HARROP TVS, What You Need To Know & FAQ
Since the previous thread has gotten lost in the shuffle and ran into a bunch of useless posts, I am re-hosting this. Try to keep it cleaner this time.
**Please keep in mind the views expressed in this post are the personal experience of myself and basic info to get you started. Use the information at your own risk** For a starters: Required Bare Minimum: to get you mobile 60# Injectors Tune HIGHLY Recommended: Basically required for any decent numbers. Obviously, the 3" will yield better numbers Intake -or- 3" Intake Header 2.5" or 3" dp 2.5" or 3" exhaust Any combination of: Dual Pass (+/- Opt B), H/E, Meth Optional Equipment Smaller Pulley Clutch Solid Motor/Tranny Mounts -or- Rotated Tranny Mounts Return-style Fuel System for smaller than the "stock" 80mm pulley -or- larger injectors (72#) LS4 Throttle Body - if you can get used to the uber touchy throttle Internals Head port/polish Upgraded Valvetrain Vendors of the TVS/Harrop-lsj1320 OTTPerformance Intense Racing ZZP WickedSS2005's Personal Experience My initial setup was the bare minimum. 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. My 2.6/60's setup hit 160+ IAT2's after multiple runs and dyno'd in at 258/239. Questions 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? What PSI can I expect from "x" pulley? *note, this is with 2.5" exhaust and stock header/dp. Take off 1-3psi depending on exhaust components 70mm / 2.75" ~ 25 psi 75mm / 2.95" ~ 22.5 psi 80mm / 3.15" ~ 20 psi 85mm / 3.35" ~ 17.5 psi 89mm / 3.5" ~15psi Per Area47, note this is with a higher redline w/ upgrade valvetrain: as a slight correction to the psi reference. if you spin the motor high enough a 3.1 pulley will make 23psi. a 2.9 will make 25, and a 2.75 will make 26.5. 99% of the tvs owners will not spin their engines to 7900 to see this. i personally have seen 27psi out of the 2.75 ring i've already spent the 250 on my K&N .... will it fit up to the TVS... if not what needs to be done and/or who sells one that will fit?? OTTP has just released a full 3" intake designed for the utmost ease of use. No rubbing, clears the '07 brake lines, full stainless steel. ZZP and RAW also offer a 3" intake. Fujita F5 cai for the ss/sc is a 3" intake as well. Personally, I tested on the stock air box mod how hard is it to install any how tos or pics? What numbers can I expect? does anyone happen to know the rpm rate of the tvs as far as pulley's go and what's safe? the stock m62's safest small pulley was the 2.8, but you can get away with a 2.7. i was going to throw my current 2.75 on if i went with the tvs, which i was told by my tuner would be perfectly safe. i'm curious if i could go a little smaller and still be safe? the TVS is the stet-up I'm looking at getting. My question is, will the stage 3 pcm be safe to run with the TVS? im assuming you need the smaller belt if pulley down the TVS like the M62? |
You keep it cleaner, TOM! Im sorry for being usless :(
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does anyone happen to know the rpm rate of the tvs as far as pulley's go and what's safe? the stock m62's safest small pulley was the 2.8, but you can get away with a 2.7. i was going to throw my current 2.75 on if i went with the tvs, which i was told by my tuner would be perfectly safe. i'm curious if i could go a little smaller and still be safe?
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Originally Posted by JimHarr18
(Post 4197360)
does anyone happen to know the rpm rate of the tvs as far as pulley's go and what's safe? the stock m62's safest small pulley was the 2.8, but you can get away with a 2.7. i was going to throw my current 2.75 on if i went with the tvs, which i was told by my tuner would be perfectly safe. i'm curious if i could go a little smaller and still be safe?
