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Possible 10's with my new topend combo...

1196 Views 11 Replies 5 Participants Last post by  Chief fat nutz
current combo is budget but will be replace next year with a better build up long block,but....for the time being heres the plan.

355 stock short block +.030 over
Dart S/S 165 heads with 72cc chambers
Summit .224/[email protected] .465/.488 lift with crane 1.5's on a 114LSA
Hooker Mid-length headers-3" with 3"x-pipe into Hooker aerochambers
Weiand 142 blower running 8psi currently
750DP by Proform(basically a Holley HP carb)
Electric fans,170gph Holley mechanical pump with 1/2" line from tank to carb
Petronix HEI,MSD 6AL and a cold AC/DELCO plug

ATI TH-350 Built to handle 800hp which is what I want someday
ATI 10" 3000-3200 Treemaster
12 bolt,3.73,eaton aftermarket posi/toms axles 325/50R15 M/T DR's

I want to change/upgrade...................

Weiand 177 blower running 8-10psi if possible
Meth injection universal kit for carbs to keep detonation out
Proform 950/Holley 950HP carb
Keep the small Dart 165 heads,blend bowls replace springs at this time
.244/.254 @.050 .509/.533 lift with my 1.5's on a 112LSA cam kit
Moroso trick front and rear springs,fiberglass fenders to match the hood

Sounds like this short block won't last long huh? Maybe not,but a solid [email protected] would be nice before I rebuild a strong 383 next year. I'd like to keep the 177 topend,go to a bigger aluminum head and hope for consistant mid 10's being somewhat reliable/streetable. Whos thinks the 165 Dart heads will be my downfall as with the hydraulic cam? What do you think? Any ideas of how to get there? Im running a few more psi of boost since I went to the track last and I feel like a solid 12.00 car now. I must drop a solid 1.1 second to meet my goal...........who believes in me?
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There are just a couple of things I wanted to comment on. First, the best power comes from having a matched combination. Those 165cc heads are probably going to want to perform in a roughly idle to 5500 RPM range, maybe a hair more. The cam you currently have (.223 .234 @.050) is pretty much a perfect match for where those heads are going to want to perform. The other cam (244 254 @.050) is probably going to want to run somewhere in the range of ~2800-6800. This is not a good match to the heads. As I have seen, it will have the effect of killing low end power, adding only minimaly up high over the smaller cam. As for hp numbers and 1/4 mile estimates, you could probably assume around 340 hp with the lowered compression for the blower and the heads as they are. If you assume a 50% gain at 8 psi (which may be more than you actually get) with the blower that puts you at around 510 hp max which would put you around 410 at the wheels. If you assume 3500 lbs with driver, the ET calculator below puts you at around a 11.9 in the 1/4. The head work, fenders additional boost and meth injection will help, but my guess for your new times is 11.5-11.7 range.
Et calculator

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It will be interesting to see what it runs. I hope you get the numbers you are after. I have just been dissapointed too many times at the track an dont want the same for you.

Sounds like a good idea. On a 355 I would probably go with the 195 eliminators though.

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