my dyno runs are on the same dyno. have been for a year and half. it is a new dyno jet at that. year and half old. old dyno jet's read higher.

1 degree of timing is 5 whp in my car.

the entire fuel control settings between rodimus's car and mine are completely different.

it just astounds me as to why people think it is such a miracle. it's not like im running some serious race tune or something here.

first off. don't ramp the timing in. you lose a lot of torque.
second. rev it over 7k. stock springs are fine to 7400. this applies to the tvs. not m62.


i ringed mine to 8k every single pull tonight for 12 pulls. 6 of those were no changes and every single time power was the same. no i don't have stock valve springs. hell im not even running the smallest pulley either. just a simple 3.1

 

For your information, my last dyno was 318/288 @ 7,395rpm w/ afr of 11.9 and 17* timing @ 69*F w/ 48% humidity; and was still on the way up. Stock air box mod, pacesetter header, 3" catless dp, 3" custom exhaust, secondary cobra h/e, no meth. IAT2's topped at 133*F after the third pull

Now go ahead and call bs on me all you want. My best friend is in auto performance at Ohio Northern University and liked to take my car up there to tinker around on. I'm not here to boast numbers and give in to the naysayers that are all over .net.

 

Well i am i trapped 91 in the 1/8th

 

thanks for the info I am alwais worried above 7200

how is the TVS compared to the eaton for heat soak ?
Only Mase with Rebel has taken the step to go the extra mile in my area
and i am really interested about getting away frim the the heaton

 

All your questions are answered in other threads, namely the TVS FAQ thread

https://www.cobaltss.net/forums/advanced-performance-modifications-130/faq-tvs-harrop-lsj1320-you-143475/

 

It does very well, i tested the absolute extreme at 28 psi and iat's were 145 at through the traps at 115.

 

raw ranks right up there with ed's shop in the middle of the desert selling stp oil from a can.

the case heat soaks faster due to it's size. it's a more efficient blower all around. lower iat2's and more air flow.

whoa whoa whoa. wait a second. 115? weksos!

oh wait. you started in second and couldn't shift above 6k

carry on!

 

the IAT2 will be cooler assuming all other factors are equal, as would the IM and the water throughout the HE system. Therefore, the TVS will not heatsoak the system as much as the M62...which is why everyone swaps instead of just lowering pulley sizes.

 

lolz another fail of a clutch by tag/rebel

The tvs is a roots blower not a twinscrew

 

The TVS does not do compression inside of the housing, it is still a roots style compressor, not a screw type.

The blades look like a screw but there is no compression going on inside the blower.

 

fair enough. i stand corrected. ill go edit that now....lol

 

i will have a fully built top/bottom end here shortly... what is lowest pulley size i can run to get the most power out the tvs?

 

im not callin bs on the numbers. mine did 307 on 17 degree's and 10.9 afr tonight on the rollers. i wasn't aiming to push the car to make massive numbers. been there done that. about once every 4 months i'll play around on the rollers to see what kind of shape the motor is in. don't compare summer gas to winter gas. winter gas cost me over 15whp

 

I would go with a 2.9" at first and see where you end up im pretty sure no one went as low as i.

 

I dunno what it cost me power wise, but I know it's cost me mpg's....

 

sorry my bad must be tired
Raw had a twin screw not a TVS

 

how low did you go to get the 28psi and did you survive that ****?

 

2.75 IIRC and he has a magic motor like 06g85blkss

 

that was a 2.5" custom pulley by nate, the 2.75 was 25 psi

 

lol, that's just how this forum thing works. Everyone learns off each other.

Except for Area, he breaks into people's houses at night and steals their wine corks. Not quite sure how that helps him but who am I to judge?

 

so just out of curiosity, would it help if you tried to port the TVS at all? and i noticed that is doesnt the silencer holes like the m62 yet it is still a quieter whine for some reason any one know?

 

well, lets do this. i talked Josh about this once or twice in PMs

 

The TVS is designed for maximum performance and a direct statement from HARROP itself states: "Porting the HTV1320 can and will decrease performance and void warranty. Through extensive testing it has been designed to be the most effective directly from the manufacturer"

 

The backflow ports are to reduce the the operation noise, the tvs uses the four lobe design and increased twist from 60* to 160* so it operates much quieter than your standard roots. Hence the reasoning behind ditching the backflow ports.

The is no reason to port the tvs though its inlet and outlet are rather optimal for the lsj.

Shoot me a pm

 

so does everyone feel that with a full exhaust and a decent tune with meth the TVS can be a 110+ trap speed without endangering the stock pistons?