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> I am just going to run low boost. . . yea right!, A warning for anyone who wants to boost a 5sfe
post Mar 7, 2017 - 10:57 PM
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HardHead93

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So I have been enjoying the car with the swapped motor. I have been driving it almost everyday. It is like having a new toy. My daily driver is definitely getting neglected. I sent a question to PrimeMR2 about how much boost I should run since I am only able to get a hold of 91 octane. Every dyno chart I have seen with a 4th gen running 17 psi has been on 93 octane or higher. They responded with the following:

"You can run 14 psi on 91 octane. You can run 17 psi if you add some octane booster to each tank."

Good to know because if I ever went up to 17 psi on 91 octane, I could have caused some damage to the motor. For now I will stick with 12-13 psi, that is more than enough for now.

This post has been edited by HardHead93: Mar 7, 2017 - 10:58 PM
post Mar 8, 2017 - 12:40 AM
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Box



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Check the Sunoco Fuel site for any Sunoco stations near you since they'd have higher octane fuels available. Personally I'd stay around 14 psi then as well if you only have 91 readily available, I don't trust off the shelf octane boosters.


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1996 Pontiac Firebird Formula hardtop 6-speed
post Mar 24, 2017 - 9:26 PM
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HardHead93

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After spending last weekend on the track losing traction all over the place, especially in the curves I decided to order some wheels. I went with a 17x8 with a +35 offset. I am looking to put some 245/40/r17 wheels on the car. After seeing all you guys input, I am looking to put some BFG Comp 2s on the car. I am just wondering if I should go with the all-seasons or the sports. The sports look like they put more rubber to the pavement but I am worried about what will happen driving in the wet. I plan to track this car once a month through out the spring, summer, and fall, but I also drive it 1 to 2 times a week on the streets. What do you guys think about my tire selections?
post Mar 25, 2017 - 2:25 PM
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With 275/40-17 Sport COMP-2's on 9.5" wide rims all around I have no problems in the rain and that's in a RWD car with a solid axle, of course I also adjust to the driving conditions as well. The only thing on the tire selection is I'm trying to remember how wide you can go on the Celica without rubbing, all else fails 215/45-17 would be a safe option. You only put down as much rubber as there is rim to push it down anyway, honestly the only reason I have 275 is they came with the rims but when I go to replace them I'll probably do 255/45-17 to remove some of the sidewall bulge.


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1996 Pontiac Firebird Formula hardtop 6-speed
post Mar 25, 2017 - 7:02 PM
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HardHead93

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QUOTE (Box @ Mar 25, 2017 - 2:25 PM) *
With 275/40-17 Sport COMP-2's on 9.5" wide rims all around I have no problems in the rain and that's in a RWD car with a solid axle, of course I also adjust to the driving conditions as well. The only thing on the tire selection is I'm trying to remember how wide you can go on the Celica without rubbing, all else fails 215/45-17 would be a safe option. You only put down as much rubber as there is rim to push it down anyway, honestly the only reason I have 275 is they came with the rims but when I go to replace them I'll probably do 255/45-17 to remove some of the sidewall bulge.


I am worried about the Comp 2 Sports because it has that constant contact patch down the center of the tread and no mileage warranty. That screams track only tire to me. I track my car for fun not to win any competitions. It is good to hear you are having no problems with that tire in the wet. As far as size, the tire shop I go through is going to test fit a 235/40-17 and a 245/40-17 on one of my wheels when the come in. I know a 235 will fit with no rub but those are on back order. We will try out the 245s on a test fit and if it will work.
post Mar 25, 2017 - 8:00 PM
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It's a summer performance tire, and really it's fine with the mild Alabama winters even. The Firebird is a daily driver rain or shine and the Sport COMP-2's are the best tires I've used personally. They don't have a stated mileage warranty but from what I found most people get at least 20,000 miles out of them if rotated. Most summer performance tires regardless of brand don't have a stated mileage warranty for whatever reason, but I suspect it's because they expect most will abuse them and then try to claim a refund when they don't last the stated amount. The only summer performance tire I've seen with a mileage warranty is the Cooper Zeon RS3-S and Michelin Pilot Super Sport.


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1996 Pontiac Firebird Formula hardtop 6-speed

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