Shimming the Wastegate

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.

Reeves · 09-15-2006, 06:55 AM

Quote:

Originally Posted by Isphius

youll hit fuel cut at 11 psi on hot days.

Doesn't it depend on each individual car? Like doesnt it vary from supra to supra a tiny bit?

Isphius · 09-15-2006, 05:24 PM

Yes, it varies by car, temperature, humidity, how hot the car is, how dirty your intercooler is, etc. But at 11 psi, if its pretty warm (>80) pretty good chance that youll hit fuel cut.

Spudboy · 09-15-2006, 05:31 PM

Reeves...I'm going the other way. Did the suspension first, will go for more power next so I'll trade ideas and experience.

I just installed TEIN Flex coilovers. Had the car on track after TEIN last week. HUGE improvement in body roll and handling. These TEIN are very adjustable so you can really dial in your set-up. (I will be putting on proper rubber before next track day, probably Toyo RA1's but open to suggestions)

If you get the TEIN let me know before you install and I'll share a few tips.

Also...while I was on track my car got very very hot after about 6 to 8 hot laps. (it was about 95 out) I have a recent new head gasket so I don't expect leaks there. Any suggestions anyone?

1988 Turbo Supra. No engine mods. 69k original miles.

09-14-2006, 02:43 PM	#2
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	#5
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!!

09-15-2006, 05:24 PM	#7
Isphius 500whp yet? Join Date: Nov 2005 Location: Long branch, NJ Posts: 1,006	Yes, it varies by car, temperature, humidity, how hot the car is, how dirty your intercooler is, etc. But at 11 psi, if its pretty warm (>80) pretty good chance that youll hit fuel cut. __________________ Yay the supra assistant is gone!!! WEEE!!

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09-14-2006, 10:22 AM	#1
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	#3
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.

09-15-2006, 05:31 PM	#8
Spudboy 3" Exhaust Join Date: May 2006 Location: So. Cal Mountains Posts: 178	Reeves...I'm going the other way. Did the suspension first, will go for more power next so I'll trade ideas and experience. I just installed TEIN Flex coilovers. Had the car on track after TEIN last week. HUGE improvement in body roll and handling. These TEIN are very adjustable so you can really dial in your set-up. (I will be putting on proper rubber before next track day, probably Toyo RA1's but open to suggestions) If you get the TEIN let me know before you install and I'll share a few tips. Also...while I was on track my car got very very hot after about 6 to 8 hot laps. (it was about 95 out) I have a recent new head gasket so I don't expect leaks there. Any suggestions anyone? 1988 Turbo Supra. No engine mods. 69k original miles.