From my dyno expierence, 12psi on a FI JWT program for a 4th gen maxima is not all that much power. I only put down 330whp on 12.5 psi with the JWT ECU and 330whp on 8.5psi with the stock ECU. Turn that boost up if your running the JWT ECU, nothing to worry about!

 

Is their SC programs as conservative with timming and A/F as the turbo program?

 

Same program probably.

 

im still tuning it in i only drove it like 20 miles so far...I also have alot of +s over a boosted 3.0, cams/3.2ltr/3.5 heads/titanium valves/ported heads.

 

I wanna see a vid of this monster...

 

of course, I am sure it makes more power than the standard turbo VQ30. My only point was the power that 12psi has been known to make in a maxima is not the same if your running a JWT ECU.

 

I'm guessing you mean that JWT timing is overly conservative for all-out power.

 

Basically, I get about 20hp per 1lb of boost on the stock ECU (stock timing) and 15hp per 1lb of boost on the JWT. It is not a necessarily a bad thing, it just takes more boot to make power. It certainly can be a problem for those trying to run big numbers and become the limiting factor. But in my case all I want is 350-370 whp on a daily basis so the JWT still works OK.

 

I was gonna dyno tune today but its an hour too the dyno and its raining like a ****.

 

Rain = 4th gear wheelspin for you guys? I've had 3rd break loose in the rain.

 

My car aint hitting rain but it would probably spin 5th its seems like a very torquey setup.

 

my old car spun in 3rd... when that huge turbo kicked in like 4100 rpms Wooop... Tilley remembers. im sure its not as fast but it did damage!

 

Not trying to toss a you-know-what in the punchbowl, but I got 365 whp at 12.2 psi with the FI JWT program, and that was supercharged, too (meaning I probably had about 20-30 hp loss from driving the blower, on top of the normal drivetrain loss). So maybe 390 whp if I was using excess enthalpy left over after combustion to drive the blower.

 

What about non-SAE corrected?

 

I know you don't "cheat" Stephen...just making sure Mike doesn't use SAE CF especially at altitude.

 

Nevermind, I found his thread...http://forums.maxima.org/showpost.ph...5&postcount=51

 

I know this and it has confused me as to why SC guys with the JWT program don't seem to be down much, if at all, on power. Maybe they are not the same program but I gotta think they are.

But myself and Mardi can both attest to the conservative tune with the JWT ECU and how it effects power. I have not really talked with Tilley about it, but it was obvious from his trap speed and his boost level that he was not making as much power as one would think.

Here is another example. I traped 111mph on the stock ECU and 9ish psi. Put the JWT ECU in the same night at the track with no other changes and couldn't trap over 105mph. That is a big power difference.

With that said, I am still gonna most likely run the JWT ECU as my final set up. After much deliberating I am just gonna turn up the boost and run 13-14psi on the JWT ECU and call it a day. It's safe and the AFR's are good.

 

There is a very slight difference between no correction and SAE, on the order of less than 10whp IIRC

 

I like the setup however, I don't see very much cooling going on with that big *** I/C in the way along with a very warm radiator behind it. Are you running some sort of modified hood to help eliviate some of that heat ? I was thinking of going with this setup for my own hood.



Along with the spacer mod for the hood mounts should be plenty without over doing it. I did the same mod to my buddies Z and we lost 15 degrees in the spacer mod alone.

 

All gears spin if it's wet for me.

 

Spinning an overdrive gear in the rain has to be scary.

BTW, does anyone know the difference between stock timing and JWT timing? It can't be all that much.

 

It's not really scary there's no reason for me to floor it in the rain so I don't, also it's no different than flooring your car on an icy road and spinning them in 5th, you're in canada so I assume you've done this just like I used to do. Nothing happens other than you make a ton of noise.

Do not make the mistake of underestimating JWT's retardation (pun not intended). Mardi's JWT ECU ran a flat 10 degrees of advance at WOT... stock is as much as 24 degrees of advance (it depends where you are in the powerband though, it can be lower). VeeQue's JWT N/A program hit 34 degrees of advance, eng92's custom TS program hit 33 degrees of advance. It's retarded too much at least in some cases (Mike losing 6mph consistently and needing 4lbs of boost to make up for the timing).

 

woow that intercooler is massive! great job Tilley. i wonder what the numbers on that is going to be. can you say slicks....

 

My radiator doesnt even get hot....165degrees mostly on occasion it hits 175 when i beat it. You gotta remember its a 2.5 inch core griffin. I have one porblem to diagnose yet i have a hesitation above 5.5-6k I think i need to regap the plugs...

 

What are they gapped to right now and what type are they?

 

I haven't driven the car in the winter yet. Remember when I told you I had blown an axle and my differencial? Well, it's staying parked in the snow till March. No road salt at least.

Have you ever heard of more than 34 degrees advance on a VQ35?

Isn't 10 degrees bad-knock-sensor territory?

Perhaps Mike should try a 1/4 mile pass with his KS disconnected. Maybe he'd trap around the same as he did with JWT ecu.

 

Stock gap one step colder NGK coppers

 

Tilley, I don't mean to hijack this thread or anything, but I need to speak with you, is there any place left in your PM box? I know it was full for a while.

 

only 88 messages now so hurry it may be full soon....


BTW i regapped my plugs too a .032 gonna take her for a spin this afternoon.

 

Lol, PM sent.

 

Tilley took me out for spin last nite. OMG....at times, I felt like i was fearing for my life He can just spin the tires easily in 3rd or 4th gear w/ 19's on. That car is crazy. Faster then his gf's car. I can't wait to see it on the track and after it gets on the dyno and some tuning.

 

Yeah, when he took me for a ride before it was a 3.2, but still turbo, I pretty much was grabbing the 'oh ****' handles and also fearing for my life. Very scary from the passenger seat.

Tilley- I would think you should get 2 step colder plugs and gap them closer at like .036....or is it .36.....

 

That is all I was worried about of course now that I know you're running a bigger radiator that takes care of a whole lot. But you still have un answered heating questions. Like those new turbo manifolds of yours,do you plan on wrapping or coating them to help shave some heat ? Some kinda of hood mod to help shave heat even more. I don't know if you're looking for the sleeper or stock hood but I'd be trimming heat every place I could. Exspecially since our engine bays are tight as it is we can use all the heat trimming help we can get. Hell, I'm using every cheap/free power trick in the book and my motor runs nearly cold. KEEP THAT INTAKE CHARGE COLD !!!!

 

interesting set-up man

 

Motor is back out for some bearings. I used the old rods bearings when i reassembled it cause they look fine and were out of a good motor, but one of them spun so i have another crank here waiting to go in as soon as bearings get here.

 

Hey Tilley, i sent you an email to your work email. I tried to send you a PM but your box is full. Srry for the thread jack.