Got some dyno numbers and have some questions
07-26-2008, 11:54 AM
#1
Got some dyno numbers and have some questions OK, I got my 402/F-1R combo (spec in sig) dynoed yesterday and was alittle disappointed with the results. According the the DynoJet, temp was 84F, humidity was 36%, barometer was 29.4, SAE correction was 1.02. One the hit of the throttle, my AFR started at 11:1 and bleed off to 12:1, running 19.5 degrees of timing, engine temps was 165, inlet temps started at 84 and stopped at 104, and the MAP sensor read 32.77 psia which is about 18.27psi of boost. I was running on BP 93-octane and had my intercooler tank packed with ice. It was consistantly about 750whp. To me that sound low for my setup. Now, we were having problems with the ignition induction clamp picking up a good signal for engine RPMs. I have NGK -8 race plugs gapped at .032", Taylor 10.4mm wires and factory replacement coil pack that are less than a year old. Could my ignition system not keep up with the boost? Could there be other things causing this low output? BTW, the rev limiter is set at 6900rpm and the blower is maxed out.
07-26-2008, 01:38 PM
#4
Thats a little tough for me. 18 psi F-1R 402 should make 150 hp more imho. How is the fuel set up? leaning out up top may hurt the numbers. No sure about that texas giant bein boost friendy but Im fo sho not a cam guru. Try puttin more fuel to it and see. What is the compression ratio?
07-26-2008, 01:51 PM
#5
Honeslty for a giant cam, it will be hard to see the extra boost, but still could be managed with a different pulley combo most likely. Your power level for everything seems to be about right to me. Large cubes like you have consistantly don't make the power/boost the smaller cubed engines make. They make killer N/A power, and good spray power, but boosted you would've been better off going with a forged 383 IMO.
If you're looking for a little more, I would reccomend going with a meth injection setup. Your IAT's are a little high, and running the meth injection would allow to safely run more boost and possibly more timing, all while keeping your IAT's a little lower, and still running off of pump gas (93 octane).
If you're looking for a little more, I would reccomend going with a meth injection setup. Your IAT's are a little high, and running the meth injection would allow to safely run more boost and possibly more timing, all while keeping your IAT's a little lower, and still running off of pump gas (93 octane).
07-26-2008, 02:11 PM
#6
Thats a little tough for me. 18 psi F-1R 402 should make 150 hp more imho. How is the fuel set up? leaning out up top may hurt the numbers. No sure about that texas giant bein boost friendy but Im fo sho not a cam guru. Try puttin more fuel to it and see. What is the compression ratio?
07-26-2008, 02:18 PM
#7
Honeslty for a giant cam, it will be hard to see the extra boost, but still could be managed with a different pulley combo most likely. Your power level for everything seems to be about right to me. Large cubes like you have consistantly don't make the power/boost the smaller cubed engines make. They make killer N/A power, and good spray power, but boosted you would've been better off going with a forged 383 IMO.
If you're looking for a little more, I would reccomend going with a meth injection setup. Your IAT's are a little high, and running the meth injection would allow to safely run more boost and possibly more timing, all while keeping your IAT's a little lower, and still running off of pump gas (93 octane).
If you're looking for a little more, I would reccomend going with a meth injection setup. Your IAT's are a little high, and running the meth injection would allow to safely run more boost and possibly more timing, all while keeping your IAT's a little lower, and still running off of pump gas (93 octane).
Jesus Christ, you have no idea what you're talking about. Seriously.
First off, you think his power level is "about right"? He's shy an easy 150 HP if not more. Second, you think his motor is too big? Are you retarded? Third, you think meth would allow him to run "more boost" when he's already maxed out the blower? How do you propose he makes more boost? And his IAT's maxed at 104. Thats far from high.
Stop giving people advice when you clearly have no concept of how this **** works.
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07-26-2008, 02:19 PM
#8
Honeslty for a giant cam, it will be hard to see the extra boost, but still could be managed with a different pulley combo most likely. Your power level for everything seems to be about right to me. Large cubes like you have consistantly don't make the power/boost the smaller cubed engines make. They make killer N/A power, and good spray power, but boosted you would've been better off going with a forged 383 IMO.
If you're looking for a little more, I would reccomend going with a meth injection setup. Your IAT's are a little high, and running the meth injection would allow to safely run more boost and possibly more timing, all while keeping your IAT's a little lower, and still running off of pump gas (93 octane).
If you're looking for a little more, I would reccomend going with a meth injection setup. Your IAT's are a little high, and running the meth injection would allow to safely run more boost and possibly more timing, all while keeping your IAT's a little lower, and still running off of pump gas (93 octane).
