Promaxx Project X 200cc Head Review With Real Flow Numbers

[@blackdragster1]

Eric, thanks for an outstanding review. You have done more to educate engine enthusiasts in a few years than magazines have done in 30 years. I can hardly wait for your dyno testing series!

[@WeingartnerRacing]

Its to bad I don't have my own show on some fancy app.

[@zAvAvAz]

what an awesome idea!@@WeingartnerRacing

[@jameschavez1679]

Don't worry about asking people to like and subscribe! We need to get more people watching your videos you're wealth of knowledge.

[@WeingartnerRacing]

I wish they would.

[@jameschavez1679]

@@WeingartnerRacing hey I have a question. I'm doing a DOD delete on my 5.3 LS I was going to send the 243 heads and have them freshed up at a local shop but I was offered 806 heads for $50 should I consider the 806 in place of the 243.

[@paulferreira1603]

Amateur head porter here. Would be interested in a video of actual Hp gains and if possible ET gains at the track. I think it would make a great video that would really showcase all the hard work that goes into this !

[@WeingartnerRacing]

Maybe I will use a set on the dyno mule.

[@timothybayliss6680]

You hear it on every video because it levels the playing field. I kind of want to see the ProMaxx ls7 heads for 4" bore. They are supported to flow like 370cfm

[@WeingartnerRacing]

I may see them some day.

[@loafbred]

I ALWAYS enjoy your videos. I watch as many of this type of channel as I can find time for, and I don't think I can say that about any of the others. The detail that you go into shows how much you enjoy your work, as well as how focused you are on getting things right.

[@WeingartnerRacing]

Thanks I do appreciate it.

[@55Dag]

Good timing on this review. I just started looking at the promaxx X. I'm really surprised you don't have twice the subs that you have. You do excellent reviews.

[@WeingartnerRacing]

Me too.

[@doctorwhodj]

Eric your channel has taught me a lot. I now want to buy a bare set of sbc heads do diy work on them and replace the camel humps on a street 350

[@mikegillam1000]

Thanks for another great review! I love seeing the head to head (no pun intended) comparisons. I think the observation of the exhaust valve difference was great. I was wondering why Promaxx heads seem to flow very well on the intake side but only so-so on exhaust

[@xlr8r3VA]

Great video Ertic, as always! Could you port a set of Project X heads to match or out flow the AFRs for less or equal to$2800? That’s the real question that should be asked. I would take your ported heads over factory any day. That personal touch makes a difference.

[@bradmullis6260]

Hi Eric , enjoy seeing all the reviews and information. I really would like to see the flow on the project x with a tulip exhaust valve.

[@mikelane5780]

Great review as always, can't wait for the Project X SBF 210

[@WeingartnerRacing]

I don't have that one here. I have the 185 and 205

[@trxtech3010]

I always try to like and comment when i can Eric. You have good stuff to learn here.

[@WeingartnerRacing]

Thanks.

[@brodykranendonk6082]

Keep up all the great content we all love to learn from you. Thanks for sharing your knowledge

[@WeingartnerRacing]

Thanks.

[@jonathonwhite9104]

Love your content, ability to teach, and humility!!

[@samrapheal1828]

Senor Eric, Thank You for your honesty-integrity-professionalism. All The Best🏁✔✔

[@WeingartnerRacing]

Thanks

[@mattkurtz8549]

I'm liking these project x heads

[@jj0132]

I love your channel, very educational especially for the beginner like me.

[@johnkufeldt3564]

Just going through a bunch of older vids, just starting the 3rd hour. Cheers from Canada.

[@johnfredricks7128]

Concidered running the sbc 183 cc for a high torque build

[@zachheindl8619]

Havent watched this yet but im SO excited you are analyzing these heads, the advertised flow numbers seem too good to be true, but im hoping theyre good heads for the money. Ill be doing a SBF though, would be nice to see what the Project X 210cc actually flow. I do wish they offered those in a bit bigger chamber size....on a 408 stroker those 56cc chambers are a tad small if youre a guy like me just tryna make something to go offroad with on pump gas

[@paulmoir4452]

I have very little interest in automotive engines, but I am very interested in how air likes to flow through them. I watch your videos for this: it is very practical and scientific.

[@WeingartnerRacing]

Thank you.

[@my87z28]

Good stuff, I believe had they both been flown on a 4.155' bore plate, the disparity between the two would become much more evident. The AFR exhaust side is around 72%, while the Promax exhaust side is around 63%. Putting them both on a 4.125" bore engine, I think the AFR would run away, especially above 5800rpm. Due to the AFR's efficiency and it's valve control. But, double the price is double the price.

[@WeingartnerRacing]

Maybe and I might try it later.

