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#1
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Enough to run 10’s?
Almost done building a full weight 75 TA on drag radials. I’m wondering if I’ll be able to run 10’s on motor? Please tell me what you think. It’s a nice street car, building to hopefully beat some of the late model cars.
400 block 4.35 stroke 472 cu in 10.5:1 Butler 340 cfm heads 242/248 .540/.563 HR cam on 110 lobe sep 1.65 HS rockers should make .576/.600 lift Port matched Northwind Fast 2.0 EFI Tribal Tubes headers 4L80e PTC 3000-3500 converter 8.5 rear 3.73 30 spline Moser axles Detroit True Trac Girdle Sent from my iPhone using Tapatalk |
#2
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GTO George |
#3
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Around 3900 with me in it. Sent from my iPhone using Tapatalk |
#4
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Yes. You should have the power to dip into the 10s if you hook.
You have talked about your engine but mentioned nothing about the needed mod’s of the fuel system to support the Level of HP, nor have you noted suspension mod’s like the needed frame spanner’s and traction bars , nor the front end mod’s for weight transfer.
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I do stuff for reasons. |
#5
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Where are you located and what is the elevation of the track you’ll be running at? Near sea level on a cool day if all your supporting systems dialed in it’d be doable. A hot summer day at a higher elevation probably not.
The tri-y headers look cool but if you want to get the most performance out of your set up long tubes with a good 3” exhaust behind them would help. Let us know how it works out
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68 GTO,3860# Stock Original 400/M-20 Muncie,3.55’s 13.86 @ 100 Old combo: 462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's. 1968 Pontiac GTO : 11.114 @ 120.130 MPH New combo: 517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's 636HP/654TQ 1.452 10.603 @ 125.09 http://www.dragtimes.com/Pontiac-GTO...lip-31594.html |
The Following User Says Thank You to TCSGTO For This Useful Post: | ||
#6
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62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs |
#7
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I have a 400LPH in tank pump, haven’t bought lines yet, but think I will run #8 so I have room to grow.
I have UMI springs front/rear, CPP control arms, & Hotchkis Subframe Connectors so far. Pypes 3” true dual with X pipe header back exhaust with Race Pro mufflers. Elevation is 242 ft (Memphis Raceway) Also planned on sending my intake to NX to have a spray bar installed, but I’m going to see if I can fit a 1/2” plate under the drop base & shaker. Sent from my iPhone using Tapatalk |
#8
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I think it would be close. 11.05 at 123 mph. Car is heavy. What size rear tire?
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68 Firebird. IA2 block, 505 cu in, E-head, Solid roller 3650 weight. Reid TH400 4:11 gear. 29" slick. Best so far 10.12@133 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
#9
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I thought the same thing when Butler recommended it. He assured me it was the cam I wanted. If I could go bigger (enough to justify the cost) and still pull enough vacuum and be streetable, I’d rather do it now before I stick the motor in. I figure he spec’d this cam because it’s a street car, with some track days here and there. I’ve had some 600-800rwhp turbo/blower LS cars, and that’s the kind of cars I’m looking to put a whooping on at the track. Sent from my iPhone using Tapatalk |
#10
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275/60 I won’t be mad at an 11 flat Sent from my iPhone using Tapatalk |
#11
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LoL, Ya you will, You'll do everything in your power to see 10.99999 on the board... you'll have to get it to hook off the line also.
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68 Firebird. IA2 block, 505 cu in, E-head, Solid roller 3650 weight. Reid TH400 4:11 gear. 29" slick. Best so far 10.12@133 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
#12
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Haha I know. But for now I’ll be tickled with it on motor. Sent from my iPhone using Tapatalk |
#13
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If that is a Butler cam he typically uses Comp Xtreme Energy lobes. If they are lobes 3317 & 3318 then your valve lift with a 1.65 ratio would be .594" / .618".
You might consider Comp QXI lobes listed on page 24 here: https://www.compcams.com/lobe-catalog They would raise your valve lift to 0.658" which would better take advantage of your cylinders heads. If these are Butler heads I suspect that 340 cfm number is at 0.700" lift.
