"freeing up revs" can someone explain what this means please? - Saxperience

1ntense · 7th February 2010, 01:15

Ive heard the term a few times now but dont really know what it means, could someone explain please?

Cheers

Danny

-Alex- · 7th February 2010, 01:17

Standard engine the revs are heavy.
Free'ing them up with breathing mods typically makes them lighter.

Hard to explain really.

Kev_Vtec · 7th February 2010, 01:23

breathing mods and a good exhaust system will make it rev alot more lighter.
aka it will rev faster and rev down better and should make more power.
ive been told free'ing it up to much will sometimes make it slower.
i could be wrong.......

Ashleyp · 7th February 2010, 01:27

Throttle boddies

1ntense · 7th February 2010, 01:34

think I get it, thanks

I think thats the problem with my VTR, revs are too heavy.

Would a centre pipe and back box free up some revs?

Im thinking about this..

http://www.kamracing.co.uk/index.php...roen-saxo.html

or would I also need to de cat it with a 4-2-1 mani to really notice much?

Ashleyp · 7th February 2010, 01:36

a good decatted system would help

however, the 8v engine's torque peaks at 3300rpm, hence why after that it feels sluggish - it simply hasnt got the guts

1ntense · 7th February 2010, 01:41

thanks for the info mate, didnt know that about peaking at 3300rpm.

so its quick lower down the rev range, therefor a 4-1 mani would probably be better for a VTR than a 4-2-1 as the former frees up more revs in the upper rev range?

so I would see much freeing up of revs with just a centre pipe and back box then?

1ntense · 7th February 2010, 01:42

Oh yeah.. I was told by the owner that the previous owner to him had removed the silencer from the middle section?

Not sure what he meant by that?

Ashleyp · 7th February 2010, 01:42

Quote:

Originally Posted by 1ntense

thanks for the info mate, didnt know that about peaking at 3300rpm.

so its quick lower down the rev range, therefor a 4-1 mani would probably be better for a VTR than a 4-2-1 as the former frees up more revs in the upper rev range?

so I would see much freeing up of revs with just a centre pipe and back box then?

a 4-1 mani wont improve it massivly

vtr's lose all grunt towards the top of their rev range

unless your spending a lot on new camshafts to raise the power band, then you'll never see much gain

removing a silencer will just make it louder

1ntense · 7th February 2010, 01:49

it is pretty loud, not that keen on it tbh

I take it a supersprint centre pipe wouldnt make it any quieter, or would it?

Not sure whether I would go to the expense of cams etc as like you said, I would probably just be better planting a VTS engine in it.

could you explain what throttle bodies are/do please?

Ashleyp · 7th February 2010, 01:50

as per other thread of yours, if your not going to declare your mod's id leave it standard

1ntense · 7th February 2010, 01:55

I suppose it makes sense to declare them.

I just feel that insurance companies are mugging us off that much as it is, plus the fact that Im 3rd party fire n theft, so if I smash it they wont pay me a penny, then if I modify the engine, which a theif or arsonist wouldnt know about anyway, they want to charge me more money.

Im more sensible in my old age though so probably would declare to keep things legal etc

Ashleyp · 7th February 2010, 01:56

Quote:

Originally Posted by 1ntense

I suppose it makes sense to declare them.

I just feel that insurance companies are mugging us off that much as it is, plus the fact that Im 3rd party fire n theft, so if I smash it they wont pay me a penny, then if I modify the engine, which a theif or arsonist wouldnt know about anyway, they want to charge me more money.

Im more sensible in my old age though so probably would declare to keep things legal etc

insurance companies arent "mugging you off" nobody forced you to buy the car you did, thats the price they charge therefore thats the price you pay

+ if your old and struggling to insure a vtr then youve got problems lol

1ntense · 7th February 2010, 02:01

Its my opinion that they are, £980 a year for a car thats got a very small chance of getting stolen or going on fire.

You think thats a fair price?

I suppose that you think when you go in HMV and you see a blu ray or playstation game at half price that its a bargain, when it costs pennies to make and HMV themselves have probably got a 2.5% mark up on it anyway.

Look at the bigger picture my friend.

The only problem Ive got is that I was late in passing my driving test. I have now though so happy days

JamesR^m · 7th February 2010, 02:04

Quote:

Originally Posted by Ashleyp

a good decatted system would help

however, the 8v engine's torque peaks at 3300rpm, hence why after that it feels sluggish - it simply hasnt got the guts

So in 1st, 2nd and 3rd gear after 3300rpm it's sluggish? They fly through the gears and don't seem like they get slower to me.

Ashleyp · 7th February 2010, 02:05

Quote:

Originally Posted by Saxo_vtr

So in 1st, 2nd and 3rd gear after 3300rpm it's sluggish? They fly through the gears and don't seem like they get slower to me.

A vtr's not quick, stop dreaming

JamesR^m · 7th February 2010, 02:06

Quote:

Originally Posted by Ashleyp

A vtr's not quick, stop dreaming

Compared with? A zonda isn't quick compared with a veyron

Just saying i don't think they pull any less after 3300rpm

Ashleyp · 7th February 2010, 02:10

Quote:

Originally Posted by 1ntense

Its my opinion that they are, £980 a year for a car thats got a very small chance of getting stolen or going on fire.

You think thats a fair price?

I suppose that you think when you go in HMV and you see a blu ray or playstation game at half price that its a bargain, when it costs pennies to make and HMV themselves have probably got a 2.5% mark up on it anyway.

Look at the bigger picture my friend.

The only problem Ive got is that I was late in passing my driving test. I have now though so happy days

im sorry, but thats how businesses work

if you dont like how they operate dont buy their products.

and dont assume i dont know how they work either.

1ntense · 7th February 2010, 02:10

Depends on your perception of quick.

Compared to what I imagine most people learn to drive in for instance, I doubt anyone could say it wasnt quick compared to that.

Compared to a Skyline/Evo/Scooby, then its not quick in comparison however.

All about perception my friend, I wouldnt class them as slow anyway.

This is a saxo forum and you're dissing saxos lol strange, Im sure you'll say oh no I love VTSs.

I agree though, they tend to pull better lower down the rev range.

Ashleyp · 7th February 2010, 02:14

of course, im comparison to other car's a saxo can be seen as either fast or slow (depending on what you compare it to)

after owning a vtr, i can pass judgement on how they drive, especially in comparison to a vts

rolling road graphs on standard 8v engines do show a decrease in torque towards the peak of the rev limit