[@scottsigmon926]

Bad storms coming your way the next couple of days so stay safe. Thanks for the video, always interested in the low buck heads.

[@WeingartnerRacing]

I will look out for them.

[@donaldhalls2189]

Thanks again for the video, and all the information, can't wait to compare them to the Ford, all the best to you and your loved ones

[@jamesroberts807]

I just love your videos u r the best lol 😆, on a serious note your content is awesome. I have learned alot about porting and flow. Keep up the great work bro

[@WeingartnerRacing]

Im not the best but thank you.

[@builditinyourgarage7826]

Hello Eric, Thanks for another good video, it looks like the promaxx head is a good piece. I have heard quite a bit about these heads but never seen a set personally. Thanks for the review.

[@WeingartnerRacing]

Thanks for watching.

[@jayhambrick]

I really enjoy your videos. The info you provide is great to know.

[@WeingartnerRacing]

Thanks.

[@bobmoore4790]

You are informative, and down to earth . I enjoy that .

[@WeingartnerRacing]

Thank you.

[@gjponsford4892]

Great info, Eric, some of the most honest you’ll see anywhere.

[@WeingartnerRacing]

Thanks.

[@mikeclift3598]

Hey Eric Can’t wait to see the dyno pulls!

[@Comet-hn3gm]

Good information Eric. I hope you can get more subscribed. I would tell others that I know, but nobody I know would be interested in the content. They wouldn't understand the information and it would bore them to tears. That's what they have me for. Lol

[@WeingartnerRacing]

Thanks.

[@donaldgrove229]

Thanks Eric W. I do love the videos. The info is great.

[@WeingartnerRacing]

I appreciate you watching.

[@RedemptioncuesDNB]

So much knowledge in every video! 😮

[@richardsmith-qy6vl]

Wow I was really surprised with the Promax heads for 1400 dollars afr enforcer 195 as cast are over 1100 hundred and don't flow near that good and you compared those heads to the competition ported heads and for half the price it's a no brainer. Thanks for this information. So all I will have to do is get some solid roller springs and be in good shape I'd love to see what those heads would do with you just doing a little port work on them with a 60 grit cartridge roll. I bet you could really make them flow better. Your friend from Louisiana Rick 427.

[@WeingartnerRacing]

I can pick them up but not with the cartridge roll because they are smooth and very little flaws. The valve job may pick them up.

[@richardsmith-qy6vl]

@@WeingartnerRacing so far that is about the best deal and what is good you checked them out and flowed them if you think they are a good head then they are good and for half the price of the competition port afr 295 I'll save 1400 bucks that would just about cover a camshaft and intake on a build.thanks for the feed back

[@dannydurham5716]

We like it and need more of it. Thanks

[@trevorjohnson2315]

Great stuff as always, hard to find anyone doing these comparisons as honest and in-depth. Really makes the difference for underdog engine assemblers. I contacted Promaxx about their Project X 215, I was told their current batch is only available in 11/32 stem size; the batch prior had 8mm. Have you ever had trouble getting ahold of one size or the other?

[@WeingartnerRacing]

I have only recently been purchasing them but I never asked about the 8mm since the first one I ordered.

[@fyrbyrd71]

Not too shabby for out-of-the-box!

[@WeingartnerRacing]

Yep

[@juansandoval9282]

Very informative videos I watch everyone. Thank you for doing them.

[@WeingartnerRacing]

Thanks I enjoy doing them.

[@mikegonzalez4469]

Your channel is unique. Awesome content.... Keep bringing it !!!!!

[@WeingartnerRacing]

Unique isn't always a compliment but thank you.

[@artbray2024]

Your videos are great !!Always look forward to the next😉

[@WeingartnerRacing]

Thanks

[@richardboggs260]

Great information thank you for the video. I will be lookin for you at the PRI show

[@WeingartnerRacing]

Hopefully I will be at the AFR booth.

[@scottsigmon926]

Can’t wait to see the ford pro maxx heads!!!

[@WeingartnerRacing]

Me too.

[@jodysmith3662]

Would like to see some Dart head info. 227 cnc, 230 as cast.. always nice videos with great comparisons. Keep up the Good work Eric.

[@WeingartnerRacing]

I haven't seen a set in years.

[@kerryneville5290]

thank you after getting a bowtie block forged crank billet rods mahle powerpacks runnin out of funds quikly and ive had a set of protoplines on the shelf 220 cc from i think a guy named shaver or well sounds like that anyhow sense its 414 in a camaro wich will be driven everyday i happened on promax 200cc thought it will be better for street but absolutely love them for 450.00 dollars bare414 wants more head but for street these work great thanks for helping me decide....

