about 750 edelbrock

[66monaco]

new 750 proform mech ordered! should arrive next week! I think I'll past on the cam chainge for this winter, theres so much other things to do for it...I'll test how it run and work on new carb and those 3.55 rings....and I'll try to find here a good dyno, where to tune it and get the facts! I can change the cam, any time in the summer ,at my work or my garage. And I'm gonna buy somekinda vacuum reservoir for the lamps ja power brakes

[firefighter3931]

The PF 750 is a very good choice.  It will be much easier to tune and make consistent power throughout the RPM range. You might have to install a lower rated power valve to clean up the idle....but you won't know that until you install it and start tuning. 



Ron

[66monaco]

cool! yep, there's gonna be some tuning to do, in the spring I allready have air/fuel ratio ja vacuum meters installed in the dash, so it should be easy 

[Ghoste]

   Keep us posted.

[66monaco]

new proform, valvecovers and msd 6al installed! 

[kamkuda]

Purdy,  How does she run now?

[66monaco]

haven't tryed yet, there still lots of things to do, electric fuel pump, trunk painting, hifi installions etc little stuff   and it's winter now, we'll see in the spring I'll try to get it to the dyno...so then we get the facts!

[66monaco]

previous owner drove that 13.2 / 1/4m. with slicks....hopefully I'll do atleast the same with 275/60r15 street tyres...now 

[66monaco]

I got a time for a dyno! May 11th we get facts!   and car is almost ready! just "wax on, wax off" !!  

[skip68]

   Keep us posted.

[73 charger]

i have the 750 edelbroch....had to change fuel line from 5/16 to 3/8.  car bogging on track 80-90mph.   much better now.   60 foot times less than 2sec. 

[Beer]

i have the 750 edelbroch....had to change fuel line from 5/16 to 3/8.  car bogging on track 80-90mph.   much better now.   60 foot times less than 2sec. 

What are you running in 1/4?  We have comparible setups.

Jim

[73 charger]

My 73 with 3/4 fuel and me in it weighs 4140lbs.   So far best 1/4, 5 Apr 09 @2:23 pm, Budds Creek, MD.  13.805 at 100.91 mph.  Since then upgraded fuel system...waiting for weather to improve to get back to the track!  My 408 dyno results with TQ 459.85lbft @3900, Cpower 386.13 C_HP @5200.

Mike

[66monaco]

well today I was at dyno... 374 rwhp... didn't get torque 'cause there was just kW gauge, and he didn't get right rpm's but I'm glad, I expected around 350... so it's good! and did a little highway testing too... 139mph and shift light went on (set to 6000)..and it would of liked to go more...still I have to work on distributor, it gives too much advance, over 30 deg...man who dynod, said to limit total timing to around 36 and put basic way up to 20 deg...
heres few pics too, one from dyno place and one from those ram air system..

[Ghoste]

Good work, it's always nice when you exceed your expectations.

[66monaco]

yep! 

[73 charger]

Can you post pictures of your intake collection?  I need to add a cold air intake my self!!   Where did you get the intake?  I was trying to decide connecting to the cowl vs under radiator support like you have!!   My 1/4 mile time improved to 13.783 fri eve!

Mike

[66monaco]

i try to take more pics from it, why I can. the air cleaner box is bought from spectre performance  http://www.spectreperformance.com/#CATALOG
and air tubes are just basic house ventilation tubes.. and they go trough the inner fenders to front lower valance, which allready had couple of holes, just the right size, where to fit tubes. and i allso made little spoilers so it get air easily... heres couple pics where to tube comes from inner fender to valance.. and one pic from freshly painted trunk... 

[firefighter3931]

well today I was at dyno... 374 rwhp... didn't get torque 'cause there was just kW gauge, and he didn't get right rpm's but I'm glad, I expected around 350... so it's good! and did a little highway testing too... 139mph and shift light went on (set to 6000)..and it would of liked to go more...still I have to work on distributor, it gives too much advance, over 30 deg...man who dynod, said to limit total timing to around 36 and put basic way up to 20 deg...
heres few pics too, one from dyno place and one from those ram air system..

Very Nice....excellent results for a 383 !  So i guess it's safe to say you're happy with the new Proform carb ? You must have noticed a huge improvement in drivability and power 

Your Dyno guy is correct....that 292 cam will want 20* at idle and 36-38* total....all in by 2500-2800 rpm. Too much total advance will reduce top end power.

Nice job on the fresh air intake system....that's worth some power. 



Ron

[66monaco]

Thanks Ron!  tomorrow I'll work on the distributor, hmm, should I limit mechanical advance on the "end" of it movement or in the beginning? And quess I should limit movement almost half? and should I use lighter springs? or should I just take the heavier spring off? So I'll get total timing in around that 2600-2800rpm? I use mopar dist.

[firefighter3931]

Thanks Ron!  tomorrow I'll work on the distributor, hmm, should I limit mechanical advance on the "end" of it movement or in the beginning? And quess I should limit movement almost half? and should I use lighter springs? or should I just take the heavier spring off? So I'll get total timing in around that 2600-2800rpm? I use mopar dist.

Limit the travel at the end....if you get the slots sized to .375inches that will be close enough. This should give you ~18* of mechanical advance. The newer MP distributors have torx button screws and adjustable stops to limit advance. The older distributors will require some welding and possibly some file work to dial in the slot size. If you have a MIG available....zap the end of the slot and file if need be. 

For the springs....remove the heavy spring and replace with a light spring. This should dial in the curve where it needs to be. 


Ron

[66monaco]

yes I have mig at work. I'll "tune"tomorrow thanks again Ron very much!

[73 charger]

Thanks for posting pics!!! This gives me some ideas!   I am placing a Hurst Line Lock on the car this week for next track day!  Then I'll takle the cold air induction!!! 

Mike

[66monaco]

cool! I have line lock too..

now the slot are about .590" and basic advance is around 18 and it starts good, but total advance don't rise above 22.....quess i have to file little more   and i notised that there a big cap between p and D! idle is around 900 at P and now when I put first, engine allmost stops...

and damn, that highway speed test quess didn't do good, now theres a little clank at the right side of engine and it sounds like bearings...!! lets hope not!

[firefighter3931]

cool! I have line lock too..

now the slot are about .590" and basic advance is around 18 and it starts good, but total advance don't rise above 22.....quess i have to file little more   and i notised that there a big cap between p and D! idle is around 900 at P and now when I put first, engine allmost stops...

and damn, that highway speed test quess didn't do good, now theres a little clank at the right side of engine and it sounds like bearings...!! lets hope not!

If the total advance isn't moving past 22* then your weights are sticking....you need to find out why. 

I like to ide them up at 850+ in gear....i don't worry about the idle speed in neutral. A cam that big in a 383 is going to have a pretty nasty idle anyway. 

Hope the engine isn't hurt. 



Ron