27 replies to this topic

[Yams]

Ram pipes.

 

So according to the Yellow Bible, a decent ram pipe can give decent results, so long as we're looking at a 1/8" radius. All of the airflow diagrams and size references, combined with the performance charts is very helpful, however what i have struggled to find is how this actually impacts the carb. And by that i mean: Are we potentially sucking loads of crap into the throttle body? Some have also noted a change in tone, and that tuning is relatively difficult, and needles etc will have to be changed etc, but although theres a potential power increase, what are the negatives to having a well set up Ram piped carb?

 

I'm sure there will be conflicting opinions on this topic but i need a little more info.

 

Many thanks

[freshairmini]

My understanding is that it moves the torque range up and down the rpm slope depending on the length of the pipe. So you have to have a selection of pipes if your tuner doesn't and be prepared to spend a reasonable amount of time (and money) at a Rolling road to get the setup you're happy with.

 

Your engine spec and current power will tell you whether it will be worth investing this money to gain the possibly small improvement in power.

[Spud_133]

Bolting my on, made 3 brake, to 93 bhp, so quite a difference, for 2 small pieces of alloy. I am using the MED stub stack on twin hif4s

[jaydee]

Its not the ram pipe that sucks crap into the engine, its the air filter.

[Yams]

What about the thought of ram pipes with just filter socks on them? Is that a no-no?

[jaydee]

I use them quite a lot, but two layers socks tend to let dust come through. I'm now trying pipercross stuff, lets see if it gives a better filtration.

You can get the short stubstack that fit inside K&N filters, that solves the dust problem as long as the filter is kept in good conditions.

[freshairmini]

Bolting my on, made 3 brake, to 93 bhp, so quite a difference, for 2 small pieces of alloy. I am using the MED stub stack on twin hif4s

 

Don't confuse the two. Stub stacks are not the same as ram pipes. They are longer and more of a tube, compared to stub stacks that are there to purely provide a smooth flow of air into the carb throat. 

[Yams]

I use them quite a lot, but two layers socks tend to let dust come through. I'm now trying pipercross stuff, lets see if it gives a better filtration.

You can get the short stubstack that fit inside K&N filters, that solves the dust problem as long as the filter is kept in good conditions.

 

I think i'll give a ram pipe with socks a bash, so you think i should layer more than 2 socks onto it?

[RedRallyMini]

I've bought these to put on my twin hs6:

 

 

They're not the kind of filter you would use on a car you use every day, you can look right through them, so they won't filter that good but it's better than nothing, I guess...

 

Here's a picture of my twin hs6 with 2.75" ram pipes (they're not on the car yet...):

 

Edited by RedRallyMini, 10 September 2013 - 02:58 PM.

[Vipernoir]

They'll stop leaves getting in, but not the engine destroying fine particles of dust.

 

Look blinkin' lovely though !!

[RedRallyMini]

They'll stop leaves getting in, but not the engine destroying fine particles of dust.

 

Look blinkin' lovely though !!

 

Thanks , yes, I know they won't stop the fine particles of dust, that's why I said: "They're not the kind of filter you would use on a car you use every day"

Edited by RedRallyMini, 10 September 2013 - 04:09 PM.

[JustSteve]

http://www.chrysler3...s/ramtheory.htm

 

 

There are no downsides to ram induction generally, but you're effectively pressurising the carb in the same way you would with a turbo/super charger. This can mean that the carb cannot suck the fuel out effectively.

[Yams]

http://www.chrysler3...s/ramtheory.htm

 

 

There are no downsides to ram induction generally, but you're effectively pressurising the carb in the same way you would with a turbo/super charger. This can mean that the carb cannot suck the fuel out effectively.

 

Thanks Steve that's a really good article. :)

[Da11yn]

i've fabricated up an adapter that allows a ram pipe to be fitted to my hif44 and then one of the large K&N cone filters to be fitted over the entire ram pipe. This does require a weber box, but as i had this already is a very cheap way of ram inducting and being able to run a proper filter for road use.

 

No idea what difference having the ram on or off make as not done a before and after rolling road.

[Turbo Phil]

Not to be harsh, but those mesh "filters" pictured above will do absolutley nothing other than restrict airflow & most likely cancel out any power increase the ram pipe gave in the first place.

 

Phil.