Hello everyone , i ordered a 50mm but the stupid shop sent me a 52mm. Now i live faraway from the US so sending the stuff back is not a wise move, im thinking of putting on the 52mm. This is for a circuit racing engines. B18c5 Specs are as follow :

1) 13.2 cr with Wiseco pistons and Eagle H beam rod
2) JUN 4 cams with all JUN valvetrain
3) DC titanium race header
4) Motec m4 pro
5) Custom straight cut close ratio gearbox
6) RC 370cc injectors (85% duty cycle)
7) PNP head

So what happens if a put the 52mm on the engine ? Powerband wise ? I dont want the peak power to higher than 8500 rpm if possible. Please share with me for those who have experince . And also i ordered the 440cc injectors which the seller didnt send , 440cc will it be enough with the TWM ?THX a lot

 

engine size?

 

1.8 oversize 0,5.......

 

bump ,need info plz

 

http://www.jenvey.co.uk/~Tech_QA.htm

thats jenveys sizing guide.
m.

 

on those jenvey website, you should run 48mm wich is suitable for your 276hp motor

 

bump for more info

 

I think they will be way too big.

I run 48mm's on my motor and it put down 268 whp actual on the dyno.. 255 correcetd sae..

Mine is a big bore gsr/itr setup 85mmbore 87,2 stroke..

 

So u think i should change the 52 to a 50 ?Sending the stuff back will be expensive and i dont want to deal with the company again. What brand are u running ?

 

I run Jenveys.. Try to sell yours locally firts then get new one's.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tbone &raquo;</TD></TR><TR><TD CLASS="quote">I think they will be way too big.

I run 48mm's on my motor and it put down 268 whp actual on the dyno.. 255 correcetd sae..

Mine is a big bore gsr/itr setup 85mmbore 87,2 stroke..</TD></TR></TABLE>It's 48mm at the plate isn't it?

 

No one here wants to buy the TWM, what if i put a plenum and filter ? or make a restrictor just like F3 engines. Oh well i will just put it on and dyno it and see what happen , i already bought it anyways....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by carboy_honda &raquo;</TD></TR><TR><TD CLASS="quote">No one here wants to buy the TWM, what if i put a plenum and filter ? or make a restrictor just like F3 engines. Oh well i will just put it on and dyno it and see what happen , i already bought it anyways....</TD></TR></TABLE>
i think plenum or air filter was not a choice for compensating the throtle size, because throtle size was effecting the runner crossection area that determine the air speed to create torque at certain rpm/powerband, and plenum was not the part of runner crossection area, the area outside the TWM velocity stacks was the second degree of freedom in the IR system.
btw good luck with the dyno, hope you will gain much whp with your ITB