Post your 11/12 second 455 combos!

Discussion in 'Street/strip 400/430/455' started by oldschool85, Nov 9, 2013.

Tags:
Page 3 of 13
  1. J.Staged

    J.Staged My Therapy...!!

    Good thread,.. anybody else...!
     
    J.Staged, Dec 23, 2013
    #41
  2. Thumper (aka greatscat)

    Thumper (aka greatscat) Well-Known Member

    Very simple and basic: 1970 GSX @ 3800lb.

    '70 455 +.030, sealed power forged pistons with 9.7 actual compression
    Iron intake, iron exhaust,old set of Kenne-Bell ported iron stage 1 heads
    800 cfm QJ
    full 2 1/2" exhaust, 3.42 posi,
    old KB mark 118 hyd cam
    2800 converter
    et 12.78 @ 106mph with street stickies.
    gary
     
    Thumper (aka greatscat), Dec 23, 2013
    #42
  3. gsx678

    gsx678 Well-Known Member

    Hope for mid 11's when its done.
    1970 full weight Skylark.
    464" close to zero deck for 10.5 -10.6 to 1 compression.
    Wiseco forged pistons.
    Stock rods with ARP bolts.
    Stock crank.
    Scotty Brown solid cam. Around .585 lift. Scott says this cam has put several cars in the mid 10's with this cam and well ported aluminum heads.
    TA 1.65 roller rockers.
    68 Big Port heads converted to Stage 1 and ported. (These might hold me back)
    TA SP1 Intake.
    1000 cfm AED Holley.
    Mallory Unilite ignition.
    TA 2" Headers
    3800-4000 converter
    TH400
    12 bolt rear with 4.10s
    28" tire
    3" Full TA Exhaust
     
    gsx678, Dec 24, 2013
    #43
    71stagegs likes this.
  4. 455stude

    455stude Well-Known Member

    1955 Studebaker.....69' 430, ported 69' heads w/stage one valves, sp-1 intake w/ 850 demon, hemi killer cam, sealed power replacement forged pistons, stock rods, t-400 with 4000 stall converter, 8 3/4 chrysler w/ 3.73's 30x9 slicks, 3460 lbs. with me in it. Best run to date 11.72 at 112 mph.
     
    455stude, Dec 24, 2013
    #44
  5. gusszgs

    gusszgs Well-Known Member

    '71 full weight GS bench/column shift
    464 ci
    TA STG 1 SE's (street/strip port)
    TA 2" primary SC headers
    Hydraulic cam TA290-08 HL
    JE forged flat tops
    SP-1 Intake
    Balanced stock rods and crank/with ARP hardware
    MSD with 6AL
    Out of box Holley 1000 hp

    TH 350 Manual VB
    Coan 10" converter
    8.5 10 bolt/Eaton 30 spline carrier
    Moser axles
    Motive 3:73's
    Steel stock wheels with dog dish caps
    11x27 Hoosier QT pro's

    Car ran 11.33 @ 121 with a 1.64 60' off the footbrake
    through 3" exhaust (Ultra flow mufflers)
     
    gusszgs, Dec 25, 2013
    #45
  6. J.Staged

    J.Staged My Therapy...!!

    Jim.. nice car and ET's,.. BTW, how much compression are you running with this combo...
     
    J.Staged, Dec 25, 2013
    #46
  7. gusszgs

    gusszgs Well-Known Member

    J....if memory serves if believe the ratio is in the 11.7 area
     
    gusszgs, Dec 26, 2013
    #47
  8. Staged70Lark

    Staged70Lark Well-Known Member

    Great thread... Can any of the combos run pump gas on the street? Can future contributors add what fuel they are running?
     
    Staged70Lark, Dec 26, 2013
    #48
  9. Rob Ross

    Rob Ross Well-Known Member

    Post #15 is a pump gas engine at 10.6:1 w aluminum heads, I helped him build it. My stock appearing combo is 10:1, I believe it will race on pump gas but haven't tried yet. So far I run 3-4 gallons of 110 then fill it up w pump 93 when at the track. Otherwise on the street it's all pump gas.
     
    Rob Ross, Dec 26, 2013
    #49
  10. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    I run my car on pump gas on the street. You can't floor it on street tires in 1st and second gear anyway, and I don't. I would never run at the track without mixing in Race Gas, and I think anyone who does not is very foolish. There is a huge difference between the track and street. At the track, you hook it up solid, and run the engine wide open at maximum load for 11-12 seconds at a time. Any detonation under those conditions, and you WILL do damage, no question about it. My engine was dyno'd with 110. I know the dyno loads the engine more severely than anything you would do on the street, or possibly at the track. I would never take the chance. Just my opinion.
     
