HARROP TVS, What You Need To Know & FAQ
08-15-2009, 05:55 PM
#51
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something else to keep in mind. the tvs does not hit like the m62 on terms of instant torque. think of it like a big turbo. my guess is due to the rotating mass, and air volume moving in there. if you spin it high enough {above 7k} you can see some good power numbers. the power doesn't drop off like the m62 does either.
08-15-2009, 09:57 PM
#52
sorry for not replying...was in the field with the army for the week. As someone already said its the stock 80mm pulley that comes with the tvs. I wanna build the engine before i drop pulley size...thinking about 2.7 or 2.8
08-15-2009, 10:06 PM
#53
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something else to keep in mind. the tvs does not hit like the m62 on terms of instant torque. think of it like a big turbo. my guess is due to the rotating mass, and air volume moving in there. if you spin it high enough {above 7k} you can see some good power numbers. the power doesn't drop off like the m62 does either.
with a 7200 rev limit its making power all the way to redline.. feels strong
08-16-2009, 09:07 AM
#54
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thats a good comparison.. the m62 would kinda "die" in a way after about a 100mph from my experiences..the TVS doesnt want to pull up it seems.. nice wide powerband..and area..what happened to the head studs? lol just read ur sig
with a 7200 rev limit its making power all the way to redline.. feels strong
with a 7200 rev limit its making power all the way to redline.. feels strong
08-16-2009, 03:35 PM
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08-17-2009, 12:12 AM
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it happens sometimes. not a lot though!
there are some gmr cams floating around still. however. with stock lash adjusters. i would not run them. solid lash adjusters are required
there are some gmr cams floating around still. however. with stock lash adjusters. i would not run them. solid lash adjusters are required
this is a little on down the road though
08-17-2009, 05:50 PM
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the smaller base circle. the 272's i ran had a larger base circle and put the adjusters right at max extension so to speak. the gmr's are smaller than those and killed them in 8k miles.
08-18-2009, 05:46 AM
#61
OK, clear.
Now I've heard a trick from a UK guy that you can extend the hydro adjuster range a bit by removing the retaining clip inside. You only have to take care that they will not fall apart during assembly...
Something I will try during winter for my GMR's, otherwise a solid adjuster option.
Now I've heard a trick from a UK guy that you can extend the hydro adjuster range a bit by removing the retaining clip inside. You only have to take care that they will not fall apart during assembly...
Something I will try during winter for my GMR's, otherwise a solid adjuster option.
08-21-2009, 03:10 AM
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Not too familiar with cam specs, but if we took the specs of the GMR cams and had them made from new blanks would this adjuster issue still exist? Basically could we use the lift/duration specs and whatnot still and get a bigger base circle this way? I'd be willing to spend the extra dough for some some Comp cams made from blanks.
08-21-2009, 03:37 AM
#63
Not too familiar with cam specs, but if we took the specs of the GMR cams and had them made from new blanks would this adjuster issue still exist? Basically could we use the lift/duration specs and whatnot still and get a bigger base circle this way? I'd be willing to spend the extra dough for some some Comp cams made from blanks.
(And I have a pair of GMR cams waiting in a box...)
08-21-2009, 02:23 PM
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08-29-2009, 12:22 PM
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hows every1s car running with just 60s, stu mod, h/e, injen cai, 3"dp, and stock catback? im only looking for like 280whp which seems to be like a given on the tvs.
08-29-2009, 04:30 PM
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My first dyno w/ a patched together tune was 290hp/249tq. Mods were airbox mod, 60's, garret h/e, stock header, stock d/p, 2.5" magnaflow catback.
So you should easily hit your 280whp goal drew
So you should easily hit your 280whp goal drew
08-30-2009, 03:55 PM
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08-30-2009, 06:52 PM
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yup cuz i have enough for either one but i wouldnt have alot of money left over after the tvs so if i do, do it i wanna make sure its gonna be 100% better than a ported head.
cuz otherwise i can do ported head and rims :]
cuz otherwise i can do ported head and rims :]
08-30-2009, 07:35 PM
#74
09-09-2009, 03:07 AM
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I have a quick question.
Right now my mods are:
TVS 3.1 pulley
60lb injectors
Stock TB
Intake
OTTP h/e
Hatrickstu mod
Hahn header
ZZP 3" dp
Hahn 3" cat back
I want to now swap out the 3.1 pulley for the 2.75, switch to 79lb injectors, and add meth injection. What kind of numbers can I expect from a change like this. And what meth kits or what variation of meth kits would you recommend?
Also is it possible/worth it to tap the intake manifold instead of the cai for meth to avoid spraying meth through the blower? Would this be better or worse?
Here are my numbers right now:
Also would it be possible to just slap on a 2.9 pulley to my current set up? Would the 60s be able to handle that and could I do it without a retune?
Right now my mods are:
TVS 3.1 pulley
60lb injectors
Stock TB
Intake
OTTP h/e
Hatrickstu mod
Hahn header
ZZP 3" dp
Hahn 3" cat back
I want to now swap out the 3.1 pulley for the 2.75, switch to 79lb injectors, and add meth injection. What kind of numbers can I expect from a change like this. And what meth kits or what variation of meth kits would you recommend?
Also is it possible/worth it to tap the intake manifold instead of the cai for meth to avoid spraying meth through the blower? Would this be better or worse?
Here are my numbers right now:
Also would it be possible to just slap on a 2.9 pulley to my current set up? Would the 60s be able to handle that and could I do it without a retune?