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.

[@johnkufeldt3564]

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

[@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.

[@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

[@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! 🇺🇸🦃🦃

[@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.

[@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.

[@mattkurtz8549]

I'm liking these project x heads

[@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.

[@samrapheal1828]

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

[@WeingartnerRacing]

Thanks

[@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.

[@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.

[@jonathonwhite9104]

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

[@brodykranendonk6082]

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

[@WeingartnerRacing]

Thanks.

[@nicksteger1265]

Looking forward to the sbf Promaxx data!!!

[@mikeclift3598]

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

[@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

[@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?.

[@trxtech3010]

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

[@WeingartnerRacing]

Thanks.

[@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.

[@fyrbyrd71]

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

[@WeingartnerRacing]

Yep

[@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

[@jj0132]

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

[@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

[@scottsigmon926]

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

[@WeingartnerRacing]

Me too.

[@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.

[@scottmcmullen7541]

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

[@dannydurham5716]

We like it and need more of it. Thanks

[@RedemptioncuesDNB]

So much knowledge in every video! 😮

[@gjponsford4892]

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

[@WeingartnerRacing]

Thanks.

[@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.

[@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

[@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.

[@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.

[@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.

[@lamarw9901]

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

[@WeingartnerRacing]

Hopefully I can get it done soon.

[@bobmoore4790]

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

[@WeingartnerRacing]

Thank you.

[@krimsono4746]

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

[@WeingartnerRacing]

I appreciate it.

[@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

[@danielchitwood5485]

APPRECIATE YOU MY GOOD SIR!

[@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.

[@donaldgrove229]

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

[@WeingartnerRacing]

I appreciate you watching.

[@Moparornocar]

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

[@WeingartnerRacing]

They never come in the shop.

[@jayhambrick]

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

[@WeingartnerRacing]

Thanks.

[@sinistersilverado965]

like the testing you do

[@WeingartnerRacing]

Thanks

[@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.

[@gmcnelly2468]

appreciate the promaxx head review.

[@WeingartnerRacing]

Thanks.

[@conservativecrusader80]

Really appreciate your content.

[@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.

[@kurtkurt9814]

Thanks for your videos!

[@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.

[@funnybike1740]

I really appreciate the information on your vidios

[@WeingartnerRacing]

Thanks.

[@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

[@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 ?

[@mikegonzalez4469]

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

[@WeingartnerRacing]

Unique isn't always a compliment but thank you.

[@juansandoval9282]

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

[@WeingartnerRacing]

Thanks I enjoy doing them.

[@nitro1631]

Thanks for the review

[@alexhise968]

Your doing well

[@1DanishGuy]

top notch vider as always greetings from Denmark

[@WeingartnerRacing]

Thanks

[@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.

[@johndienst3194]

Great cylinder head

[@WeingartnerRacing]

Yep

[@lawrenceskrobarczyk4402]

Really enjoy ur videos!

[@WeingartnerRacing]

Thanks.

[@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

[@joedavis845]

Appreciate all the info.

[@WeingartnerRacing]

Thanks for watching.

[@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.

[@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.

[@artbray2024]

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

[@WeingartnerRacing]

Thanks

[@kidsteach938]

enjoy your content, Eric!

[@WeingartnerRacing]

Thanks teacher.

[@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?

[@zAvAvAz]

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

[@oldguyworks1650]

Thanks for the info!

[@WeingartnerRacing]

Thanks.

[@richambler8019]

Looks good to me.

[@WeingartnerRacing]

yep

[@claibornewoodlief8310]

Good video Eric great content keep them coming good luck buddy

[@WeingartnerRacing]

Thanks

[@jebuster38]

Great video! I like these comparison videos.

[@WeingartnerRacing]

Thanks for watching.

[@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

[@billythebake]

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

[@WeingartnerRacing]

Thanks.

[@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.

[@rickhaile2190]

Half the price of the AFRs. You could afford a little porting on the exhaust side, or tulip valves. Unless you're bucks up, I think the Flomax heads are the way to go.

[@srenlund-hansen6883]

love your reviews

[@TheManofgod38]

awesome videos thanks for all the great content

[@WeingartnerRacing]

Thanks.

[@jesusescalante5005]

Always good videos. Keep up the great work.

[@WeingartnerRacing]

Thanks

[@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?

[@TheDicrio]

Liked, commented and already subscribed.

[@WeingartnerRacing]

Thank you.

[@marvinelzaelza1686]

Awesome

[@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?

[@brianeffler7835]

Good information. Thank you.

[@WeingartnerRacing]

Thanks for watching.

[@flflash4717]

Always good info!

[@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.

[@w27cutlass]

Great video and info as always!

[@WeingartnerRacing]

I appreciate it.

[@indyrock8148]

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

[@drivinwithdrew7676]

If you put 1400 bucks into a set of the project x heads, I bet they beat the AFRs then, that would be a cool 3 video series

[@WeingartnerRacing]

Im sure I can get them to beat them.

[@patrickwendling6759]

Thank you

[@WeingartnerRacing]

No thank you.

[@thelol1759]

Leavin a comment for you Eric!

[@WeingartnerRacing]

Thank you.

[@robertopinto3221]

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

[@davidwalker8348]

Great content!