Pictures of ported intakes before and after....so far.. [/URL][/IMG] [/URL][/IMG] [/URL][/IMG] [/URL][/IMG] [/URL][/IMG][/URL][/IMG]
Exhaust ports before and after...so far.... [/URL][/IMG] [/URL][/IMG] [/URL][/IMG] [/URL][/IMG] [/URL][/IMG] [/URL][/IMG]
They flowed at best 260int/180exhaust @.600 so far. I plan to have them dropped off tomorrow to get there final numbers since I have finished all the ports. We'll see what they do.
As far as Iron heads go... As far as iron heads go, you will be hard pressed to find ANY small block iron head other a Buick 350 that can be ported to flow the numbers they can.:shock: 2 hp per cfm is a reasonable HP number with the right combination. Who's ready??? It seems most just want to jump over to a 455.
How does this porting compare against our friend in NY who was flirting with 290 on the intake side? He said he was pretty much topped out, but what more was he doing than you or are we looking more at a difference in benches? BTW, what valves are you using? You guys are right, I can't think of any production small-block heads that can be ported this easily to produce these kinds of numbers. Heck, a lot of small-block Ford heads are a challenge to get over 200 on the intake. Its amazing they are as fast as they are. I'll be happy to send you a set of SBB heads you can "practice on" for me! Good Luck, Mike T.
The plan is to flow a stock head for reference to show a comparison between stock and ported on the same bench. This way if you can see the gain from stock. You can then take the "gain" number and compare it against the gain from another bench flowing stock vs ported. If the gain is the same, the heads should perform and offer the same HP/power increase. It then wont matter if one bench shows 20 cfm better if it is shows stock at 20 cfm better. It's not a perfect plan but it should help if things get controversial.:Smarty:
Depends on who you know. I get my heads done pretty cheep at $40-60 for a pair of ports but it can get pricy quick if you have to play around with a head for a while trying to find the airflow. YOu can kill numbers:blast: faster than you can find them if you are not careful.:rant:
Thanks for the pics Rick! Now I know why you said that port matching wouldn't help much....Not compared to a FULL ON port job hahahaha!!! Great job. Just curious Rick did you reference the march 06 Musclecar Enthuiast article by Jim B? I can scan the how to port Buick 350 heads article if anyone missed it.
Re: As far as Iron heads go... Wanna bet. I have a pair of Grumpy Jenkins irons that will knock your socks off.:bglasses:
I would really love to have a copy of that article. Could you email it to me? George Kelley email is gkelley@ail-us.com Thanks george
Bottom line is the SSB head is a good design when compared to other brand's stock castings and Rick has done a really nice job getting the numbers out of them. When I took them to get flowed at Sloan's Engines on his SF-600, he was very impressed. Tim does a lot of work on Stock Eliminator and Top Stock cars, if fact the IHRA tech man was there inspecting a couple of LS1 heads for competition certification. They both were shocked at the numbers we got. Once we get the numbers we are looking for and the repeatability from port to port, we have five more sets of stock heads waiting for the transformation.
THe only reason these have a "port match" is because I got them that way. Normally I would just raise the roof and move the pushrod hump over. Most of the work it in the bowl area and the casting is smoothed out so it looks "fully-ported". I missed that article, it would be interesting to read. :TU:
Here is an update of our heads that Rick's been working on. The numbers below have been confirmed on two flow benchs Stock Flow, stock valve... intake .050 - 27 .100 - 55 .200 - 112 .300 - 165 .400 - 199 .500 - 196 .600 - 199 exhaust .050 - 22 .100 - 44 .200 - 87 .300 - 119 .400 - 137 .500 - 146 .600 - 149 Ported, 1.92/1.55 vlaves Intake .050 - 32 .100 - 60 .200 - 116 .300 - 172 .400 - 215 .500 - 247 .600 - 262 exhaust .050 - 27 .100 - 53 .200 - 102 .300 - 145 .400 - 175 .500 - 177 .600 - 182 Rick have gotten 190 on the exhaust by laying back the short turn more but it cost him a ton from .100-.500. losing as much as 25 cfm at .400.