HARROP TVS, What You Need To Know & FAQ
06-01-2011, 08:10 PM
#276
Hey guys I had a quick question. Who would you guys recommend as far as tuning the tvs. Im in PA and wanna go to someone who really knows what they're doing and possibly have them install it for me? I wouldn't mind doing it myself but I feel too uncomfortable driving it a long distance to a good tuner. Does BYT know what they are doing as far as the tvs goes?
06-30-2011, 05:20 AM
#282
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im stage 3 right now but want more power and tq this is my set up right now. what would i or could i make to the wheels with this setup and a TVS ?
3.1 pulley or 2.9 for the tvs not sure which one i should run.
current mods 2.9 pulley shorter belt 80lb injectors s3 heat exchanger dual pass end plate option b bkr7e spark plugs zzp mid length header zzp 3inch down pipe stock exhuast ( u grading to a full 3 inch exhuast) making 16psi on a zzp can tune.
what psi can i expect with a 3.1 pulley or 2.9 and a good spot on tune with all the above mods. i have when upgrading to a tvs ?
3.1 pulley or 2.9 for the tvs not sure which one i should run.
current mods 2.9 pulley shorter belt 80lb injectors s3 heat exchanger dual pass end plate option b bkr7e spark plugs zzp mid length header zzp 3inch down pipe stock exhuast ( u grading to a full 3 inch exhuast) making 16psi on a zzp can tune.
what psi can i expect with a 3.1 pulley or 2.9 and a good spot on tune with all the above mods. i have when upgrading to a tvs ?
07-03-2011, 06:01 PM
#283
Looking into this for my LE5 2.4L Auto, the M62 is clearly limited by its design and they dont call it the Heaton for nothing.
I'm thinking: 3.4 or larger pulley, not looking for crazy boost. Between 10 and 12 PSI, with my 20% displacement advantage and full exhaust 3.4 should put me there.
I'll add Option B, Phenolic gasket, 78# springs and do a Port on the head and add some ARP studs to keep it all together and flowing fast.
Not many 2.4s with the TVS, but I think it can work great if boost is kept lower.
One thing, 5 rib belt on LE5s, do I just run it on the 6 rib pulley wherever it fits best? As in, leave a rib empty on the pulley?
Informed comments welcome, I'm thinking hard about this TVS.
I'm thinking: 3.4 or larger pulley, not looking for crazy boost. Between 10 and 12 PSI, with my 20% displacement advantage and full exhaust 3.4 should put me there.
I'll add Option B, Phenolic gasket, 78# springs and do a Port on the head and add some ARP studs to keep it all together and flowing fast.
Not many 2.4s with the TVS, but I think it can work great if boost is kept lower.
One thing, 5 rib belt on LE5s, do I just run it on the 6 rib pulley wherever it fits best? As in, leave a rib empty on the pulley?
Informed comments welcome, I'm thinking hard about this TVS.
07-03-2011, 08:23 PM
#284
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Looking into this for my LE5 2.4L Auto, the M62 is clearly limited by its design and they dont call it the Heaton for nothing.
I'm thinking: 3.4 or larger pulley, not looking for crazy boost. Between 10 and 12 PSI, with my 20% displacement advantage and full exhaust 3.4 should put me there.
I'll add Option B, Phenolic gasket, 78# springs and do a Port on the head and add some ARP studs to keep it all together and flowing fast.
Not many 2.4s with the TVS, but I think it can work great if boost is kept lower.
One thing, 5 rib belt on LE5s, do I just run it on the 6 rib pulley wherever it fits best? As in, leave a rib empty on the pulley?
Informed comments welcome, I'm thinking hard about this TVS.
I'm thinking: 3.4 or larger pulley, not looking for crazy boost. Between 10 and 12 PSI, with my 20% displacement advantage and full exhaust 3.4 should put me there.
I'll add Option B, Phenolic gasket, 78# springs and do a Port on the head and add some ARP studs to keep it all together and flowing fast.
