Throttle response

Post by **blind6** » Sun Dec 18, 2005 12:28 am

I have been searching the past couple nights (12hrs a piece at work) trying to locate some info about improving throttle response. Most of the cars I have worked on have a dizzy and wires. My 97 Q45 has thrown me a new curve and a need to learn more about this system. My 04 Durango had a coil setup and I used a spark advancer (not impressed ). Other than the NGK plugs, what are my options? I am 50-50 on the diff swap, but trying to stay more in the engine bay. So far I have seafoamed the intake and oil, used Lucas in the gas, added valvoline maxlife synthetic oil w/ restore additive, used octane boost w/ 92 fill-up, and just took out the rear muffler and put in two dynomax mufflers. I have noticed gains, but I am after responsiveness at the pedal. Any help would be appreciated, I know the manufacturer made it the way it is but I think some improvements can be made. I'm not trying to make a race car, i just want it to act more like a V8 . Thanks in advance

Post by **nchopp** » Sun Dec 18, 2005 5:50 am

Could you be a little more specific? Where is it you're looking for more performance? Low-end, high-end? I for one am very satisfied with the performance of my Q - keeping in mind it's a 4,000 pound car and will not be "quick" off the line without some significant modifications. (I.e. Wes's BAD Q)

Post by **blind6** » Sun Dec 18, 2005 7:39 am

What exactly has Wes done to his Q? I do realize this car has a sucky weight to HP ratio, but through experience with my Honda's and Acura's I've changed ignition components and noticed a better response when it comes to the throttle(I press the gas and it goes, no hesitation). That's ultimately what I'm trying to reduce is the hesitation between pressing the pedal and the vehicle going. Sorry that's the best that I can explain it, I can work on cars just can't spit out all the lingo.

Post by **blind6** » Sun Dec 18, 2005 7:49 am

zerothread?id=19631

It figures I'd find what I was looking for after I threw my link out there. Has there been any added info to this link since it is a little out dated?

Post by **nchopp** » Sun Dec 18, 2005 10:11 am

Oh, Wes's Q is probably the farthest from stock (mechanically) of just about anyone's around.

* Level 10 transmission with 3000 stall torque converter* MSW wheels- 17x8 in the front, 18x9 in the rear. Sumitomo HTRZIII 245/45/ZR17, Kumho Ectsa 245/40ZR18* Full custom Borla exhaust with gutted cats* 4.08 Rear End conversion* 100 shot Nitrous system, with JWT NOS, race gas fuel cell.* JWT ECU and TCU- Boosts performance and raises redline to almost 7500 RPM* Tokico Blues with Eibach springs* Stillen Front strut brace.* Cross drilled brake rotors* Stainless steel braided brake lines* Synthetic fluids throughout* Best 1/4 mile time: 12.6 at 108mph

Here's the write-up on it.

http://q45.spilky.com/bad/

Post by **elwesso** » Sun Dec 18, 2005 12:43 pm

chopp that stuff is fairly out of date... things have changed. i gotta change that crap sometime......

one thing that the factory did was retard engine timing when the car first started off..... this was so when you floored it, the car would not lurch forward...

remember that any 32valve V8 with a 4 speed auto (with grandma gears) in heavy car will not have very good low end response...

Post by **blind6** » Sun Dec 18, 2005 5:07 pm

Wes,So out of all the above listed mods which would you say are worth keeping/trying?

Post by **elwesso** » Sun Dec 18, 2005 5:12 pm

little of those are actually applicable to the Y33 Q and will make the car go any faster...

For you, id slap in a 4.08 differential and call it a day..... bottom line best mod you can do.

Post by **blind6** » Sun Dec 18, 2005 5:22 pm

So the 4:11 gears, Jim Wolfe ECU, and tranny are out?

Post by **squeefoo** » Sun Dec 18, 2005 5:26 pm

blind6 wrote:Wes,So out of all the above listed mods which would you say are worth keeping/trying?

I'd make sure it is running like brand new first, -if it's that doggy test the det sensors, and hook it up to a scanner.

Not sure what needs to be done to a Y33, but this would be my starting point. FWIW.

Post by **blind6** » Sun Dec 18, 2005 5:38 pm

det sensors? not sure what your talking about. Some of the lingo is new to me. Unless I'm just slow and misunderstood.

Post by **Rex** » Sun Dec 18, 2005 5:39 pm

blind6 wrote:det sensors? not sure what your talking about. Some of the lingo is new to me. Unless I'm just slow and misunderstood.

I think he means Knock Sensors, that was the first thing I thought of when I read it.

Post by **blind6** » Sun Dec 18, 2005 5:42 pm

That's what I was thinking also, but wasn't sure. Someone stated that along with the knock sensors you need to replace the wiring, is that sorrect or false info?

Post by **maxnix** » Sun Dec 18, 2005 7:39 pm

blind6 wrote:That's what I was thinking also, but wasn't sure. Someone stated that along with the knock sensors you need to replace the wiring, is that sorrect or false info?

That's a;ways correct unless you want to repeat the labor when the harness fails soon after replacing the sensors.

Read in the Infiniti Mechanic Forum about KS replacement on a VH41DE.