    LARRY70GS, Dec 27, 2013
    #50
  11. hugger

    hugger Well-Known Member

    464 10.6comp 230ish 240ish 110lsa ported TA SE stage 1's, Sp1, 950 holley, headers 3in Xpipe to bumper, 4200 stall, 3.31 gear 325-50 dr's, AC,PS,PB, 4000lb 70 Stage, bone stock tightened down suspension just air bags for tire clearance, 11.60 at 113 7.30 at 93 with 1.53 short time, didnt run as hard as id hoped or should but thats what it had, drove several times a week and run hard on 93pump would put 114 in occasionally to clean it out
     
    hugger, Dec 27, 2013
    #51
  12. dentboy

    dentboy stacy kelevra

    Why did Jim dyno it and tune it with 110 when you don't run race gas on the street? Shouldn't you run the fuel on the dyno that you plan on running on the street?? If you dyno it and tune it with pump gas then you can run it at the track with pump gas?? Did you ever check your cranking compression??
     
    dentboy, Dec 27, 2013
    #52
  13. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    I have never run my engine on straight pump gas at the track. That includes all the passes I've made with the car, when it had the all iron motor(13's) I bought it with, my aluminum head upgrade which put me solidly in the 12's, and now with the new motor in the 11's. I was always told to run some race gas at the track, and that makes sense to me. Pump gas is fine if you aren't loading the motor like you do at the track, with the motor wide open through the whole run. Like I said, I don't drive the car like that on the street anywhere, nor would I want to. A few little brief WOT blasts every so often, yes, but with the traffic we have, you have to get out of it as soon as you hit it, not to mention traction problems. I won't street race my car, and everyone I know, knows that about me. I really like my life the way it is, and would never take that chance. Like most of us, I have more Go than Whoah (40 year old braking technology), but I am getting away from the point. The loads are greater at the track, and even more so on the dyno. We aren't talking about 8:1 smog motors here. We are talking about a big block motor putting out more HP than it was designed for. A motor with at least 10:1 compression that takes in more air and has higher cylinder pressures. The biggest threat to an engine like that is detonation. If it detonates at WOT, it will be damaged. Like I said, the BBB was designed as a light weight casting to move big boats around. The cylinder walls are thin. If you detonate it, you'll hurt it. Tune it for pump gas? Sure, you could do that, but I say you are going to leave a substantial amount of power on the table, and when a builder dyno's a motor, he wants the most power he can get out of it. Do any of the engine builders here run their engines on 93 unleaded pump gas on the dyno? I think that is a good question. When Jim delivered my engine, he told me that it would be OK to run it on pump gas on the street, but if I was going to the track, he wanted me to use at least some leaded 110. He tuned both carburetors I use to be safely fat. I paid for 5 gallons of 110 Race Gas when it was on the dyno. Even if the engine was tuned for pump gas on the dyno, what happens to changing conditions on the street. Temperature, barometric pressure. How do you stay out of detonation all the time? Look at modern motors. They have micro processor controlled fuel injection with O2 feedback, smart ignition systems with knock sensors that advance the timing to the edge, and pull it back out at the first sign of detonation (knock retard) That is one of the biggest reasons I want FI on my engine eventually.

    To answer your question though, I have never checked my cylinder pressure. I know my DCR is 7.84:1 which should be OK with pump gas.
     
    LARRY70GS, Dec 28, 2013
    #53
  14. 70 gsconvt

    70 gsconvt Silver Level contributor

    Post #2. I run regular fuel from the gas station. I do usually get premium, 92 or 93 octane. Sunoco used to have Ultra 94 around here, but I don't think any more.
     
    70 gsconvt, Dec 28, 2013
    #54
  15. skylarkcruiser

    skylarkcruiser black forest buick

    Hi together,
    Been out there in Hockenheim this Year in August.
    First Time in the 12 sec with M/Ts 28".
    455 bored .30 over
    Speed pro pistons not the forged
    Comp cams mutha thumpre (TA 284 failed by Brake in)
    Eddi heads and intake
    Hookerheaders 3"
    3" Performance pipes with crossbow
    850 quickfuel
    TA Oil pump, Double chain,gaskets, seals.
    Stock crankshaf and Rods
    Stock converter (can i get fastet by optimizing here?)
    12.73s 178km/h
    The only other Buick on the Track was with Chevy Engine??)
    Best Wishes
    Mike
     
    skylarkcruiser, Dec 29, 2013
    #55
  16. Rob Ross

    Rob Ross Well-Known Member

    Yes, at that trap speed you can run low 12's maybe high 11's (depending on track and weather) with a good torque converter. You may lose a little trap speed but the gain in ET will be worth it.
     
    Rob Ross, Dec 29, 2013
    #56
  17. staged67gspwr

    staged67gspwr "The Black Widow"

    494 ci
    about 10:5.1
    Stage 2 SE heads (2.26" intake valve,1.78" exhaust)
    Diamond pistons
    Crower 4340 rods
    SPX intake
    AED 1000HO carb
    CV/Trishield pump
    stock 455 crank
    294-98F solid cam
    1.60 rockers

    11.9 @123.51 mph with street tires and a stick,2.041 60' car weighs 4000lbs with me in it.
     
    Last edited: Dec 30, 2013
    staged67gspwr, Dec 29, 2013
    #57
  18. moleary

    moleary GOD Bless America

    what trans, rear / gears/ tire combo?

     
    moleary, Dec 29, 2013
    #58
  19. staged67gspwr

    staged67gspwr "The Black Widow"

    Tremec 5-speed,3.73 gears,18" wheels,26" tire.
     
    staged67gspwr, Dec 29, 2013
    #59
  20. moleary

    moleary GOD Bless America

    what gear are you in and at what RPM through the traps

     
    moleary, Dec 29, 2013
    #60
Page 3 of 13

Share This Page