1990 q45 return to the dyno part 2.

[subtle_driver]

So i went to the dynomite tuning a few months ago less prepaired.

Since then i installed a Jim wolf tech. pop charger with aluminum velocity stack maf adaptor, (based on how much Power was lost through the stock air box) and e-mance re-tuned the ecu on the spot. It pulls noticeably harder at higher speeds. You can watch the needle flowing at a constant pace from 90 to 135 and above. I gained 24 hp and 31ft lbs of tq since last time. I'm planning on keeping this car, and I want to install electric fans and install a 5-speed gearbox to increase the amount of hp to the ground. The automatic is just killing the power to the ground.I'm also planning on installing more agressive cams (who makes those?) and lighter valve train so it can rev to 8.5-9k, and I already ordered a timing chain set with metal backed guides. I'm also going to delete the cats, find some better flowing headers and fab up a 2.5" header-back exhaust system.

[maxnix]

Hood closed with summer heat and real air resistance will determine if there are indeed any gains. Save your OEM intake!

We definitely know there are no longevity gains.

[subtle_driver]

Hood closed with summer heat and real air resistance will determine if there are indeed any gains. Save your OEM intake!

We definitely know there are no longevity gains.

Resistance or not, there is a gain. But if you want, I can install the stock tune and install the stock air box and see if i gain more power with the simulated air resistance mode on the dyno? But that is a waste of time, as you can clearly see, stock versus tuned with JWT pop charger. Another car i was part of makes over 850hp to the crank with a ka24de turbo. it uses a JWT filter, if it used a stock filter it would get ripped apart and sucked into the turbo.

We definitly know that its not about longevity, its about power! I have several other cars with modifications simular or more extensive to this. example, my 240sx has been turboed at one bar with a stock block for 70k miles with this filter. it has 200k on it now with 175 compression and not burning oil. i dont expect it to out last a stock engine, but it sure is lasting a long time despite all that.

thanks for your comments tho! If im bored and have too much money, i'll go back to the dyno in the summer and see what it does. I'll save the stock air box and see what happens. I'm curious.


Modified by subtle_driver at 4:16 PM 2/14/2010

[goody90q45]

As a fellow Californian you need to save the stock air box anyway to pass smog every 2 years. I've got mine on the shelf while the Stillen cone filter is installed. I'd be curious to see the results of your hot weather dyno when summer comes around.

[MinisterofDOOM]

But that is a waste of time, as you can clearly see, stock versus tuned with JWT pop charger.

What Maxnix is getting at is that dyno conditions don't accurately replicate on-road conditions at operating temp. Air might be warmer out on the road (might even be cooler based on airflow) and gains on a dyno from an intake mod aren't definitive. The best way to ensure intake mod benefits in the real world is to isolate airflow from underhood temps as much as possible.

Also, just for discussion's sake, my car uses the stock airbox and makes tire-killing amounts of power. Exhaust and tune are not stock but the intake is. I take that as a sign that the airbox isn't a critical weakness.

[Rex]

A good "tune" alone can get you close to those gains. It would be interesting to see what your tune looks like compared to the "NICO" maps.

[Q45tech]

Generally all the dyno tunes: Dinan, Stillen - JWT, & NICO are clones of each other as far as the bulk [90%] of the gains.

A +- a degree here and there, or +- 0.75:1 AF don't amount to much.The reAL CRITICAL COMPONENT is making sure the tune doesn't knock in acceleration.

Whether E10 is better protective is unknown and depends on the underlying gasoline quality and running air temperature.

Where tuners make MISTAKES is to not back off to compensate for the slower real world acceleration vs a dyno run due to lack of aerodynamic drag on dyno.

Take a moment to consider what a Q does on the road in 3rd gear 90> 140 mph.............The real world takes 28 seconds yet the dyno is less than 10 seconds.

Tuning for peak power vs a simple quarter mile run <15.0 seconds is a very differnt tune.

[subtle_driver]

As a fellow Californian you need to save the stock air box anyway to pass smog every 2 years. I've got mine on the shelf while the Stillen cone filter is installed. I'd be curious to see the results of your hot weather dyno when summer comes around.

my jim wolf pop charger is carb legal for california. My q45 is exempt from smog anyways.

[subtle_driver]

What Maxnix is getting at is that dyno conditions don't accurately replicate on-road conditions at operating temp. Air might be warmer out on the road (might even be cooler based on airflow) and gains on a dyno from an intake mod aren't definitive. The best way to ensure intake mod benefits in the real world is to isolate airflow from underhood temps as much as possible.

Also, just for discussion's sake, my car uses the stock airbox and makes tire-killing amounts of power. Exhaust and tune are not stock but the intake is. I take that as a sign that the airbox isn't a critical weakness.

The stock airbox is not a critical weakness, but switching it out sure made a difference the last time i was at the dyno. it was 9-10 hp difference.

I'm trying to locate a set of cams, does anyone here know who makes them?

[Infinitiguy19]

As a former Cone Filter AKA "Cold Air Intake" lover I must agree that you really are sacrificing A LOT of engine life for "More Power". You are killing your engines internals for some more sounds and very little real world power.

[Q45tech]

Since the bulk of most driving is idle and low rpm cruise.......when more doesn't count.

Maybe someone can develop a combo cone with a WOT flap that only operates when you are seriously accelerating.

Like the post 2002 Q/M variable rear muffler system.

[Kiven422]

keep in mind you will hit 102-104MPH in 2nd gear at redline 7000RPM. Theres slightly better acceleration top end and you get a quicker shift to 3rd gear.

[Rex]

... I'm trying to locate a set of cams, does anyone here know who makes them?

You'll have better luck asking that questions over here.

[subtle_driver]

Thank you Rex!!! I didn't even know this forum existed! I just went from q45.org and it led me here. I think these guys will have more useful information for some of the things I'm doing.

[666-g50]

i actually have a filter and fan system similar to the one shown only mine is wired to a switch that sits under the throttle and is only depressed under full movement of the throttle arm, so in theory it will only produce under full acceleration when it is needed most. i have not hooked up the switch as of yet.