Grand prix GTP 1999 S/Ced running off 87 octane mods - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Reply
 
 
 
Thread Tools Search this Thread
Old 11-14-2006, 06:30 PM   #21
Senior Member
True Car Nut
 
Join Date: Feb 2005
Location: Brampton, Ontario
Posts: 3,014
Thanks: 0
Thanked 0 Times in 0 Posts
Maymybonnieliveforevr is on a distinguished road
Default

Quote:
Originally Posted by SSE14U24ME
Quote:
Originally Posted by willwren
BS. He'* doing long-term damage to the pistons at the very least. If he can't afford the premium fuel, he can't afford the car.

I gaurantee he has KR. KR means the PCM HAS ALREADY SEEN THE KNOCK AFTER IT HAPPENED.

Premium Unleaded Fuel Only means exactly that for a reason.
Bill is so right on the money!! Tell your friend to not be so damn cheap! It calls for premium fuel for a reason. Your friend should have taken that into consideration when he bought the car if that was going to be an issue. Jeff & I have informed a few people we've seen at the pumps and they said they were told it was okay and didn't realize what it could do to their cars. Those other people steering him wrong ain't gonna have to live with the end results.

I got to tell ya, my wife'* Acura Vigor 5 cyl. states to use premium fuel only, and she'* only put about 2 tank fulls in about 14 years. Ya she'* cheap and I don't have a problem with that.

I don't even put premium fuel in her car.
Maymybonnieliveforevr is offline   Reply With Quote
Old 11-14-2006, 06:34 PM   #22
Junior Member
 
Join Date: Sep 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
jwakamud is on a distinguished road
Default

ask your prof to put it in writing so he can pay for fixing it when things start happening.
jwakamud is offline   Reply With Quote
Old 11-14-2006, 06:39 PM   #23
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Quote:
Originally Posted by Maymybonneliveforever
I got to tell ya, my wife'* Acura Vigor 5 cyl. states to use premium fuel only, and she'* only put about 2 tank fulls in about 14 years. Ya she'* cheap and I don't have a problem with that.

I don't even put premium fuel in her car.
I had no idea those cars were supercharged or turbo.

Let'* compare apples to apples, eh?
willwren is offline   Reply With Quote
Old 11-14-2006, 06:41 PM   #24
Senior Member
True Car Nut
 
Join Date: Feb 2005
Location: Brampton, Ontario
Posts: 3,014
Thanks: 0
Thanked 0 Times in 0 Posts
Maymybonnieliveforevr is on a distinguished road
Default

Quote:
Originally Posted by willwren
Quote:
Originally Posted by Maymybonneliveforever
I got to tell ya, my wife'* Acura Vigor 5 cyl. states to use premium fuel only, and she'* only put about 2 tank fulls in about 14 years. Ya she'* cheap and I don't have a problem with that.

I don't even put premium fuel in her car.
I had no idea those cars were supercharged or turbo.

Let'* compare apples to apples, eh?
Let me check, NOPE I never said it was */C if you check the
bold area in my post I was replying to a statement SSE14U24ME said, please read carefully before replying.
Maymybonnieliveforevr is offline   Reply With Quote
Old 11-14-2006, 07:09 PM   #25
Junior Member
 
Join Date: Sep 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
jwakamud is on a distinguished road
Default

i fail to see how a nonsupercharged/nonturbocharged car has anyting to do with this thread.

that was wills point. hence the "apples to apples" comment he made.

now back to the intelligence inherent in disregarding manufacturer specs.
jwakamud is offline   Reply With Quote
Old 11-14-2006, 08:17 PM   #26
Senior Member
True Car Nut
 
Join Date: Feb 2005
Location: Brampton, Ontario
Posts: 3,014
Thanks: 0
Thanked 0 Times in 0 Posts
Maymybonnieliveforevr is on a distinguished road
Default

Quote:
Originally Posted by jwakamud
i fail to see how a nonsupercharged/nonturbocharged car has anyting to do with this thread.

that was wills point. hence the "apples to apples" comment he made.now back to the intelligence inherent in disregarding manufacturer specs.

And I made no reference to the apples to apples since that'* not what I was replying to?


Can I ask a question? What'* happening to this forum lately?
Maymybonnieliveforevr is offline   Reply With Quote
Old 11-15-2006, 02:39 AM   #27
Senior Member
True Car Nut
 
Join Date: May 2003
Location: Holt, MI & Lima, OH
Posts: 3,022
Thanks: 0
Thanked 0 Times in 0 Posts
dbtk2 is on a distinguished road
Default

Quote:
Originally Posted by SubDude199
also.. its not a DHP PCM.. its a custom tune by a powertuner..
If thats the case maybe you should pull like 5 degrees of timing across the board to rid of the KR. It will hurt your performance from what it would be with 93 octane, but will help your engine survive MUCH better. No knock = much happier pistons.

