Have you thought of getting rid of the front precat.. I've looked at it.. and it's very restrictive..

 

Time for a a data logger.

I have similar findings with my VQ35 6000+ ...

 

Hey Zack

Can you email me your recent runfiles? My email is iilac1@hotmail.com

Thanks

 

sent... who else wants them?

 

HP is derived from TQ, but RPMS are also part of the equation. In a nutshell, more TQ @ higher RPMs equals more HP.

And yes, there were TQ gains...not peak number...but there's a major difference in TQ over the USIM at high RPMS. You probably already know this, but essentially that's why a variable intake makes more HP at high RPMs over the USIM - more high end torque.

 

bizzy1999@hotmail.com

 

i got a call from Jim Wolf Some bs about my engine not making enough vacuum to hold the mevi open. He said they will write me a new emprom which they will richen up the fuel a bit. look like this is going to keep costing me $$$$. i hope all you 1999's are greatful

 

Sniff Sniff

I smell BS.

 

nice run with the mevi..anyone has runs to compare 00vi and mevi?

 

MEVI owns 00VI on NA....i dare anyone with 00VI and stock ecu without SAFC or Any other piggy back to top those numbers for my STOCk ECU/MEVI RUN.

 

get a vacuum gauge and check engine vac then check the vac canister and check valve.

 

To really compair, we'd need someone with a 99 cali spec, 5spd, and 00vi. Anyone on this site with a setup like that? Oh yea, same mods you have also, like the y, cat, exhaust, intake, even the grounding kit.
I'm sure that will be hard to find. Till then, nothing owns anything.

 

BS. I installed it and its pulling good vacuum. I'm going to put some cash away to go dyno in a few weeks.

 

First of all, AWESOME numbers!! This thread has inspired me to dyno next week to compare.
I have MEVI/JWT ECU and I have suspected what you said about the timing being pulled to prevent detonation for a while. It almost feels like I have a bad knock sensor or something.

Well I have three questions. Are you still considering a SAFC II?
Are you driving around with the stock ECU now?
How close were runs 32 and 34? the only reason I ask is that maybe your car was very hot when you ran with the JWT ECU. I remember they would always have me wait like 20 minutes in between runs at my local dyno.

I'll try to post my upcoming dyno along with my old dynos next week.

 

What other cars produce compared to yours can never be a perfectly valid comparison. Different mods, different dyno machines, different engine condition, all have an effect on final power output. The only really valid comparison is to test on the same car and using the same dyno machine. Which is what I did with a boosted car and BSwithTF did NA.

The fact that you refuse to consider my dyno (because my car is boosted) and BSwithTF's (because it is an automatic and not a manual!!!!) prove you are not unbiased.

 

I don't know deezo it wasn't opening on some runs it didn't open so i think he is right. Maybe that check valve is dead. its cool though i can swap it out since i have a couple.

 

Stephen Max i apologize. I don't intend to invalidate either your dynos or BSwithTF's. I marely dynoed for my own good. I have always dynoed my car on the same dyno and i have dynoed on 4 seperate ocassions to try to prove and disprove myths. I only try to be realistic. I just find it hard that everyone can assume that 00VI is so much better than MEVI without more dynos from 5speed cars with 00Vi conversions.
I am a Mechanical Engineer, i have learned that you cannot always make assumptions based on what you think will happen. I try to amass as much data as i can then come to a conclusion analythically.
Based on what i have seen well on my car atleast i have lost no TQ and gained 20whp from MEVI install without the JWT ECU. My car is a 1999 and apparently i am JWT's test bed for their new 1999 upgrade because i will be sending back my ECU for a new custom Eprom.
All my dynos have been conducted at the same dyno by same dyno operator many times with other reputable org members present. I am not trying to be smug but i do strongly belive for all the additonal work required to get the 00VI retrofitted to a 4th gen it isn't worth the minimal gains.

 

I agree 100%. All this bullsh!t about the 00vi being vastly superior seems to be purely speculation. Until we have a 5spd, stock ecu, mevi vs. a 5spd, stcok ecu, 00vi, it should be treated as such. I'm sure the 00vi probably produces similar gains, but I doubt any thing drastically better. So far, as far as I can tell, the low end loss with the mevi appears to be bullsh!t as well.

All of this is almost like all that crap about the 00-01 5spd tranny being a stronger unit... When as soon as Neal cracked a 5th gen tranny open to see for himself, it proved to be a bunch of crap that some one some where started with out any evidence.

 

The lapse of logic in this post pretty much takes my breath away.

It has been proven that the 00vi is superior to the MEVI. I have seen no evidence that suggests otherwise.

Gains of 8-14 tq over a wide range of the power band may not be "vast", but they are getting pretty close to it for this type of mod.

Zack makes a valid point about effort/hp, and I respect that.

