im sure this has been asked a million times but ive searched and cant find the answer.at what pulley size do you hit the max rpm of the tvs.i went through 3 m62 blowers from running 2.6 and 2.5 pulleys.i would like to get more out of the tvs but i dont want to be buying a new one every 30k miles. so which pulley puts it at or near the max rpm if im running at 7000 rmps?

 

.................... probally wont be ever able to get to spin it at max rpm anyways.

 

In testing the max rpm they held for continuous operation was 18k. The blower saw upwards of 22k in brief testing with no issue.

2.5" is the smallest you would want to run. Not becuase of the blower.

 

if the continuous operation of 18k rpm...the question is what can the engine handle, even if built.

 

engine should be able to handle quite a bit built. Sleeves, pistons, ported head and all.

 

interesting sub'd

 

ya thats a pretty high rpm, where is the tvs most efficient?

 

Crank Pulley / SC Pulley = Pulley Ratio
Pulley Ratio * RPM = SC RPM

Crank Pulley = 6" (or so my searching has found)
SC Pulley = 2.5" (let's assume the smallest pulley made)
RPM = 7000 and 8000 (we'll test both)


6" / 2.5" = 2.4
2.4 * 7,000 RPM = 16,800 RPM


6" / 2.5" = 2.4
2.4 * 8,000 RPM = 19,200 RPM

 

yea, and you aren't going to sit at 7500-8000 for any continuous operation. So I'd say a 2.5 would be perfectly fine.

 

wow i didnt know these blowers could handle that much.i just bought the 2.7 pulley for it.i want to see what kind of heat i see from this before i make a decision to go smaller.my max iat2 on an 80 degree day at wot with a 2.9 was 105.so i think it will be ok.

 

hahaha at this guy . my iats are 156 in fl and I'm dropping to a 2.6 next week

 

Damn I knew these blowers were good but I didn't think they'd be able to handle all this. That's awesome.

Just hope the engine can keep up if your going crazy with a 2.5" pulley

 

According to the efficiency map for the TVS 1320 the best efficiency is up to about 12K RPM. The efficiency is pretty good until you get above 16K RPM then the efficiency starts to drop alot.

 

Over 9000!!!

 

slowswap is close, but 100% perfect. the crank pulley is a bit bigger than 6 inches. but you get the idea.

small pulley = torque. this equals win.

 

I want to know how you went thru 3 m62's? I ran a 2.6 pulley for 50,000 and not a single issue. The rest of the first post has been discussed. Area is correct. You an not spin the blower high enough to cause catastrophic damage to the blower. The motor tho...

 

i LOLed

 

Have you looked over a map for the m62? Suddenly that 17k rpms looks reall good

 

That's why you do every possible mod to lower PSI so efficiency goes up.

 

i live in south florida so it gets hotter,i just happed to be tunning on a cooler day.i dont know how i went through 3 blowers,i sprayed meth through them if that does anything to the blower.but they only lasted about 30k miles each.

 

meth eats the coating on the blower, but idk if it would make you go thru 3 of them...what mix were you running?

 

so if the efficiency is good to about 16k and a 2.5 spins to about 16.8k at engine 7k rpms... i need a 2.5

 

Just ask area. Meth does NOT eat the coating on the M62 or the TVS. That was older blowers.

 

The rpm is not the only determining factor in efficiency, PR is just as, if not more important.

 

LOL. Yeah, the TVS at 17K is still as efficient as the M62 in its highest efficiency range.


Agreed. If you can get the engine to flow well you can keep the TVS in a good efficiency range all the way up to 19K.