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How many people would be interested in ported and polished cylinder heads? www.dh-racing.com is going to offer port work for D17's. I just want to know if there would be enough of you interested to get a GB going.

Some of DHracing's cylinder heads hold world records. The the gains have been recorded from 35 whp to 55 whp gains. DHracing has the highest quality port work i have ever seen. goto his website to see his work. Please reply if you would be interested.

Dhracing offers both NA and forced induction port work.

 
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hOW MUCH WOULD IT COST?

 
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I dont know if you could gain 35 whp from something like that on a 1.7L engine. I have absolutely NO experiance in regards to that at all. It just seems like way to much horsepower... what do you realistically think we can gain, as well as how much will it be going for. Obviously if it yields gains above 5 horsepower, I am in.

 
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hmmm... interested...

 
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what does the ported head improve ( and what is head porting?)

 
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porting the head can yield gains higher than adding an intake/header/exhaust combo. DHracing has made 194whp on a B16 with only portwork/intake/exhaust/header. The B16 is only 160 hp at the crank stock. Add an exhaust/header/intake and you might see 160 at the wheels. So that leaves the portwork making 34whp.

The portwork that you would be getting would be the same exact one as me. Dave currently has my head, and i will be taking pitcures of his work either today or tomorrow. My gains will be an example of what all the portwork can do. I plan on running my car at the 5.5 psi that i originally did, so i can dyno prove that the heads are awesome.

Porting the heads consists of making the ports physically larger. The intake ports and the exhaust ports are all made larger, and the head is polished in such a way that the turbulence is minimized, allowing more air to enter the engine. Dave also swirl polishes the valves, yet again increasing the amount of air allowed to enter the cylinders.

DHracing has many world records, and they say it is all thanks to the quality of their portwork. I have seen it first hand many times, and their work is the best my eyes have ever set upon.

 
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I'm interested how much?
I have an extra head and block,Crower is asking me to send my head to develop a cam so we can do a GB on Cams.

 
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would it work on an auto?

 
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i'm in for this one!

 
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yes... it would work on an auto. It works for every kind of head.... vtec, non vtec, etc.

 
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cat, how much is it costing you?

 
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Depending on the downtime, I'd consider it. I can't be without my car for two weeks.

 
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like i said in the other thread... DOWN fo sho.... i hope crower is coming out with a turbo cam as well.. (for the non-vtec)

 
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Realistically on the 1.7 your looking at 15whp best with all the bolt-ons.

Yes other heads gain what they gain but I'm being realistic here.

Better gains would come from a nice size cam.

 
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Have you seen the size of the holes in our heads? They're tiny. I'd bet it'd make a hell of a difference. Besides, people spend the same amount on intakes with less than 5 whp gains.

 
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saying 15 WHP max is a GREAT example of why you bought a freakin dodge... 15 whp my a$s.... i think on our engines, from dh we could expect to see 20-25 whp n/a, and up to 40 whp on FI... you OBVIOUSLY have no idea who this man is, he is a LEGEND!!!!!!!! he has made 35+ hp on a STOCK B16 with his package... you are nuts man, NUTS to say catalyst will only see 15whp... the dyno will show the truth, and i will have mine done before that to beat the rush of bussiness off of this site!

 
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My dirtbike has ported and pollished heads and it has NO low end at all and can,t even pop a wheelie now, and before you couldnt start w/o popping one. Will this make our acceleration less and only make gains in the top end or what?

 
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The port job on your head was a bad port job then. If you overport a head, you will lose all of your bottom end. There is a difference between a FI and NA port job. If you go NA, you dont want a FI port job.

 
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I would be interested, but I would like to see numbers first of coarse. Does the combo inlude new SS valves, valve springs, and retainers? Will he offer oversized valves, and re-shaping of the combustion chamber for more quench area.

 
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how much estimated ?

 
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Mmm, I like the idea of pulling more power out of the engine. Even if it did only produce 10hp, that would be signifcant compared to the gains that we are used to on the D series.

 
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I'm in, want to know price and info on FI package.

 
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Yea, me too. Also i want to know how long it takes?

 
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Again your reasoning is juvenile. What I drive is irrelevant to what YOU think a ported head will make. Turbo's do not resond the same way NA motors will. Your forcing air into the combustion chamber rather than sucking it in.

You also must not know B series motors much. B16 heads flow incredible from the factory. Please lead me to the site where you see 35whp gains from "just" a port alone. IE stock cams, gears etc.

Comparing B16 heads to D17 heads are is apples to oranges. Again your reasoning is flawed

I have seen the honda D17 head and yes the ports are small but there is only so much you can port before you run into the water jackets. Also bigger is not always better, but a port will help no doubt.

You'll gain about 15whp with just a ported head NA, what will wake up the motor is a bigger cam. Thats will be the best mod to date for the car. It takes better advantage of the standard I/H/E.

I'm not trying to sell anyone on ported heads, hell our shop ports all the time. Just telling you 40whp is NOT realistic.

 
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the GB price will be $650, thats $100 off the normal price.

I dont know the gains, i am just saying what he has done in the past. He drives a CRX with a SOHC nonvtec D16 that runs 12's on pump gas. I know that his portwork on Hondas cannot be matched.

He is trying to get a spare head so people wont have any downtime. So until then, you will have to send him your head and he will port and polish it, and swirl polish the valves, then send it back to you. When he gets the spare head, you will pay him the GB price + a core charge, and he will send you the head, and then you just swap heads and send him the stock one. Once he determines that the stock head is a good core, he will refund the core charge.

 
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man... these neon guys need to go somewhere.!!! lol... go to his site for teh B16 DYNO! the man makes the biggest fastest B16s in the world... with throttly body, i/h/e, and his port job on a BONE STOCK engine otherwise, stock cams etc... he made like 195 to the WHEELS... the man is a honda GOD...

 
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Did you forget the apples to oranges comparison?

You my friend are not worthy of the B16

You must make do with the D17

FYI stock cams could mean ITR, CTR etc. They are stock cams also

 
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Im in, how much for Everything!(so if i got in this GB i would need 650 plus however much it costs to ship the head?)
i think i can only come up with 650 i wish it was a little less...And if i send my head without getting a core how much downtime am i looking at.

 
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i'm in! depending of downtime of course..

 
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ok, there will be different stages of portwork available. And i have a core coming in the mail, so you wont have to have a long downtime. The most expensive PnP job will be $850 + core. I dont have prices on the other stages, but i will get them asap. I will be talking to Dave soon, since he wants a ride in my car So i will get back to you guys about the prices ASAP.