im going to stop at 11-12 psi, full exhaust, intake, electric fan, and upper IC pipe + BoV. Of course ill do the safc thing and maybe FCD (once I figure out what it is =D) and alot of other minor things. Don't really want to go with bigger injectors and lexus AFM for awhile though. I should be okay, right? Once im done with those mods im going to be working on my suspension as currently my car sways like a boat.