Really reworked this h22 intake manifold for an all motor street car build looking for around 250whp. I removed the webbing from the upper plenum and welded in and smoothed out the holes for the iac that goes through the plenum. Removed the butterflies and installed a spacer in its place. removed the divider that separates the longer and Shorter runners to make them one large runner on the lower section and matched them to the spacer. Then ported the runners all the way through. Lots of work done here and very happy with the finished product. What do u guys think.....

Heres a pic collage before and here's the same after followed by various other pictures of it.





This is the baller *** money shot lol......
























Mike

 

Great job. I did one by hand and it was a pain. Looks great and I know it took a lot of time to do and I hope it works for u

 

Wow! Nice work (-;

 

Damn bro, got enough plenum volume? haha looks sick

 

Nice clean work!

 

Lowbudget..... Yes sir I've got a total of about 15 hours I this thing with the welding and all the porting.

Thanks guys for the good words. I take alot of pride in my finished work. The owner will know how it works before I do though. As soon as i get results from him which may be months I'll be sure to post them up in here.


Mike

 

Amazing quality!

 

 

Looks beautiful Mike!

 

nice work !!! looking forward to the results

 

as does ur spacer sir. peter told me "yeah this guy called roskoracing is going to make me a a spacer" he said... i was like what do u mean he is going to make one. " he makes them" i said ok get it and ill match the upper and lower to it. he gave it to me and i was like damn this thing is sweet, i thought it was just going to be some water jetted spacer but its cnc'd goodness.... very nice sir.


mike

 

Great work mike

 

rosko is the man! lol and that manifold looks sweet! might want to get rid of the lower dividers all together later on.

 

Blade.... What do u mean get rid of them all together.... Do like rosko and concave the dividers an inch or so below the sealing surface of the runners section?

Mike

 

I think he means cut them out all the way to the bottom. I am not really convinced yet that it is neccesary to do that, but I could be wrong. I do know that if you want to go that far you will need to do some serious welding to the backside of the plenum.

 

yeh exactly but test this first it does look really good

 

looks like the same thing rosko racing does. but you did it by hand, and almost for free. so kudos to that for saving money :p

 

Mike you my friend are a MACHINE

 

Blade and rosko. ... the bottom end of this thing has already been taken from by deleting the secondaries and opening up the lower, if I lower the runner walls even further into the lower section its just going to lose more. Granted it will make up for it on the top end.... I've become a fan of a little low end retainability over the years Even though it's not mine.

Motox.... I Actually made money. This isn't mine i did it for a guy lol.


Thanks Dave



Mike

 

It is gorgeous.. just flat out beautiful. You sir are a master craftsman.
I know there is some debate about cutting the webbing all the way down and fill-welding the backside. I know this: When I did this to my OEM (along with a spacer), it out performed the EuroR everywhere above 4300 RPMS and held its power very very well up top. I know it seems counter intuitive B/C of the massive plenum volume and short runners, but that is what my results were. My engine is a 95mm stroke though. I DID NOT test a manifold design like yours against either manifold so I guess that means my input is inconclusive. I would love to see the difference in the 2 styles in a non biased test. IF the way you did it is better, then that is nice because it saves folks the trouble of fill welding and flushing our the backside of the manifold.
Even still the craftsmanship is wonderful on this manifold and I cannot imagine a world where the buyer will not be pleased with their investment. I'm sure it was worth every dime.
Good Stuff.

 

Hmmm plenum volume and nicely sized runner(velocity friendly) looks like a good street manifold. Now all you need is duration.


Nice manifold man. H series definitely has an advantage with the stock manifold vs b series stock manifold IMO.

 

that is absolutely beautiful to look at sir. i do you have any flow bench or dyno results to share? thank you.

 

Lookin snazzy! Goodjob man. As always

 

Agree with Blade
Friend recently dynod with a design similar to yours and then again with the plenum part completely ported where there is no division for the runners and he gained a good bit of power that was carried further.

Check the thread in this section titled "more h23a dyno testing by turbogixxer tuning"

Your work looks great though

 

Pm me a price for one of these?