05-13-2008, 08:08 PM | #1 |
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Join Date: Apr 2007
Location: Lockport N.Y.
Posts: 37
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24's or 30's?
I want to get a little more input on if I need 30's or not. Right now I have 24's, but as I get closer to completion, I think I might need 30's. Heres what I have: 306 with roughly 10.1 to 1. Twisted wedge heads, custom grind .553 int .525 exh (I forget exact duration @.050 and I don't have the sheet in front of me but I think it was 224 int and 228 exh) GT-40 intake with lower port matched to my heads, 1.6 rockers, CAI, 70mm TB, soon to be Pmas MAF, 255lph pump, Adj fuel reg, and I do have a plate kit I'll be spraying roughly a 150 shot, but its a wet kit.
Just want to see what you guys think before I get the MAF.
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306 stock block, balanced forged internals, main girdle, cam motion custom grind, Twisted Wedge heads, GT-40 intake with port matched lower, 24# injectors, Big Shot plate kit, equal length shortys, o/r x-pipe, CAI, electric fan, A/C and smog delete, all the supporting mods. |
05-13-2008, 08:19 PM | #2 |
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If I had it to do again, I would do 24's with my setup.....
actually I wouldn't since the 30's were free
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91 GT Convertible 2006 Nissan Titan LE Crew Cab 2014 Peterbilt 337/Marion 22' box |
05-13-2008, 08:23 PM | #3 |
3v's are slow
Join Date: Dec 2004
Location: Here and There
Posts: 17,152
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24's should be fine
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2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy |
05-13-2008, 08:38 PM | #4 |
Daddy x4 ...we're done
Join Date: Dec 2004
Location: Oxford, AL
Posts: 11,551
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+1
30's are overkill on any N/A 306 and they kill your idle quality.
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-Brian '86 Mustang GT Convertible '88 Mustang LX coupe '11 Odyssey TE '21 Insight Touring |
05-13-2008, 08:39 PM | #5 |
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I disagree. No idle problems here.
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91 GT Convertible 2006 Nissan Titan LE Crew Cab 2014 Peterbilt 337/Marion 22' box |
05-13-2008, 08:46 PM | #6 |
Bet I red light B4U
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24's are plenty for a 306.
Matt your just lucky or your tuner is the shit. The 331 had serious problems hunting for an idle.
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89 gt 2.3 stroked holley head with n12n port high flow intake with great big fart can skunk 2 seat belts with kool glow water squirters and new light up shift knob basically everything from wal-mart art carr C4 10.53@127.3 w/ 1.53 60' 89 gt vert 347 eldebrock heads and intake AOD w/3000 stall unknown with 5spd went 12.7 on steet tires 04 Mach1 automatic flowmaster K+N drop in 13.9 |
05-13-2008, 08:48 PM | #7 |
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now that you mention it, it did idle a little better after I replaced the distributor and reset the base timing. still running that wideband tune cause i'm broke.
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91 GT Convertible 2006 Nissan Titan LE Crew Cab 2014 Peterbilt 337/Marion 22' box |
05-13-2008, 08:49 PM | #8 |
Daddy x4 ...we're done
Join Date: Dec 2004
Location: Oxford, AL
Posts: 11,551
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Typically, it will run a bit rich because the pulse widths can't go small enough with these low impedance injectors. It may be idling smoothly, but it likely is running richer than it should.
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-Brian '86 Mustang GT Convertible '88 Mustang LX coupe '11 Odyssey TE '21 Insight Touring |
05-13-2008, 08:51 PM | #9 |
Welcome to America!
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That I will agree with. I will likely buy some 24's and a tunable MAF when I get a tweecer.
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91 GT Convertible 2006 Nissan Titan LE Crew Cab 2014 Peterbilt 337/Marion 22' box |
05-13-2008, 08:54 PM | #10 |
Member
Join Date: Apr 2007
Location: Lockport N.Y.
Posts: 37
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In that case, I'll keep the 24's for sure. They've been sitting dry for over a year now and I got them used to begin with, any reccommendations of a good place to send them for a rebuild?
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306 stock block, balanced forged internals, main girdle, cam motion custom grind, Twisted Wedge heads, GT-40 intake with port matched lower, 24# injectors, Big Shot plate kit, equal length shortys, o/r x-pipe, CAI, electric fan, A/C and smog delete, all the supporting mods. |
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