et help

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what to do to get the best out of my car? i have a dart with a 414 small block b1 heads, 13 to 1 comp. 620 mopar cam. 950 hp carb. 4800 dynamic conv.in a 727. 4.56's ladder bars and coilovers, qa1's. 10.5 by 31 tires car runs 10.6-10.7 at 3800' air in good air 10.44- 10 55. should it run faster?2800 with me in it. most everyone one here with a similar combo is quicker. where should i start to adjust, or make changes? thanks

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jn responce to the intake. koffel's said they tested a bunch of intakes and the torquer made the most power, i don't know. also mr p body i am leaving at 3500 and shifting at 6000.

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Can you give the cam specs at .050.... and what the
cam is installed at(centerline)... thats some REAL
low rpm's to be shifting at unless its a all torque
engine

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mopar performance doesn't give specs at 50 and i do notknow what centerline it is installed at. tje motor made 565hp at 6500 and 550 fi lb torque at 4800. i am wonering if there is more with this combo or not. best at norwalk 10.44at 126 with old convertor. thanks

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Well if it makes peak power at 6500 why are you shifting
at 6000

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Mr.P,
Mopar advertises that cam's duration @.050 as 275.
I think in real world measurements they are 282 @.050.
It also has a lobe separation of 106,might be part of the problem with his stroker?

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If it has a duration that high he needs to really step
up the revs.... but the intake and probably the carb
are holding it back... if he would post the time slip
it would help alot....with the 106 LSA he should have
all sorts of low end power and have some decent 60' times

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mr p body here are some number from fall at norwalk. some the best.60' 1.464 330 4.269 1/8 6.652 @102.66 1000 8.733 1/4 [Email]10.52@124.91[/Email] 60' 1.473 330 4.283 1/8 [Email]6.671@102.75[/Email] 1000 8.759 1/4 10.549@ 125.46 these numbers are with the old 4200 t/a convertor just before it went south. this was also in good air. i am looking to improve what i have not to change too much. thanks for your help.

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By chance, you arent using MP valve springs are you?
The 60' is soft for a 2800# car.... but the whole
pass is soft

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i don't know for sure about the valve springs i will check. why are they bad, soft ,not enough pressure or what? thanks.

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Way under pressure for what you really need. I ran
them 1 time(full season) and from the moment I let go
of the trans brake I went to valve float for the whole
run... never broke them and thankfully they went into
coil bind before the valves hit the pistons.... I
figured they were just worn out but when I checked
the new springs to replace the old ones... they were
identical pressures.... junk

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At 2800 lbs you should be well into the nines.

4.56 and 31" tire will work good. I think the cam is in need of improvement,

5300-5400 for converter would work better too.

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Opps, misread it. Thought it said 33's. I still would have went 4.88 even with 31's. The 4.56 will suffice, but the converter is light, the intake is all wrong and the cam is so 20 years ago

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how about a 2" spacer ? will that help any? how is the mopar m1 single plane? stock jetting in the hp should it be more it is 79's

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I'd look at camshaft, converter and swap for a Victor 340.

I realize nobody wants to start spending money on an engine
they already paid good money to have built but, no spacer is
going to pick you up .5 second.

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Have you tried the new converter yet? I agree that a 5500 flash converter would work better. And I think the 950HP carb is perfectly fine, I doubt you'd go any quicker with a different carb, a Dominator may only be a couple hundredths quicker just going by my results on an Eddy headed 451 big block.

I also agree that you should shift it at 6500 and trap a couple hundred above that(6700).
I like the MP 590 cam alot better than the 620 so that may be something cheap to try before spending $1200 or more for a full roller setup.
Got any pics of the car?

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Dom, I was just saying that from the start I would have went with a dom as there's room to grow with it. The 950 is fine as he said the heads are only mildly ported. The cam, converter and intake to me really stand out as issues in this combo. Is this car strickly raced, or is it street driven as well?

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565hp at 6500 and 550 fi lb torque at 4800. i am wonering if there is more with this combo or not. best at norwalk 10.44at 126 with old convertor. thanks

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He did say he wanted to optimse his current set-up.

He definitely isn't seeing 565 HP, running 126 MPH @ 2800 lbs.