Hey, Im new to this forum so i will get to the point. I was wondering if there are any aftermarket parts from say a b18 that would fit in a b20a5?

Any info will help.

 

i think one of the B18 exhaust cams fit with modification, and one of the integra models clutch/fly work, search prelude power

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91prelude_b20a5 &raquo;</TD></TR><TR><TD CLASS="quote">Hey, Im new to this forum so i will get to the point. I was wondering if there are any aftermarket parts from say a b18 that would fit in a b20a5?

Any info will help. </TD></TR></TABLE>

Here might be some helpful info:

Ok so whilst forcing Moto to do my evil bidding late into the night, I measured my USDM 1988 B20A5 intake cam, and my set of JDM B18B cams just to see what max valve lift would be.

B20A5 IN: .3825 inches

JDM B18B IN: .38505 inches
JDM B18B EX: .357 inches
-----------------------------

Just for reference here are the measurements Moto got for the B20A5 he measured, and the USDM B18B he measured:

B20A5 IN: .356 inches

USDM B18B IN: .388 inches
USDM B18B EX: .3485 inches
------------------
and the B21 cams he measured:
IN: .3465 inches
EX: .3815 inches
----------------------------------------------

Now I took a couple pics of my JDM B18B intake cam next to my stock 88 USDM B20A5 intake cam to try and show the lobes. They are kinda crappy so I'll try to take better ones tomorrow. Reason for these was that when I compared the cams originally it looked pretty obvious that the JDM ones had more duration but now I am not so sure...





The best combo to date is the: B20a5 Intake cam and the B21a1 Exhaust cam


Here is the original thread: http://www.preludepower.com/fo...8+cam

You will learn more about your 3rd gen by coming over to http://www.preludepower.com


See you there.

3GP Aftermarket Specialist,
Sean Tydingco

 

Sean you have a funny last name

 

actually a B18B intake cam and B21 exhaust cam is the best "OEM" setup you can have...

 

thanks for the info i will put it to good use. just got the prelude and im gonna have the head rebuilt so i figure why not re build them right the first time.