i was wondering if one of you fine gentleman with a desktop dyno would mind running the following combination through your software.

383ci
9.5to 1 cr
hydrolic cam 234/244/ at .50- and 487 intake 508 exh,on a 112 lsa
edelbrock air gap
vortex heads with 2.02/1.60 swirl polished
edelbrock 750 mech. secondaries
hyper. pistons
and msd 6al
its in a 67 with a four speed (m20) a 12 bolt with 3.31 and 28 inch tall tires. is it concievable if i could get it to stick that my car would be in the low to mid 13's or am i all wrong my old 327 not much to brag about got the car to 14.9 and was slip sliding all over the place. Thanks in advance for the help.

ryan

I think low to mid 13's are definitely possible with what you have.

With that cam (performer rpm?) mine got 375 HP @ 6000 and 370 TQ @ 4500. Do a search on those Edelbrock cams, not a great rep.

For your info I ran it with a comp XE274 and got 400 HP @ 5500 and 436 TQ @ 4000.

thanks guys for the wuick replies and i hope i can get my car into low to mid 13's maybe if i had somebetter gear with a possi. or maybe a locker it could even be better hmmm.... oh sorry i was off day dreaming again. thanks again guys and still if anyone has a desktop dyno. if you dont mind i would appreciate my engine specs being ran. thanks again.

ryan

anyone?

344hp@5000 ,428tq@3500
ET 13.122 @ 107.6

one more question am i right in guesing that number is at flywheel or is it at the grond and i think again its probably at sea level. thanks again guys cant wait to hit the strip as soon as it warms up a bit. :hurray:



ryan

800ft 70*
hp flywheel

still if anyone has a desktop dyno. if you dont mind i would appreciate my engine specs being ran.

Do you think I'm a walking dyno?:)

My numbers were from dynosim, probably a little lower than you were expecting. These are flywheel numbers and although they aren't exact they're probably closer than most of the magazine numbers you see.

Imho, you are at too low a CR. for that cam!!

That's the E-brock RPM cam, isn't it??

pdq67

thanks guys for all the information, and twins fan i thought you were a walking dyno.:D and pdq67 i think it is a ebrock cam but i cant remember, i have something to confess guys, this motor(my actual motor) is a crate motor, which i might add was a great investment. anyway i was just wondering what you guys might come up with cause the dyno sheet i got with the engine (the dyno sheet is for my particular engine) says the hp is 405.6 and 438.7 tq., please dont hate me i was just wondering what ya'll might come up with :yes: . and i dont think the cam is too big i love the idle it has and it was a little akward to learn how to drive with my muncie but i was also coming from a pretty stock 327. anyway i was justing wondering cause likei said i am waiting for the weather to warm up a bit before hitting the track and form what ya'll said my goal of around low 13's is possible i will be pretty happy. thanks again for evrything. :beers:

ryan

Dyno software has lots of stuff that can make a difference when running it like head flow data carb data and alot more small details that you did not give so what you got was a close approximation.
In your drag sim that I did I used a close ratio Muncie but the wide ratio Muncie what have resulted in 5 tenths slower time also tall tires slows you down with your gear.

No offence but with that cam & comp along with rest of setup i think the 350hp/400+trq est is fairly realisitic & close to reality but may be a smidge low IMHO. I could easilyt believe 365-375hp/400-425 trq. with your motor but the auctuall 400+ actual dyno result may be a little too high.

You have to remember some dyno's are not as accurate as others esp if it has not had some kind of factory service/calibration (if thats ever done) for a long time to keep it honest.

Scott

ok guys i got another question for you. my car at idle (about 750-800rpm) bogs real bad when i mash the gas, not in gear taking off just sitting at idle, takes a little to catch up with itself. also when i am at around 2000rpm in first or second and mash the gas it does the same things sputters and such and then "comes alive" with all of my new found power. what could this be, i have the initial timing at 10 deg. and tomorrow i am going to put timing tape on it and set the total timing at 34 or so. do ya'll think this will fix my above stated problems or am i not getting enough fuel, too much fuel, and then i started to think the accelorator pump is not giving enough gas. but then i second guessed my self and talked myself into just posting the question on here. thanks in advance and in case you forgot my engine specs are as follows...:confused:


383ci
9.5to 1 cr
hydrolic cam 234/244/ at .50- and 487 intake 508 exh,on a 112 lsa
edelbrock air gap
vortex heads with 2.02/1.60 swirl polished
edelbrock 750 mech. secondaries
hyper. pistons
and msd 6al

ryan

takes a little to catch up with itself

Sounds like it's just the cam and compression. That cam just isn't going to have much power on the bottom end.

Your engine is set up pretty good, but the cam doesn't make the most of it. Put a cam change as #1 on your improvement list.

ok that would make sense about the "taking a little to catch up with itself" but what about the bog that happens just sitting at idle. i think either to much gas or not enough timing???

Just a guess here. You say you have mech. secondaries, when at idle with no load on the engine all four barrels will open up when the gas is mashed. The engine might be just sucking wind:) for a couple seconds. As in taking in too much air or fuel or both with no load to work with.

I've never had a carb with mech. secondaries, so I could be way off base. On the Holley with vac. secondaries, they won't even open when mashing it at idle, or at least they shouldn't.

Bumping up your timing sounds like agood idea too, get that set first.

yeah that sounds like a good plan, i bought some timing tape today so i will give it a try tomorrow. thanks guys.


ryan

sorry to bring this back up but since my cam does not seem to be matched up perfectly, what cam might ya'll suggest, hopefully one with some crakle to it!!!!