Agreed. Atleast do a 2.6. 2.7's are a waste

 

I ran a 2.7" for two years then ran a 2.6" for about a month before I bought my TVS. The 2.6" did feel nice! Go for it...

 

im on a 2.7 now and cant wait to go smaller....

 

how crazy are the IDC's on 60's and 2.5? ive got 80lbers but i can get the 60's to idle so much better. this was all on a tvs, getting ready to put a 2.5 on my m62.

 

I thought the 80's were supposed to idle better than the 60's? I believe both idle just fine if you use the correct injector numbers in the injector spreadsheet.

 

with the 80's they were not horrible. but with the AC on it didnt help any either. the 80's numbers are from the spread sheet

 

Sounds good. I just bought some 80's today so I can pulley down the TVS. I'm hoping they run well.

 

The people that run a 2.5 and 4s are a retard and should not own a tuner car. My IDC with 42s and 2.9 pulley hit about 70% so a 2.5 and 42s would be through the roof.

 

The best of the best tuners on this site don't drop below a 2.7

For the last time, there are PLENTY of VERY educated posts from back when most people on this site knew what they were talking about that describe very technically how the blower is overspun, becoming inefficient below a 2.7

Think of it like taking your redline all the way up to 8000rpms just because generally you make more horsepower at higher RPMs -- but your peak horsepower is at 5000rpms. Stupid right? Yeah, that's why I don't understand how people think, "Well, the smaller I go the more horsepower I make -- so let's shrink this baby to the size of a thimble!"

end thread/

 

Hmmm. not /thread.

Smaller Pulley = More WTQ
WTQ = Won Races

Torque is real, Horesepower is a number based on Torque

Running meth, porting blower, etc can make the M62 more efficient.

TVS with smaller pulley is even better

 

And what percentage of the time are you actually high enough to "overspin" the blower. Max RPM and Max Sustained RPM are two different things. If you want an efficient pulley, STOP at a 3.0

BTW, many of the people you are describing that are educated and not below a 2.7, in fact WERE below a 2.7 before jumping to a different power adder or platform.

 

my 80s idle just fine.

 

yes i know ive got some work to do on 80's ive only ran them for a week, with little fine tuning. i was simply asking if anyone had any idea what IDCs were on 60's and 2.5 on m62. i did forget to mention meth though.

 

Well on a 2.6 my 60's were in the 70's IIRC

 

Way back before there was the info there is now, my LSJ ran a 2.7" pulley on 42# injectors, no cooling mods, custom SRI, tracked all the time with back to back runs, almost always beat on (it was too fun to drive it nicely)... and a rev limiter of at least 7500... and it took 22k miles to break her down.

They are pretty durable engines...

However that doesn't mean you should run it irresponsibly with what's available now to run a safer & more efficient set up. It's all about what you are willing to risk.

 

wow it just goes to show you dont know jack **** if you look at a dyno graph and you peak at lets say 7000 but it dosent fall of utill 7600 then shift right before it falls off the less you have to take the time to shift the faster you will go and smaller pullies wont yeild much hp but will increase the tq greatly tq is what wins races and makes you go

 

But remember John, the M62 dies off after 6500 or so with stock head/cams. Other than that technicality, I agree lol. TVS will make power up to 8k with valvetrain and head work, cams only change the area of the powerband from my experience

 

a good set of cams will add power and change when it comes on and you havent messed with cams so you have no experience with it and the m62 dosent fall off past 6500 nor do the stock cams how do i know my engine peaked at 7300rpms and held strong till 7800 with stock cams

 

Took it too literal. My experience = "From what I have seen". But w/e, no further discussion will be useful

 

i call bullshit. lets see a dyno graph

 

ive run every pully from a 3.0 to a 2.5 except for the 2.8. i personally found to like the 2.6 the most. i had full exhaust, intake, s3 H/E, and meth injection w/ a 5 gph nozzle. the 2.6 was the best happy medium of good low end torque and not heaksoaking like a **** immediately. so i vote 2.6.

 

dont matter if i posted it or not people wouldent still call bs so man up and go try it

 

i know it because i have tried it. power peaked at 6800rpm for me dropped off quite hard after that

 

there can be a usefull discussion but no has really put cams to the test other then zzp and they have had great sucess with it look at turbo tim even though he has a stroker he still put 360 down with cams and yes the stroker helped in the hp department but not that much. it the stroker helps way way more in the torque department

well not for me ill give you a hint go play adj cam gears and let the learning begin

 

nah for now its just going to be turbo swapped on stock motor. when the built motor is ready i will play with the cams