Not many 2.4s with the TVS, but I think it can work great if boost is kept lower.
One thing, 5 rib belt on LE5s, do I just run it on the 6 rib pulley wherever it fits best? As in, leave a rib empty on the pulley?
Informed comments welcome, I'm thinking hard about this TVS.
i know you probably already modified it to fit your m62 but you will probably have to modify it even further to allow for adequate space
08-17-2011, 11:52 AM
#289
and then lots more...
4 1#hr injectors, one at each cyl in each port
pumped very high velcity
o ya and a brfpr for the fuel
bigger injectors psssshhh just run the ones i have more efficiently
id love to get some nitrous and run this setup
so i could be the only 4cyl running 12 injectors hahaha
but ill prob just pump it into my intercooler to keep temps even lower than they already are
4 1#hr injectors, one at each cyl in each port
pumped very high velcity
o ya and a brfpr for the fuel
bigger injectors psssshhh just run the ones i have more efficiently
id love to get some nitrous and run this setup
so i could be the only 4cyl running 12 injectors hahaha
but ill prob just pump it into my intercooler to keep temps even lower than they already are
08-18-2011, 01:29 PM
#293
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and then lots more...
4 1#hr injectors, one at each cyl in each port
pumped very high velcity
o ya and a brfpr for the fuel
bigger injectors psssshhh just run the ones i have more efficiently
id love to get some nitrous and run this setup
so i could be the only 4cyl running 12 injectors hahaha
but ill prob just pump it into my intercooler to keep temps even lower than they already are
4 1#hr injectors, one at each cyl in each port
pumped very high velcity
o ya and a brfpr for the fuel
bigger injectors psssshhh just run the ones i have more efficiently
id love to get some nitrous and run this setup
so i could be the only 4cyl running 12 injectors hahaha
but ill prob just pump it into my intercooler to keep temps even lower than they already are
08-18-2011, 01:53 PM
#294
22,000 
Assuming we had a head that could flow the massive amounts of air it would produce at that speed, this is the pulley size you'd need, and the engine rpm youd have to spin to:
(22,000 * Supercharger Pulley) / Crankshaft Pulley @ 6.25 = Engine RPM)
2.3 @ 8,096 = 22,000 rpm
2.4 @ 8,448 = 22,000 rpm
2.5 @ 8,800 = 22,000 rpm
2.6 @ 9,152 = 22,000 rpm
2.7 @ 9,504 = 22,000 rpm
2.75 @ 9,680 = 22,000 rpm
2.8 @ 9,856 = 22,000 rpm
2.85 @ 10,032 = 22,000 rpm
2.99 @ 10,525 = 22,000 rpm
3.06 @ 10,771 = 22,000 rpm
3.10 @ 10,912 = 22,000 rpm
3.15 @ 11,087 = 22,000 rpm
3.30 @ 11,616 = 22,000 rpm
3.34 @ 11,757 = 22,000 rpm
Edit: Oh you said most efficient, I understood "max rpm". Ah well. lol
While I'm here, figure I'll share this:
This is the TVS performance map converted from Volume to the more familiar Mass using an assumed air density of 0.076 ft^3/lb.
The conversion I used was:
Volume m^3/hr * 0.5885 = Volume ft^3/min
Volume ft^3/min * Air Density ft^3/lb = Mass lb/min
part of the durability testing we have done on all our htv range is "extended abuse" mode on our in-house and eaton-certified test cell.
We have run our generic htv1320 at 8,000rpm to 22,000rpm for 100 continuous hours, cycling the bleed valve (boost controller) from 5psi - 25psi every few minutes (its actually a lot more complicated than that).
We have not had any failures while durability testing.
We have run our generic htv1320 at 8,000rpm to 22,000rpm for 100 continuous hours, cycling the bleed valve (boost controller) from 5psi - 25psi every few minutes (its actually a lot more complicated than that).
