Home / Toyota Supra Forums

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

Reply
 
Thread Tools Display Modes
Old 06-08-2010, 07:50 AM   #1
mrgdm007
Intake
 
Join Date: Apr 2010
Location: Tulsa, Ok
Posts: 36
mrgdm007 is on a distinguished road
Default Boosting an MK4

Hey so I had a quick question, with bpu parts on a 94 supra with stock tt's, 6speed, and stock intercooler, my question is, is 14,15 psi safe with the stock intercooler on 93 octane and what kind of hp will I be looking at with bpu mods at these boost levels thanks in advance!
mrgdm007 is offline   Reply With Quote
Old 06-08-2010, 04:21 PM   #2
pwpanas
Supra Owner
 
pwpanas's Avatar
 
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
pwpanas is on a distinguished road
Default

Quote:
Originally Posted by mrgdm007 View Post
Hey so I had a quick question, with bpu parts on a 94 supra with stock tt's, 6speed, and stock intercooler, my question is, is 14,15 psi safe with the stock intercooler on 93 octane and what kind of hp will I be looking at with bpu mods at these boost levels thanks in advance!
How many miles are on your turbos? Have you done a compression test? If I can get your mileage and compression numbers, it'll be easier to give you a good answer to your question.

16psi is safe* with fresh 93 (r+m)/2 octane fuel with the oem ecu, but no more. 17psi+ will slowly but surely damage the engine and reduce compression.

*Disclaimer: Ymmv
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.

Last edited by pwpanas; 06-09-2010 at 05:11 AM.
pwpanas is offline   Reply With Quote
Old 06-08-2010, 04:35 PM   #3
mrgdm007
Intake
 
Join Date: Apr 2010
Location: Tulsa, Ok
Posts: 36
mrgdm007 is on a distinguished road
Default

It has 107,000 miles on it I'm not sure on compression but it drives great, was never beatin on it pulls very strong , no turbo smoking or anything like that. If you could give me just a ball park average until I get compression tested but what I'm mainly concerned about the psi my stock intercooler can take than how much hp I'm getting
mrgdm007 is offline   Reply With Quote
Old 06-09-2010, 05:00 AM   #4
pwpanas
Supra Owner
 
pwpanas's Avatar
 
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
pwpanas is on a distinguished road
Default

Quote:
Originally Posted by mrgdm007 View Post
It has 107,000 miles on it I'm not sure on compression but it drives great, was never beatin on it pulls very strong , no turbo smoking or anything like that. If you could give me just a ball park average until I get compression tested but what I'm mainly concerned about the psi my stock intercooler can take than how much hp I'm getting
Ballpark average for a bpu mkiv tt at 15 or 16psi is 350rwhp (= 412hp at the crank) or so.

The stock SMIC can easily take 15 or 16 psi. Although the end-tanks are plasic, you could hold them on with a metal tie-down strap if you had to (it's been tried and it works - but only necessary at 20psi+ on race fuel).
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.

Last edited by pwpanas; 06-09-2010 at 05:10 AM.
pwpanas is offline   Reply With Quote
Reply

Tags
boost, bpu, horsepower, mods, psi

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
weird boosting? supraluver4life MKIII Supra 11 02-08-2010 04:36 PM
constant boosting problem supranutz MKIII Supra 4 12-06-2009 02:57 PM
Boosting my 88 7mge lemonhead4696 Non-Generation Specific Questions 5 07-02-2008 03:24 AM
Safe boosting for na-t supraman121 MKIII Supra 0 01-06-2007 08:13 PM
boosting turbo steve119md MKIII Supra 2 09-15-2005 12:09 PM


All times are GMT. The time now is 11:10 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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