383 LT4 Hotcam Dyno 2003

[marv02]

My Engine comb using Dyno 2003 Engine Program.


1986 C-4 Coupe
383 4 bolt main (10.7 to 1) Balanced, Flat top pistons, LT4 Hotcam 218/228 @ 0.50 .525/.525 lift Duration 272/281 CL-112 (CL on intake 108), 1.6 RR Arms CC Ultra Magnuim Steel, Trick Flow Heads Super 23 (195 runners) 62cc , SPL runners Hi Flow intake base, 24# FIC Bosch 3 Injectors, Chipped PCMforless.

700r4 Trans built, 2500 Stall Lock up Convertor, 307 rear end.

403 H/P @ 5000 RPM's
498 TQ @ 3000 RPM's

 

[grumpyvette]

While thats rather impressive, and its a very good match to the current rear gear and stall speed, while your planing the combo, why not try swapping the data in your dd2000 to these two different cams, both installed 4 degrees retarded and see if you like the results better, yes it will require a 3.73:1 rear gear and it will require a 3000rpm stall converter, but it might be worth it.


THIS IS MY CURRENT CAM

THIS IS THE CAM (below) I RECENTLY TOOK OUT BECAUSE IT WAS JUST A BIT MORE THAN I WANTED TO PUT UP WITH IN A DAILY DRIVER CAR< BUT IT MADE MORE HP THAT THE CURRENT CAM AND IT CERTAINLY WAS NOT UN_DRIVABLE ON THE STREET BY ANY MEANS

related info

viewtopic.php?f=52&t=3802&p=18031&hilit=119591#p18031
(CRANE CAMS USED TO SUPPLY MANY G.M.PERFORMANCE CAMS,
Chevrolet Performance LT4 Hot Cam Hydraulic Roller Camshafts 24502586

this is no longer true and QUALITY has dropped off noticeably by who ever is currently supplying the cams)

 

[marv02]

I have a leaking rear main seal so I have to pull the trans any ways I thinking to step it either to a 3200 or 3400 Stall convertor.

I looked at moving the cam timming in either direction I like it straight up that so far giving me the best all around numbers.

I think this is a good combo for a DD stret motor that should still pass Ca Smog I will find out soon it due for smog check next month.

While thats rather impressive, and its a very good match to the current rear gear and stall speed, while your planing the combo, why not try swapping the data in your dd2000 to these two different cams, both installed 4 degrees retarded and see if you like the results better, yes it will require a 3.73:1 rear gear and it will require a 3000rpm stall converter, but it might be worth it.

 

[marv02]

I don't what to run to steep of a rear grear in the car i dont want to be running a high RPM's up on the HWY I do mostly HWY driving around where I live as of now I am turning 2250 RPM's at 70 MPH.

And getting 22 to 24 MPG doing so but when your foot in forget about it LOL.

 

[marv02]

I put in you're cam numbers yes I will pick up some more HP but I dont like the TQ numbers for what I use the car for.

The car spends most of the time in the idel to 2500 Range once in a blue moon I rev the car.

I think some deeper rear gears will be what I look for more grunt out the hole.

I have Thrush 2 chambers on the car now at first there are fun but at 45 to 55 MPH it getting to be to much drone I looking at FlowMaster bolt on 50"s.