I am trying to find out what my engine combination should produce in terms of hp and tq.

383 sbc
400 cast-steel crank
forged flat top pistons 0.030 over
Crane 242@50 - 252@50 HYD Flat Tappet
.516 int - .525 exh lift 106 LSA
1.5 Aluminum roller rockers
Sportsman II 200cc heads
Block has been notch for 400 sbc rods
Press fit piston pins
Victor Super intake with Holley Race 830 cfm carb
Pertonix HEI Race Dizzy
Stock water pump
Carter Street mechanical fuel pump
Turbo 350 trans
9 Bolt 4.10 rear disc
90/10 struts
Car Weight 3550lbs. with me and half tank of gas
1 3/4 SLP headers
3" complete exhaust
Sphohn Torque Arm
Lakewood LCAs
AC Delco R42T plugs

 

Well, according to the ever so honest desktop dyno. You would have 387hp @ 6000 rpms and 385tq @ 4500 rpms. Mind you i guestimated 10.5:1 compression and a full exhaust system.

 

I ran it through my Desktop Dyno with a 10.0-1 comp. ratio, do you know exactly what your comp. ratio is? that'll help me, i dont know about anyone else. Im new at this, been playing around for a few days, but this is what i came up with.

407HP @ 5500rpm
431TQ @ 4500rpm

pretty sure this accurate, but somoene else run it with a little more experience and see how close i am.

 

You'd need all the cam specs to come up with anything meaningful.

 

Too many specifics not included to get an accurate guess. Having head flow numbers would make it more accurate. 64 or 72cc heads?

Numbers I come up with as a guess are

407HP@6000
389TQ@5000

These are flywheel numbers.

 

I have all the cam specs, I just need to know what to look for on my spec card. Doesn't make sense that I am getting 2 very different reply from DD. And the compression should be 10.8 to 1 with 64cc heads. And would changing to a flat tappet solid cam be an improvement? Here is the info on the current cam:

 

Sorry, here are the cam specs

 

Or would this solid cam better a better fit performance wise?

 

Well that 300 degree monster is probably too large for those heads.

 

Just be careful. DD2000 has a tendency to exagerate low speed torque, especially using a solid cam.

This is also through mufflers.

 

BTW, here are the specs I entered to get those results.

Oh. Looks like I was 1* off on the IC

Don't worry. It won't make or break the results.

 

I have compression of 10.8 to 1 and large tube headers

 

with large tube headers and 10.8 comp:

449HP @ 6000
457TQ @ 4500

 

Thanx guys

 

Why don't you put that picture in your sig instead of attaching it each time?

(Just a random out-of-curiousity thing)

 

I can't figure out how to put in in my sig.

 

it has to be hosted somewhere, and when it is, you just put the link in your sig. box in your user cp just like you would a regular link. do a search if you dont understand what im saying, youll find it there

 

It's generally considered bad form to attach your signature to every post in a thread anyway.

 

I am still trying to get it in my sig and having a hell of a time.

 

Change it to <IMG SRC="http://www.cardomain.com/ride/2158035">

Your sig changes on all your old posts when you change it.

 

Do I just copy and paste this into my Sig along with the engine details?

 

Yup.

Then try to only include your sig on only your first post in a thread

 

Do you know what "large tube headers" means to DD2000?

No?

Do you know what defines "large tube headers"?

No?

Are you sure your compresstion is 10.8:1 and not 10.79:1 or 10.81:1?

No?

Then take your free dyno sim for what it's worth. It's a guess that a computer program makes based on information that you enter. It's not a real dyno.

 

Large tube headers I thought is anything bigger than 1 5/8" for a sbc engine.

According to the piston part# and 64cc heads, that is what the compression should be when I looked it up.

 

That's just it.

How many answers have you gotten so far? And how many are the same?

Why?

Because you're basing this all on stuff that parts suppliers say something "should be"?

Do yourself, as well as everyone else a favor and buy your own DD2000. They're cheap as hell anymore. I've seen DD2000 for free when you buy a can of Pepsi at the local Food Mart.

 

he's just trying to get an accurate reading on what his power is going to be, and going from 10.0 to 10.8 comp ratio is quite a bit i think, i ran both numbers and both were very different.

 

From the DD2000 manual

Since SBC exhaust valves are normally 1.60", 1-5/8" tubes would be considered small. 1-3/4" tubes would still be considered "small tube". 1-7/8" primaries would be just starting to get into the large tube range. 2" primary tubes, which would be considered a full race header on a SBC, would be large tube.

My BBC has 1.88" exhaust valves and 2-1/2" primary tubes. This is considered "large tube"!

My 2-1/2" primary header tubes are about the same size as most car's exhaust pipes