Ok anyone with experience........

1.925L
85mm piston
12.8 - 13.4 Comp
High flowing b16 alaniz head
skunk 3 cams


should we go with the 50mm twm's or the 52

Im NOT running Jenvey or a Single TB/Manifold setup

so 50 or 52? All motor drag car, power from 7-9k?

recommendations?

 

Im running 52mm TMW on my H22, works great even on the street.

 

50 street car
52 drag car

The 50's will give you a little more mid range

 

is that kinda like how when the intake manifold plenum is bigger, the gains are found more up top? And then when its smaller your acceleration is better and you get more mid-range?

 

yea pretty much

i think even 50mm is big for a strret car but with big cams and some compression id would say go for the 52mm.....

 

yeah, im leaning towards the 52's but I hope its not overkill for my displacement.... not quite a 2.0L

 

With those mods that you'd already have, it should be okay.
And you have room for future upgrade, i say do it


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by towsondragcrx &raquo;</TD></TR><TR><TD CLASS="quote">yeah, im leaning towards the 52's but I hope its not overkill for my displacement.... not quite a 2.0L </TD></TR></TABLE>

 

anyone else have input?

 

50mm is better for your setup. 52mm is more suitable for a B18 or endyn head...depends on V.E.

 

huh.....VE aside ,since its not really a factor here nor can it be accuratly calculated . i see what your what point is but with the mods of this motor he would benifit from 52mm...plus leave him self room to expand (porting ect )
he may sacrififce a bit on the bottom end but that can be made up in other ways

and im not a bigger is better bandwagon jumper ..i belive 50mm is way to big for most street cars IMHO but if the mottor has some compression and a big set of cams can take advantage the amount of air to be drawn in then go for it

 

i think ill rock the 50mm.......... im just too scared the 52 is overkill

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by towsondragcrx &raquo;</TD></TR><TR><TD CLASS="quote">i think ill rock the 50mm.......... im just too scared the 52 is overkill </TD></TR></TABLE>

That's what I would do.. I hate going overkill.. Besides, If you do more to your car later, you could always sell em and get the bigger ones..

 

youll be fine with the 50mm i wouldnt worry about it

 

ok ok so now TWM doesnt have any 50mm in stock and it will be 2-3 weeks before they will have more fully produced..... they have one 52mm left that's not spoken for, should I go for it ? or no.........

 

Are you going to die in the next 2-3 weeks?

Patience

 

you never know

 

52mm = way too big

You may also want to look into different cams, there are definitly a lot out there that will make more power, check oyt some of Tbone's dyno charts. I'm using the new Skunk2 Pro 1 cams. 12.7:1 CR, 85mm bore, 89mm stroke, EXTENSIVE port work, HyTech header, 50mm TWMs.

 

anyone have any dyno/proof of the difference betweenthe 52 andthe 50?

 

lol of coruse not ...this is H-T ..we live to speculate

 

im real curious, if u got a 50 , i know itll flow less than a 52, but arent these things able to flow more tahn the engine can ingest already? i mean if one flows 350cfm and one 320cfm, and the head flows 280cfm will it make a difference which one u put on?

 

i agree ...i always through 50mm was alittle big ..but with the mods i guess its fine ???

 

52mm will kill your engine with beyond too much air flow.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by towsondragcrx &raquo;</TD></TR><TR><TD CLASS="quote">High flowing b16 alaniz head</TD></TR></TABLE>

What did Alaniz say the flow rate of the head is?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by johnzm &raquo;</TD></TR><TR><TD CLASS="quote">i mean if one flows 350cfm and one 320cfm, and the head flows 280cfm will it make a difference which one u put on?</TD></TR></TABLE>

It's an air velocity issue at this point. I'm not even going to try and explain it.

 

ok ok, we're going with the 50's, ill wait 3 weeks

the head flows 280-300 cfm I forget the actual number I have a flowchart printout here somewhere...... im just trying to make as much power as possible.

its so hard with a 1.925 Liter

I have a good bore size @ 85mm but everything is designed for either a 1.8L or a 2.0+ liter..... it's either not enough or too much it seems like! But we're trying to be different here so we'll see how it turns out.