I ran my car at Scotts performance in Santa Clara and posted 283... without cams and without headers... I do have a UNICHIP and Ted (the owner of Scotts performcance) did spend some time tunning the car!

 

Jack Businger is a guy we track with in Chicago. He has every mod plus Unitech header back exhaust, cjm fuel system and now he is getting the UTEC and tune. So I believe he will be the first dynojet over 300hp. I believe mjedens dyno was not accurate. Relatively good source told me that.

 

Maybe me on a dynojet. Need to go see.

 

Is there something wrong with this thead? I posted twice and neither showed up??? Oh well, here goes again.

There's a guy we track with who has every mod including the Unitech header back exhaust for like $4000 plus CJM fuel system with bumped up pressure etc and he dynojetted 292.

I heard that mjedens car's dyno was not accurate, so too my understanding no one but the race teams have breached the 300whp barrier.

"I don’t know if Mike (mjedens) would want me to say this but I don’t think he cares . . .He and Doug dynoed on the same day at the same dyno a couple weeks back (a shoot out if you will) and Doug's numbers were better!"

https://my350z.com/forum/showthread....t=mjedens+dyno

 

Great #'s guys.

 

Wow, what a disaster sorry guys.

 

The way I see it is this. Look at the NISMO RS CONCEPT Car. Nismo threw everything from the kitchen sink at their disposal incuding the following to pump up their N/A VQ. Here is the translation...

A. Cylinder Head
1. RS Concept Special High Compression Cylinder Heads Spec. 4
2. RS Concept Special Camshafts
3. High Angle VTC Pulleys
4. Strengthen Head Gaskets
5. Titanium valve System
6. Strengthen Valve Springs

B. Cylinder Block
1. RS Concept Special Pistons
2. RS Concept Special Conrods
3. Strengthen Conrod Bolts
4. High Strength Crankshaft
5. Strengthen Oil Pump
6. RS Oil Pan Fluid Plate (Not too sure if that's correct)

C. Exhaust
1. RS Concept Special Exhaust Manifold

Even with all this, Nismo is only claiming 345bhp or 290whp, now why would they lie?? Now we may replicate some of their mods with specific after and better after market mods, big CAMS, headers, motec, utec. Trying to squeeze 70whp from tuning the motor is a tough nut to crack because there's only so many ways to get air into the engine.

 

It's starting to look like anyone trying to push over 300rwhp ***CONSISTANTLY*** is going to have to bore and/or stroke the motor..

100mm bore would bump up displacement to 3.8 and yield about 25hp which could probably equate to a 20-22rwhp gain.

Stroking by offset grinding the rod journals by 2.5mm would yield an increased stroke of +5mm bumping displacement up to 3.7. You're looking at roughly a 16.5hp gain or 13-14rwhp..

Throw in high comp pistons and you're looking at another 3-4% gain.

The underlying problem, obviously; is it cost effective to go through all this to merely push 320-330rwhp when there's so many FI options available??

 

Cosworth is coming out with a set of heads for the VQ motor. It should be interesting what they come up with. It will be expensive, but good.

 

I'll be going in soon for another dyno run. My last dyno run was 260whp and 243 ft-lbs tq with Crawford plenum, JWT pop-charger, Stillen exhaust and grounding kit. This was on a dyno where a similar car with Injen intake, Kinetix plenum, high flow cats and Borla exhaust posted only 240whp.

I have since added Nismo cams, cat test pipes, Stillen headers, UR crank pulley, lightweight flywheel and TS ECU re-flash.

I'll post new results when I have them.

 

Isn't the Esprit setup with Cams and Pistons right around the 300 rwhp mark? I thought I saw a dyno of a Z with that setup.

 

So Is it cheaper to build up a 300ish NA motor or FI motor?

 

I have mjedens 301 hp dyno sheet around somewhere. It was posted a long long time ago but has since been removed. It should be noted he pulled the 301 with headwork and 20 over pistons and the tomei cams. Anyone in the 285-295 range withouth the bigger pistons are probably where he would have been without the internals.

