Author Topic: Boost question (Read 12080 times)

snaponbob · « **on:** April 05, 2009, 12:54:14 PM »

Okay tuning mavens. Here is something to ponder. I have noticed in 2nd, 3rd, and 4th gears that when I jump in the gas anywhere from 3500-4400 rpm the boost will often jump up to 23 (on the DIC) and then pull back to 20-21 psi. Is there way (or a benefit) to hold the boost at 23 psi? I have the Dejon spring, and this happens at stock and adjusted WG settings.

DeepBlueGXP · « **Reply #1 on:** April 05, 2009, 01:16:47 PM »

It could be pulling boost due to KR, did you do a HPTuners scan?

snaponbob · « **Reply #2 on:** April 05, 2009, 04:29:06 PM »

Quote from: DeepBlueGXP on April 05, 2009, 01:16:47 PM

It could be pulling boost due to KR, did you do a HPTuners scan?

Not of that specific symptom. Not YET. But going to.

lil goat · « **Reply #3 on:** April 06, 2009, 07:25:32 AM »

Boost is kind of a weird animal, it is an on demand kind of thing, and the ECM with pull timing in a hurry if it senses KR, try some higher octane gas or some good octane booster, you'll get less KR and hence more boost. Long time ago I played with octane booter on the dyno, back on Lyndon't first tune for the GXP. I saw a 7 hp difference from just the octane booster, it was Nitro Plus or something like that.

snaponbob · « **Reply #4 on:** April 06, 2009, 08:38:30 AM »

I have only seen KR in a couple rev ranges, and then only occasionally with no more than 3 degrees of retard. When the tune was built I had specified 91 octane. Since the one set of dyno pulls Lyndon did tweak the tune but I have not dyno'ed since. However, on the road the KR does pop up once in a while. I think I'll start a thread about octane boosters.

spicy3480 · « **Reply #5 on:** April 06, 2009, 08:45:01 AM »

I read somewhere that octane boosters were not really that great, but I would be curious to some more information on that. I have race gas in 100 and 110 octane available on the corner by my house, but I am looking at $8.00 and $8.49 per gallon respectively.

Critterman · « **Reply #6 on:** April 06, 2009, 10:35:06 AM »

Just thinking outloud here, but since boost is dependent on requirement and demand, I'm wondering if the requirement is some how lessened as the once the initial request for power (you stomping your right foot to the floor) ie once the car starts pulling?

Ben L · « **Reply #7 on:** April 06, 2009, 11:11:52 AM »

OK, I'm a dumbass. What's KR?

spicy3480 · « **Reply #8 on:** April 06, 2009, 11:45:08 AM »

KR is knock retard (I'm not calling you a retard)...it's actually "knock retard"

Ben L · « **Reply #9 on:** April 06, 2009, 04:18:31 PM »

Ahhh. Makes sense. What with all the talk of boosting octane and all . . .

OK, so I'm a retard, not a dumbass.

Whoops. Now do I have to join that bowling match between Obama and the Special Olympics guy? I am sure the SO guy would kick my re . . . I mean . . . dumb ass!

Go-N Def · « **Reply #10 on:** April 06, 2009, 11:07:20 PM »

Careful, don't talk about retards. Chuckdoc might get offended. He enters the dancing competition every year...

Sol Asylum · « **Reply #11 on:** April 06, 2009, 11:34:15 PM »

Quote from: Go-N Def on April 06, 2009, 11:07:20 PM

Careful, don't talk about retards. Chuckdoc might get offended. He enters the dancing competition every year...

I think I have seen that it's called Dancing with the Midgets I mean little people isn't it?

chuckdoc · « **Reply #12 on:** April 07, 2009, 07:58:52 AM »

Hey, you guys. I resemble that fact.

lil goat · « **Reply #13 on:** April 07, 2009, 08:38:02 AM »

Most octane boosters are crap, but there are a few that work, none that I know of will add much more than a point or 2 at most unless you talk about toluene.
Toulene
R+M/2...114
Cost...$4.50/gal
Mixtures with 92 Octane Premium
10%...94.2 Octane
20%...96.4 Octane
30%...98.6 Octane
Notes: Common ingredient in Octane Boosters in a can. 12-16 ounces will only raise octane 2-3 *points*, I.e. from 92 to 92.3. Often costs $3-5 for 12-16 ounces, when it can be purchased for less than $5/gal at chemical supply houses or paint stores.

Octane ratings can be very easily calculated by simple averaging.

Toluene is 114 octane. So use this formula to figure what octane you get:

( Gallons_of_gas * Octane_of_gas ) + ( Gallons_of_toluene * 114 )
___________________________________________________
Total Gallons

(12 X 93) + (1 X 114)/ 13 = 94.6 or a 1.6 boost in octane from adding 1 gallon of Toluene before you fill up your tank.

