removing 20v ram tubes

corollamadness · Post by **corollamadness** » Wed Jul 28, 2004 3:11 am

I noticed when i opened my silvertop 20v throttle body up to be cleaned that there were some plastic ram tubes inside it and was wondering if anyone on these forums has removed them or had some better ones made up for the 20v.

I heard that removing them will give gains in top end power but im going to take them out and see what it is like.

RAZA · Post by **RAZA** » Wed Jul 28, 2004 7:43 am

people have removed them but I wouldn't
they are a particular length and shape to maximise power and torque through the rev range and any gains at the top will be ruined by loss at other points in the range.
There were some aftermarket ones for sale in the parts section over the last week or two I think - have a look there anyway

Post by **Mr Revhead** » Wed Jul 28, 2004 10:37 am

dont remove them, they help torque, and thats one area in the 20v where you need more, not less. so unless youve done a heap of mods that will suit removing them leave them in place

corollamadness · Post by **corollamadness** » Wed Jul 28, 2004 2:33 pm

Hmmm its a tuff one but i think i will give it a go and see what results i get. I thought i would be able to get some good info here about them as i have realised Newzealand is swarming with 20vs compared to Australia. Hopefully i get some more responses.

Post by **Mr Revhead** » Wed Jul 28, 2004 2:46 pm

are you on twincam? i just explained why there..
basicly the longer the runner AFTER the butterfly the more top end hp you have the longer the runner BEFORE the butterflys the more low range torque you have, thats rather generaly speaking though.

so as i said before unles youv made modifications that would suit removing them, leave themin place. but no harm in pulling them out and seeing what you think. you wont stuff anything

laserracer · Post by **laserracer** » Wed Jul 28, 2004 4:27 pm

rev head is right i took mine out and when i raced at taupo it just didnt have the grunt out of the slower corners .but unfortunalely i thought i would be smart and cut the flanges off the ram tubes after i had removed them i am now making new alloy ones i can graft back on the flanges
i think i got the specs from redmist. it would probably go all right at puke
because you are so much further up in the rev range

cheers dave

RedMist · Post by **RedMist** » Wed Jul 28, 2004 6:13 pm

There are a tonne of arse dyno reports of getting more power up high. This is total bollocks, your loosing mid range which in turn makes a bigger kick into the upper power band.. it seems faster, especially with the added induction roar, but it's sygnificantly slower.
You want to lookup posts here or on a search engine for Helmholtz (its' the theroy behind intake length tuning)
Dave, nice post! Good to see someone with imperical evidence, a lap time always proves a arse dyno, lip dyno or even a true dyno wrong.

Daniel.

strap-on · Post by **strap-on** » Thu Jul 29, 2004 7:11 pm

ummmmmm.... warrick...... how much will it cost those smart buggers amongst us that cut ours to get new ones?

last time i listen to jimmy

Loudtoy · Post by **Loudtoy** » Thu Jul 29, 2004 7:39 pm

got20v? wrote:ummmmmm.... warrick...... how much will it cost those smart buggers amongst us that cut ours to get new ones?

last time i listen to jimmy

yeah good on ya last time you didn't listen to me you hooked your battery up round the wrong way and fried your ecu :roll:

matt dunn · Post by **matt dunn** » Thu Jul 29, 2004 7:46 pm

I haved a 20V airbox and ram tubes for sale if anyone is interested. No throttle body's just all the stuff that bolts to them.

strap-on · Post by **strap-on** » Thu Jul 29, 2004 8:07 pm

wat model 20v? there are three of em

matt dunn · Post by **matt dunn** » Fri Jul 30, 2004 7:20 pm

got20v? wrote:wat model 20v? there are three of em

it will be silvertop,
but i dont know the difference in the airbox between early silvertop and late silvertop.

AceSniper · Post by **AceSniper** » Sat Jul 31, 2004 9:31 am

all silvertop ones are the same... 2Xblack 2Xredish

Post by **Mr Revhead** » Sat Jul 31, 2004 10:50 am

yup the trumpets are the same for prefacelift and facelift.
shoul dbe no problem to get as many as you want 2nd hand!

matt dunn · Post by **matt dunn** » Sat Jul 31, 2004 12:06 pm

I thought so but he said three models which made me question?

AceSniper · Post by **AceSniper** » Sun Aug 01, 2004 11:20 pm

blacktop ones are rubber

NA Drifter · Post by **NA Drifter** » Mon Aug 02, 2004 1:00 am

what's the different between the facelift and pre facelift silverstop? facelift got bigger trottlebody?.. same size as blacktop trottlebody? how many mm?

Post by **Mr Revhead** » Mon Aug 02, 2004 11:09 am

look:

http://forums.toyspeed.org.nz/viewtopic.php?t=18953

Silvertop · Post by **Silvertop** » Mon Aug 02, 2004 11:22 am

I think Keith was more after differences between non-facelift Silvertop vs facelift Silvertop (if any), rather than Blacktop vs Silvertop (as useful as that thread is!).

Post by **Mr Revhead** » Mon Aug 02, 2004 11:27 am

oh yeah sorry .. me read to fast at times :oops:

...
the differences are the shape of the butterflys and inlet tract form the butterflys to head. the in not sure of the overall size difference but the later one is a bigger surface area i believe, i think the diameter is the same though, blacktop ones are larger. i think redmist has the exact info as hes got most of those bits scattered amoungst his racers!