Wondering what some of you guys with built longblocks (heads/cams) were seeing number wise with a MP. also what kind of boost you are running those numbers at and pulley combos. i'd like to know street and race tunes if you have both. thanx

 

(not part of the club)

But since you have to spin the MP likes to be spun FAST, I'd strongly suggest porting heads and larger valves to help move the air through the engine. Full exhaust also.

 

monkeysL, I have got a built lower with ported heads and crower stage 2 cams. I currently have 2 tunes, 1 for the street/strip and a nitrous tune. I am going to get tunes from JL and Sal soon. This because I feel my numbers are low. I run a 8# lower and the 2.7 upper that is on the MP blower. I have a modified metco belt tensioner. I see around 17 on warm days and 20 on cold days. Here are my dyno sheets, street tune first:
These are overlays of my previous dyno graphs also.

and nitrous;

Hope to see more HP and TQ when I get retuned with either JL or Sal at PSP.

Rich

 

The biggest mistake I made WAS NOT doing Cams and at least Port my stock Heads. I have a PSP built Motor, we re-used my stock Heads and Cams since we built my motor specifically for Nitrous.

22lbs at WOT with a 8lb Lower, 2.7 Upper, + Mag Idler Bracket.
Unfortunately it is well short of monkeysL shown above using Heads and Cams.

I was 451/566 SAE
and 475/596 uncorrected
Hoping to get on the Dyno in the next day or 3 for the n20#'s
I'm starting off with 150 HP of N20.

 

I don't know bud, but 588rwhp and 734rwtq seems good to me, seems like twin screw numbers to me, I'd be perfectly happy with those numbers.

 

Those are nitrous numbers and only 12 degrees of timing. This was also on 93 pump gas. I think max timing on the street tune was 17 degrees. I just think there is more in her.
Rich

 

sorry, didn't know you were spraying also...good numbers none the less, but your right theres probably more to be had with the off the spray numbers.

 

Also White01, your dyno sheet is in SAE corrected numbers. Not the STD 0 smoothing #'s that JDM uses. The STD/0 numbers will be considerable higher, and in my opinion less accurate.

 

You definitely need to get a set of heads on that engine. There's no point in going as far as you have without letting the engine breathe better. Inhale and exhale. Cams can wait; but, heads that can move the extra air, and heat, out of the engine, are key to the life of even a built motor. With stage II cams would be even better. You know Uncle Mastercard loves you.

 

I think you did fine Rob.
The extra boost and spray should be fine for a while. At least until you can refinance your house again

I sure wouldn't loose any sleep over it until I got some track time on it.

Hope I am not thread jacking by saying won't it feel good to beat Gator with stock heads and Cams...........

Sorry, I couldn't resist

It has been a cold cloudy day in Denver and I am bored to death.

 

i have a 8lb lower and a 2.7 upper, heads and cams. full exhaust.

the whole enchalida.

with this pulley combo at close to sea level 17.5lbs TOPS!!!!!

i got to get a 10lb lower

 

We (FS) have been tuning the Magnum Powers 01 lightning at our facility, and the numbers we are getting with the same combination are very similar. We are however using an MD1750 SE load bearing Dyno. Based on conversations I have had with JDM the numbers we are seeing, are right about where they should be.
I will post the Dyno sheets when I get them scanned, but if memory serves 518.8 HP by 585 ft/lbs peak. The thing we look at is the area "under the curve", not so much at peak.

Ron

 

Ron-

Are the 518/585 numbers loaded or unloaded?

SAE or STD?

M

 

The numbers are SAE. Because we use SCT to tune, and SCT highly recommends that you tune using a load bearing Dyno, the vehicle information is loaded into the Dyno, and it sets the load. I should also say that in terms of the numbers, loaded vs. non loaded do not vary that greatly.
I picked up copies of 2 very similar trucks that we did. The MP truck was 518/560 and one we did out of Seattle left here at 511.2/578.4.

Ron

 

Ron-

What does the area 'under the curve' represent and why is it important?