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Old 06-25-2004, 01:41 PM   #1 (permalink)
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Exclamation D16a6 camshaft in a D15b7 head
Ok from previous post that I read from searching, some said that it will, some said only with an adjustable cam gear.

I messed up my a6 head, and need to replace it. I have Exospeed's a6 909 reground cam from the a6 which is fine. If I get a b7 head, will it work, or will I need to buy a cam gear to get it to run?

Thanks,
Brian G.
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Old 06-26-2004, 01:24 AM   #2 (permalink)
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Yes it will work. Yes you will need an adjustable cam gear.


And, dont forget tuning.
Last edited by DOG; 07-01-2004 at 07:40 AM.
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Old 06-26-2004, 04:05 AM   #3 (permalink)
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Quote:
Originally Posted by Hondadog
Yes it will work. Yes you will need an adjustable cam gear.
Okay, i just had another question about the same thing, isn't it possible to place the original D15 cam gear onto the A6 cam so you won't need a adjustable cam gear?

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Old 06-26-2004, 05:17 AM   #4 (permalink)
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you didn't specifiy which block it is, bc if it's the a6 block and crank...no adj cam gear is required(but would be good idea)...the B7 is almost the same head as the a6. It's only if you use the a6 cam in the b7 motor as a whole that the cam needs to be dialed in....the crank sprockets are different between the 2...thus requireing different timing belt teeth
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Old 06-26-2004, 09:08 AM   #5 (permalink)
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My bad. Yes, it is an a6 block. Ok, thats what I needed to know. Thanks guys.

Just wanted to make sure before the b7 head shipped.

I know it is a good idea, and I will get one later, but summer semester kinda screwed my finances for the summer.
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Old 06-26-2004, 11:31 AM   #6 (permalink)
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Originally Posted by turntune
It's only if you use the a6 cam in the b7 motor as a whole that the cam needs to be dialed in....the crank sprockets are different between the 2...thus requireing different timing belt teeth
Incorrect info............

Block deck height is different.
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Old 06-26-2004, 11:43 AM   #7 (permalink)
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alright Mistabone-transzex, I'm confused again. Somehow you know the right answer to every d-series question.

a6 block, crank, p29 pistons, a6 timing belt.
b7 head and rocker arm assembly.
Exospeed 909 a6 camshaft and stock gear.

Will it run fine, or do I need a cam gear?
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Old 06-26-2004, 05:03 PM   #8 (permalink)
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it will be fine, but you'll want a cam gear later to dial in the powerband to your liking.

Remember, I figured out the B7/A6 cam swappage issues almost 6 years ago.
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Old 06-26-2004, 06:07 PM   #9 (permalink)
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my bad mista...was thinking about the b7 head on the a6 block...fergot to include the 3mm or so difference in deck ht between the a6 and b7 blocks....was jus trying to make clear to origional poster that their isn't any special procedure for putting an a6 cam in a b7 head on a a6 block

which brings up a question for mista...I'veseen deck plates from RS Motor Works for the B16 is it feasable to make one for the d15 to run the z1 rods with the b7 pistons?...of course I mean tig welding the deck plate to the block and resleeving the block...with the cost of gx pistons from the dealers here I'm looking at similar cost variations to obtain the same end result...but I was thinking with the deck plate resolving the cam timing issues....it would allow us d15er's to run the aftermarket cams designed for the d16's ...in theory
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Old 06-26-2004, 08:01 PM   #10 (permalink)
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Thanks Transzex. I know you figured it out a while ago. Been on Honda-tech and crx.honda-perf.org for a few years.

Thanks for your contributions to the wealth of knowledge.
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Old 06-27-2004, 01:20 AM   #11 (permalink)
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Quote:
Originally Posted by turntune
my bad mista...was thinking about the b7 head on the a6 block...fergot to include the 3mm or so difference in deck ht between the a6 and b7 blocks....was jus trying to make clear to origional poster that their isn't any special procedure for putting an a6 cam in a b7 head on a a6 block

which brings up a question for mista...I'veseen deck plates from RS Motor Works for the B16 is it feasable to make one for the d15 to run the z1 rods with the b7 pistons?...of course I mean tig welding the deck plate to the block and resleeving the block...with the cost of gx pistons from the dealers here I'm looking at similar cost variations to obtain the same end result...but I was thinking with the deck plate resolving the cam timing issues....it would allow us d15er's to run the aftermarket cams designed for the d16's ...in theory
Why deckplate?????