To compare the dynos I and Travis provided and compare them directly to the tranny strength issue is quite puzzling and almost offensive. And I'm being kind when I say "almost". I'll just assume you were not sober-minded when you came up with that red herring.

Nothing that Zack has done has proven anything about MEVI vs 00VI performance. Zack got good numbers with the MEVI. Good for him.

If you and Zack choose to totally ignore the MEVI vs 00VI comparisons that have already been done, then the only way you can substantiate your hyperbole is to fit Zack's car with the 00VI and test again, no other changes. I predict Zack will get even better performance.

 

I've said before that the fastest 4th gens with a 3.0 engine have the MEVI.

 

The dyno evidence shows that they will be even faster with the 00VI. Mine is.

 

HEHEHEHE!!!!!!!!!!!!!!!!!!!!

We need timeslip evidence.

 

To me, its not worth the money and time to switch from MEVI to 00VI. It is alot more work, for gains that are not that huge. I think it would make the car easier to drive around town with a little torque replaced, but at the track, I don't know if it would improve times. How much time is spent below 4500rpm at the track anyway?, just a little in first gear where traction is a bigger problem anyway. The other little gain from the 00VI is from the smoothness of the plastic compared to cast metal, it would be similar to EH'd aluminum. That, being said, if someone wants to purchase an 00VI for me, I will dyno test it and track test it at no extra charge.

 

I hear ya. I'd invest in something else for the extra gains. 00VI is not the savior for the VQ if you already have the MEVI.

 

The 00VI is still 'new' in some respects, come on guys, give it some time, the MEVI has been out for a while, plenty of time for people to get out and tune and run there best times

 

But if you didn't already have the MEVI and are starting from the USIM it seems worth it to go with the 00VI as long as you don't mind the work and can do it.

 

True but my argument is does the additional work warrant the minimal gains. I really wish some of the guys on here would cowboy up and spend the $100 for an hour of dyno (dynojet for comparison reasons) time to prove me wrong or if not that just head to the track.
Basically my understanding of that is they will not see any more gains than would be had with regular USDM manifold. Less tq off the line will help with the launch and once you get going the MEVI topend should take you home pretty good.
I believe it was SMX95 who ran a 14.2@97 with MEVI and no ECU.

 

Well everyone's definition of "worth it" is different I suppose. For me the extra work required wasn't that big of a deal but I understand that to others it may be.

I have yet to go to the dyno or track since putting mine on a few months ago... just had a plethora of things on my plate, that and being broke. haha. I am still aiming to get at least one dyno session and a few track days in before the end of the season. But my dyno will not be that useful for comparison purposes as I never had a MEVI, just switched from the USIM.

 

Well, $ per Hp would be a better equation.

 

This is like the y-pipe to headers comparison.
If you have never bought a y-pipe then headers would be the better option performance wise. But going from the y-pipe to header combo is a waste of money and trouble for 5 hp.

00VI to MEVI, if you want all the power possible and you don't have a MEVI then go with the 00VI otherwise the gain from the 00VI above the MEVI is not worth the trouble and perhaps the money.

 

Sorry to have been offensive, but I am a skeptic. Always have been always will be. I require an overwhelming amount of information in order to come to a sound decision. The mevi has this, the 00vi does not. Maybe that will change in time but since I dont feel like waiting, I have to go with what information is available. If the 00vi did not require the extra amount of work that it does, I might not have really cared. And from what I can tell, there is no profound advantage thats warrants the extra work involved... At least for me.

 

Especially since you will be boosted......I think the 00VI is a better design but its not worth the hassel for the minimal gains and i hate how there are all these threads claiming it is so superior to MEVI

 

Exactly.

 

Didn't somebody say "MEVI owns 00VI"?

 

oman..look what i started...lol..i still need to install my 00vi..dont have time to do it =/

 

on my car it will..

 

But you don't actually know this to be true. You've never installed one on your car. The only thing we can be sure of is, we saw good gains on your car with the mevi. You can't just come out and say one will work better on your car than the other, when you've only tested one of the choices.

 

If you've never tested both 00VI and MEVI it is unfair to come out and say it 'owns' it.. I was afraid you would get 'cocky' if you got a great number and put the others down.

 

well until some of the guys with 00VI dyno on a dynojet (for realistic comparison reasons) or go to track and bring home some promising #'s i stand by what i have said.

my Time to beat with Stock Intake manifold,Stock ECU, Warpspeed Y-pipe,Greddy Exhaust,Jwt popcharger and Grounding kit was 14.7@93mph.
When i ran this my car was making something like 176whp and 18xwhtq.

 

can't stand being corrected??????? it was proven time after time b4 that vi owns mevi however there are odd maximas from the factory maybe or maybe all 99 maximas have different programming and can somehow adapt to the flaw the mevi has but that doesn't mean mevi is better than 00vi in general maybe in your car NOT EVEN cause you never tried the vi00 on your car you could be even faster with the 00vi who knows