I dont have a vtec head, my A6 nonvtec head flows almost as well as a Z6 if not as well. Like I said stock turbo motors there is only so much power you can make and a couple psi is much cheaper than a vtec head swap. The swap costs more than everyone thinks. Head $150 Gasket set $50 Timing belt $30 It starts to add up. Before doing a vtec head swap anyone with a nonvtec motor should get a vtec motor tranny. Such as the Y8 or Z6, or for B series guys GSR or B16 trannies. I have a Y8 tranny and it made my car so much faster without making it more prone to blow up, thats what we're all looking for anyways right?

 

My bad for assuming you had a vtec head. Shows how much I know about singles

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sportinemotions &raquo;</TD></TR><TR><TD CLASS="quote">i have a turbo dx right now, simple question.... how much of a benifit would it be to do a mini-me head swap? i have the head laying around it's almost brand new.(new valve job) i just dont know if its worth the $50 headgasket and the 3 hours outa my day.
the head is off of a d15b. </TD></TR></TABLE>

You wouldnt benifit at all, you would only have a MILLION tunning issues. You are SOHC so id stay nonvtec. The D15/d16a6 heads are the best head in the SOHC family. They flow the best and make more power. Bisimoto w/ the worlds fastest SOHC used to hold the record w/ a nonvtec head(d15) and still does but w/ a differnt series engine. Ask Wil at exospeed, he'll tell you too.

If you had Bseries id say go w/ a Vtec head because they flow so much better. But you have a SOHC so i'm saying stay nonvtec head.

 

like i said earlier i already have a vtec head on there so i guess the question that i should have asked would be this, is it worth the $50 headgasket to trade a z6 head with 100k on it with bad valve stem seals, for a d15b head that just had a head job done on it with 40k to begin with. don't ask why i had the head redone lol its a long story the reason im askin is because the cam in the d15b head is a little better and its pretty much all brand new again.

the other question i now have is why would a non-vtec head be better that the vtec with a turbo. when the high lift lobes kick in then you're getting more flow. therfor making more flow to the turbo and allowing more air in. I'm not understanding how this would not be the right thing to do. when i first did the head swap, i had NO tuning issues. Why would there be any? There is nothing to tune.

 

hell yeah it's worth it.
if only just to fix the valvestem seals.
but that d15b cam is really good too.

a non-vtec head is not better than a vtec head for turbo, whoever told you that doesn't know what they're talkin about.

it was mentioned previously that you could gain the same power by just upping it a few PSI compared to adding vtec to an otherwise non-vtec platform.

but the only vtec heads that might be worse for turbo might be a REALLY aggressive one with gnarly n/a cams, like a typeR head.
theres alot of overlap aggressive n/a cams,
overlap lets the boost fly right thru the cylinders without getting compressed.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM S1eeper &raquo;</TD></TR><TR><TD CLASS="quote">

You wouldnt benifit at all, you would only have a MILLION tunning issues. You are SOHC so id stay nonvtec. The D15/d16a6 heads are the best head in the SOHC family. They flow the best and make more power. </TD></TR></TABLE>

thats were i got that idea
another question i got is a y8 or d15b head better on a y7 for boost

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sportinemotions &raquo;</TD></TR><TR><TD CLASS="quote">thats were i got that idea
another question i got is a y8 or d15b head better on a y7 for boost</TD></TR></TABLE>

I would suggest whichever bumps your compression higher, honestly. Yeah, higher compression makes high boost more risky without the proper tuning, but for a mild street setup it'll help more than hurt things.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM S1eeper &raquo;</TD></TR><TR><TD CLASS="quote">

You wouldnt benifit at all, you would only have a MILLION tunning issues. You are SOHC so id stay nonvtec. The D15/d16a6 heads are the best head in the SOHC family. They flow the best and make more power. Bisimoto w/ the worlds fastest SOHC used to hold the record w/ a nonvtec head(d15) and still does but w/ a differnt series engine. Ask Wil at exospeed, he'll tell you too.

