you could say... across the 2 videos, all the free horse power mods combined were worth 10.5 hp... which is actually quite significant 👍👍

Great to see someone still willing to try hard with the O. H. C. Thank you for your videos.

Every bit helps 👍 Keep them coming, your channel is gold.

More old tricks, porting and smoothing oil pump passages, same to the water. Pump and thermostat housing. Every sharp edge removed and your going to see some gains.

The edge sharpening of the circle on the aux. Venturi is a old Italian trick... They say it's to "invitate the air" !!!

Thanks for this video! I like your ideas, keep the momentum!

Nice vid Graham 👍🏻👍🏻 Go Big or go home 🤣🤣 Back in the day baffle out of exhaust on my Honda mb50 made a racket never did go any faster 😂

I like it, 0 bs, mod, test, result, very nice.

I know this is old but I'll put some stuff here anyway. I built my 2.0L pinto motor up a bit. One of the early stock modifications is to retard the stock cam a few degrees. I didn't have an adjustable so I just filed the keyway 3/64". That made a noticeable difference in drivability. After that I put a really good street cam and the legendary Holly 390 4V on a weiand manifold and a set of headers, into stock exhaust. I had the engine apart so I had it all checked for cracks and balanced. I also put a aftermarket pointless ignition and was able to shift at 7000 RPM. (The 4 speed stock transmission did not like that one bit). I absolutely loved that engine. The coupling between the header and the exhaust kept coming lose. After putting back on several times I realized I was pushing too much air for the stock muffler and it was blowing off.

Great video 👍

Thanks! The Carbspacer works really well in my 1600 ohc! Accelerating and RPM range runs better.

I remember back in the day all of us pulling the choke flaps and bar out thinking it made loads of power 😂😂😂. What it would do these days is save you about £3 in wasted fuel every time you cold start so gota be worth it for that

IT'S COMING !!!!!!!

More tutorials plz

Good video Graham , your right in the scheme of things anything is better than nothing , so your saying 10+ hp gain on spacers and other minimal mods. Did the mixtures need fettling at all ....

My Ford 2.0 engine I got better gas mileage and better performance when I order a electronic ignition system and installed it and stopped using the standard points in the distributor 👍🌎🇺🇸 Joey ⚓

Be interesting to know how you rejetted the carb

There was an outbreak of insanity that made guys throw away their chokes and even mill down the choke towers on Holley four barrels. Now it is nearly impossible to find a used one that isn't butchered. The parts thrown away cost a fortune to replace. Of course there was no horsepower gain. Also, the engines subjected to this abuse got the cylinders washed down with fuel as guys tried to start a chokeless engine. And the valves got burnt as guys drove around on an engine running too lean. "Duh. Works just fine... ahhh don need no choke..." said Bubba. Before he put rear shackles on the back springs...

Superb content! Have you tested knife edging the throttle plates?

I would love to know what timing curve did you test at. (Base timing) vs advance per rpm. Peak advance. At what rpm. Wondering how much is too much. When do you encounter knock/ destination. Very interested 🙏 I feel like that would be a good video if you hadn't gone over that yet.

Have you ever tested out the low compression vs high compression pinto?

but did you increase the main jets after going up 2mm on the chokes?? it MUST have run weaker after boring them out ! go up 0.10 on the mains and test again!!

Dónde comprar la polea del árbol de levas?

Hey man.like your videos. I'm from SA and bought a Pinto engine 205 block. Standard engine.want some advice and parts.how can I get in touch with you pls.

Is your 32/36 still progressive or do you run a sync-link?

Do you have a link for the dcd spindal screws?

does higher octane fuel make any difference?

One more question: When boring the chokes, would the jet size have to be adapted? If so, means bigger choke size a bigger (bc more airflow) or smaller (bc less velocity in venturi) jet?

Would love to hear those bike carbs

So can you now test the 38dgas with no mods to the modified 32/36

3bhp still is a lot with fast mods! on stock 205 will be aroud 2hp ez

Some ppl say ±6bhp of gain swapping for electric fan ...

I'm surprised that removing the choke flaps made no difference and possibly even lost power in the lower RPM range. As those flaps cut across the bore at a different angle to the auxiliary venturis, is it possible that this sets up a sort of twist in the airflow, creating swirl which improves combustion? If yes, could sidedraughts benefit from having some sort of swirl vane added inside the trumpets? Regarding the airhorn, you said you found an inexpensive 3D printed item on eBay. I can only find an expensive aluminium billet item. I guess your testing shows that it's not a part worth paying money for, no matter the price.

There is no substitute for cc