Home / Toyota Supra Forums

Go Back   Toyota Supra Forums! Join the Supra forum! > Performance, Modification, and Maintenance Forums - for generation specific discussions > MKIII Supra

Reply
 
Thread Tools Display Modes
Old 03-23-2007, 07:02 PM   #1
Supraman
Intake
 
Join Date: Dec 2004
Location: Idaho
Posts: 32
Supraman is on a distinguished road
Default Spark plug gap/loss of power

I was hoping someone could tell me what gap my plugs should be when Im running 17-18 psi boost. Ive been having an issue with acceleration it seems to want to cut out from 3500 rpm up to 6000. Ive got all the proper equipment(walbro fuel pump, fuel pressure reg. @50 PSI, upgraded ct-26 turbo,
550 injectors, larger exhaust, Lexus AFM, metal headgasket). I did go to a local parts store and the guy told me the more you increase boost the smaller your gap should be or you will foul your plugs. Can anybody tell me if this is true? Also When I drove it today i noticed when I reached 15 psi thats when I noticed the cloud of black smoke following me and the loss of power. If anyone has experience this before let me know.

Last edited by Supraman; 03-23-2007 at 11:31 PM.
Supraman is offline   Reply With Quote
Old 03-24-2007, 02:37 AM   #2
kwnate
SP58GT
 
Join Date: Jul 2005
Location: USA
Posts: 633
kwnate is on a distinguished road
Default

Your fuel pressure is too high, that black smoke is a dead give away for running way too rich. Your base fuel pressure (with the vac line disconnected) should be set in the 30's and should increase the fp 1psi for each 1psi of boost. Running really rich like that will kill your power and your plugs.
__________________
Nate



Last edited by kwnate; 03-24-2007 at 02:40 AM.
kwnate is offline   Reply With Quote
Old 03-24-2007, 05:05 PM   #3
Supraman
Intake
 
Join Date: Dec 2004
Location: Idaho
Posts: 32
Supraman is on a distinguished road
Default

Thanks for the info Ill give it a try.
Supraman is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Spark plug wires Quik Q carfanatic89 MKIII Supra 2 05-22-2008 01:46 PM
Broken spark plug! HELP! supraman121 MKIII Supra 2 10-02-2006 08:40 PM
new mk3 owner, spark plug galley full of oil!???? katillidie MKIII Supra 6 03-24-2006 05:09 AM
spark plug wires kewlcoconut MKIII Supra 2 03-19-2006 07:45 AM
Spark plug leads for 1g ekoston69 MKIII Supra 0 12-30-2005 03:18 AM


All times are GMT. The time now is 02:44 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

1986



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87