If you had Bseries id say go w/ a Vtec head because they flow so much better. But you have a SOHC so i'm saying stay nonvtec head. </TD></TR></TABLE>

Bisi's head is obviously not nearly stock. Stock vs. stock the SOHC VTEC head will flow better. It has a higher lift cam. Duh.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tad &raquo;</TD></TR><TR><TD CLASS="quote">yeh, well it's a dseries block the same as any other.

pretty sure it's just as tough as a d16 for example,
it's only a 1.5 cuz the crank is different, the rodlength and bore and suhc are all the same.

but yeh... around 180-200 at the wheels is about all i'd push</TD></TR></TABLE>

Actually D15 rods are weaker than D16 rods.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM S1eeper &raquo;</TD></TR><TR><TD CLASS="quote">
You wouldnt benifit at all, you would only have a MILLION tunning issues. </TD></TR></TABLE>

?

I guess I got *really* lucky when I had exactly *zero* issues with my vtec swap.

To the guy who started the thread, does your current engine management handle vtec engagement? If so, then sheesh! Slap the head on there and be done with it! And 3 hours? Are you stopping for a smoke and pancake?

 

i have an fmu so vtec works, well i really dont have a choice in changing head out now lol, started it up and let it idle till it warmed up then i noticed the head gasket was blown, had the head off 2 times and the block out once ,im so tired of workin on this damn car.

ive done 2 mini me swap and never had a truning issue, do you guys mean with EMS you have tuning issue's ?

anyone know how much more power a d15b head w/ a y7 setup will hold as opposed to a d15b w/ a b7 ? i know it should be a good bit more because rods are better and the little bit of difference in displacement

btw im using a paper gasket with next swap b/c i have had no luck with felpro Multi Layer Steel




Modified by sportinemotions at 5:43 PM 11/19/2004

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">Actually D15 rods are weaker than D16 rods.</TD></TR></TABLE>

well I would like to see d15b vtec rods next to some d16z6 rods.

I can believe b7 and b8 and such rods would be different,

but the d15b and z6 share the same rodlength.. i'd be suprized if the rods weren't practically identical.

BUT I haven't seen em so can't say 4 sure.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sportinemotions &raquo;</TD></TR><TR><TD CLASS="quote">

btw im using a paper gasket with next swap b/c i have had no luck with felpro Multi Layer Steel
Modified by sportinemotions at 5:43 PM 11/19/2004</TD></TR></TABLE>

maybe the gasket mating surfaces on the block/head are warped/damaged,
get them resurfaced, if you can't get the block to a machine shop then at least do the head's surface.

 

dont run a y7 block....they are shitty stock...i did a motor swap and threw in the turbo boosting 5 psi with an fmu.....the d16y7 came right out my friends car the same day and the car was driven to the place where we did the swap....nothing previously wrong with the motor....only had 55,000 miles on it....on the way home i started hearing rod knock....and i wasnt even ripping it....i got as far as i could, about 4 miles after the rod knock started the block detonated into tiny pieces that i felt hit my fire wall....oil everywhere....i threw my #2 rod....busted through the front and back of the block and the bearing was smashed into my oil pan....those blocks are shitty.....just my personal expierience....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondaddiction808 &raquo;</TD></TR><TR><TD CLASS="quote">dont run a y7 block....they are shitty stock...i did a motor swap and threw in the turbo boosting 5 psi with an fmu.....the d16y7 came right out my friends car the same day and the car was driven to the place where we did the swap....nothing previously wrong with the motor....only had 55,000 miles on it....on the way home i started hearing rod knock....and i wasnt even ripping it....i got as far as i could, about 4 miles after the rod knock started the block detonated into tiny pieces that i felt hit my fire wall....oil everywhere....i threw my #2 rod....busted through the front and back of the block and the bearing was smashed into my oil pan....those blocks are shitty.....just my personal expierience....</TD></TR></TABLE>


I wouldn't blame the block for that.. but still

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sportinemotions &raquo;</TD></TR><TR><TD CLASS="quote">
btw im using a paper gasket with next swap b/c i have had no luck with felpro Multi Layer Steel
</TD></TR></TABLE>

You are going to use a paper gasket over the multi layer steel?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tad &raquo;</TD></TR><TR><TD CLASS="quote">well I would like to see d15b vtec rods next to some d16z6 rods.