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
#14
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Yes, it’s the 3317/3318. I thought the same in terms of being rated at 340cfm @ .700 & asked him why I wouldn’t take advantage of the port volume with more lift. He simply said they’ve done a lot of testing and this was what he recommended. I agree I could pick up a lot with the one you’re talking about, but would it be streetable? Sent from my iPhone using Tapatalk |
#15
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I'm not necessarily agreeing with the cam choice offered up by Butler but for conversation compare a XE lobe with a QXI lobe.
Lobe 3317 294 242 164 .3600" Lobe 13454 295 243 164 .3990" Other than maybe consideration regarding spring choice is the QXI lobe less streetable compared to the XE lobe ? "If you want to build a street motor with the most power without a sacrifice of idle and low speed qualities, then lift is the most important factor to maximize, not duration. The best suited cams are those that seek to maximize lift while only adding a minimal amount of duration." David Vizard .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
#16
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My 78 with a 0.030 over 455 10.25 320 cfm Eheads Torker 2, UD HFT 239./247 @0.050 Holley 850 2" Hookers through a 3" full exhaust 4.10 gears TH350 29.2 diam 9" radial slick ran 10.90 in perfet air weighing 3750.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
#17
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based on that combo i think you should do 10's pretty easy.
for comparison i have a 467 stroked 400, 4.25 & .060. 10.7. OF cam, SD ported 71 HO intake & cliff built Q-jet, robbmc 1100 mech pump & 1/2" pickup & lines. th400 with continental 3200 converter & 3.23 8.5 rear. no traction aids & very stiff auto-X type suspension not made for drag racing. & out of the box stock O-port E-heads. 72 firebird at ~3500lbs. best is 11.2x at 121-123, have to leave off idle & roll into throttle or have serious traction issues with older 255/60 MT drag radials & fighting a fuel starvation issue on any real good runs. im hoping for 10.9 once i figure out the fuel issue & get a new set of tires. even with your car being a little heavier you have a lot more head CFM, cam, intake, gears etc, should do 10s pretty easily. |
#18
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Might be a tad too much gear. Depending on converter slippage, you could be past your shift points before the finish line.
Maybe see if you can squeeze in slightly taller tires, which will also help with traction.
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'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust My webpage http://lnlpd.com/home |
#19
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MY friend Tom Reaves has his full weight 78 TA 3800# although its is 501 ci 455 060x 4.5 with Butler 340 Edelbrocks but its like 13:1 ish ? also big solid roller maybe 280 @ 050 Victor intake 1000 cfm 4150 carb , 3 spd auto 3500 ? It also has a 8.5 3.73 rear and usually only runs 1/8 but ran out 1/4 once was a 10.3 130+ usually runs 6.4 1/8 year around.. this past year his trans crapped 1st gear and its a manual VB he was launching n 2nd gear the rest of season and still ran 6.8's !
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63 Catalina coupe 455 budget drag car 11's 1/4 , 7.4 1/8th 66 Star Chief Executive 57k mile 69 Le Mans 2 dr HT 350 85k mile 15 sec 1/4 69 Firebird 400 Burgandy/Black 70 Olds Rallye 350 F85 4 speed 3.91's 70 Olds Cutlass Cruiser Red Wagon 350 101k miles 15 sec 1/4 12 sec w 455 74 Cheyenne Super C10 LWB Gen 6 454 w ZZ502 cam 3.07gear 13.1 1/4, 8.3 1/8 2020 RAM 1500 SLT 4x4 5.7 A8 Hemi 2007 Hummer H3 3.7 liter turd 2019 Chevy Spark petrol car 38 mpg |
#20
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Thanks guys. Once it’s together, if I need to go to 3.42’s that’s no big deal, I’m good at building rear ends. I like Steve C’s ideas on the cam, and I’m considering it. Wondering if it will require lifter bore braces, which will be a deal breaker as my long block is together.
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