MrWigggles

The value at that line is "51.8" which would be MPH and mean they are indeed testing in 3rd gear as I mentioned before.

That means this mod doesn't kick in until about 6800 RPM. That's doesn't get me that excited.

I do think some of this is possible. If you guys remember Mazda had an off-road only racer that they claimed had 300HP.

It was a red car that even had the front windows tinted that was being displayed at various Australian dealerships last year.

It was normally aspirated and had a claimed 300HP from factory. Of course nobody drove it to varify, but at least Mazda thinks it is possible with 1.3 Litre Renesis.

-Mr. Wigggles

ranger4277

Someone says thank you.

r0tor

iTrader: (1)

I also agree... my dyno showed 150hp at 6l rpms like Ito's does... the kick comes in right around the time the tertiary ports are opening.

I'm going with a tertiary port job or a really ballsy ecu map

rotarygod

If that bump in power is around 6800 rpm's or so, that would mean that peak power was obtained around 7500 rpm or so. That is 1000 rpm lower than where it should be from the factory. Power drops off quickly above this point. It could be a mod done to the auxillary ports or manifold runners like shortening them but I still doubt it. This doesn't seem like the best way to go about it. A spike like that is more of a dyno queen rather than a performance queen. It is the average area under the curve that counts and this is only a gain in a very small area. With a close ratio transmission I could see it working.

I still say nitrous with a window switch that doesn't let nitrous flow until after 6000 rpm somewhere but then the throttle was backed off before the dyno run was over. Why not a run to 9000 rpm?

roket rider

ecu mod, he said, "to be a happy 8 owner and realize that your car has a lot of potential"
potential, meaning power that has been held back. the original prototype was said to have 280 hp, then they tuned the engine down before letting the market at em'. if that is true, then all renisis engines have more than we all know, maybe the doc was finding some things out

nite crawler

It was stated before, and it will be stated again, I am sure.

Better ETs will come from more power ACROSS the entire curve. So, I think, if Ito were doing ECU upgrading/tuning, then he would go for more power for a longer period of time. So ECU is out in my books. The ports thing makes most sense NOW after reading breakdowns of that dyno chart. Pushing nitrous at the end like that (again this is my outlook) is plain silly. Would it cause nominal damage to spray at, let's say, 2500, and gradually increase amount all the way to 9000. What did Charles do? Where is the picture of his dyno? When does he bring it on?

Come people, lets get on with process of elimination.

Nate

zoom44

thats what im talking about! ok so we elimated so far-

rev limit increase- because really after the dyno plot has been broken down it just doesn't show it.

a/f map change- doesnt make sense with the dyno since we dont see power increase across the board. however there might have been some tweak to help with the big jump @6800.

zoom44

rg i may have misunderstood you before but i think you said to me that the throttle body was a restriction. also i read something here or on rxtuner about someone who would bore out the throtle body. since we need to get more air in there for this big jump how about the idea of "porting" the throtle body?

rotarygod

Porting the throttlebody itself isn't going to do anything. A larger throttlebody might help but even then the maf will be a restiction. A larger throttlebody that flows more than the intake runners is useless since we don't need that much flow. A larger throttle body is typically something that a lot of people are fooled into thinking helps them. On some cars it does help but on others it doesn't. It always drives different though because more air is entering the engine at a lower amount of throttle. The engine responds faster for obvious reasons but may not necessarily have any more total power.

Just because the power rises sharply at 6800 or so does not mean that if he has nitrous he isn't using it elsewhere in the powerband. Dyno's are pretty hard on cars so if this is in fact what he did, maybe it was setup to kick on up high since he only wanted to see the overall peak potential. Maybe not but it is an explanation.

