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Old 09-06-2003, 10:16 AM
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355 lacks power

I have a 355 that I think should be much quicker. It has a Comp Extreme 274 hydraulic Cam Dur@ 50 is 230-236, lift is .490 then with my 1.6 long slot rockers is .523...in and out.Holley stret fuel pump... I have a Edelbrock 600 cfm manual carb and Edelbrock rpm heads. A Flamethrower distributor and shortie headers. The rest of the exhaust consists of a couple of flex pipes and 2 cherry bombs. It has a 2400 stall from B&M.

When I put the 700R4 in 1st, then 2nd then 3rd all manually with it floored it moves but I thought I should have over 400 ft lbs of TQ and HP. This car isn`t much better than my 305, it`s got more top end but my 1/4 mile stayed at 14.7.

My 3300 lb car should be at least in the low 13`s.

I know my exhaust needs upgrading but what else is holding me back?? Many say a 750 cfm carb is too big, is this my missing link? What about my 1.6 rockers? Should I stick with my 1.5 rockers???...or perhaps just put 1.6`s on the exhaust side?

Or...is my power range just higher than I anticipated???

I believe my timing is Ok, I`m at 12-14 initial , then it`s all out by 2500.

Any help!! Thank You.

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Old 09-06-2003, 10:45 AM
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what is your rear end rear and tire size. with 15 in rims you should have 3.73 or better and try a distributer recurve kit
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Old 09-06-2003, 11:49 AM
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I have 3:73`s posi
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Old 09-06-2003, 03:00 PM
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I never did like the edelbrock carbs for most power. I think they are rated a little conservatively. Although I've never run then through any flow bench testing to prove so. I do believe edelbrock recommends the 750 for their RPM heads though. You should be running better than those times. I'd say it's all in the tuning and driver technique.
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Old 09-06-2003, 03:36 PM
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What heads are you running? If you a cam with a big lift (over .500") with out doing any head work you actually start to loose power. Too see if this is the case, I'd switch back to 1.5 rockers and see if it helps. If it does, you could just stay with the 1.5's or have your heads ported or replace them with better flowing aftermarket heads.
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Old 09-06-2003, 04:49 PM
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I wanted to hear a few replies...I DO agree since I drove the new engine only 2x that my technique needs some improvement.... But Have alot of $$ into a slow car.

I must lean towards my Carbs too small or my lift is too high for this combo.

Anyone agree?
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