We have not had any failures while durability testing.
(22,000 * Supercharger Pulley) / Crankshaft Pulley @ 6.25 = Engine RPM)
2.3 @ 8,096 = 22,000 rpm
2.4 @ 8,448 = 22,000 rpm
2.5 @ 8,800 = 22,000 rpm
2.6 @ 9,152 = 22,000 rpm
2.7 @ 9,504 = 22,000 rpm
2.75 @ 9,680 = 22,000 rpm
2.8 @ 9,856 = 22,000 rpm
2.85 @ 10,032 = 22,000 rpm
2.99 @ 10,525 = 22,000 rpm
3.06 @ 10,771 = 22,000 rpm
3.10 @ 10,912 = 22,000 rpm
3.15 @ 11,087 = 22,000 rpm
3.30 @ 11,616 = 22,000 rpm
3.34 @ 11,757 = 22,000 rpm
Edit: Oh you said most efficient, I understood "max rpm". Ah well. lol
While I'm here, figure I'll share this:
This is the TVS performance map converted from Volume to the more familiar Mass using an assumed air density of 0.076 ft^3/lb.
The conversion I used was:
Volume m^3/hr * 0.5885 = Volume ft^3/min
Volume ft^3/min * Air Density ft^3/lb = Mass lb/min
Last edited by Pyros777; 08-18-2011 at 02:52 PM.
08-21-2011, 12:48 AM
#295
so what is the rpm range tat the supercharger is most efficient fromi.e. 7k -15k K just numbers.
it wuld be a fun experiment to play with pulley size based on engine rpm to figure driving input, and see what the tvs would be most efficient driving at... or maybe it spast my bed time
it wuld be a fun experiment to play with pulley size based on engine rpm to figure driving input, and see what the tvs would be most efficient driving at... or maybe it spast my bed time
08-22-2011, 01:36 PM
#296
Best bet is to pop the car on a dyno and bust out a custom PID to log supercharger speed.
Also, if you trust the conversion to MAF from above, you could do MAF vs pressure ratio (PSI+14.7/14.7) on that chart using data from your log. From there you could compare it to your dyno chart, and you'd be able to see all kinds of data at least regarding what parts of that performance map our cars operate in when theyre making power.
I've done this to a certain extent with the M62 with a dyno log, but I'm not totally convinced its accurate. It is a nice illustration though.
Note: I filtered the log to only show WOT.
Looks like I made ~220whp & ft-lb at 5252rpm, 14.06psi aka 1.97:1 Pressure Ratio, and 10978 s/c rpm. Thats right about 59% efficiency according to the M62 map.
If I had had a better flowing exhaust at the time, I might have made the same power at a lower boost level, thus moving the point inward to one of the more efficient bands on the map.
Also, if you trust the conversion to MAF from above, you could do MAF vs pressure ratio (PSI+14.7/14.7) on that chart using data from your log. From there you could compare it to your dyno chart, and you'd be able to see all kinds of data at least regarding what parts of that performance map our cars operate in when theyre making power.
I've done this to a certain extent with the M62 with a dyno log, but I'm not totally convinced its accurate. It is a nice illustration though.
Note: I filtered the log to only show WOT.
Looks like I made ~220whp & ft-lb at 5252rpm, 14.06psi aka 1.97:1 Pressure Ratio, and 10978 s/c rpm. Thats right about 59% efficiency according to the M62 map.
If I had had a better flowing exhaust at the time, I might have made the same power at a lower boost level, thus moving the point inward to one of the more efficient bands on the map.
Last edited by Pyros777; 08-22-2011 at 02:35 PM.
08-23-2011, 09:12 AM
#299
serious question, has anyone run a crazy small pulley on a tvs and set the boost limit at 20psi? curious if it can be made to put out a better trq and hp curve than a m62 across the board without generating motor destroying boost at upper rpms. also curious how effective the car is at limiting boost with the bypass valve and how it affects iat2s and such.