Post by **elwesso** » Mon Dec 19, 2005 4:40 am

Yeah... DEFINITLEY dont even THINK about modding before everything is kosher... Take it to autozone and have them read the codes!!!

Post by **blind6** » Mon Dec 19, 2005 5:31 am

Can they read codes if there are no CEL's?

Post by **elwesso** » Mon Dec 19, 2005 5:34 am

yep, knock sensors dont throw CELs

Post by **blind6** » Mon Dec 19, 2005 10:22 am

And I'm learning.....We only have Checkers here in Hawaii, is there anything specific they need to test for? Or is it a basic diagnostic

Post by **elwesso** » Mon Dec 19, 2005 10:59 am

Its basic diagnosis... Theyll plug in the scanner and see if theres any codes.

Post by **blind6** » Tue Dec 20, 2005 1:46 am

So if it says no codes that's my green light to start doing other things to the motor? What kinda work do you do on ECU's and what kinda prices would I be looking at? Is everything vehicle specific as far as what mods are done or is it just what the owner wants to achieve?

Post by **elwesso** » Tue Dec 20, 2005 5:34 am

We dont do the ECU mods on the Y33 Q yet... Not looking too good either.

Post by **Vinsanity** » Tue Dec 20, 2005 8:14 am

elwesso wrote:chopp that stuff is fairly out of date... things have changed. i gotta change that crap sometime......

one thing that the factory did was retard engine timing when the car first started off..... this was so when you floored it, the car would not lurch forward...

remember that any 32valve V8 with a 4 speed auto (with grandma gears) in heavy car will not have very good low end response...

I suppose that makes sense, but I swear the 97 STS I test drove before buying my car felt like it had better off-the-line response than my Q45...did Caddy actually not retard the timing on the Northstar?? please don't tell me they actually moved past using grandma gears while we still had em!

YouTube · Post by **Jesda** » Tue Dec 20, 2005 8:22 am

The STS is indeed quicker off the line and up to 80. But past that I think the Q has the advantage.

Post by **Vinsanity** » Tue Dec 20, 2005 8:38 am

hah. well damn if the Caddy I test drove didn't have the suspicious valve tap that kept me from buying it

I love your guys's icons

Post by **Flagship-Q** » Tue Dec 20, 2005 10:53 am

Hey Wes, on this subject, does the ECU program (G50) your working on address this or change any of the perimeters of the stock ECU program? What I mean is, does it change throttle response etc? Just curious if it can be programed for instant response and so forth. Thanks!

Post by **elwesso** » Tue Dec 20, 2005 10:55 am

Flagship-Q wrote:Hey Wes, on this subject, does the ECU program (G50) your working on address this or change any of the perimeters of the stock ECU program? What I mean is, does it change throttle response etc? Just curious if it can be programed for instant response and so forth. Thanks!

Yeah. the factory has (like I said earlier) ignition retard when you hit the gas.. Ours eliminates that...

YouTube · Post by **Jesda** » Tue Dec 20, 2005 12:54 pm

Vinsanity wrote:hah. well damn if the Caddy I test drove didn't have the suspicious valve tap that kept me from buying it

I love your guys's icons

Thats just from carbon buildup, easily resolved with some hard runs. The Seville and Eldo are great cars, and I might buy one in 06, but they dont hold a candle to the Q for reliability.

Post by **Vinsanity** » Tue Dec 20, 2005 1:08 pm

Jesda wrote:
Thats just from carbon buildup, easily resolved with some hard runs. The Seville and Eldo are great cars, and I might buy one in 06, but they dont hold a candle to the Q for reliability.

hence my decision ^_^

at this point I'm willing to sacrifice 24 horses and the ghetto FOBulous image for something more likely to make it to the 200k mark

if the right one comes along, I definitely won't be passing it up, though

Post by **nchopp** » Tue Dec 20, 2005 1:10 pm

Vinsanity wrote:at this point I'm willing to sacrifice 24 horses and the ghetto FOBulous image for something more likely to make it to the 200k mark

Pish, 200k is easy. I'm at 196 already and she's not even tryin'.

Post by **Vinsanity** » Tue Dec 20, 2005 1:38 pm

well, some people would say that I'm not exactly easy on my cars. but if you ask me, I just think my cars don't like me (to the point where they'd rather die)

Throttle response

Throttle response

Re: Throttle response (blind6)

Re: Throttle response (nchopp)

Re: Throttle response (nchopp)

Re: Throttle response (blind6)

Re: Throttle response (nchopp)

Re: Throttle response (elwesso)

Re: Throttle response (blind6)

Re: Throttle response (elwesso)

Re: Throttle response (blind6)

Re: Throttle response (squeefoo)

Re: Throttle response (blind6)

Re: Throttle response (Rex)

Re: Throttle response (blind6)

Re: Throttle response (maxnix)

Re: Throttle response (elwesso)

Re: Throttle response (blind6)

Re: Throttle response (elwesso)

Re: Throttle response (blind6)

Re: Throttle response (elwesso)

Re: Throttle response (blind6)

Re: Throttle response (elwesso)

Re: (Jesda)

Re: (Vinsanity)

Re: (Flagship-Q)

Re: (Vinsanity)

Re: (Jesda)

Re: (Vinsanity)

Re: (nchopp)

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