: Track Results w/ New Combo, Your Thoughts?
Savage396 May 31st, 04, 9:32 PM 13.205@100.40 mph. This is my quickest time of the night, consistently in the 13.2's and 3's, with my best 60 ft at 1.88. DA was around 2200 ft, it was pretty warm, with a nice tailwind (HRP for you Houston guys). I come off the line hard (3500 stall), but the engine seems to fall flat in the mid rpms, then take off again at 5, all the way to about 5700, then it starts to cut out. My rev limiter is set at 6, I shift at about 5800. I have a stock replacement Carter fuel pump, with a 5/16'' line, which I believe may be holding me back a bit. 3310 Holley is box stock, never touched. Here's my combo:
414 BBC, L2383 slugs, 290s w/ some unshrouding, cleaned up ports, 2.19I/1.88E, CC 292H, Crane 1.72 RR, Summit HEI, Edelbrock RPM, 3310 Holley, Hooker Comp headers(I think 1 7/8 primaries), 2 1/2'' exhaust, TH-400 w/ 3500 stall, 275/60R15 BFG Drag Radials, 3.73 gears, 3684 race weight w/me.
Thanks, Mike
Bob West May 31st, 04, 9:58 PM Need at least a 120 gph fuel pump,at least 3/8 fuel line and I'd like to see at least 3" exhaust with an X pipe or H pipe installed. That little big block might like a little more rpm too. Now start tuning for the 12's, congratulations.
Chevy454 May 31st, 04, 11:21 PM It *might* be your pump holding you back, but I doubt it...if it was the pump, I can't imagine it coming back around where it's loaded the hardest (high rpm's on the big end). That pump should be plenty for your combo. We've been running the stock AC pump and stock fuel lines on our Camaro, and they do the job just fine...
67chevy2 May 31st, 04, 11:53 PM Mike; With that much stall,you might try the tall yellow spring in your secondary diaphragm. Steve
mr 4 speed Jun 1st, 04, 7:12 AM Mike,go for the second lightest yellow spring as Steve mentioned.I run a 3310 out of the box in my combo,and I use that spring.I think you should be around 104-105 MPH easily with your combo,and be in the high 12's
What are you running for timing?
I see the DA was 2200 ft.
Not bad 1st time out..must be a blast to drive too graemlins/thumbsup.gif
69bigblock Jun 1st, 04, 8:30 AM How did you get the car so light? My 69 w/me is 4080. It would be nice to lose the 400 lbs that you did. Just asking...
Frank
Savage396 Jun 1st, 04, 5:58 PM Tall yellow spring it is then. Anywhere else I should look at in the 3310 for improvements?
Frank- I'm not sure how I got to this light weight, its full steel, p/s, p/b, no a/c, iron heads, aluminum intake, full interior, and a quarter tank of gas (170 pound driver). This reading was taken at HRP's scale, I weighed there before with just a little more gas and scaled in at 3724, so I guess the scale is pretty close.
BB_Mike Jun 1st, 04, 8:32 PM Bump the limiter up to at least 6400RPM, even though you do shift down around 5800RPM.
How is your timing curve? Put in the lightest mechanical advance spring for the HEI (if the summit version has them, which it should). Be sure you have a total of 36 degrees BTDC of timing by about 3500 RPM. (note this measurement is without any vaccum advance!)
Check your plugs.
I have a 5/16" line with a Comp140 pump. Check out my combo. ;) I ran 105MPH with your heads.
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