New Dart heads ported/hand finished/coated GP

[bob@pm-fl.com]

We just did the first Dart heads dyno. We're happy to say that they made great power, here is what we started with, a customer NOTMEE on the corvette forum:
1999 c5 corvette 107,000 miles
Tpis long tubes with random cats and x pipe Corsa pace car cat-back
21CMC 220/226 568 on 114 cam, Ls6 intake, Halltech stinger.

Before install 358.3 rwhp 340.6 rwtq corrected
Dart stage 3 ls1 heads 404.1 rwhp 376.8 rwtq corrected
Dyno graph: http://homepage.mac.com/crash1/.Pictures/Photo%20A lbum%20Pictures/2006-01-13%2018.30.22%20-0800/Image-9976AC7484A511DA.jpg

Almost 50 rwhp gain. The cam is small, and a larger cam should show larger gains.

[bob@pm-fl.com]

Complete Specs:

Your choice of 205 or 225 CC Runner Dart LS1 new casting heads.
(We all know my preference but we still can offer for those wanting 205's)
Completely assembled and ready to bolt on with the best parts and coatings
available, there are no shortcuts taken with these heads. We have made them with the finest quality products because we like to ensure our customers have both performance and longevity.

Valves: They come with brand new 1 piece stainless Ferrea 2.02" or 2.05"
Intake valves and 1.60" Ferrea exhaust valves.

Springs: They will also come with your choice of brand new springs from both
popular spring companies, the Comp Cam 918 beehive springs (recommended for up to .600" lift) or the Crane Cams Dual springs, 144832 good to .650 lift.
There is no cost difference between the two, and both will come with new
Titanium retainers and new hardened locks. These are secured in place by
new ID Locators, which keep the spring in place and prevent it from moving
around, ensuring good high RPM performance.

Machining: They are given a full competition 3 angle valve job, lapped
valves and tested for combustion chamber and runner volumes. These specs
will be provided with the heads, as well as a flow sheet showing intake and
exhaust flow numbers.

Hand work/finishing: All intake and exhaust runners will be completely hand ported and finished to provide for better airflow and performance. This includes blending the bowl into the short side radius, and the entire runner as well.

Coatings: All combustion chambers and valve faces receive our thermal
barrier ceramic coating which prevents detonation, keeps coolant and oil
temperatures down. This also makes more horsepower by keeping the heat
where it belongs, in the chamber pushing down on that piston. These
coatings are permanent and have been in use for years on many forum
customers corvettes and GTO's, and we have been having exceptional results because of them. These alone cost about $300 if you went to have it done seperately.

Final Assembly: They come shipped to your door ready to bolt up, all you
have to do is put your rocker arms on. We have already machined a newly
clearanced rocker arm bar so you only need to put your rocker arms on. We
do request that you send us back your original rocker arm bars so we may
continue to supply them machined for future customers.

Costs: $1,749, ready to bolt up.
We also offer a gasket and bolt package that for $99, includes new head gaskets and bolts. Includes free shipping of the entire package to your door (heads and gaskets/bolts).

[bob@pm-fl.com]

Pics!

Stock as they were before we worked them over:
http://vette-hid.com/images/stockdart.gif
After porting/hand finishing and coatings:
http://vette-hid.com/images/s3dart.gif

[bob@pm-fl.com]

Flow data:
http://forums.corvetteforum.com/attachment.php?att achmentid=47587502

[1bdindn]

Which heads were used on the Corvette? 205 or 225. What size chamber and what was the final CR. Thanks, the heads and price look very nice.

[Oh4GTO]

Im very interested. I have the same questions as 1bdindn. Also I will eventually do a blower. Will that affect whether ai want to go 205 or 225?

[AlphaEden]

:yumyum: :yumyum: :yumyum: :yumyum: :yumyum:

[GoatChs]

Bob,

What combustion chamber volumes are available?

[Oh4GTO]

Im still waiting. VERY interested in these.

[rin]

I am VERY interested also. How long will this GP be going on? Need to get the taxes done and find out what the refund will be.

[bob@pm-fl.com]

I'll check on sizes available, I believe they are 62CC and 70CC sizes. (For 11.0:1 and 9.3:1, respectively)

The ones used on the vetter were 62CC chambers, 225 runners. His C/R was about 11.0:1.

I'll check on length of time for the special and post back with the answer.

Thanks!
Bob

[bob@pm-fl.com]

Im very interested. I have the same questions as 1bdindn. Also I will eventually do a blower. Will that affect whether ai want to go 205 or 225?

You want the 225 for certain, with that setup. :)

Bob

[Oh4GTO]

You want the 225 for certain, with that setup. :)

Bob
Can I still go with a 62cc chamber. Im just finalizing cuz I am getting a set.

[JS1965]

What did the runner CC end up at,Bob
Those are awesome prices for what your doing...

Just curious because I run a small cam 214-222 559-566 and would think the ported version of the 205 might be the better choice for me...

[Oh4GTO]

Bump for ya.

[Oh4GTO]

I cant believe there are so little posts about this. I was drooling when I saw this.

[Whisky]

When will these be available for shipping. Don't want to get into another gp with a six month wait. Thanks...:)

[jaketuff]

OMG... will be in touch.

[VIPRETR]

Since I never got any info from my PM inquiries, I know your probably swamped with work. You answered a few of my questions already, here are a few more....

1. What is the intake runner volume after hand porting? I know this will be an approximate value since they will all be slightly different.

