Just put down those numbers today in the car. It was just a baseline dyno to make sure the car was safe to drive and boost so the A/F is below 10:1 in some areas b/c it's still not running an fuel controller.

PS...remember the car is still an automatic w/ stock cat and resonator before anyone comments on the low hp numbers.

BTW, this is Mishap on Shadow's account while he's down in Florida hanging out w/ Sadler. I'm just dropping the car off at his house so I'll post the dyno plot when I get home.

 

Why is that low?

 

It's low because once it gets tuned those numbers will be higher.

Is Jeff going to convert to 5-spd?

 

It's not exactly a small turbo... That and Sadler put down almost as much hp on a T3/T04E. A/F is pretty messy w/o an AFC so there's another 10-20hp that can be found.

Downloading the files right now.

 

I think he'll swap once he's seen how far the auto lasts him:

Here's the plot: (I put Sadlers's on for comparison)

The automatic shifting causes that weird overlap around 3200. It also meant we couldn't get the car to spool w/o downshifting there so we don't have a direct low end torque comparison. Had to ease in on the throttle there or else the car would kick down.

Quite honestly, I'm pretty satisfied w/ the results especially since we couldn't do much w/ the fuel. The car is pushing some of the heaviest wheels ever loaded onto a Maxima along w/ auto tranny w/ over 100k on it (20k boosted before).

I stayed around to watch two other cars dyno after me and they didn't quite get the results they wanted. First was a 350Z w/ Stillen Supercharger and exhaust. Put down ~230 stock but it only got 275hp and 255ft-lb @ 6psi. Car didn't have any adjustable fuel system so it's running too rich. Guy wanted to break 300whp.

Next was a Toyomoto built Rotex Supercharged and Intercooled IS300 automatic. Full headers, no cats, TRD exhaust, Haltech standalone, and pushing 11.9psi @ redline. Hit 285whp and ~250ft-lb torque. It made 325hp+ w/ it's original internals but blew all 6 pistons on the Toyomoto dyno. Now it's running 2JZ-GTE internals so compression is a lot lower.

 

Good numbers...


Slap a VI on there and I bet he see's 275 WHP.


I am surprised the TQ is that low. Not that's it low..lol.. juts lower than i was expecting for a US spec manifold.

 

Well, you should expect the US manifold gains in the low end like Sadler's car around 3500. On Shadow's car, we had to ease into the throttle lightly to keep it from downshifting. Sadler's car makes 30-40 more ft-lb torque than Y2Kev's in that range.

It's hard to tell b/c of the lack of data in that range for Shadow's car. It does spool pretty quickly but not quite as low as Sadler's.

Shadow has a polished US manifold coming in for the show season and we'll figure out something for more full range power when we have the spare USDM off the car.

 

I understand about the low end numbers. Just I "thought" the peak would be higher.

And to bring back the apples to apples discussion, nigel made 280 LBS TQ at 5.5 psi.

And I'd rather have the broader TQ & HP curve of kev's car or a VI car. You don't need all the low end TQ form the stock manifold. Causes to much wheel spin, although it's on my car right now..lol

I still like the numbers Better than I did @ 6 psi.

 

Someone told me that some turbos are not benificiary to you boost a certain amount of boost. People have told me that a turbo will not show its true potential untill lets say you start boosting 10 lbs.

The difference in power is not much, you have more powertrain losee because of auto vs Sadlers manual. You are only boosting one more pound, I don't think it is too off.

One questions when does boost hit?

 

Was Nigel manual? If so, that'd explain the ~10ft-lb's difference. And wheelspin won't be much of an issue when he gets his rolling stock upgrade.

Not saying the US manifold is better than the MEVI. It does choke off flow even in NA cars and much worse on FI cars. Just think there's also a better solution than the MEVI. Turbos are all about flowing as much air as possible and variable intakes create more drag than single runner intakes.

The MEVI has two settings to provide both low end torque and high end power in one package. It's a compromise for driveability in N/A applications and w/a pressurized intake it's no longer optimal.

Once again I'm not saying the MEVI is a bad setup. It's a relatively inexpensive way to add a good bit to the top end w/o big losses down low. We're just experimenting a bit so we're not quite ready to drop on the MEVI just yet.

Spanishrice,
If it wasn't for having to gradually get on the throttle, you'd be able to see the power rise just above 3500.

As for seeing bigger gains @ 10psi. It depends on the turbo size, engine efficiency etc. The VQ's high compression and aluminum block probably wouldn't like seeing the 30psi where Supras can hit 900hp. Most of the turbos used on Maximas reach peak efficiency in the 10+psi range but it takes a lot of work to get a car safely there.

 

Last time I checked, Nigel put down 230tq at 5psi with corrected numbers.. Unless he changed turbo's and redynoed with full exhaust and whatnot?

 

Nice Torque numbers. That HP could be much higher with a MEVI

 

Yeah, the manifold is the next issue I'm tackling. I just want to try something other than a MEVI.

I'll have new dyno numbers in a few weeks after the full 3" exhaust is done and the emanage is in and tuned.

 

It may have been. That's the last number I remember seeing.

And Mishap, now that I think about it, your correct . I had to much on the brain the other day..lol.

 

If I were the owner of the IS300 or the 350Z you mentioned I would just go shoot myself now.

 

i was thinking the same thing

 

I hung around an extra 2 hours just to watch them make pulls and I was pretty disappointed though the 350Z made impressive electric drill sounds at WOT.

The SC on the 350Z was $3700 + installation so ~5k since you have to cut a big hole in the hood for 40whp and little ability to make much more than 20 more hp w/ that setup. He can go water cooling and smaller pulleys but he's forever limited by that horrible roots design.

If Toyomoto's turbo has any correlation in price to their SC setup...his stage 2 kit wasn't cheap (Stage 1 turbo is 10,500). Especially considering he has standalone, FMIC, Supra turbo internals, and an upgraded SC over the base kit. The build quality on that kit was amazing though. Perfectly CAD designed and machined SC bracket w/ integrated tensioner pulley made it look like a slightly ovesized alternator.

Having hung around that shop far more than the avg person should, the lowest I've ever seen a Supra pull there is 400-450whp on a single tiny T4 turbo(Compared to what some of the other guys run). Those guys definitely need to go yell at their manufacturers to make some more power.