anybody have Dart Pro1 200 flow numbers?

68corvette · Post by **68corvette** » Thu Feb 03, 2005 3:40 pm

I ported recently my #291 into water, now my friend offers me 200cc Dart Pro1:s with 2.02"/1.6" valves.
I cant find any flow numbers about them except 264cmf@.5"/28" from their web site.

btw. do you maxracesoftware have more good pics than those two from combustion chamber =)

thanks.

idunno · Post by **idunno** » Thu Feb 03, 2005 3:55 pm

Dart 200 pro I

int ex ex. %
.200 129.2 114 88 %
.300 185.6 145 78 %
.400 229.3 164 71.5 %
.500 261.4 172.2 65.7 %
.600 252.5 174.2 69 %

68corvette · Post by **68corvette** » Thu Feb 03, 2005 4:40 pm

Are those flowed with bowl cleaned or out of the box?

idunno · Post by **idunno** » Thu Feb 03, 2005 5:02 pm

posted by dart out of box

Rick360 · Post by **Rick360** » Thu Feb 03, 2005 7:07 pm

I have a set of Pro-1 215's w/2.05 valves. They flowed about 255 @ .600" with my bench. Not as good as advertised. I expect the 200's would be less than that. Flow numbers never seem to match the advertised ... hmmm.

Rick

shawn · Post by **shawn** » Thu Feb 03, 2005 8:12 pm

I think the spark plug might have fell out during their testing of those. The ones that i have done usually fall in the low 230's out of the box. With a little work you can get them up to the 250 area, but they are not anywhere near that out of the shoot.
shawn

Post by **maxracesoftware** » Thu Feb 03, 2005 9:10 pm

btw. do you maxracesoftware have more good pics than those two from combustion chamber =)

thanks.

the only Pics i have on my WebSite are these

http://www.maxracesoftware.com/Chevy_SB ... mill_3.jpg

http://www.maxracesoftware.com/Dart_SBC ... 2_2002.jpg

http://www.maxracesoftware.com/Dart_SBC ... 2_2002.jpg

http://www.maxracesoftware.com/Dart_SBC ... 2_2002.jpg

these are Flow Test Numbers for the
Dart Pro 1 heads 215CC and 230CC versions
"Out of Box Shape"

Dart Pro 1 Aluminum 215 CC ports
out of box shape as shipped by Dart
2.055 valve on 2.020 seat lapline
1.600 valve on exhaust
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture

Lift----Intake----Exhaust
.200----128.5----115.3
.300----181.3----148.5
.400----226.3----178.4
.450----243.4---------
.500----257.0----192.1
.550----268.1---------
.600----271.2----198.5
.650----262.2---------
.700----266.1----201.1
.750----266.1---------
.800----261.2----203.2
.850----257.2---------
***No-Pipe attached, bare exhaust ports

------------------------------------------

Dart Pro 1 Aluminum 230 CC ports
out of box shape as shipped by Dart
2.080 / 1.600 Manley valves combo
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture

Lift----Intake----Exhaust
.200----123.0-----117.4
.300----179.4-----147.7
.400----223.1-----175.0
.450----241.7----------
.500----257.0-----193.2
.550----269.6----------
.600----278.7-----193.2
.650----270.4----------
.700----267.3-----204.9
.750----268.1----------
.800----265.7-----208.1
***No-Pipe attached, bare exhaust ports

68corvette · Post by **68corvette** » Fri Feb 04, 2005 2:38 am

As many results as benches =)
How do you rank them at list of street aluminums?
As AFR pays all those advertises it has been coming a comparison point to other heads.
Can darts battle against them, or would it be better deal to buy afr:s or canfields etc.

Have you tried these with higher depressions, above 40" or higher?

cboggs · Post by **cboggs** » Fri Feb 04, 2005 10:38 am

I'm sure Larry has more feelings on this but I'll add my $0.02 worth.

I've been working with both the Dart Pro 1's and the AFR's for street
or bracket engines. Out of the box the AFR's are typically better in
flow numbers and workmanship seems to be better but the price
does reflect that.

Both heads seem to level off around the same lift.

Curtis

Post by **maxracesoftware** » Fri Feb 04, 2005 4:13 pm

I'm sure Larry has more feelings on this but I'll add my $0.02 worth.

I've been working with both the Dart Pro 1's and the AFR's for street
or bracket engines. Out of the box the AFR's are typically better in
flow numbers and workmanship seems to be better but the price
does reflect that.

i agree with Curtis ..

if i were trying to use a Cyl Head "out of the box"
i'd just about always go with AFR Heads

but if i were going to Port either of those Heads "all out, max-effort"
i'd always go with the Dart Pro 1 215/230 cc Heads over the AFR's

Rick360 · Post by **Rick360** » Fri Feb 04, 2005 6:14 pm

maxracesoftware wrote:but if i were going to Port either of those Heads "all out, max-effort"
i'd always go with the Dart Pro 1 215/230 cc Heads over the AFR's

What do you like better about the Dart heads for all out porting?

Rick

68corvette · Post by **68corvette** » Sat Feb 05, 2005 4:35 am

I haven't got opportunity to "Finger Bench" afr vs pro1 side by side but i have seen 195cc afrs in my friends carage and when comparing pictures there is clearly seen that afrs are MUCH better finished.

do you think i can get near by blending seats into bowls, blending SSR:s, thinning those bulky liners and straightening & cleaning up runners?
i bet that at least max flow goes straight up, but can i do anything else about low & mid lift flow (below .4") than blend the seats and clean & blend combustion chamber into seat?

Here are few photos i took from my friens heads.. he allready removed sharp edges near the seats.
http://www.sunpoint.net/~pirkonen/Pro1/ ... yLiner.JPG
http://www.sunpoint.net/~pirkonen/Pro1/ ... hamber.JPG
http://www.sunpoint.net/~pirkonen/Pro1/ ... runner.JPG