07-26-2008, 02:24 PM
#9
OK, I got my 402/F-1R combo (spec in sig) dynoed yesterday and was alittle disappointed with the results. According the the DynoJet, temp was 84F, humidity was 36%, barometer was 29.4, SAE correction was 1.02. One the hit of the throttle, my AFR started at 11:1 and bleed off to 12:1, running 19.5 degrees of timing, engine temps was 165, inlet temps started at 84 and stopped at 104, and the MAP sensor read 32.77 psia which is about 18.27psi of boost. I was running on BP 93-octane and had my intercooler tank packed with ice. It was consistantly about 750whp. To me that sound low for my setup. Now, we were having problems with the ignition induction clamp picking up a good signal for engine RPMs. I have NGK -8 race plugs gapped at .032", Taylor 10.4mm wires and factory replacement coil pack that are less than a year old. Could my ignition system not keep up with the boost? Could there be other things causing this low output? BTW, the rev limiter is set at 6900rpm and the blower is maxed out.
I agree you are way low on power. Were you getting any knock? Did you read the plugs? The cam looks a little big but doesn't seem to be bleeding too much boost off. Your fuel system could be marginal, but its not hurting your dyno numbers. I'd be leary of what it does on the track after you start making more power.
What tranny? Locked or unlocked?
07-26-2008, 02:29 PM
#10
Almost forgot, I did this thru a T-56, RAM 910 disk and 402 PP, Moser 12-bolt with 3.73 Gears on M/T ET Street 28x11.5-15. And I haven't hooked yet at the track leaving really soft off the line. As soon as it hits boost, 1st and 2nd can't hang on.
07-26-2008, 02:54 PM
#12
No knock was recorded. The plugs have been looking good. They have shown alittle black, but around the center and ground strap shows normal combustion. The heads are Dart 225cc ported by TEA to 240cc with 2.08" I / 1.60" E valves.
Almost forgot, I did this thru a T-56, RAM 910 disk and 402 PP, Moser 12-bolt with 3.73 Gears on M/T ET Street 28x11.5-15. And I haven't hooked yet at the track leaving really soft off the line. As soon as it hits boost, 1st and 2nd can't hang on.
Almost forgot, I did this thru a T-56, RAM 910 disk and 402 PP, Moser 12-bolt with 3.73 Gears on M/T ET Street 28x11.5-15. And I haven't hooked yet at the track leaving really soft off the line. As soon as it hits boost, 1st and 2nd can't hang on.
Wow, you should be making 900-1000 RWHP. Well, I'm no pro by any stretch, so hopefully someone with more experience will chime in.
07-26-2008, 03:10 PM
#14
I was thinking it might have something to do with my intermittent ignition signal on the dyno. Maybe there isn't enough spark energy to light the mix. I am hoping to get some others with similar builds and see what they have as far as ignition systems.
07-26-2008, 04:21 PM
#15
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19degs is a bit for a f1r on pump gas, but you are barely over 100 on the IAT's , this will change at the track alot. With 18psi and close to 20deg timing, something aint right. Your making the boost for sure. What pulley is on there? Post a log possibly?
I sincerly doubt the cam would make the engine loose 100-150rwhp. This is even on a dynojet to boot!
I sincerly doubt the cam would make the engine loose 100-150rwhp. This is even on a dynojet to boot!
07-26-2008, 04:22 PM
#16
It very well could be. Looking at the power curve, it has a good incline then levels off flat. But then I have ran most of this on my Engine Analyzer Pro Software, it shows that the valvetrain is good.
Last edited by Gold Phoenix; 07-26-2008 at 04:41 PM.
07-26-2008, 04:23 PM
#17
19degs is a bit for a f1r on pump gas, but you are barely over 100 on the IAT's , this will change at the track alot. With 18psi and close to 20deg timing, something aint right. Your making the boost for sure. What pulley is on there? Post a log possibly?
I sincerly doubt the cam would make the engine loose 100-150rwhp. This is even on a dynojet to boot!
I sincerly doubt the cam would make the engine loose 100-150rwhp. This is even on a dynojet to boot!
That car should have more then enough fuel! Im puzzeld
07-26-2008, 04:59 PM
#19
You and me both. On the dyno, it puked some black smoke, so I tried leaning it out, but the power dropped. So I put the fuel back in it and the numbers came back up. The only thing I can think of is the spark getting blown out with the higher boost and with stock coils.
07-26-2008, 05:40 PM
#20
Jesus Christ, you have no idea what you're talking about. Seriously.
First off, you think his power level is "about right"? He's shy an easy 150 HP if not more. Second, you think his motor is too big? Are you retarded? Third, you think meth would allow him to run "more boost" when he's already maxed out the blower? How do you propose he makes more boost? And his IAT's maxed at 104. Thats far from high.
Stop giving people advice when you clearly have no concept of how this **** works.
First off, you think his power level is "about right"? He's shy an easy 150 HP if not more. Second, you think his motor is too big? Are you retarded? Third, you think meth would allow him to run "more boost" when he's already maxed out the blower? How do you propose he makes more boost? And his IAT's maxed at 104. Thats far from high.
Stop giving people advice when you clearly have no concept of how this **** works.
I retract my original statement that they were "high". But they are not ideal, especially if you had to use ice to achieve 104 IAT's. F1R's and lots of cubes is bound to make power. All I was saying was that you usually will see more boost, and as a consequence more power with a smaller cubed engine such as a 383.