Desktop Dyno [Archive] - Chevelle Tech

: Desktop Dyno


RedSS454
May 23rd, 04, 5:47 PM
Hi guys. I was wondering if anyone could run a Desktop Dyno for me? The only thing is, this is my first engine that I haved parted together (I have built one, just with stock parts, so no real guess work involved), so some of my parts may not work together, and if you could help me out I would much appreciate it. The stats on the buildup are:
Block- Big "M" BBC, bored to 4.600" with a 4340 Forged 4.375 Stroker Crank

Heads- Dart BB Pro 1 - 345 CC Intake Runners, 119 CC Chambers 2.30/1.88 - 1.625D (I am assuming diameter of the valves :confused: )

CR- 9.9:1

Pistons- JE Forged Flat Top Pistons
5140 Forged I Beam Rods, bushed for Full Floating Pins ( :confused: )

Cam- I got confused a little here. The one I picked first said it needed a high Compression Ratio, and I don't know what to consider "High". That was a Crane "Saturday Night Special"
Lift-714 .714 / 250/258

My other choice was Comp Cam XE294 H (588 .593/ 250/256) If anyone can point me in the right direction, I would appreciate it. I don't care about milage or anything like that.

Rockers - Harland Sharp Roller Rockers 7/16 -- 1.7

Intake and Carb - Weiand Stealth Intake
- Holley 850CFM 4 Barrel Double Pumper

Distributor - Proform (Part number PRO 66941R from SDPC2000.com)

Again, something will probably not work right,so if you would please point it out, and help me a little I would really appreciate it. PLease bare with my stupidity, and thanks for anything you can do,
Chris
graemlins/thumbsup.gif

Bad Rat 414
May 23rd, 04, 6:18 PM
I got 575 lbs. of tourqe and 550 HP. That's useing the XE 294H. You might want ot try the Comp. Cams 290 HR. It came out with 600HP. and 650 lbs. Tourqe.

-SS454-
May 23rd, 04, 6:58 PM
I get 603 hp and 657 tq with open exhaust, 2 1/8 headers, and SAE condtions, with the hydraulic cam. 634 hp, 694 tq with dyno conditions.

I think you need more compression, a bigger solid, or solid roller, at least a big hyd roller, a good single plane, and more carb. So....

With 10.65:1 CR, single plane, 1150 cfm carb, and a solid roller (264/272, .680/.680, 110 LSA) it made 740 hp @5500, and 761 ft-lbs @4500. 705 hp, 727 tq on SAE condtions respectively.

I was using Engine Analyzer v3.0

Bad Rat 414
May 23rd, 04, 7:41 PM
I used DDD with large exhaust and mufflers. It's strange the differance you can get with differant software. This only goes to prove this is just a rough guideline.

mr 4 speed
May 23rd, 04, 8:26 PM
Me don't think you need those heads..what are your ET/performance goals?

RedSS454
May 24th, 04, 6:09 AM
Originally posted by mr 4 speed:
Me don't think you need those heads..what are your ET/performance goals? Not really any ET goals, this is going to be a street car. Like I said, I have never really peiced an engine together out of a catalog, so I just assumed bigger is better. The goal is just lots of low end torque, and enough HP to get up to "crusing speed" quickly. I was hoping for around 600/600 maybe more. Any help is appreciated.
Chris