Honda was way ahead with the D15B and GX motors.

My plan.......

D15B7 with VX rods and 01+ GX slugs. 12.1 compression and 1.62 RS,

BIG Exospeed cam, the rest will be in the tuning.
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Old 06-27-2004, 12:09 PM   #12 (permalink)
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but imagine being able to use d13b or d14a rods....I was thinking more along the lines of find out what deck ht is needed then cutting what I need from another block adding it to a b7 and then sleeving with either d16 sleeves or using aftermarket....possible getting custom rods down the road....
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Old 06-27-2004, 12:51 PM   #13 (permalink)
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Quote:
Originally Posted by transzex
it will be fine, but you'll want a cam gear later to dial in the powerband to your liking.

Remember, I figured out the B7/A6 cam swappage issues almost 6 years ago.
But it is possible to use the D15 original cam gear on the A6 cam? In my thoughts then the 1/2 tooth timing issue should be eliminated.
That saves me at first a adjustable cam gear and some dyno runs... with willl come later in time when there are more modifcations done to the engine.

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Old 06-28-2004, 02:35 AM   #14 (permalink)
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Originally Posted by Honda-Fanatic
But it is possible to use the D15 original cam gear on the A6 cam? In my thoughts then the 1/2 tooth timing issue should be eliminated.
That saves me at first a adjustable cam gear and some dyno runs... with willl come later in time when there are more modifcations done to the engine.

Greetings Honda-Fanatic
1988-1995 all use the same cam gear, check the part numbers, I know I did SIX years ago!!!!!!!
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Old 06-28-2004, 02:37 AM   #15 (permalink)
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Quote:
Originally Posted by turntune
but imagine being able to use d13b or d14a rods....I was thinking more along the lines of find out what deck ht is needed then cutting what I need from another block adding it to a b7 and then sleeving with either d16 sleeves or using aftermarket....possible getting custom rods down the road....
D13/D14 must be used with a HF spec crank due to 42mm rod journals, yet they have the same 137 mm OAL as the D15B/Z1 and D16 rods
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Old 06-28-2004, 04:23 AM   #16 (permalink)
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Originally Posted by transzex
1988-1995 all use the same cam gear, check the part numbers, I know I did SIX years ago!!!!!!!
Then was the information i've got wrong... so the stock gam gears from the D15 and the D16 are identical. Good to know. So the only way to solve the 1/2 tooth timing issue is with an adjustable cam gear? Is it save to drive with the A6 cam without the adjustable gam gear? Does it harm riding with the timing 1/2 tooth off?

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Old 06-28-2004, 12:58 PM   #17 (permalink)
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Quote:
Originally Posted by Honda-Fanatic
Then was the information i've got wrong... so the stock gam gears from the D15 and the D16 are identical. Good to know. So the only way to solve the 1/2 tooth timing issue is with an adjustable cam gear? Is it save to drive with the A6 cam without the adjustable gam gear? Does it harm riding with the timing 1/2 tooth off?

Greetings Honda-Fanatic
advanced it adds to low end power...how I have mine now
retarded it adds top end power....
it's only like 10hp,mista?, but at least it's more than stock
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Old 06-29-2004, 05:09 AM   #18 (permalink)
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1/2 tooth either way, car still drives.

But I know what wins.
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Old 06-29-2004, 11:04 AM   #19 (permalink)
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Alrighty, that will work. The adj cam gear will be on one of the next few paychecks.

Now I know advance on the distributor is moving it towards the firewall. Is it going to be the same way on the stock cam gear? Since this is stickied might as well get all the info up since theres been about 5 posts before mine on this topic.
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Old 06-29-2004, 09:11 PM   #20 (permalink)
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1/2 tooth either way, car still drives.

But I know what wins.
So what wins?
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