We just put down a solid 290 on with dougs car 2 weeks ago. Time for bigger exhaust cams!

 

Yeah, but this was on a Dynopack which reads higher then a Dynojet. Go to a dynojet and see what it does.

The pure and simple fact is without internals, or some HUGE cams, or maybe alittle of both you are not going to hit an accurate 300rwhp. Yeah, you can find some dyno that will tell you more, but it won't be the actual output of the engine. This is refereing to the 287hp motor and the 300hp motor could be the exact same way. We just have to wait for someone to come out with cams for the 300hp motor to try it out. It sucks, but it is the truth.

 

Here is another one...

 

yes, but he was also running nitrous which I think disqualifies his accomplishment from this discussion.

 

You don't think I know that a dynapack reads a bit higher than a dynojet? That is why I linked the thread, so whoever is on this thread could see the FULL scoop. Yup, but Shawn Church the dynapack owner told me that the car should be hitting high 270's or low 280s on a dynojet no problem. Considering I am on 91 octane, on a mild ECU tune for circuit racing, and internals untouched, that is an accomplishment in itself. With a big cam, head work, and higher compression pistons, I bet money that I can surpass the 300whp mark on a dynojet.

If you are talking about actual output of the engine, wouldn't a dynapack be more accurate for reading actual hp than a dynojet since there are less variables involved?

-Camber
-Toe
-Rims
-Tires
-Tire pressure

The dynapack system is way more accurate imo only being second to an engine dyno itself with the complete motor removed, which is why Turbonetics and JWT use these things to measure results for their R & D.

 

Well im glad that you know that. I am talking about actual power put to the ground. If you want to measure without your wheels and tires then go ahead, but this is not your actual WHEEL hp (I did notice that you still have good gains from stock to present). If you want to see what power numbers are actually moving you then you would want to deal with camber, toe, rims, tires, tire pressure. I do see how you would like a dynopack and it is a good tool to see the actual engine power, but I think some people get this confused with the actual rwhp.

 

Then I guess people better downsize to 15's and put small tires on the rear to create less drag. They can also zero out the camber to get higher numbers than in real life street/race instances. This can all be manipulated dynojet or dynopack, but dynopack is more accurate when comparing one car's ACTUAL engine outpt from another on the same dyno on the same day than a dynojet.

I do see your point though about people confusing the two types of dynos, which is why I specifically mention it in my original post

 

My MODS are:

Nismo Cams
Nismo Headers
Borla TD Exhaust
Crawford Plenum
Kinetix Test Pipes
UR Crank Pulley
JWT POP Charger
Vishnu Piggyback XEDE
& a Grounding Kit

I have been a member of this forum for a long time and I have been through the ringer on trying to get good NA power out of this already highly tuned factory engine. My car with all of its tuning has been dynoed around 110 times. I have experimented with all sorts of A/F ratios ranging from rich 12.0/1 to lean 13.9:1 mixtures. I finally settled on a 13.0:1 ratio from around 5500-6600 rpm. With these mods, this is the A/F that has netted the most power-278 rwhp on a dynojet that I baselined with 233 on. I find it extremely hard to believe that people are getting numbers 20 whp above me without cams. Dynapack dynos obviously will read high due to the fact that you are removing 80-100 pounds of wheel and tire. I am not familiar enough with Dastek dynos to know exactly how high they read, and from my personal experience Dyno Dynamics read very low, but recently I have been noticing them showing very High Numbers that I just can't put any credit to. The most credible 290+ rwhp dyno I have seen is DOUG CRAWFORDS car, I truely believe his car has some good power, but look at the all the mods he has done to it-Also, ANDY@ perfomance is also making credible numbers with he rev-up. I am not saying that people are lying about the numbers their cars put out, I just think the dynos are reading way too high.