2. What bore size were the flow numbers achieved on?

3. Was the exhaust flow tested with a pipe? Before and after?

4. Intake flow tested with a radius inlet? Before and after?

5. Is there any increase/decrease in P to V clearance?

6. If you hand finish the chambers, approximately how much material will be removed?

I'm not a flow whore, I just want a true A to B comparison. I'm sure these heads will be a BIG hit, especially with the added value of the coatings. Thanks for your time.

Larry

[GTO1_OHIO]

PMed you.

[rin]

I am in for some 225s and 62cc, just got off the phone with Bob. Great deal on some great heads.

[bob@pm-fl.com]

Thanks guys, I'm responding to all the PM's now. I estimate 2 weeks after I get the orders. :)

Bob

[VIPRETR]

Thanks guys, I'm responding to all the PM's now. I estimate 2 weeks after I get the orders. :)

Bob

Can I PLEASE get an answer to my questions? Post it here, thanks.

[GTO1_OHIO]

Can I PLEASE get an answer to my questions? Post it here, thanks.

My PM wasn't answered either.:(

[jjw3477]

be patient guys i know he is swamped with work for one he is busting his ass finishing up my heads before weeks end so i can put my 403 together.

[VIPRETR]

Well, I know I'm a newbie on this board but I've been trying to get this info from Bob for 3 weeks. I'd like to purchase a set of heads soon, but I'd also like to be able to get ahold of a vendor if I have a problem. I'm about to call it quits on this product in light of the fact that I can't even get simple specifications. If he doesn't want the info posted that's fine, he can PM or e-mail me but I think these are things everyone who is even thinking of purchasing these heads should be asking about. Maybe that's just me. Sorry if this comes off as a rant, I'm just a little frustrated, I got money burning a hole in my pocket :D I wouldn't be so persistent if I didn't think it looked like a great product.

[Oh4GTO]

I met Bob personally and hes a great vendor. Very informative and honest and gave me good recommendations and realistic goals. I know that he is swamped right now. Give him some time.

[jjw3477]

Well, I know I'm a newbie on this board but I've been trying to get this info from Bob for 3 weeks. I'd like to purchase a set of heads soon, but I'd also like to be able to get ahold of a vendor if I have a problem. I'm about to call it quits on this product in light of the fact that I can't even get simple specifications. If he doesn't want the info posted that's fine, he can PM or e-mail me but I think these are things everyone who is even thinking of purchasing these heads should be asking about. Maybe that's just me. Sorry if this comes off as a rant, I'm just a little frustrated, I got money burning a hole in my pocket :D I wouldn't be so persistent if I didn't think it looked like a great product.


you try calling him, here is the tactic try calling him like 3 times in a row by the 2 or 3 try he picks up, usually he leaves it somewhere in the shop and has to get back to it or he finally hears it by then over all the ambient noise.

[AirbusPilot]

I just talked to him!

[Whisky]

The one thing I have learned is to not buy a product unless the item is in stock and ready to ship. If you do, you're just asking for trouble.

Items in stock, ready to ship, I buy.

[jjw3477]

to bad in this game if you wait for something to be in stock that hasnt already been preordered by someone else you will be waiting a long ass time.

[bob@pm-fl.com]

Well, I know I'm a newbie on this board but I've been trying to get this info from Bob for 3 weeks. I'd like to purchase a set of heads soon, but I'd also like to be able to get ahold of a vendor if I have a problem. I'm about to call it quits on this product in light of the fact that I can't even get simple specifications. If he doesn't want the info posted that's fine, he can PM or e-mail me but I think these are things everyone who is even thinking of purchasing these heads should be asking about. Maybe that's just me. Sorry if this comes off as a rant, I'm just a little frustrated, I got money burning a hole in my pocket :D I wouldn't be so persistent if I didn't think it looked like a great product.

Huh... I'm here and I've not heard!

I have been on the phone with customers all day though, so you can call me if you like.

Thanks,
Bob

[bob@pm-fl.com]

Bob,

What combustion chamber volumes are available?


62CC is Dart's size, they have no plans to offer larger. But, we will be opening them up to your custom size, so it will be whatever you choose. I expect the upper limit to be about 70CC's.

Bob

[bob@pm-fl.com]

What did the runner CC end up at,Bob
Those are awesome prices for what your doing...

Just curious because I run a small cam 214-222 559-566 and would think the ported version of the 205 might be the better choice for me...

They came in just about 223-224 CC's, and ended up about 226. I think with the small cam you have it might be better with the ported 205's.

Bob

[bob@pm-fl.com]

Sorry for the wait, I have been swamped with it all. Working on several new sets for customers is very difficult, espically on the first batches.

1. See above.
2. We use a 3.900" (and others, but this test was done with it)
3. No pipe
4. Tested with Radiused inlet, we typically see a 10CFM loss without one. We did not test this without one, it's not normally what we do.
5. No change to P/V Clearances.
6. Negligible amounts of material removed, we use sandpaper rolls and not cutters.

Thanks for your patience. :)

Bob

Since I never got any info from my PM inquiries, I know your probably swamped with work. You answered a few of my questions already, here are a few more....

1. What is the intake runner volume after hand porting? I know this will be an approximate value since they will all be slightly different.

2. What bore size were the flow numbers achieved on?

3. Was the exhaust flow tested with a pipe? Before and after?

4. Intake flow tested with a radius inlet? Before and after?

5. Is there any increase/decrease in P to V clearance?

6. If you hand finish the chambers, approximately how much material will be removed?

I'm not a flow whore, I just want a true A to B comparison. I'm sure these heads will be a BIG hit, especially with the added value of the coatings. Thanks for your time.

Larry

[bob@pm-fl.com]

All PM's answered. :)

Bob

[VIPRETR]

Thank you Bob:turbonaug