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as a slight correction to the psi reference.
if you spin the motor high enough a 3.1 pulley will make 23psi. a 2.9 will make 25, and a 2.75 will make 26.5. 99% of the tvs owners will not spin their engines to 7900 to see this. i personally have seen 27psi out of the 2.75 ring |
Originally Posted by Area47
(Post 4197365)
as a slight correction to the psi reference.
if you spin the motor high enough a 3.1 pulley will make 23psi. a 2.9 will make 25, and a 2.75 will make 26.5. 99% of the tvs owners will not spin their engines to 7900 to see this. i personally have seen 27psi out of the 2.75 ring |
i was most likely going to stick with the stock fuel rail rather than go with a return system. i currently have 60's in my car, but upgrading to 79's or 80's did cross my mind, but really only if i needed to. i do not know my idc's, but on the stock m62 i have a 2.75, redline is at 7k, and my tune is not aggressive at all.
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mine was only making 18 also,so instead of spinning the crap out of it i just pulleyed down.
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Originally Posted by JimHarr18
(Post 4197360)
does anyone happen to know the rpm rate of the tvs as far as pulley's go and what's safe? the stock m62's safest small pulley was the 2.8, but you can get away with a 2.7. i was going to throw my current 2.75 on if i went with the tvs, which i was told by my tuner would be perfectly safe. i'm curious if i could go a little smaller and still be safe?
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yeah, i have no plans to raise my limiter, at least not too far over 7200. and as far as max blower rpm, while i won't say i never run the car to redline, i don't do it too often to the point where i could justify myself getting a SLIGHTLY smaller pulley. i wouldn't mind a 2.6 to be honest, but again, only if i'm not maxing out the blower before 6800 engine rpm.
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Originally Posted by JimHarr18
(Post 4197376)
i was most likely going to stick with the stock fuel rail rather than go with a return system. i currently have 60's in my car, but upgrading to 79's or 80's did cross my mind, but really only if i needed to. i do not know my idc's, but on the stock m62 i have a 2.75, redline is at 7k, and my tune is not aggressive at all.
Originally Posted by scott allen
(Post 4197377)
mine was only making 18 also,so instead of spinning the crap out of it i just pulleyed down.
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i shift around 7100 to 7200.
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Originally Posted by scott allen
(Post 4197390)
i shift around 7100 to 7200.
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Originally Posted by TVS Cobalt
(Post 4197368)
Very properly put sir;) My car on the 3.1" was only making 18psi at 6800........ Boost in my opinion is insignificant as there are too many different factors for each set-up to make a generalized statement like the original post
Well, added the stock header/dp for clarification just now, but it has always said w/ 2.5" exhaust |
Originally Posted by TVS Cobalt
(Post 4197392)
From what I gather is sounds like you need a better tune then
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Originally Posted by scott allen
(Post 4197394)
thats just were i shift at i dont want to hurt the moter.
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i know whats up with that 290 aint much for my mods,it was on a mustang dyno but damn. that was on the stock pulley and no meth i just added all that.
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the TVS is the stet-up I'm looking at getting. My question is, will the stage 3 pcm be safe to run with the TVS?
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No. A custom tune is needed, the stage tune would only be a limp until you get to the performance shop for a real tune. And a very short limp too
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Originally Posted by WickedSS2005
(Post 4197454)
No. A custom tune is needed, the stage tune would only be a limp until you get to the performance shop for a real tune. And a very short limp too
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Originally Posted by TVS Cobalt
(Post 4197457)
The stage 3 pcm is locked........
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Is a 2.5inch full exhaust suitable? Also, with my mods, what should it get to allow me to run the TVS safely?
Mods: Ijen CAI AeroForce Intercepter Scan (dual) gauges (cobalt ss edition) DC Strut Bar Clutch Masters Stage 3 w/ Flywheel Motor mounts Corsa Touring Exhaust JEX spark plugs JBP Polyurethane Control Arm Bushings LSJ Polyurethane Transaxle Mounts Progress Rear Sway Bar Innovative LC-1 Wideband Controller (DB-Blue Gauge) Nokya Headlights & Foglights GM Stage 2 w/stage 3 pulley & stage 3 pcm Vibrant Long-Tube Headers w/dp Quick Time Cut Out |
def gonna do this
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Harryresh, I'm only about 3 hours from you if you wanna do the Harrop set up. I know tuning and all for the Harrop.
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i wonder what it would be like to run a 2.5" pulley on the tvs..lol. Of course having the mods to support it so the car doesnt blow up.
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