Shortening the auxillary port runners would raise the power output but also shift the powerband upwards. This appears to be a peak at a lower rpm than the stock hp peak so this isn't the case. Only porting the auxillary ports makes no sense without doing the rest of the engine. The aux ports can be opened a little earlier though but the rest of the ports can not. About the only thing that can be ported is the opening/closing of the aux. ports and the opening of the exhaust ports. Any other modifications to the runners would be worthless. The only way the intake runners would make more power is if they were completely redesigned and shortened. This again would move the powerband up not down. Lengthening the runners would bring the powerband down in rpm range but have less peak power. Again not what happened.

zoom44

so where we are so far is none of the various ideas presented here have a strong case as being the reason for this large spike. just porting the tertiary ports seems like it wouldnt be enough with out more air going in. nor does it make sense to just work those with out doing the others.

but-if he hasnt added anything to the car he must have subtracted something. he says you can look under the hood and not see any change. increasing the size of the tertiary intake and exhaust ports seems to be one of the hidden things that could be done. but how do you get the extra air need in there?

zoom44

a shot of nitrous could explain it IF it was just an exercise to see what the engine could take but how would you do that and not have it seen under the hood. that could also explain the secrecy bit- doesn't wat the track to know he was running nitrous.

ranger4277

Maybe on that particular run he just eased into it until the end where he floored it. I'm not seeing why he'd have more trouble hooking up with this curve unless he was dumping the clutch above 6K. He is also being careful not to break anything this time.. dropping it over 6K with that power isn't what I'd call being careful.

zoom44

leading throttle and then wot from @6500 and up? hmmmm

r0tor

iTrader: (1)

i don't think you can just eliminate the ecu map from that thinking...

a) the original CZ maps kicked in around 6800 rpm
b) on a drag strip after you get out of 1st gear you never get below 6800 rpms (which is the majority of the run) and on road courses you would generally try to stay above that 6800 rpm mark if possible

IMO -> no cat, 100+ octane gas, and a setup thats right on the edge of destruction could give this kind of result

Charles R. Hill

iTrader: (7)

To answer the question about how my nitrous is set to run; It is activated at WOT. I have done some "lug" tests to check for detonation with the 55 h.p. jets and all is cool with 92 octane, the "L" flash, and factory plugs. I have used the spray from as low as 2,500 rpm through to 9K. All is still well. The engine responds fairly well beginning at 4K but really pulls at 6K on up. As far as what J.I. is doing, I have no clue. In addition, I am not going to spend the money on dyno runs when I can use that money to go quicker and faster. I would like to get to the track and see how accurate the G-Tech is.

Charles

ProtoConVert

I am and have been very interested in the rev limiter increase.

Aside from controlling apex seal pressures and doing something about the alternater, what else prevents this mod from being done?

wakeech

it couldn't be porting, what's to port?? not to mention, porting doesnt' affect a torque curve like that (try to extrapolate it in your head... it's not too hard to see). definitely nitrous, 'cause we aint' got no VTEC

controlling apex seal pressures??? short answer, don't worry about it.

yeah, the alternator would definitely have to be addressed, either underdriven (meaning that it would be useless just toodling around town) or have a freewheeling system like the A/C does... it might even have that stock, 'cause 9k rpm is a long way to go.

rotarygod

He admitted there is no nitrous. He also said he'll eventually tell us what he did. It's cool. I can wait.

guy321

It's OBVIOUS isnt it??

Every possibility has been ruled out..

It MUST be the TORNADO!

canaryrx8

iTrader: (3)

if it was the tornado then it wouldn't be "stock"?

mysql101

I buy all my performance parts from QVC.

guy321

He said it looks stock :p the tornado goes inside the air tube so you'd never see it!

zoom44

that thing they sell on tv? i think guy is on to something

shelleys_man_06

Well. The thread is gone, so I guess we won't be able to find out what Judge Ito did to his car. Maybe going to NoPistons wil reveal something.

DARKMAZ8

I think there is a post on nopistons with judge ito stating that his "daughter" did a mild street port and a 50 shot and came up with similar numbers.

I think that nitrous is involved no matter what!