A friend of mine is planning on putting a 90 si cam and cam gear on his d15b2 and i was thinking, does it work? it doesn't sound right but hey its his car so whatever. i told him not to do it but hes going " to give it a try " and expletive up his car. so whats the word h-t? will it even work or is he going to end up expletive up is head?

 

Yeah the si cam works with the d15b2, Would have to do valve lash with d16a6 specs.

 

how much of a difference does it make, because my buddy says it will have a 5-7 hp gain plus the cam gear?

 

nothin you will feel d15b2 is the weakest engine in the honda stable

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stoich &raquo;</TD></TR><TR><TD CLASS="quote">nothin you will feel d15b2 is the weakest engine in the honda stable </TD></TR></TABLE>

88-91 DX D15B2 = 92hp

88-91 STD D15B1 = 70hp
88-89 HF D15B6 = 62hp
90-91 HF D15B6 = 70hp

 

Si and DX camshafts have same lift on intake valves
Si and DX with manual transmission camshafts have same lift on exhaust valves
DX with automatic camshafts have higher lift on exhaust valves than Si or DX manual

valve clearances are the same on Si and DX

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">Si and DX camshafts have same lift on intake valves
Si and DX with manual transmission camshafts have same lift on exhaust valves
DX with automatic camshafts have higher lift on exhaust valves than Si or DX manual

valve clearances are the same on Si and DX</TD></TR></TABLE>


Do you have any links to show this? I find it interesting and would like it read it with my own eyes.

To the original poster it will work fine, if the cam gear is the SI cam gear I wouldn't even bother, it is the same cam gear as the D15b2 uses. Also you will be off about a half a tooth after the install. You need to use (i believe) D16Y8 cam gear to have perfect timing. But make sure you research that first I am just going off of memory from what I have read in other posts.

 

I wouldn't expect to see any gains if he still has the ole faithful dpfi, now if he swapped mpfi.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Floored &raquo;</TD></TR><TR><TD CLASS="quote">Do you have any links to show this? I find it interesting and would like it read it with my own eyes. </TD></TR></TABLE>

this is from 91 USDM CRX factory manual - please note that in this 1991 manual, in the specs section, Honda didn't call a CRX DX a 'DX', they called it STD - everything is listed as STD, HF or Si

 

nice post

 

i know this is old but that kid got owned trying to say " i wanna see it with my own eyes.." haha

 

Way to revive a 3 year old topic...

 

If you did the vtec si cam,you would need the ecu,wiring harness and some other stuff.
If he did just the a6 cam and y7/y8 gear thats all you would need.
just a simple swap.

 

he just needed some recognition for schoolin that kid! lol

 

would u need to change the timing belt when you do the swap?

 

You dont have to,but you probly should anyway.

And it depends on when the last time it was change.They should be changed every 100,000 and then every 30-50,000 after that.

 

Hate to revive a dead post twice but I came across this in a search.

In case any one think jus slapping in a vtec cam will work cuz ^^^this guy said it only needs "a few things" PLEASE DON'T!!! Simply adding a cam won't work without the head, Unless ur gonna jus tape the solenoid to the side of the head and hope it works

BTW... a whole harness for jus adding Vtec??? Come on now... thats how people end up buyin shyt they don't need... WTG Dan!

 

to really be able to see/feel some results doing the head swap,ecu,and the tranny is a good idea.its a nice upgrade.

 

the a6 is a NON vtak cam.
you just need the cam,the y7/y8 gear adjusts the tooth difference. then valve lash and bam,accompanys mpfi nicely.

and duh you need a vtec head for a vtec swap.

 

you guys that doubt the automatic cam think about it its all common sence an automatic car uses about 50 more pounds in the tranny which needs more power to get the car moving i bought a 4 door ef with 280 thousand miles on it converted it to stick with 4 speed tranny stage 1 exedy clutch pressure plate and flywheel and ive beat my friends ej1 and and a stock ek with stock y7 just he had exhaust and intake, my cars just dumped with a clutch dont forget i got granny gears and ive beat a ej1 with intake headers and it was open headers although he beat me on the freeway and i beat all my friends dualports dont forget im still dualport and my iacv is malfunctioning so i idle at like 200 and like 100 with my fpr hose plugged in my **** digs