all of this=

 

we have had members to before and after track runs with the cai only to gain trap speed with a stock air box vs the cai. what else do you want?

 

like i said if you are happy with your purchase, great. i just try to look out for other members. whether you take the advice is up to you. this message board is here to inform and a platform for us to learn. i thank god its here otherwise i would have no idea wtf to do with my car. i think everyone who has contributed so that i could make the right decisions on my past supercharger purchase and now my built tt purchase.

 

Silence Yeti!

 

Havent seen any of that. Was it one run or two? How large/little of a loss?

Edit - +1 for your reply to Quad. I think with attitudes like this it keeps us from going ape **** on eachother

 

if you can't make power on a dyno with a part how else will you verify a gain or loss? people have tested on many different setups on the forum and posted their results if you search you will see they all lost power. if you actually drive your car 140+mph at 6500 rpm maybe you will see some gain, but highly doubtful.

 

like i said.. the differences were nominal. your talking 2 to 3 mph trap difference and a 3 to 5whp on the dyno difference. nothing that you are really going to notice but then again, i wouldnt want to put a performance "mod" on my car that didnt gain anything and worse that lost anything even if it was nominal.

 

Ok I'll drop the defense....You all have been driving/building your Z's longer than me. I would expect you know more than I do about this whole thing...Thanks for your interest, and effort to keep me from doing something stupid...I'll be the first to admit Im wrong if this blows up in my face...wont be the first time...Love the forum and dont have any desire to make enemies...So your on board with the spacer...what is your opinion of the MREV2? Worth the money?

 

if i had a revup, thats the first thing i would get, mrev2.

 

Nexx - whats your opinion about the UR pullies? I am thinking about getting those installed in a couple of weeks, but there are those who say both good and bad on it. Id rather just get the iso spacer if the pully will cause issues.

 

not worth it unless you get it cheap and you can install it yourself. i had one when i was n/a. i felt nothing. UR is the only one i would even consider too. unless you have already done everything else, the pulley would be very low on the list of things to do.

If i was still N/A here is what i would do.

-bassani, turboxs, fast intentions 2.5", or hks exhaust
-resonated test pipes
-plenum spacer
-lightened flywheel
-Utec and a good tune.

you should be good for around 270 to 280whp with all those if you have a revup or DE motor. 280+whp with HR motor minus the utec.

 

Wrong and misleading information. 2-3 mph trap difference at the 1/4 mile is NOT nominal. To gain 2-3 mph, it requires more than 3-5whp on the dyno.

Another wrong information. For non-revups, dynos have shown that MRev2 yields about the same gains as the spacer. For revups, MRev2 does NOT do as much as it does on non-revups. For revups, spacer is a better choice. If you can afford it, getting both will be optimal for both revups and non-revups. I have both and I've read every single thread on it and was also one of the first to purchase the MRev2.

+1 on not being worth it and . As far as installing it, it's probably one of the easier mods to do. And as for "feeling" any gains for ANY single N/A mod, throw that idea out the window. Combination of mods can be felt, which is still subjective, but 1 single mod does not yield enough gains to be felt.

As far as different companies of pullies go, UR has shown to be less prone to improper installation and in turn, less damage done to the engine. A search will yield pages upon pages of information regarding problems with pullies (underdrive or lighter).

For the mods list:
- most exhaust will yield similar results, so this is personal preference
- popcharger or k&n drop in
- plenum spacer
- non-resonated test pipes (welds on resonated will break - ask me how many times I broke the welds)
- utec + tune


I'm not knocking Jason, but I've done research too, plus personal experience (especially in the N/A dept). I'm all about having the perfect combination of mods that will yield the greatest gains and I prove it through proven numbers from the drag strip (compare my et/trap to others around similar or better rank as me and notice they have much more mods than I do + tune).

 

maybe 1-2mph would have been a better example. either way its not something significant enough to 100% without a shadow of a doubt say that cai had anything to do with the loss.

i think you got it backwards, the mrev2 was designed for the revups. the gains back the torque disadvantage that the revup has vs the de.

straight from motordyne site: "Multiple independent test show when used with a 5/16" spacer on the REVUP engine, the combination will add a "minimum" of 15+ HP and 18+ TQ in the upper midrange. Many independent MREV 2 Manifold REVUP tests have dynod in excess of 20HP and 30 TQ in the upper midrange and with high RPM peak power increased by 3-5 HP."

noway is a spacer gonna give you those types of results on a revup or de.