I can believe b7 and b8 and such rods would be different,

but the d15b and z6 share the same rodlength.. i'd be suprized if the rods weren't practically identical.</TD></TR></TABLE>

Actually the JDM D15 rods might be the same. I was referring to the regular D15 vs. D16.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sportinemotions &raquo;</TD></TR><TR><TD CLASS="quote">

btw im using a paper gasket with next swap b/c i have had no luck with felpro Multi Layer Steel
Modified by sportinemotions at 5:43 PM 11/19/2004</TD></TR></TABLE>

Exactly what kind of problems did you have with them that you wouldn't expect with paper gaskets?

 

are the y7 blocks really that shitty because i was going to get that one off of tgreaves W. his has 8k miles on it. well i dont need a gasket anymore becuase some how my block got striped out so i need an engine now, and a y7 running 6 lbs of boost should last a while. will a p28 run a stock y7 or should i put my d15b head on it ? or should i get a computer thats for a y7 ?

 

Put whatever head you want on it, stock block it's not going to make a difference because the limiting power factor isn't the head it's the block. The P28, unless chipped, will try to turn vtec on and is going to throw a code if the engine/head doesn't have all the sensors the ecu is looking for. You should be running Uberdata anyway, get on that.

 

man i got so much going on right now that was a stupid question askin will a p28 work on y7 lol, i had a brain fart.

 

im just going to use my stock dx ecu for the 1.5 until i feel like changing another head. then i will throw the d15b head on it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sportinemotions &raquo;</TD></TR><TR><TD CLASS="quote">are the y7 blocks really that shitty because i was going to get that one off of tgreaves?</TD></TR></TABLE>

Been boosting for more than 2 years and 25,000 miles @ 7 - 9 psi on a y7 block and y8 head. That ain't too shabby.

A friend of turbo'd his b16 with 40,000 miles on it. It blew in 800 miles. Does that mean that B series blocks are crap too?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">

Bisi's head is obviously not nearly stock. Stock vs. stock the SOHC VTEC head will flow better. It has a higher lift cam. Duh.</TD></TR></TABLE>

stock for stock this is true. just in terms of a modded heads. sorry

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fsp31 &raquo;</TD></TR><TR><TD CLASS="quote">

Been boosting for more than 2 years and 25,000 miles @ 7 - 9 psi on a y7 block and y8 head. That ain't too shabby.

A friend of turbo'd his b16 with 40,000 miles on it. It blew in 800 miles. Does that mean that B series blocks are crap too? </TD></TR></TABLE>

what kinda EMS do you have ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tad &raquo;</TD></TR><TR><TD CLASS="quote">


I wouldn't blame the block for that.. but still </TD></TR></TABLE>
I concur

yeah maybe the tuner was shitty ???? probly had some timing issues that led to detonation, and if you heard knock STOP the engine lol dont drive it as far as you could

 

I have a question for you..... I have a d16y8 with a crower stage 2 cam with springs/retainers, tuned with obd1 conversion and also have a jdm d15b tranny. My times on the track before were mid 15's and now I'm at high 15's with this tranny swap. My other tranny blew so this one had to do. Do any of you think this tranny is slowing me down. I've dyno'd at 160whp all NA. And when I hit mid 15's my head was stock with a obd2. Any suggestions? Sorry if I am hi-jacking, just curious....Just not sure of possible restrictions...





Modified by HyptCvc_ at 9:20 AM 11/21/2004