[@WeingartnerRacing]

No problem

[@jeremymyers5643]

What did you end up doing with your pro toplines, are they aluminum?.

[@Moparornocar]

I'd like to see some work on some small block Mopar heads

[@WeingartnerRacing]

They never come in the shop.

[@claibornewoodlief8310]

Good video Eric great content keep them coming good luck buddy

[@WeingartnerRacing]

Thanks

[@lamarw9901]

Great review. I have a Ford friend which will be interested in that review.

[@WeingartnerRacing]

Hopefully I can get it done soon.

[@1DanishGuy]

top notch vider as always greetings from Denmark

[@WeingartnerRacing]

Thanks

[@ronnieb7408]

THE AFR port finish is what probably helps the flow but for the money Promaxx aint bad

[@WeingartnerRacing]

I don't think its the port finish but the valve job.

[@nicksteger1265]

Looking forward to the sbf Promaxx data!!!

[@josephhouze]

I watch all your videos first time commenting. I'm running a set of 195 Edelbrock on my 400 litte M we made 1010rwhp on 30psi and run 8.80 at 161mph look for a set of heads. you did a set of heads. for a friend of mine running the same setup

[@WeingartnerRacing]

Who was your friend.

[@josephhouze]

@@WeingartnerRacing Ralph hope

[@josephhouze]

Hoke

[@jeffwilliams8277]

What difference would tulip exhaust valves make and what would that cost?

[@WeingartnerRacing]

I would have to flow with them to tell you but about $200

[@magnusdanielsson2749]

So if one change to a tulip valve and maybe some light porting on the exhaust these seem quite a nice deal.

[@WeingartnerRacing]

Yep

[@jebuster38]

Great video! I like these comparison videos.

[@WeingartnerRacing]

Thanks for watching.

[@lawrenceskrobarczyk4402]

Really enjoy ur videos!

[@WeingartnerRacing]

Thanks.

[@funnybike1740]

I really appreciate the information on your vidios

[@WeingartnerRacing]

Thanks.

[@hobbesnmina2001]

Hi Eric, thanks for the reviews in general and this one in particular as I wanted to use it on a pump gas 400 SBC street and strip and hydraulic roller cam. Thanks and have a great Turkey day! 🇺🇸🦃🦃

[@jesusescalante5005]

Always good videos. Keep up the great work.

[@WeingartnerRacing]

Thanks

[@zAvAvAz]

so a .550" to .600" lift cam ought to be awesome on the street right on? Hydraulic roller or a mild solid roller.

[@conservativecrusader80]

Really appreciate your content.

[@krimsono4746]

Leaving a comment to do my part, youre worth it.

[@WeingartnerRacing]

I appreciate it.

[@inscoredbz]

The promaxx still looks like a better head than the afr enforcer. How much power difference do you think there would be on a 383 with a 244-248 .540-.560 110 HR cam with 10-1 compression and a Victor jr?

[@dondotterer24]

Do you ever radius the deck surface at the quench in front of the intake or exhaust valves? Thanks for the videos.

[@WeingartnerRacing]

Very rarely

[@dondotterer24]

@@WeingartnerRacing just wondering when you would do it?

[@mistered9435]

I’ve been wanting to know the same thing. I’m wondering if my gen2 lt4 heads would benefit from that since they have small exhaust valves and I’m running a big cam

[@WeingartnerRacing]

@@dondotterer24 I try not to because it hurts wet flow but on nitrous and turbo I do.

[@dondotterer24]

@@WeingartnerRacing I understand. Thanks

[@garyprice9895]

Great content. It would be interesting to see your results on a Ford modular 2v head considering its valve angle is oposite of any other head

[@WeingartnerRacing]

I had the plate to flow them but I let someone borrow it and never got it back but no big deal.

[@gmcnelly2468]

appreciate the promaxx head review.

[@WeingartnerRacing]

Thanks.

[@fast73nova]

Great video. I think AFR CNC’s the guide to don’t they? I think my old 195 comps were. Does that make any difference ?

[@kurtkurt9814]

Thanks for your videos!

[@TheManofgod38]

awesome videos thanks for all the great content

[@WeingartnerRacing]

Thanks.

[@danielchitwood5485]

APPRECIATE YOU MY GOOD SIR!

[@jamesandannschmitt6835]

I am working on a pair of old RHS heads that look very close to what you are showing.

[@WeingartnerRacing]

They are quite different except the chambers.

[@jamesandannschmitt6835]

@@WeingartnerRacing I saw as the images in video got better.

[@tomcelica]

I’ll be ordering a tshirt soon but here’s a question to see if comments help the channel. What’s the highest horsepower engine that you have done port work for? Oh and please make another rant video. I love those! Take care and stay out of the pool.