The equation is the same for adding 100 octane or 110. If I could get 110 I would add about 2 gallons per fillup should give you roughly 96 octane.

http://www.europeancarweb.com/tech/0503ec_octane_boosters_tested/index.html

Deep-GXP · « **Reply #14 on:** April 07, 2009, 01:56:02 PM »

I was looking into Toulene yesterday. Is this stuff still available?

G8TR · « **Reply #15 on:** April 07, 2009, 04:02:10 PM »

Go to wikipedia, looks like they're still making it. Even talks about it's use for automobiles.

lil goat · « **Reply #16 on:** April 07, 2009, 05:25:09 PM »

It is an ingredient in gasoline so yes they still make it, it is very volatile and very aromatic (evaporates quickly) it is also VERY caustic it will eat you up and can cause cancer. Most places don't stock it, I have been to 2 paint stores, no luck maybe an auto body supply store. I am continuing to look but I think maybe I may just go in on a 55 gallon drum of VP racing fuel, he can keep it at his shop it's not far away. You can order it and they will deliver 1 gallon jugs right to your door.
http://vpracingfuels.com/fuels_unleaded.asp
or you can get the Sunoco delivered to your door, a little less than $10 a gallon for 102 unleaded.
http://www.worldwideracingfuels.com/category.aspx?categoryID=133

DeepBlueGXP · « **Reply #17 on:** April 07, 2009, 08:11:50 PM »

I think Lowes carries it.

Deep-GXP · « **Reply #18 on:** April 08, 2009, 09:57:57 PM »

Im going to check out a local paint store for Toluene (114 octane) and Xylene (117 octane).

Someone assured me that Home Depot carry's Xylene for $16/gallon

1 gallon of xylene and the rest 91 octane would yield me 92.95 octane rating, so in total that breaks down to $3.70/gallon for 93 octane gas.

I have a question for you people that can get 93 octane....how much does it cost? Is it only 10-20 cents above 91 octane just like 87/89/91 only has a 10 cent difference or does the price for 93 oct jump up more? I think it's lame we can only get 91 octane here in california and if we want 93 octane we need to pay about $1.25 more per gallon if we were to mix the xylene with 91.

HAMMER DOWN · « **Reply #19 on:** April 09, 2009, 05:33:27 AM »

^^^ Depending on where you buy your gas, $0.20 to $0.30 more the 87oct. (reg. unleaded) here in NY. $2.319 a gal. for now.

Mike

Critterman · « **Reply #20 on:** April 09, 2009, 08:44:00 AM »

Shell 93 octane in my area runs any where from 2.23 to 2.53 depending on the location of the station

G8TR · « **Reply #21 on:** April 09, 2009, 05:04:42 PM »

About 10 - 15 cents a gallon cheaper here for Shell 93.

tazz · « **Reply #22 on:** April 09, 2009, 06:17:08 PM »

Kinda all depends where you live on the availability of anything over 91 at most fuel stations unless there a a specific station geared toward the race crowd.
Here in Topeka Kansas Amoco was the only service station that actually offered there Top tier fuel rated at a Min of 92 octane while most others where rated at a min of 91. The one thing to remember is that the number is a minimum due to the way the law is written and can actually test higher so it's kinda hard to really tell which station might have the higher octane rating without testing of each. I would assume though that the higher the Min octane rating the higher it possibly could test and is the reason I go with Amoco fuel but who knows for sure.
Interesting thing I noticed yesterday was that the Amoco station I frequent the state had changed there premium fuel octane stickers to min of 91 octane. I talked to the attendant and they said it's still the same fuel octane rating as before so a Min of 92 but something about another law change went into effect so they had to change the stickers.
So it really all depends where you live As I know some Amoco stations around the US sells 93 and at one point 94 as well as Sunco and Shell. It all depends where you live and I'm not sure of the criteria that they use to determin what area gets the higher octane vs which get the lower octane level or if it's all the same just the way certain States require them to label the fuel?
If anyone know the answer to that ? please post up.

Deep-GXP · « **Reply #23 on:** April 09, 2009, 09:27:35 PM »

Just as I thought. Dang it. You jerks !!! lol

I wish i could pay just 50 cents more per gallon to get 93 instead of 91 but NOOOOOOOOOO i have to buy stupid 100 octane gas for $8/gal or Xylene for $16/gal which will bring my cost up about $1.25 more per gallon.

COME ON CALIFORNIA! Sell 93 oct for 30-50 cents above 91 lol. It'll sell !!!

BLAH !

K, rant over.

G8TR · « **Reply #24 on:** April 10, 2009, 01:13:46 PM »

Man I feel sorry for the guys in Cali. 93 makes a difference, in Florida the other choices are 87 or 89. I wouldn't put that stuff in my car, especially since the book says premium and my car is tuned for 93. Hope that when I go out of state I'll still be able to find it everywhere. Either that or I'll be using an additive.

News:

Welcome Guest!!!

Author Topic: Boost question (Read 12080 times)

lil goat

Ben L

Ben L

lil goat

lil goat