I have a 289 Windsor which I plan to improve but I'm unsure about a couple of things and would like some engine simulations done.

Could somebody please simulate my engine with both of the cams listed below using both a 525 (BG Road Demon) and 575 (BG Speed Demon) (4 simulations in total).

It would be appreciated if you could post up the 4 simulated power and torque curves for me. I am only really intereseted up to 4000rpm.

If you can suggest improvements to improve the power a torque curves below 4000 rpm it would also be appreciated.

Sorry to ask so much.

The details of my engine and the cams are as follows:

ENGINE:
Engine Size: 289
Bore: 4" Stroke: 2.87"

CAMSHAFT
COMP CAMS

GRIND NUMBER FS XE256H
HYDRAULIC
INT EXH
DUR @.050 212 218
MAX GROSS VALVE LIFT .477 .484

DUR @ .006 TAPPET LIFT 256 268 LOBE CENTERLINE 110.0

VALVE TIMING OPEN CLOSE
.006 INT 25 BTDC 57 ABDC
EXH 69 BBDC 21 ATDC

OR

GRIND NUMBER FS XE250H
HYDRAULIC
INT EXH
DUR @.050 206 212
MAX GROSS VALVE LIFT .460 .474

DUR @ .006 TAPPET LIFT 250 260 LOBE CENTERLINE 110.0

VALVE TIMING OPEN CLOSE
.006 INT 19 BTDC 51 ABDC
EXH 64 BBDC 16 ATDC

CARBURETTOR
BARRY GRANT
525 OR 575CFM


INLET MANIFOLD
WEIAND #8124 (DUAL PLANE SIMILAR TO EDELBROCK PERFORMER)

EXHAUST
SMALL TUBE HEADERS WITH STRAIGHT THOUGH MUFFLER (3” SINGLE)
HEAD
LIFT 0.2 0.3 0.4 0.5
INTAKE 110 130 162 168
EXHAUST 72 97 116 121

TESTED WITH 1.84” INLET AND 1.54” EXHAUST VALVES (SAME AS THOSE WHICH WILL BE FITTED)
@ 28"H2O

ROCKER RATIO: 1.6
COMPRESSION RATIO: 9.8

FUEL
98 OCTANE GASOLINE


Kind Regards,

Matthew Lamb

 

download the cam simulator from comp cams web site it is free

 

free and useless

1. according to this thing with all details (headflow etc) and a specific cam from em my engine makes 400+ horses. desktop dyno is more realistic with 340ish

2. the cam selection (best fit) is selected on engine ci and compression and weight. nothing else.
so even if you change the heads etc it will change the predicted HP, but the cam will remain the same, even if you re-run it.
it doens't take into consideration any gearing and driveline either.

utter crap, but colorful ..

EDIT: MATT, i saw your private message, but i have no idea how lolng it was there. forum doesn't notify. sorry.
I'm in Dublin, but I can see if I get to it when home next week

 

I would go with the bigger cam, I havent looked at the specs but I bet the two cams have identical ramps, also with the 9.8 compression the slightly larger one will work better. as far as carbs if they are both annular booster versions go the 575 cfm.

I dont have desktop dyno but I could guesstimate about 250fwhp from that combo.

 

just for the carb decision. desktop dyno will show very very little difference when i select carb to be 525 or 575

if the 525 flows enough it will be the better one for better throttle response.
For a carb decision since you go with BG, tell them what you have and they'll point you to the correct carb. They are official enemies of overcarbing, so they'll direct you to the proper one

Kalli

 

Thanks for the replies. kalli it would be great if you could run it through for me. No worries on the PM the forum doesn't notify me for anything either.

By the way the carbs are both annular booster with vacuum secondaries. Specs can be found at:

http://www.barrygrant.com/demon/defa...=29&specs=29cc

 

as long as your engine is a female v8 and not a male version i can stimulate it :P

 

He saied simulate......rerere, vrooommm, vrooommm, bbaabbaa, ppaappaa, bbaabbaa. Thats with a mild cam. I can give you a more lumpy cam if you wish......






sorry, I'm no help to you guys with your fancy carb thingies...But I can entertain...

 

i know it was a joke

 

At least you guys are keeping my thread at the top of the list.