Quote:
This can be done, I know someone personaly with a 99 GTP that he runs on 87 octane. He has tons of mods including a cam and headers which suggests a performance orientation but his current focus is gas mileage.

He runs a 3.4" pulley with 21* at WOT and up to 44* timing at cruise with no signs of KR.

Still, I think it'* a rather pointless excersise but it can be done.

Cheers,
I don't doubt that with that setup he can run a 3.4 pulley on 87 ocatne with no issues. That is also a setup that should be running around a 3.0 pulley with a good tune on 93 octane, and I'd imagine its tuned in pretty well also. I'm sure I could run a 3.4 pulley on my car with 87 octane with no KR as well, but thats with my mods not his.

It can be done with a 3.4 pulley, but not a 3.4 pulley and those mods.
dbtk2 is offline   Reply With Quote
Old 11-15-2006, 02:44 AM   #28
Senior Member
True Car Nut
 
Join Date: May 2003
Location: Holt, MI & Lima, OH
Posts: 3,022
Thanks: 0
Thanked 0 Times in 0 Posts
dbtk2 is on a distinguished road
Default

Quote:
Originally Posted by Maymybonneliveforever
Quote:
Originally Posted by jwakamud
i fail to see how a nonsupercharged/nonturbocharged car has anyting to do with this thread.

that was wills point. hence the "apples to apples" comment he made.now back to the intelligence inherent in disregarding manufacturer specs.

And I made no reference to the apples to apples since that'* not what I was replying to?


Can I ask a question? What'* happening to this forum lately?
I understand that you were commenting on the being cheap part and not really the running regular fuel part. However, in a N/A application, it is harder to blow it up due to detonation than it is a forced induction application because of cylinder temps and cyl pressure. Boost is a lot harder on the pistons then a high compression N/A engine. IMO running premium in that setup isn't as important as running it in a forced induction setup.
dbtk2 is offline   Reply With Quote
Old 11-15-2006, 09:34 AM   #29
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Quote:
Originally Posted by Maymybonneliveforever
Quote:
Originally Posted by jwakamud
i fail to see how a nonsupercharged/nonturbocharged car has anyting to do with this thread.

that was wills point. hence the "apples to apples" comment he made.now back to the intelligence inherent in disregarding manufacturer specs.

And I made no reference to the apples to apples since that'* not what I was replying to?


Can I ask a question? What'* happening to this forum lately?
I'll answer this here in case anyone else is confused by this, rather than in a PM:

There are many members here who may not understand. There are specific reasons supercharged cars, even in stock form, should run 91 octane minimum at all times. Those reasons are unique to supercharged cars and are unrelated to whatever reasons an Acura may or may not be required to. By stating your wife'* Acura has never had the octane it required, you may be telling someone here that their L67 should be fine too, which isn't the case. We're trying to get the most accurate picture across to the topic author and the car owner in question. And an Acura has nothing to do with that whatsoever.

In other words, nothing is happening to this Forum. We're trying to keep this on topic.
willwren is offline   Reply With Quote
Old 11-15-2006, 09:51 AM   #30
Senior Member
Posts like a Northstar
 
Join Date: Jun 2005
Location: Yulee , FL ___ SEBF Survivor
Posts: 700
Thanks: 0
Thanked 0 Times in 0 Posts
ChaseSmith is on a distinguished road
Default

Everytime my gf ever put gas in my old GTP she put 87. Of course she drove it conservatively (sp?), but I didn't. I enjoy riding more than driving most of the time, so I never noticed it when I was riding, but when I got in the car and beat it up, I could feel the KR knocking off timing. It took me awhile to realize, until I stumbled across a gas receipt for 87.

Now I have her trained, all of my cars except for my Sonoma take 93, but she even puts 93 in that now
ChaseSmith is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
off topic.........Grand Prix GTP question........ pumpedTSI Buick 7 04-23-2009 10:08 AM
92 S/Ced engine and trans into a 91 SSE FriendSSEI Performance, Brainstorming & Tuning 6 01-18-2009 05:58 PM
Octane Points (Octane Boost) bandit General GM Chat 2 08-28-2007 11:21 PM
1999 Grand Prix GTP price? brnvs General GM Chat 12 12-23-2005 10:47 PM
Need audio of flowmasters on a 1999 pontiac grand prix GTP killer_cr80r Lounge 1 09-01-2004 09:02 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -4. The time now is 05:49 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.