[@WeingartnerRacing]

A promod customer made 1700hp to the wheels. Not many of my customers try to push that hard.

[@jaycox4986]

Have been looking at these for 383 sbc for a few months now and greatly appreciate your reviews and all that you do. Do you think there is a better or as good as cast head in this price range ??

[@WeingartnerRacing]

Not at this price range.

[@robertopinto3221]

Any batty kno if this will be good for make 450 hp on 347?

[@jb314stl]

@6:20 They either quit doing it or forgot on the set I got. They have a raised 1mm high ridge all the way around the valves. I am not impressed.

[@billythebake]

Commenting to hack the algorithm... ... allegedly keep up the good work, Eric!

[@WeingartnerRacing]

Thanks.

[@sinistersilverado965]

like the testing you do

[@WeingartnerRacing]

Thanks

[@TheDicrio]

Liked, commented and already subscribed.

[@WeingartnerRacing]

Thank you.

[@w27cutlass]

Great video and info as always!

[@WeingartnerRacing]

I appreciate it.

[@MikeSmith-px7ec]

It looks like that guideplate wouldn't even line up with the pushrod hole even if you moved it over... I've heard of Promax heads having alignment issues, are they worth buying?

[@WeingartnerRacing]

They line up you have to adjust them. From the factory they just bolt them on for shipping.

[@MikeSmith-px7ec]

@@WeingartnerRacing ok good to know. It just looked like if you slid that guide over anymore the adjacent one would've been in the water jacket instead of the pushrod hole. I think I heard stories of when the Promax first came out there was problems. I even had a AFR 220 head that was very close on one pushrod hole. I had to adjust it just right and when I torqued the stud it would throw it off just enough it would start rubbing. Anyways, I appreciate the feedback I'll probably order a set of 200s for a budget build.

[@nitro1631]

Thanks for the review

[@kidsteach938]

enjoy your content, Eric!

[@WeingartnerRacing]

Thanks teacher.

[@richardsmith-qy6vl]

I had to watch this video again to make sure you said you can sell me a set of these heads for $1400 these heads should be able to support a 550 to 600 hp small block. I think I am going to get intouch with you for a set thanks for the video.rick 427

[@warby8138]

Do you think the larger bore allowed it to flow slightly more and cause the short side on the inlet to separate earlier on the Project-x because, the ARF and Promax back up to a similar about around the same point?

[@scottmcmullen7541]

Lol the search button answered my question. Ill be calling to discuss options on these heads.

[@pete540Z]

I'd like to see you flow the exhaust with a tulip valve.

[@WeingartnerRacing]

They are shipped out but I could on the next set.

[@srenlund-hansen6883]

love your reviews

[@reloadingfun]

Here's a little comment for you. Thanks for the video. What do you think of a 200cc head like this on a mild 350 or a 327? Is it too big?

[@joedavis845]

Appreciate all the info.

[@WeingartnerRacing]

Thanks for watching.

[@SteelHorse3]

Can you massage the pro max x heads to preform better where they are lacking.

[@WeingartnerRacing]

Im sure I can. I have one scheduled to start porting on November 14

[@SteelHorse3]

@@WeingartnerRacing Looking forward to the next video on the 14 .

[@johndienst3194]

Great cylinder head

[@WeingartnerRacing]

Yep

[@e85performance]

Hey Eric do you have and ported SBC 234-245 heads that are done for sale?

[@WeingartnerRacing]

Not of my stuff. Those are made to order. I can get an afr 235

[@scottmcmullen7541]

So ordering them Bare and putting good Valves in it is the way to go !

[@WeingartnerRacing]

I prefer it that way but it costs more.

[@troymecey]

Do you think that these would be a good head for a 406 running a 250hp shot of nitrous? Hydraulic roller, 1 3/4" headers into 3" exhaust.

[@WeingartnerRacing]

Its a little small to me.

[@MrMeuchelmord]

I really like your videos But I would have liked to see you take a set of honda b16 head f.ex and get your meaning of those Or other "small" but high output engine Keep up the good work

[@WeingartnerRacing]

I just don't mess with Import heads.

[@indyrock8148]

Great heads, but you know on consideration I would run the older maxx heads. Why? They don't choke out.

[@oldguyworks1650]

Thanks for the info!

[@WeingartnerRacing]

Thanks.

[@davidreed6070]

I have a friend in Fayetteville, a head porter having trouble with a set of ford kaase heads he would like to talk to another porter.

[@brianeffler7835]

Good information. Thank you.

[@WeingartnerRacing]

Thanks for watching.

[@flflash4717]

Always good info!

[@richambler8019]

Looks good to me.

[@WeingartnerRacing]

yep