Dynoing new 408 this week. what will it make? ::: EDIT numbers are in! :::
#1
Dynoing new 408 this week. what will it make? ::: EDIT numbers are in! :::
Just got my new 408 together at the engine builders and it is scheduled to be on the engine dyno this week. What do you guys think it will make? my goal was 675HP on motor then hit it with maybe 400 shot.
408 cubic inch
6.0L Iron block. 4.030" bore
Dragonslayer 4" stroke crank
Compstar 6.125" rods
Diamond custom pistons with gas porting.
12.5:1 compression on 110 fuel
hydraulic nitrous cam 251/266 .632/.595 112+4
BTR ported Trickflow 245's w 70cc blended and polished chambers,nitrous exhaust ports, 2.10 and 1.6 valves.
BTR ported super victor intake
1" spacer and nitrous plate
accufab 4150 throttlebody
2" kooks long tube headers
If all goes well I will post up numbers next week.
408 cubic inch
6.0L Iron block. 4.030" bore
Dragonslayer 4" stroke crank
Compstar 6.125" rods
Diamond custom pistons with gas porting.
12.5:1 compression on 110 fuel
hydraulic nitrous cam 251/266 .632/.595 112+4
BTR ported Trickflow 245's w 70cc blended and polished chambers,nitrous exhaust ports, 2.10 and 1.6 valves.
BTR ported super victor intake
1" spacer and nitrous plate
accufab 4150 throttlebody
2" kooks long tube headers
If all goes well I will post up numbers next week.
Last edited by midwestjunk; 06-04-2015 at 09:30 AM.
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#8
Last min decided not to pull my wire harness out of the car and bring the PCM to the dyno. Kind of a hassle. So, I put a 750 carb on it because that's all we had laying around. Broke in the motor that way and made a pull for the hell of it with the small carb. 662hp/551tq with 33 degrees of timing on 110 fuel.
I have found a 950 carb which will be closer to my 4150 throttlebody that will actually be on the car. Slapping it on now to see what it gains. I should have numbers with that on there later today or tomorrow. Hoping for 680+HP.
I have found a 950 carb which will be closer to my 4150 throttlebody that will actually be on the car. Slapping it on now to see what it gains. I should have numbers with that on there later today or tomorrow. Hoping for 680+HP.
#9
Last min decided not to pull my wire harness out of the car and bring the PCM to the dyno. Kind of a hassle. So, I put a 750 carb on it because that's all we had laying around. Broke in the motor that way and made a pull for the hell of it with the small carb. 662hp/551tq with 33 degrees of timing on 110 fuel.
I have found a 950 carb which will be closer to my 4150 throttlebody that will actually be on the car. Slapping it on now to see what it gains. I should have numbers with that on there later today or tomorrow. Hoping for 680+HP.
I have found a 950 carb which will be closer to my 4150 throttlebody that will actually be on the car. Slapping it on now to see what it gains. I should have numbers with that on there later today or tomorrow. Hoping for 680+HP.
#11
Engine builder called this morning said the 950 carb we found wasn't a high end carb like the 750 we had on it was, so it didn't gain what it could have. although he didn't mess with jetting as we are running out of time for the deadline I gave him to pick it up. He said it made around 670HP with that carb. peaks 7,400rpm. I guess its not bad for slapping some old carb on it and not messing with anything on the carb.
Any Idea if the motor would have made more power if I had my 4150 TB on it with my fuel injection? He thinks it would have done a few HP more, maybe hit that 680HP mark I was looking for. I'll slap it in the car, wire it up and bring it to the chassis dyno with my tuner and see what we can put down at the wheels next.
Any Idea if the motor would have made more power if I had my 4150 TB on it with my fuel injection? He thinks it would have done a few HP more, maybe hit that 680HP mark I was looking for. I'll slap it in the car, wire it up and bring it to the chassis dyno with my tuner and see what we can put down at the wheels next.
#12
I used:
CUINx1.25 = Peak TQ
Peak TQ x.90 =
90%ofPeakTQxMaxRPM/5252
408x1.25 = 510
510x0.90 = 459
459x7500/5252 = 655HP
510TQ @ 7500RPM
With the correct valve train parts it shouldn't have a problem going to 7500rpm.
Too bad you couldn't try a good bigger carb 950cfm+, I think you can go past 680fwhp.
What are you expecting it to run on motor and on spray?
how heavy is the car?
CUINx1.25 = Peak TQ
Peak TQ x.90 =
90%ofPeakTQxMaxRPM/5252
408x1.25 = 510
510x0.90 = 459
459x7500/5252 = 655HP
510TQ @ 7500RPM
With the correct valve train parts it shouldn't have a problem going to 7500rpm.
Too bad you couldn't try a good bigger carb 950cfm+, I think you can go past 680fwhp.
What are you expecting it to run on motor and on spray?
how heavy is the car?
#13
car weighs 3,315 with driver and full bottle. Should run mid 10's on motor I'd think. I'm going to start out at 200 shot and work my way up to 350 shot. The goal is 8.99 this season. Next season I will take the plate off and put a fogger on it and spray 4-500. get it going mid 8's hopefully. The plan for the car is an 8 sec car with leather interior and radio that I can drive to work.
#14
What rear gear do you have in it?
I think it could be closer to bottom 10s N/A.
250 shot should put it in the 8.80 range, if the suspension is doing what it needs to and the tune up is good.
I think it could be closer to bottom 10s N/A.
250 shot should put it in the 8.80 range, if the suspension is doing what it needs to and the tune up is good.
#15
3.73 gear, 28x10.50 tire. Stock trans gearing for a TH400. Suspension is madman custom valved double adjustable AFCO shocks with wolfe racecraft weld in adj spring perches with 150lb rear springs. All UMI adjustable rear control arms, TQ arm ect. with anti roll bar. Front is racecraft K member, A-arms and qa1 coil overs.